1. An analyzer for static sample retention of ammonia water is characterized by comprising,

the sampling analysis module comprises a standing liquid storage tank (1), a liquid inlet vacuum pump (2) and a tuning fork densimeter (18) arranged on the standing liquid storage tank (1), and the standing liquid storage tank (1) is communicated with the liquid inlet and the liquid inlet vacuum pump (2) respectively;

the stock layout module is connected with the sampling analysis module and comprises a liquid discharge vacuum pump (3) and a plurality of electromagnetic valves (4), and the standing liquid storage tank (1) is communicated with the liquid discharge vacuum pump (3) and a liquid outlet through the electromagnetic valves (4) respectively;

the sample reserving module comprises a sample reserving liquid storage tank (5), wherein the sample reserving liquid storage tank (5) is communicated with a second liquid inlet connector (15) and a second liquid discharging connector (17) which are arranged on the standing liquid storage tank (1) respectively.

2. The analyzer for static sample retention of ammonia water according to claim 1, further comprising a cleaning module, wherein the cleaning module comprises a cleaning liquid input port and a plurality of solenoid valves (4), and the cleaning liquid input port is communicated with the standing liquid storage tank (1) and the sample retention liquid storage tank (5) through the solenoid valves (4) respectively.

3. The analyzer for static retention of ammonia water as claimed in claim 1, wherein the top of the retention sample storage tank (5) is communicated with the exhaust port through the air release valve (6).

4. The analyzer for static retention of ammonia water samples according to claim 1, characterized in that a one-way valve (7) is arranged between the standing liquid storage tank (1) and the liquid outlet.

5. The analyzer for static retention of ammonia water samples according to claim 1, characterized in that a solenoid valve (4) is arranged between the standing liquid storage tank (1) and the liquid inlet.

6. The analyzer for the static retention of ammonia water samples according to claim 1, characterized in that a one-way valve (7) is arranged on a connecting passage between the sample retention liquid storage tank (5) and the second liquid inlet (15) on the standing liquid storage tank (1).

7. The analyzer for static retention of ammonia water sample according to claim 1, characterized in that a liquid level meter and a temperature sensor (19) are arranged in the static liquid storage tank (1).

8. A method for controlling the ammonia water static sample retention analyzer according to claim 1, comprising the steps of:

s1, the sampling analysis module operates, the electromagnetic valve (4) is switched on, the liquid inlet vacuum pump (2) is started, the ammonia water solution in the main pipeline flows into the standing liquid storage tank (1), when the capacity reaches a first set position, the liquid inlet vacuum pump (2) and the electromagnetic valve (4) are switched off, the ammonia water solution in the standing liquid storage tank (1) is analyzed after standing for a first set time in the standing liquid storage tank (1), and the sampling analysis module is switched off;

s2, after the sampling module operates for a first set time, the sample reserving module operates, the ammonia water solution in the standing liquid storage tank (1) flows into the sample reserving liquid storage tank (5), when the capacity of the ammonia water solution in the standing liquid storage tank (1) reaches a second set position, the sample reserving module stops working, whether manual analysis is needed or not is judged, if yes, sampling analysis is carried out through a bottom sampling port of the sample reserving liquid storage tank (5), and the step S3 is carried out after the analysis is finished, otherwise, the step S3 is directly carried out;

s3, starting the sample discharging module, starting the liquid discharging vacuum pump (3) and the electromagnetic valve (4), discharging the ammonia water solution in the standing liquid storage tank (1) and the sample reserving liquid storage tank (5), and repeatedly entering the step S1 until the ammonia water solution is unloaded;

and S4, after the ammonia water solution is unloaded, opening the electromagnetic valve (4), and discharging the cleaning solution after the cleaning solution enters the loop and is cleaned.

9. The method for controlling the analyzer for static ammonia liquid retention according to claim 8, wherein the first set time is 10-20 seconds.

