CN212559526U

CN212559526U - Sewage evaporation steam treatment system

Info

Publication number: CN212559526U
Application number: CN202020888360.0U
Authority: CN
Inventors: 严嘉明; 陈松
Original assignee: Vital Materials Co Ltd
Current assignee: Anhui Zhongfei Technology Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-02-19
Anticipated expiration: 2030-05-22

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a sewage evaporation steam treatment system, which comprises a steam condensation loop, a cooling circulation loop and a heat exchanger, wherein one end of the steam condensation loop is communicated with a sewage evaporation device, the other end of the steam condensation loop is provided with a vacuum device, the steam condensation loop and the cooling circulation loop are respectively connected with the heat exchanger, the steam condensation loop is provided with a collecting device used for collecting condensed water between the vacuum device and the heat exchanger, after the sewage evaporation concentration of the sewage evaporation device, the steam condensation loop is opened, the vacuum device sucks the evaporation steam into the steam condensation loop, the heat exchanger leads the evaporation steam with high temperature to be cooled and condensed into condensed water, finally the condensed water flows into the collecting device for recycling, after the volume of the sewage in the sewage evaporation device is reduced to a designated volume, the sewage needing to be evaporated can be continuously input, continuous circulation treatment is realized, the treatment efficiency of sewage is ensured, and zero emission of high-temperature evaporation steam is realized.

Description

Sewage evaporation steam treatment system

Technical Field

The utility model relates to a sewage treatment technical field especially relates to a sewage evaporation steam treatment system.

Background

With the rapid development of industry, environmental pollution is becoming more severe, and among them, sewage treatment is important among many environmental problems. The sewage comprises industrial sewage and domestic sewage, and if the sewage cannot be completely purified, the sewage is directly discharged and can enter a water circulation system of the earth again, so that the ecological environment is destroyed, and the sewage also enters a human body to influence the health of human beings.

The most effective method for performing harmless treatment and recycling on the industrial sewage at the present stage is to adopt a continuous sewage evaporation and concentration system for treatment, wherein the industrial sewage is firstly subjected to evaporation treatment to concentrate the industrial sewage, and is subjected to burning essence landfill treatment through a series of causticization reactions after reaching a certain concentration and crystallizing. However, the continuous evaporation and concentration process of sewage has a large amount of waste gas emission problems, and the prior art does not meet the treatment requirements of waste gas generated in the continuous evaporation and concentration process of large-scale sewage, so that a large amount of steam polluting the atmospheric environment is also emitted in the sewage treatment process, and the requirement of environmental protection emission is not met. Most of the existing sewage evaporation treatment equipment mainly comprises MVR-like equipment, the cost of one-time investment is high and can reach about 1000 ten thousand, common micro-scale chemical enterprises cannot invest, and the environmental protection form is severe, so that the development of the enterprises is severely limited.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: how to recycle the evaporation steam generated in the continuous evaporation and concentration process of the sewage, the zero discharge of the steam is realized, and the sewage treatment investment cost of micro chemical enterprises is greatly reduced.

In order to solve the technical problem, the utility model provides a sewage evaporation vapour processing system, including steam condensation return circuit, cooling circulation return circuit and heat exchanger, the one end and the sewage evaporation plant of steam condensation return circuit communicate with each other, the other end of steam condensation return circuit is equipped with vacuum apparatus, steam condensation return circuit with cooling circulation return circuit respectively with the heat exchanger is connected, so that the evaporation vapour is in the inside heat transfer of heat exchanger forms the comdenstion water, steam condensation return circuit is in vacuum apparatus with be equipped with the collection device who is used for collecting the comdenstion water between the heat exchanger.

Preferably, the collecting device comprises a plurality of collecting tanks and a first water storage tank for storing condensed water, each collecting tank is arranged on the steam condensation loop, and each collecting tank is respectively communicated with the first water storage tank.

Preferably, each of the collection tanks is a vacuum tank, and a drain pipe of each of the collection tanks is located below a liquid level of the first water storage tank.

Preferably, the collecting tanks are sequentially communicated in series.

Preferably, a liquid level meter is arranged on the side surface of each collecting tank.

