1. The refining treatment equipment of the condensate is characterized by comprising a process condensate pretreatment system, a turbine condensate pretreatment system and a desalting system;

the process condensate pretreatment system comprises a first heat exchanger, a first condensation water tank, a first iron removal filter and an activated carbon filter, and the process condensate is introduced into the desalting system after heat exchange, condensation, iron-containing impurity removal and oil stain removal are sequentially carried out on the process condensate;

the turbine condensate pretreatment system comprises a second heat exchanger, a second condensation water tank and a second iron removal filter, and the turbine condensate is subjected to heat exchange, condensation and iron-containing impurity removal in sequence and then is introduced into the desalting system;

the desalting system comprises a mixed bed and a desalting water tank; the mixed bed removes anions and cations in the process condensate and the turbine condensate and then feeds the process condensate and the turbine condensate into a desalting water tank for storage.

2. The refining treatment equipment of the condensate according to claim 1, wherein the first heat exchanger or the second heat exchanger is a tubular heat exchanger and comprises a cylinder body, and partition plates are arranged in the cylinder body at intervals to divide the cylinder body into a plurality of cavities; the cavity body positioned at the first end of the cylinder body is a condensate input cavity which is used for inputting process condensate or turbine condensate; the cavity body positioned at the second end of the cylinder body is a condensate output cavity for outputting process condensate or turbine condensate; a multi-stage heat exchange cavity is arranged between the condensate input cavity and the condensate output cavity, and a liquid inlet pipe and a liquid outlet pipe are respectively arranged on each heat exchange cavity; a heat exchange tube bundle penetrating through all the heat exchange cavities is arranged in the barrel body, the first end of the heat exchange tube bundle is communicated with the condensate input cavity, and the second end of the heat exchange tube bundle is communicated with the condensate output cavity.

3. The apparatus for refining and treating condensed liquid as claimed in claim 2, wherein the liquid inlet pipe of each heat exchange chamber is independently fed with liquid and is connected with a liquid inlet pump.

4. The apparatus for refining and processing condensate as claimed in claim 2, wherein the liquid inlet pipe of the first stage heat exchange chamber is provided with a liquid inlet pump; a three-way valve is arranged between every two adjacent heat exchange cavities, the first end of the three-way valve is connected with a liquid outlet pipe of the previous heat exchange cavity, and the second end of the three-way valve is connected with a liquid inlet pipe of the next heat exchange cavity; the three-way valve also comprises a liquid outlet main pipe, and the liquid outlet main pipe is connected with the third ends of all the three-way valves.

5. The apparatus for refining and processing condensate as claimed in claim 3 or 4, wherein a temperature sensor is provided at an outlet of the condensate outlet chamber.

6. The apparatus of claim 5, further comprising a controller electrically connected to the temperature sensor and the three-way valve.

7. The refining processing device for condensate of claim 6, wherein the control method of the three-way valve is as follows:

s1, controlling the first end and the third end of the first-stage heat exchange cavity and the second-stage heat exchange cavity to be conducted, and controlling the second end to be closed, and switching the first-stage heat exchange cavity to a heat exchange working state; the rest heat exchange cavities are in an idle state;

s2, inputting process condensate or turbine condensate into the condensate input cavity, and inputting cooling liquid into a liquid inlet pipe of the first-stage heat exchange cavity;

s3, detecting the temperature at the outlet of the condensate output cavity after a set time;

and S4, adjusting the power of the liquid inlet pump and/or controlling the states of the rest three-way valves according to the temperature, and switching one or more of the rest heat exchange cavities to a heat exchange working state.

8. The refining processing device of condensate according to claim 7, wherein the specific adjustment process of S4 is as follows:

s41, setting a second temperature threshold, a first temperature threshold slightly lower than the second temperature threshold and a third temperature threshold slightly higher than the second temperature threshold;

s42, when the temperature is lower than a first temperature threshold value, if only the first-stage heat exchange cavity is in a heat exchange working state, the power of the liquid inlet pump is reduced, otherwise, the last-stage heat exchange cavity in the heat exchange working state is switched to an idle state; when the temperature is between the first temperature threshold and the second temperature threshold, reducing the power of the liquid inlet pump; when the temperature is between the second temperature threshold and a third temperature threshold, increasing the power of the liquid inlet pump; and when the temperature is higher than a third temperature threshold value, the heat exchange cavities in the idle state are switched into a heat exchange working state in sequence.