10. The method of claim 8, wherein the cleaning module cleans the loop before step S1 is started.

Background

The ammonia water belongs to toxic liquid, has irritation and corrosiveness to eyes, noses and skins, is volatile, and increases the volatilization rate along with the rise of temperature and the prolonging of the standing time. In the ammonia water detection method in the prior art, a person needs to sample ammonia water on site under the conditions of wearing a special anti-corrosion garment and wearing a comprehensive anti-poison respirator, and then the ammonia water is sent to a laboratory for detection, and sampling equipment needs to be cleaned and disinfected so as not to influence the actual concentration of the ammonia water.

However, the prior art has the following disadvantages: firstly, the labor and time are consumed, the efficiency is low, the development requirements of modern industry cannot be met, and certain potential safety hazards exist; secondly, if the operation flow is not well controlled in the ammonia water sampling process, the concentration of the sampled ammonia water and the actual concentration of the ammonia water can be greatly deviated.

Disclosure of Invention

The invention aims to provide an ammonia water static sample retention analyzer and a control method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an analyzer for static sample retention of ammonia water comprises,

the sampling analysis module comprises a standing liquid storage tank, a liquid inlet vacuum pump and a tuning fork densimeter arranged on the standing liquid storage tank, and the standing liquid storage tank is respectively communicated with the liquid inlet and the liquid inlet vacuum pump;

the sample arrangement module is connected with the sampling analysis module and comprises a liquid discharge vacuum pump and a plurality of electromagnetic valves, and the standing liquid storage tank is respectively communicated with the liquid discharge vacuum pump and the liquid outlet through the electromagnetic valves;

and the sample reserving module comprises a sample reserving liquid storage tank, wherein the sample reserving liquid storage tank is respectively communicated with a second liquid inlet connector and a second liquid discharging connector on the standing liquid storage tank.

Further improved, the static appearance of staying of aqueous ammonia still includes washs the module, it includes washing liquid input port and a plurality of solenoid valve to wash the module, the washing liquid input port respectively through the solenoid valve with the liquid storage pot of stewing and the intercommunication of the liquid storage pot of staying a kind.

Further improved, the top of the sample reserving liquid storage tank is communicated with an air outlet through an air escape valve.

In a further improvement, a one-way valve is arranged between the standing liquid storage tank and the liquid outlet.

In a further improvement, an electromagnetic valve is arranged between the standing liquid storage tank and the liquid inlet.

In a further improvement, a one-way valve is arranged on a connecting passage of the sample reserving liquid storage tank and the second liquid inlet on the standing liquid storage tank.

In a further improvement, a liquid level meter and a temperature sensor are arranged in the standing liquid storage tank.

The invention also provides a control method of the ammonia water static sample retention analyzer, which comprises the following steps:

s1, discharging the cleaning liquid after the cleaning liquid enters the loop and is cleaned;

s2, the sampling analysis module operates, the electromagnetic valve is switched on, the liquid inlet vacuum pump is started, the ammonia water solution in the main pipeline flows into the standing liquid storage tank, when the capacity reaches a first set position, the liquid inlet vacuum pump and the electromagnetic valve are switched off, the ammonia water solution in the standing liquid storage tank is analyzed after standing for a first set time, and the sampling analysis module is switched off;

s3, after the sampling module runs for a first set time, the sample reserving module runs, the ammonia water solution in the standing liquid storage tank flows into the sample reserving liquid storage tank, when the ammonia water solution capacity in the standing liquid storage tank reaches a second set position, the sample reserving module stops working, whether manual analysis is needed or not is judged, if yes, sampling analysis is carried out through a bottom sampling port of the sample reserving liquid storage tank, and the step S4 is executed after the analysis is finished, otherwise, the step S4 is directly executed;

s4, starting the sample discharging module, opening a liquid discharging vacuum pump and a solenoid valve, discharging the ammonia water solution in the standing liquid storage tank and the sample reserving liquid storage tank, and repeatedly entering the step S2 until the ammonia water solution is unloaded;

and S5, finishing unloading of the ammonia water solution, opening the electromagnetic valve, and discharging the cleaning liquid after the cleaning liquid enters the loop and is cleaned.