Preferably, the vacuum device comprises a vacuum pump and a second water storage tank, the vacuum pump is connected with the steam condensation loop, and the vacuum pump is communicated with the second water storage tank.

Preferably, the system further comprises a delivery pump, the first water storage tank and the second water storage tank are respectively communicated with a water inlet of the delivery pump, and a water outlet of the delivery pump is communicated with a workshop recovery device.

Preferably, a cooling water pool and a circulating pump are arranged on the cooling circulation loop, the cooling water pool is connected with two ends of the cooling circulation loop, and the circulating pump is located between the cooling water pool and the heat exchanger.

Preferably, the cooling circulation loop is provided with a water supply pipeline communicated with the vacuum device.

Preferably, the cooling circulation loop is communicated with an external tap water pipeline.

Compared with the prior art, the utility model provides a sewage evaporation steam treatment system, its beneficial effect lies in:

in the utility model, the steam condensation loop is connected with the sewage evaporation device, and after the sewage of the sewage evaporation device is evaporated and concentrated, the steam condensation loop is opened, vacuum negative pressure is formed under the action of the vacuum device, evaporation steam is sucked into the steam condensation loop and exchanges heat with the cooling circulation loop in the heat exchanger, so that the high-temperature evaporation steam is cooled and condensed to become condensate water, and finally the condensate water flows into the collecting device for recycling, the evaporation steam condensation process and the sewage evaporation concentration process are performed in a crossed way, when the volume of the sewage in the sewage evaporation device is reduced to a specified volume, the method has the advantages of continuously inputting the sewage to be evaporated, realizing continuous circulating treatment, ensuring the treatment efficiency of the sewage, saving energy, protecting environment, realizing zero emission of high-temperature evaporation steam and meeting the national emission standard.

Drawings

FIG. 1 is a schematic structural view of an evaporation steam treatment system for sewage according to a preferred embodiment of the present invention.

In the figure: 1. a vapor condensation loop; 2. a cooling circulation loop; 3. a heat exchanger; 4. a sewage evaporation device; 5. a collection tank; 6. a first water storage tank; 7. a liquid level meter; 8. a first collection line; 9. a second collection line; 10. a vacuum pump; 11. a second water storage tank; 12. a delivery pump; 13. a workshop recovery device; 14. a cooling water pool; 15. a circulation pump; 16. a water supply line; 17. a tap water line; 18. a first control valve; 19. a second control valve; 20. a third control valve; 21. a fourth control valve; 22. a fifth control valve; 23. a sixth control valve; 24. a seventh control valve; 25. an eighth control valve; 26. a ninth control valve; 27. a tenth control valve; 28. an eleventh control valve; 29. a twelfth control valve; 30. a thirteenth control valve; 31. a fourteenth control valve; 32. a fifteenth control valve; 33. a sixteenth control valve; 34. a seventeenth control valve; 35. an eighteenth control valve; 36. a nineteenth control valve; 37. a twentieth control valve; 38. a twenty-first control valve; 39. a twenty-second control valve; 40. a twentieth control valve; 41. a twenty-fourth control valve.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "connected," "connected," and "fixed" used in the present invention should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral body; the connection can be mechanical connection or welding connection; 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1, the preferred embodiment of the present invention provides a sewage evaporation steam treatment system, which comprises a steam condensation loop 1, a cooling circulation loop 2 and a heat exchanger 3, wherein one end of the steam condensation loop 1 is communicated with a sewage evaporation device 4, the other end of the steam condensation loop 1 is provided with a vacuum device, the steam condensation loop 1 and the cooling circulation loop 2 are respectively connected with the heat exchanger 3, so that the evaporation steam is in the heat exchange inside the heat exchanger 3 to form condensed water, and the steam condensation loop 1 is provided with a collecting device for collecting the condensed water between the vacuum device and the heat exchanger 3.