9. The apparatus according to claim 7 or 8, wherein the predetermined period of time is 20 to 40 seconds.

10. The apparatus of claim 1, wherein the inlet conduit of the heat exchange chamber is at the bottom and the outlet conduit is at the top.

Background

In the chemical production process, according to process flow's difference, the chemical plant device often produces multiple lime set, wherein mainly includes two kinds of technology lime set and turbine lime set, and the temperature of lime set is generally more than 50 ℃, has higher heat energy, has then become chemical sewage if direct emission, and water resource and heat energy are wasted by a large amount, consequently carry out recovery processing with the lime set, satisfy boiler feed water index and just can be applied to boiler feed with the lime set, effective water economy resource.

In the treatment of condensate, the skilled person has been seeking a method for the integrated treatment of process condensate and turbine condensate, but the process condensate and turbine condensate differ in several ways: 1. the temperature difference is that the temperature of the turbine condensate is generally above 60 ℃, and the temperature of the process condensate is generally above 100 ℃; 2. distinguishing inclusion impurities; the impurities of the turbine condensate mainly include iron-containing impurities and ions, while the impurities of the process condensate mainly include iron-containing impurities and oil contamination. Therefore, how to comprehensively treat the process condensate and the turbine condensate with temperature and impurity differences is one of the problems to be solved urgently in the field.

Disclosure of Invention

The invention aims to provide refining treatment equipment for condensate, which realizes comprehensive treatment of process condensate and turbine condensate.

In order to achieve the purpose, the invention provides the following technical scheme:

a condensate refining treatment device comprises a process condensate pretreatment system, a turbine condensate pretreatment system and a desalting system;

the process condensate pretreatment system comprises a first heat exchanger, a first condensation water tank, a first iron removal filter and an activated carbon filter, and the process condensate is introduced into the desalting system after heat exchange, condensation, iron-containing impurity removal and oil stain removal are sequentially carried out on the process condensate;

the turbine condensate pretreatment system comprises a second heat exchanger, a second condensation water tank and a second iron removal filter, and the turbine condensate is subjected to heat exchange, condensation and iron-containing impurity removal in sequence and then is introduced into the desalting system;

the desalting system comprises a mixed bed and a desalting water tank; the mixed bed removes anions and cations in the process condensate and the turbine condensate and then feeds the process condensate and the turbine condensate into a desalting water tank for storage.

Further, the first heat exchanger or the second heat exchanger is a tubular heat exchanger and comprises a cylinder body, and partition plates are arranged in the cylinder body at intervals to divide the cylinder body into a plurality of cavities; the cavity body positioned at the first end of the cylinder body is a condensate input cavity which is used for inputting process condensate or turbine condensate; the cavity body positioned at the second end of the cylinder body is a condensate output cavity for outputting process condensate or turbine condensate; a multi-stage heat exchange cavity is arranged between the condensate input cavity and the condensate output cavity, and a liquid inlet pipe and a liquid outlet pipe are respectively arranged on each heat exchange cavity; a heat exchange tube bundle penetrating through all the heat exchange cavities is arranged in the barrel body, the first end of the heat exchange tube bundle is communicated with the condensate input cavity, and the second end of the heat exchange tube bundle is communicated with the condensate output cavity.

Furthermore, the liquid inlet pipe of each heat exchange cavity independently feeds liquid and is respectively connected with a liquid inlet pump.

Further, a liquid inlet pipe of the first-stage heat exchange cavity is provided with a liquid inlet pump; a three-way valve is arranged between every two adjacent heat exchange cavities, the first end of the three-way valve is connected with a liquid outlet pipe of the previous heat exchange cavity, and the second end of the three-way valve is connected with a liquid inlet pipe of the next heat exchange cavity; the three-way valve also comprises a liquid outlet main pipe, and the liquid outlet main pipe is connected with the third ends of all the three-way valves.

Furthermore, a temperature sensor is arranged at an outlet of the condensate output cavity.

Further, still include the controller, controller and temperature sensor, three-way valve electric connection.

Further, the control method of the three-way valve comprises the following steps:

s1, controlling the first end and the third end of the first-stage heat exchange cavity and the second-stage heat exchange cavity to be conducted, and controlling the second end to be closed, and switching the first-stage heat exchange cavity to a heat exchange working state; the rest heat exchange cavities are in an idle state;

s2, inputting process condensate or turbine condensate into the condensate input cavity, and inputting cooling liquid into a liquid inlet pipe of the first-stage heat exchange cavity;

s3, detecting the temperature at the outlet of the condensate output cavity after a set time;

and S4, adjusting the power of the liquid inlet pump and/or controlling the states of the rest three-way valves according to the temperature, and switching one or more of the rest heat exchange cavities to a heat exchange working state.

