1. A constant-pressure flushing device coupled in a salt separation crystallization system is characterized by comprising an evaporation condensate water tank, a high-pressure water pump and a constant-pressure water tank; the evaporation condensed water tank, the high-pressure water pump and the constant-pressure water tank are communicated in sequence through pipelines;

the evaporation condensed water tank is communicated with an external evaporation water production system;

the high-pressure water pump is used for pumping high-temperature hot water in the evaporation condensate water tank into the constant-pressure water tank;

the bottom of the constant-pressure water tank is connected with a plurality of nozzles through pipelines; the constant pressure water tank is provided with a pressure transmitter, and the pressure transmitter is in signal connection with an external terminal system;

and valves are arranged on the pipeline connected between the evaporation condensate water tank and the high-pressure water pump and the pipeline connected between the high-pressure water pump and the constant-pressure water tank.

2. The constant-pressure flushing device coupled to a salt separation and crystallization system of claim 1, wherein a liquid level transmitter is arranged on the evaporation and condensation water tank, and the liquid level transmitter is in signal connection with an external terminal system.

3. The constant pressure flushing device coupled to a salt separation crystallization system of claim 1, wherein the outside surfaces of the evaporative condensate water tank and the constant pressure water tank are provided with heat insulating layers.

4. The constant-pressure flushing device coupled to the salt separation and crystallization system as claimed in any one of claims 1 to 3, wherein a motor frequency converter is arranged on the high-pressure water pump.

5. The constant pressure flushing device coupled to the salt separation and crystallization system of any one of claims 1 to 3, wherein the pressure transmitter is provided with a transmitter root valve.

6. The constant pressure flushing device coupled to the salt separation and crystallization system of claim 5, wherein the constant pressure water tank is further provided with an on-site pressure gauge, and the on-site pressure gauge is provided with an on-site gauge root valve.

7. The constant-pressure flushing device coupled to the salt separation and crystallization system as claimed in any one of claims 1 to 3, wherein a one-way check valve is further disposed on a pipeline connecting the high-pressure water pump and the constant-pressure water tank.

Background

The zero discharge of the high-salt industrial wastewater is realized, namely, the wastewater, sewage, clean sewage and the like generated in the production process are treated and then all recycled, and no wastewater is discharged to the outside; meanwhile, the salt in the wastewater is recycled after concentration, separation and crystallization treatment, so that the discharge of solid waste is reduced to the maximum extent. At present, the domestic salt separation technology mainly comprises the following steps: the salt separation by nanofiltration, the salt separation by a hot method, the salt separation by a cold and hot method and the salt separation technologies are combined. The nanofiltration salt separation is realized by utilizing the south-of-the-way effect and the pore size screening principle of a nanofiltration membrane to separate monovalent salt and divalent salt in the concentrated brine.

The recycling of waste water and waste salt is the key of environmental protection, evaporation is the most important subsystem in a salt separation crystallization system, and each salt separation crystallization project can be matched with 3 to 5 sets of evaporators. And the normal operation of the system is seriously affected by the blockage of pipelines, equipment and the like in the evaporator system. The hazard after plugging is great and a great deal of manual handling is required. In the conventional evaporation process, common process water and raw steam are mostly adopted by companies, so that on one hand, extra energy consumption is caused; the flushing and blocking effect is inferior to the high-pressure flushing water of the device; in addition, the steam flushing and blocking can bring about the phenomenon of water hammer and the risk of scalding. The pressure of the process water is not sufficient.

Disclosure of Invention

The invention aims to provide a constant-pressure flushing device coupled in a salt separation crystallization system, which is used for evaporating high-temperature hot water generated in a crystallization process and forming a strand of high-pressure, high-temperature and aqueous solution by adopting the constant-pressure flushing device so as to treat the working condition of blockage.

In order to achieve the aim of the invention, the constant-pressure flushing device coupled in the salt separation crystallization system comprises an evaporation condensate water tank, a high-pressure water pump and a constant-pressure water tank; the evaporation condensed water tank, the high-pressure water pump and the constant-pressure water tank are communicated in sequence through pipelines;

the evaporation condensed water tank is communicated with an external evaporation water production system;

the high-pressure water pump is used for pumping high-temperature hot water in the evaporation condensate water tank into the constant-pressure water tank;

the bottom of the constant-pressure water tank is connected with a plurality of nozzles through pipelines; the constant pressure water tank is provided with a pressure transmitter, and the pressure transmitter is in signal connection with an external terminal system;

and valves are arranged on the pipeline connected between the evaporation condensate water tank and the high-pressure water pump and the pipeline connected between the high-pressure water pump and the constant-pressure water tank.