Preferably, the first set time is 10 to 20 seconds.

Preferably, the cleaning module cleans the loop before the start of step S1.

Preferably, in step S1, the ammonia water solution is subjected to temperature and density analysis and detection by the tuning fork densimeter in the standing liquid storage tank, the obtained data is transmitted to the auxiliary host of the ammonia water analyzer for concentration analysis, and finally the data is transmitted to the host and recorded in the database.

Compared with the prior art, the invention has the beneficial effects that:

(1) the sampling analysis module is integrated in the ammonia water sample retention instrument, the ammonia water solution conveyed into the standing liquid storage tank stands in the ammonia water sample retention instrument and is subjected to temperature and density analysis and detection, the ammonia water analyzer is used for assisting a host to analyze the concentration in real time, final data are transmitted to a touch screen of the host to be displayed and recorded in a database of the host, an operator can conveniently check and call the ammonia water solution, the detected ammonia water solution is directly output through the sample discharge module, extra manpower is not needed in the whole process for analysis and detection, the errors of artificial interference and artificial sampling are avoided, the use efficiency is improved, and the potential safety hazard of the operator is reduced;

(2) the invention is provided with a sample reserving module connected with the standing liquid storage tank, when the ammonia water solution enters the standing liquid storage tank, the sample reserving module operates, the ammonia water solution in the sample reserving module is pumped into the sample reserving liquid storage tank for sample reserving, whether manual detection is carried out or not is selected according to the situation, if the ammonia water solution is reserved for a certain time, the electromagnetic valve is automatically opened without manual detection and analysis, and the ammonia water solution is discharged to a main pipeline through the standing liquid storage tank. The accuracy of ammonia water detection can be improved, the situation that the concentration of ammonia water sampling is greatly deviated from the actual concentration of ammonia water is avoided, unnecessary waste can be avoided, and the ammonia water solution in the sample reserving liquid storage tank finally flows back to the standing liquid storage tank to be discharged;

(3) the operation process of the invention is machine automation, the operation flow in the ammonia water sampling process is controlled by the system, thereby avoiding the error possibly generated in the manual operation, saving the labor and time and improving the overall efficiency.

Drawings

FIG. 1 is a schematic diagram of a pipeline of an ammonia water static sample retention instrument of the invention;

FIG. 2 is a schematic view of the static liquid storage tank of the present invention;

in the figure: 1. standing the liquid storage tank;

11. a first liquid inlet joint; 12. a first drain fitting; 13. an exhaust joint; 14. cleaning the joint; 15. a second liquid inlet joint; 16. an air inlet joint; 17. a second drain connector; 18. a tuning fork densitometer; 19. a temperature sensor;

2. a liquid inlet vacuum pump;

3. a liquid discharge vacuum pump;

4. an electromagnetic valve;

5. reserving a sample liquid storage tank;

51. a sampling port;

6. a gas release valve;

7. a one-way valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1-2, an ammonia water static retention analyzer comprises a sampling analysis module, a sample discharge module and a retention module, wherein the sampling module comprises a standing liquid storage tank 1, a liquid inlet vacuum pump 2 and a tuning fork densimeter 18 arranged on the standing liquid storage tank 1, and the standing liquid storage tank 1 is respectively communicated with a liquid inlet and the liquid inlet vacuum pump 2; the stock layout module is connected with the sampling analysis module and comprises a stock layout vacuum pump 3 and a plurality of electromagnetic valves 4, and the standing liquid storage tank 1 is respectively communicated with the stock layout vacuum pump 3 and a liquid outlet through the electromagnetic valves 4; the sample reserving module comprises a sample reserving liquid storage tank 5, wherein the sample reserving liquid storage tank 5 is respectively communicated with a second liquid inlet connector 15 and a second liquid discharging connector 17 which are arranged on the standing liquid storage tank 1.