Further, the specific adjustment process of S4 is as follows:

s41, setting a second temperature threshold, a first temperature threshold slightly lower than the second temperature threshold and a third temperature threshold slightly higher than the second temperature threshold;

s42, when the temperature is lower than a first temperature threshold value, if only the first-stage heat exchange cavity is in a heat exchange working state, the power of the liquid inlet pump is reduced, otherwise, the last-stage heat exchange cavity in the heat exchange working state is switched to an idle state; when the temperature is between the first temperature threshold and the second temperature threshold, reducing the power of the liquid inlet pump; when the temperature is between the second temperature threshold and a third temperature threshold, increasing the power of the liquid inlet pump; and when the temperature is higher than a third temperature threshold value, the heat exchange cavities in the idle state are switched into a heat exchange working state in sequence.

Further, the prescribed period of time is 20s to 40 s.

Furthermore, a liquid inlet pipe of the heat exchange cavity is positioned at the bottom, and a liquid outlet pipe is positioned at the top.

Compared with the prior art, the invention has the beneficial effects that: the process condensate pretreatment system and the turbine condensate pretreatment system respectively carry out pretreatment of different procedures on the process condensate and the turbine condensate, so that the temperatures of the treated process condensate and the treated turbine condensate are basically consistent, iron-containing impurities and oil stains in the treated process condensate and the treated turbine condensate are removed, and then the treated process condensate and the treated turbine condensate are introduced into the desalting system to remove anions and cations, so that the comprehensive treatment of two kinds of condensates with different temperatures and impurities is realized.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of a first heat exchanger according to an embodiment of the present invention.

Fig. 3 is an internal configuration diagram of a first heat exchanger according to an embodiment of the present invention.

In the figure: 11. a first heat exchanger; 12. a first condensate tank; 13. a first iron removal filter; 14. an activated carbon filter; 21. a second heat exchanger; 22. a second condensate tank; 23. a second iron removal filter; 31. mixing the bed; 32. a desalting water tank; 110. a barrel body; 111. a partition plate; 112. a condensate input chamber; 1121. a condensate output pipe; 113. a condensate output cavity; 1131. a condensate output pipe; 114. a heat exchange cavity; 1141. a liquid inlet pipe; 1142. a liquid outlet pipe; 1143. a liquid inlet pump; 1144. a liquid outlet main pipe; 115. a three-way valve; 116. a heat exchange tube bundle.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present embodiment provides a condensate refining apparatus, which includes a process condensate pretreatment system, a turbine condensate pretreatment system, and a desalting system.

The process condensate pretreatment system comprises a first heat exchanger 11, a first condensation water tank 12, a first iron removal filter 13 and an activated carbon filter 14, and the process condensate is sequentially subjected to heat exchange, condensation, iron-containing impurity removal and oil stain removal and then is introduced into a desalting system.

The turbine condensate pretreatment system comprises a second heat exchanger 21, a second condensation water tank 22 and a second iron removal filter 23, and the turbine condensate is sequentially subjected to heat exchange, condensation and iron-containing impurity removal and then is introduced into the desalting system.

In the treatment, aiming at the characteristic that the process condensate contains oil stains, the oil stains are removed by using the activated carbon filter 14, and the impurities in the condensate output by the two pretreatment systems only leave anions and cations through the heat exchange power control of the first heat exchanger 11 and the second heat exchanger 12, and the temperature is approximately the same, so that the condensate can conveniently enter a mixing bed for uniform treatment in the later period.

The desalting system comprises a mixing bed 31 and a desalting water tank 32; the mixed bed removes anions and cations in the process condensate and the turbine condensate and then feeds the process condensate and the turbine condensate into a desalting water tank for storage.

In order to achieve approximately the same water temperature output by the first heat exchanger 11 and the second heat exchanger 12, it is necessary to control the heat exchange power of the first heat exchanger 11 and the second heat exchanger 12. The existing tubular heat exchangers generally control the flow rate of the cooling liquid only by the power of the infusion pump, and have limited conditioning efficiency and space. In order to adapt to the large-amplitude adjustment of the heat exchange power of the embodiment. The first heat exchanger 11 and the second heat exchanger 21 of the present embodiment can implement a combination of coarse adjustment and fine adjustment.