Preferably, a liquid level transmitter is arranged on the evaporation and condensation water tank and is in signal connection with an external terminal system.

Preferably, the outer surfaces of the evaporation condensation water tank and the constant pressure water tank are both provided with heat insulation layers.

Preferably, a motor frequency converter is arranged on the high-pressure water pump.

Preferably, a transmitter root valve is arranged on the pressure transmitter.

Preferably, the constant-pressure water tank is further provided with an on-site pressure gauge, and the on-site pressure gauge is provided with an on-site gauge root valve.

Preferably, a one-way check valve is further arranged on a pipeline connecting the high-pressure water pump and the constant-pressure water tank.

Compared with the prior art, the constant-pressure flushing device coupled in the salt separation crystallization system has the following advantages that:

(1) the flushing water formed by the device has the advantages of high-pressure kinetic energy, water solution solubility, high-temperature hot melting and the like, and the advantages are favorable for the effect of flushing and blocking;

(2) the evaporation condensation water tank is matched with a liquid level transmitter to realize the liquid level monitoring of the water tank; the motor frequency converter realizes the remote monitoring of the constant pressure water and the pressure of the constant pressure water tank, and the constant pressure water tank can be combined into quantitative constant pressure washing water;

(3) simple structure, safety and reliability.

Drawings

FIG. 1 is a schematic structural diagram of a constant pressure flushing device coupled to a salt separation crystallization system according to this embodiment.

Wherein, 1-evaporating a condensed water tank; 2-a high pressure water pump; 3-constant pressure water tank; 4-a pressure transmitter; 5-transmitter root valve; 6-local pressure gauge; 7-in situ surface root valve; 8-a liquid level transmitter; 9-one-way check valve.

Detailed Description

The invention is further described below with reference to the following figures and specific examples.

Examples

As shown in figure 1, a constant pressure flushing device coupled in a salt separation crystallization system comprises an evaporation condensate water tank 1, a high pressure water pump 2 and a constant pressure water tank 3; the evaporation condensation water tank 1, the high-pressure water pump 2 and the constant-pressure water tank 3 are communicated in sequence through pipelines.

The evaporation condensate water tank 1 is communicated with an external evaporation water production system and stores high-temperature hot water generated by the evaporation water production system.

The high-pressure water pump 2 is used for pumping high-temperature hot water in the evaporation condensation water tank 1 to the constant-pressure water tank, preferably, a motor frequency converter is arranged on the high-pressure water pump 2, and the pressure of the high-pressure water pump 2 is controlled through the motor frequency converter.

The bottom of the constant-pressure water tank 3 is connected with a plurality of nozzles through pipelines; and the constant-pressure water tank 3 is provided with a pressure transmitter 4, and the pressure transmitter 4 is in signal connection with an external terminal system. So set up, make things convenient for the water pressure in the remote monitoring constant voltage water pitcher 3. Be equipped with changer root valve 5 on pressure transmitter 4, after using for a long time, conveniently change or maintain pressure transmitter. In order to facilitate the detection of the accuracy of the pressure value detected by the pressure transmitter, the constant pressure water tank 3 is also provided with a local pressure gauge 6, and the local pressure gauge 6 is provided with a local gauge root valve 7.

And valves are arranged on the pipeline connected between the evaporation condensate water tank 1 and the high-pressure water pump 2 and the pipeline connected between the high-pressure water pump 2 and the constant-pressure water tank 3. Further, in order to prevent the backflow of high-temperature hot water and damage the high-pressure water pump, the high-pressure water pump 2 and the pipeline connected with the constant-pressure water tank 3 are further provided with a one-way check valve 9, so that the high-temperature hot water in the pipeline is effectively prevented from flowing back to the high-pressure water pump.

In order to conveniently detect the water level of high-temperature hot water in the evaporation condensation water tank 1, a liquid level transmitter 8 is arranged on the evaporation condensation water tank 1, the liquid level transmitter 8 is in signal connection with an external terminal system, and the arrangement is convenient for remotely detecting the water level in the evaporation condensation water tank.

Further, the surface of evaporation condensation water pitcher 1 and constant pressure water pitcher 3 all is equipped with the heat insulation layer, prevents the too fast of heat loss on the one hand, and on the other hand is scalded when preventing the staff operation.

In the description of the present specification, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of describing the technical solutions of the present patent and for simplification of the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present patent application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this patent application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this specification, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present specification can be understood by those of ordinary skill in the art as appropriate.

In this specification, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.