The working principle is as follows: the uninstallation pipe of aqueous ammonia tank car with the static main line butt joint of staying appearance analysis appearance of aqueous ammonia, the aqueous ammonia uninstallation, the aqueous ammonia solution that awaits measuring gets into from the inlet, feed liquor vacuum pump 2 begins work, the air in the liquid storage pot 1 that stews is taken out through exhaust joint 13 the liquid storage pot 1 that stews forms the negative pressure, the aqueous ammonia solution that awaits measuring is from being located the first feed joint 11 inflow at liquid storage pot 1 top of steing, the aqueous ammonia solution that awaits measuring is in the defoaming of steing in the liquid storage pot 1 makes the aqueous ammonia solution that awaits measuring not form vortex, bubble at testing process, causes harmful effects to the testing result. After the detection of the ammonia water solution in the standing liquid storage tank 1 is finished after the standing, the liquid discharge vacuum pump 3 starts to work, air is injected into the standing liquid storage tank 1 through the air inlet connector 16, positive pressure is formed in the standing liquid storage tank 1, the detected ammonia water solution is discharged from a first liquid discharge connector 12 positioned at the bottom of the standing liquid storage tank 1, and the first liquid discharge connector 12 is communicated with a liquid outlet;

leave appearance liquid storage pot 5 top and be provided with release valve 6 and gas vent intercommunication, the aqueous ammonia solution that awaits measuring is getting into the liquid storage pot 1 back of stewing, release valve 6 begins work, the air in the liquid storage pot 5 of leaving an appearance is discharged form the negative pressure in the liquid storage pot 5 of leaving an appearance, be located the aqueous ammonia solution that awaits measuring in the liquid storage pot 1 of stewing is through second flowing back connector 17 by the suction leave an appearance in the liquid storage pot 5 of leaving an appearance, if need artifical retest then the aqueous ammonia solution that awaits measuring take out from sample connection 51 and carry out artifical the detection, if need not detect or detect after finishing remaining aqueous ammonia solution then passes through in the liquid storage pot 5 of leaving an appearance second flowing back connector 15 extremely in the liquid storage pot 1 of stewing. In this embodiment, the sample retention liquid storage tank 5 is arranged above the standing liquid storage tank 1, so that the sample retention liquid storage tank has a height difference, and the ammonia water solution returns from the sample retention liquid storage tank 5 to the standing liquid storage tank 1 only by the action of gravity in the process of flowing back to the standing liquid storage tank 1.

Referring to fig. 2, the standing liquid storage tank 1 is provided with a tuning fork densimeter 18 and a temperature sensor 19, the tuning fork densimeter 18 can detect parameters such as the concentration and the density of ammonia water in the cavity through the change of the resonant frequency caused by the mass change generated when the ammonia water flows through, and the temperature sensor 19 can be used for detecting the temperature of the ammonia water. Tuning fork densimeter 18 with temperature sensor 19 is the level setting and is in 1 both sides of liquid storage pot of stewing can effectively increase its area of contact with aqueous ammonia solution to the atress is more even when making its contact and aqueous ammonia contact, improves the testing result reliability. And the interface side of the liquid storage tank 1 is provided with a flange cover and a clamp for sealing, and the flange cover is matched with the clamp to fix the joint, the tuning fork densimeter and the temperature sensor on the liquid storage tank 1 for standing and realizing sealing.

In this embodiment, the aqueous ammonia certainly the first liquid inlet joint 11 in liquid storage pot 1 top of stewing flows in the 1 inside cavity of liquid storage pot of stewing to the defoaming is carried out to a period of stewing, tuning fork densimeter and temperature sensor detect the aqueous ammonia after the standing, and will detect data record, and the aqueous ammonia after the defoaming of stewing can reduce tuning fork densimeter and temperature sensor's measuring error, has guaranteed the real-time measuring accuracy of data such as solution concentration, temperature, and the aqueous ammonia after the measurement is again through being located the use of discharging of the first drain joint 12 of liquid storage pot 1 bottom of stewing. The whole process is completed by mechanical automation, manual detection is not needed, labor is saved, the use is convenient, the influence on the liquid to be detected can be further avoided when the liquid is taken manually, the accuracy of a detection result is improved, and potential safety hazards in the operation process are reduced.