Referring to fig. 2 and 3, taking the first heat exchanger as an example, the first heat exchanger 11 is a tubular heat exchanger, and includes a cylinder 110, and partitions 111 are disposed at intervals in the cylinder 110 to partition the cylinder into a plurality of cavities. Wherein, the cavity body positioned at the first end of the cylinder body 110 is a condensate input cavity 112 for inputting condensate, and the bottom is provided with a condensate input pipe 1121; the cavity that is located stack shell 110 second end is lime set output cavity 113 for the lime set is exported, and the top is provided with lime set output tube 1131. It is worth mentioning that a temperature sensor is arranged at an outlet of the condensate output cavity 113 and used for monitoring the real-time temperature of the condensate output cavity 113. And a multi-stage heat exchange cavity 114 is arranged between the condensate input cavity 112 and the condensate output cavity 113, and each heat exchange cavity 114 is provided with a liquid inlet pipe 1141 at the bottom and a liquid outlet pipe 1142 at the top respectively for inputting and outputting cooling liquid. A plurality of heat exchange tube bundles 116 penetrating all the heat exchange cavities 114 are arranged in the barrel body 110, a first end of each heat exchange tube bundle 116 is communicated with the condensate input cavity 112, and a second end of each heat exchange tube bundle 116 is communicated with the condensate output cavity 113; the heat exchange tube bundle 116 is located at the tube wall in the heat exchange cavity 114, and the condensate exchanges heat with the cooling liquid, so that the heat is recycled.

Multistage coarse power regulation can be realized by controlling the circulation of cooling liquid in one or more of the heat exchange chambers 114, and fine power regulation can be further realized by controlling the circulation speed of the cooling liquid in the heat exchange chambers 114 (i.e. controlling the power of the liquid inlet pump).

The liquid inlet control modes of the heat exchange cavity 114 include the following two modes:

firstly, independently controlling: the liquid inlet pipe 1141 of each heat exchange cavity 114 independently feeds liquid and is respectively connected with a liquid inlet pump.

II, joint control: a liquid inlet pump 1143 is arranged on a liquid inlet pipe 1141 of the first-stage heat exchange cavity 114; a three-way valve 115 is arranged between two adjacent heat exchange cavities 114, a first end of the three-way valve 115 is connected with a liquid outlet pipe 1142 of the previous stage of heat exchange cavity, and a second end of the three-way valve 115 is connected with a liquid inlet pipe 1141 of the next stage of heat exchange cavity; and the liquid outlet manifold 1144 is further included, and the liquid outlet manifold 1144 is connected with the third ends of all the three-way valves 115.

In the second control mode, the controller is electrically connected to the temperature sensor and the three-way valve, and is configured to control a state of the three-way valve according to the real-time temperature detected by the temperature sensor.

The control method of the three-way valve comprises the following steps:

s1, controlling the first end and the third end of the first-stage heat exchange cavity and the second-stage heat exchange cavity to be conducted, and controlling the second end to be closed, and switching the first-stage heat exchange cavity to a heat exchange working state; the rest heat exchange cavities are in an idle state;

s2, inputting process condensate or turbine condensate into the condensate input cavity, and inputting cooling liquid into a liquid inlet pipe of the first-stage heat exchange cavity;

s3, detecting the temperature at the outlet of the condensate output cavity after a set time; the specified time length is set according to the requirement of a customer, and is generally 20s to 40s, and is preferably 30 s;

and S4, adjusting the power of the liquid inlet pump and/or controlling the states of the rest three-way valves according to the temperature, and switching one or more of the rest heat exchange cavities to a heat exchange working state. The specific adjustment process is as follows:

s41, setting a second temperature threshold, a first temperature threshold slightly lower than the second temperature threshold and a third temperature threshold slightly higher than the second temperature threshold;

s42, when the temperature is lower than a first temperature threshold value, if only the first-stage heat exchange cavity is in a heat exchange working state, the power of the liquid inlet pump is reduced, otherwise, the last-stage heat exchange cavity in the heat exchange working state is switched to an idle state; when the temperature is between the first temperature threshold and the second temperature threshold, reducing the power of the liquid inlet pump; when the temperature is between the second temperature threshold and a third temperature threshold, increasing the power of the liquid inlet pump; and when the temperature is higher than a third temperature threshold value, the heat exchange cavities in the idle state are switched into a heat exchange working state in sequence.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.