In this embodiment, the static appearance of staying of aqueous ammonia still includes washs the module, it includes washing liquid input port and a plurality of solenoid valve 4 to wash the module, the washing liquid input port respectively through solenoid valve 4 with the liquid storage pot 1 of stewing communicates with the liquid storage pot 5 of staying kind. When receiving the washing order, solenoid valve 4 opens, release valve 6 and flowing back vacuum pump 3 begin work, form the negative pressure with the air discharge in the return circuit, make cleaning solution self-cleaning joint 14 get into in the liquid storage pot 1 that stews, from the liquid storage pot 1 that stews discharges in the reservationpot 5, accomplish the discharge return circuit after wasing.

In this embodiment, sample reserving liquid storage pot 5 top is through release valve 6 and gas vent intercommunication, release valve 6 is used for control the pressurized condition in the sample reserving liquid storage pot 5, and then the circulation of control solution.

In this embodiment, a check valve 7 is arranged between the standing liquid storage tank 1 and the liquid outlet, and a check valve 7 is arranged on a connecting passage between the sample retention liquid storage tank 5 and the second liquid inlet 15 on the standing liquid storage tank 1. The one-way valve 7 can ensure that the solution can only advance along one direction in the circulation process, and avoid the backflow generated in the use process and the adverse effect on equipment and use.

In this embodiment, an electromagnetic valve 4 is arranged between the standing liquid storage tank 1 and the liquid inlet, and when the electromagnetic valve 4 is opened, the ammonia water solution flows into the standing liquid storage tank 1.

In this embodiment, still be provided with the level gauge in the liquid storage pot 1 of stewing, the level gauge is used for monitoring 1 aqueous ammonia capacity of liquid storage pot of stewing, when detecting the aqueous ammonia capacity and reaching certain threshold value, liquid storage pot 1 of stewing closes, and aqueous ammonia solution is forbidden to be discharged, works as the level gauge monitors to be located when aqueous ammonia solution in the liquid storage pot 1 of stewing discharges to the setting value, liquid storage pot 1 of stewing opens, and aqueous ammonia solution continues to discharge.

Referring to fig. 1, the present invention further provides a method for controlling an analyzer for static sample retention in ammonia water, comprising the following steps:

s1, after the ammonia water tank truck arrives at the unloading position, the ammonia water static sample retention analyzer identification module automatically senses, records the identified license plate and sends a message to the central control system; meanwhile, the cleaning module starts to work, the electromagnetic valve 4 in the loop is opened, the liquid inlet vacuum pump 2 starts to exhaust air, the air escape valve 6 is opened, air in the standing liquid storage tank 1 is extracted to form negative pressure, cleaning solution flows into the standing liquid storage tank 1, the air escape valve 6 discharges air in the sample retention liquid storage tank 5 to form negative pressure, the cleaning solution is sucked into the sample retention liquid storage tank 5 from the standing liquid storage tank 1, the cleaning solution sequentially flows into the standing liquid storage tank 1 and the sample retention liquid storage tank 5 through a pipeline, after cleaning is completed, the liquid outlet vacuum pump 3 starts to work, and air is injected into the loop to discharge the cleaning solution;

s2, after cleaning, the unloading pipe of the ammonia water tank truck is in butt joint with the liquid inlet of the static ammonia water sample retention analyzer, the ammonia water begins to be unloaded, the sampling analysis module operates and is located the liquid inlet is communicated with the electromagnetic valve 4 between the standing liquid storage tanks 1, the liquid inlet vacuum pump 2 is started to begin to pump air, negative pressure is formed in the standing liquid storage tanks 1, and the ammonia water solution in the main pipeline flows into the standing liquid storage tanks 1. A liquid level meter is arranged in the standing liquid storage tank 1, when the capacity of the ammonia water solution reaches a first set position of the liquid level meter, the liquid inlet vacuum pump 2 and the electromagnetic valve 4 are disconnected, the ammonia water solution is stood in the standing liquid storage tank 1 for 10-20s, the ammonia water solution is analyzed by the tuning fork densimeter and the temperature sensor in the standing liquid storage tank 1, and the sampling analysis module is closed;

in step S2, turbulence and bubbles are generated during transportation and extraction of the ammonia solution, which may affect the detection and usage. In the embodiment, after the electromagnetic valve 4 is closed, the ammonia water solution needs to stand in the standing liquid storage tank 1 for 10-20s, the liquid inlet vacuum pump 2 starts to pump air with low power for 5-15s, gas in bubbles generated by the ammonia water solution is pumped out, and the bubbles are broken to achieve a defoaming effect, and after the liquid inlet vacuum pump 2 is closed, the ammonia water solution continues to stand in the standing liquid storage tank 1 for 5-15s to thoroughly defoam and eliminate turbulent flow, so that subsequent measurement is facilitated, and the reliability of a detection structure is improved;

in step S2, data obtained after ammonia water temperature and density analysis and detection are performed by the tuning fork densitometer and the temperature sensor are transmitted to the auxiliary host of the ammonia water static sample retention analyzer, the MCU of the auxiliary host of the ammonia water static sample retention analyzer performs concentration analysis in real time, and final data of temperature, density, concentration and flow rate are transmitted to the touch screen of the host to be displayed and recorded in the database of the host.

S3, after the sampling module runs for the first set time, the sample reserving module runs, the air escape valve 6 is opened, the air in the sample reserving liquid storage tank 5 is discharged to form negative pressure, the ammonia water solution is pumped into the sample reserving liquid storage tank 5 in the liquid storage tank 1 for standing, the capacity of the ammonia water solution in the liquid storage tank 1 for standing reaches when the second set position of the liquid level meter is set, the sample reserving module stops working, whether manual analysis is needed is judged, if the sample reserving of the ammonia water is needed, the sample is sampled and analyzed through the bottom sampling port 51 of the sample reserving liquid storage tank 5, if the ammonia water sample is reserved for a certain time, the ammonia water solution is left without manual detection and analysis or detection, the electromagnetic valve 4 is automatically opened, and the ammonia water solution flows back to the liquid storage tank 1 for standing and is discharged to the main pipeline;

s4, starting a stock layout module, opening the electromagnetic valve 4, starting the liquid discharge vacuum pump 3 to inflate the standing liquid storage tank 1 to form positive pressure, discharging the ammonia water solution in the standing liquid storage tank 1 from a liquid discharge port, and repeatedly entering the step S2 until the ammonia water solution in the ammonia water tank truck is unloaded;

and S5, finishing unloading the ammonia water solution, opening the electromagnetic valve 4, executing the cleaning module in the step S1, and discharging the cleaning solution after the cleaning solution enters the loop and is cleaned.

In the embodiment, the detectable temperature range of the ammonia water solution is-40 ℃ to 85 ℃; the concentration range is 0-100%, and the measurement precision is +/-0.5%; the density range is 0-2 g/ml, and the measurement precision is as follows: 0.003 g/ml; flow rate range: 0.1-15 m/s. The measuring range and the measuring range can be correspondingly set according to specific requirements.

In the embodiment, when the sampling module works, the sampling speed is 0.1ml/min to 25 ml/min; the sampling time is set within the range of 2-300 minutes; the sampling volume is set within a range of 30 to 1000 ml. The sampling range and the measuring range can be correspondingly set according to specific requirements.

In this embodiment, the static appearance analysis appearance operation process of staying of aqueous ammonia is the machine automation, and aqueous ammonia sampling in-process operation flow is whole by system control, carry out temperature, density analysis detection to aqueous ammonia solution through the tuning fork densimeter in the stock solution jar that stews, the data transmission who obtains carries out concentration analysis to the attached host computer of aqueous ammonia analysis appearance immediately, and final data transmission is to the host computer and record the database, the error that probably takes place when avoiding manual operation, uses manpower sparingly and time, improves overall efficiency.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.