Based on the above technical characteristics, the sewage evaporation steam treatment system connects the steam condensation loop 1 to the sewage evaporation device 4, after the sewage of the sewage evaporation device 4 is evaporated and concentrated, the steam condensation loop 1 is opened, vacuum negative pressure is formed under the action of the vacuum device, the evaporation steam is sucked into the steam condensation loop 1, the evaporation steam completes heat exchange with the cooling circulation loop 2 in the heat exchanger 3, so that the high-temperature evaporation steam is cooled and condensed into condensed water, finally the condensed water flows into the collection device for recycling, the evaporation steam condensation process and the sewage evaporation and concentration process are performed in a cross way, when the volume of the sewage in the sewage evaporation device 4 is reduced to a specified volume, the sewage to be evaporated can be continuously input, continuous circulation treatment is realized, the sewage treatment efficiency is ensured, energy conservation and environmental protection are achieved, the zero emission of high-temperature evaporation steam is realized, and the national emission standard is met.

In this embodiment, the collecting device includes a plurality of collecting tanks 5 and a first water storage tank 6 for storing condensed water, each collecting tank 5 is disposed on the steam condensation loop 1, each collecting tank 5 is respectively communicated with the first water storage tank 6, and it is impossible to ensure that all the evaporated steam is condensed in the heat exchanger 3, so that the condensed water and the evaporated steam which is not completely condensed enter the collecting tanks 5 together for continuous condensation, and the condensed water is stored in the first water storage tank 6.

Furthermore, each collecting tank 5 is a vacuum tank, and the drain pipe of each collecting tank 5 is located below the liquid level of the first water storage tank 6, so that the collecting tanks 5 are sealed, and air is prevented from entering the collecting tanks 5, so that the steam condensation loop 1 is ensured to be in a vacuum negative pressure state, and the purpose of sucking high-temperature evaporation steam in the sewage evaporation device 4 into the heat exchanger 3 is achieved.

The side of each collecting tank 5 is provided with a liquid level meter 7, so that the liquid level height in the tank can be observed at any time, the liquid level in the collecting tank 5 is adjusted by controlling and adjusting the opening degree of the fourth control valve 21, the liquid level is ensured to be kept at a normal liquid level height, the liquid level height is generally between 1/5 and 1/3 of the total height of the collecting tank 5, and the vacuum degree of the collecting tank 5 is ensured.

Furthermore, each collecting tank 5 is sequentially communicated in series, the first collecting tank 5 mainly collects condensed water formed by the heat exchanger 3, incompletely condensed water vapor flows into other collecting tanks 5 to be condensed into condensed water, the condensed water of each collecting tank 5 flows to the first water storage tank 6 to be stored, and a small amount of water vapor can flow into the vacuum device, so that the water vapor is guaranteed to have a better condensation effect.

In addition, a first collecting pipeline 8 leading to the first water storage tank 6 is arranged on a pipeline between the heat exchanger 3 and the sewage evaporation device 4, so that condensed water formed in the steam condensation loop 1 is collected in advance, and the treatment pressure of the heat exchanger 3 is reduced. A second collecting pipeline 9 leading to the first water storage tank 6 is arranged on a pipeline between the heat exchanger 3 and the collecting device, partial condensed water formed in the heat exchanger 3 is collected in advance, and the processing pressure of the collecting device is reduced.

The heat exchanger 3 is a plate heat exchanger 3 (the heat exchange area is 20-35 square meters), and is mainly formed by stacking a plurality of layers of evaporation plates of the plate heat exchanger 3, evaporation steam forms a continuous laminar gas-liquid film under and above the plurality of layers of evaporation plates in the plate heat exchanger 3, and finally forms clean condensed water after being cooled by the plurality of layers of cooling plates, and the cooling circulation loop 2 takes away redundant temperature of the evaporation plates and finally flows back to the cooling water tank 14. When the heat exchanger 3 is installed, a certain inclination is kept, and condensed water condensed by the evaporated steam is ensured not to flow back and flows to the collecting device.

In this embodiment, vacuum pump 10 and second water storage tank 11 are drawn together to vacuum device, vacuum pump 10 with steam condensation return circuit 1 is connected, vacuum pump 10 with second water storage tank 11 is linked together, and when normal operating condition, the liquid level of second water storage tank 11 need not to surpass vacuum pump 10's back flow is in order to guarantee vacuum pump 10 forms vacuum negative pressure state and sucks steam, and in addition, second water storage tank 11 can also hold the steam that minute quantity flowed into vacuum device, guarantees the zero release of steam.

In this embodiment, the processing system further comprises a delivery pump 12, the first water storage tank 6 and the second water storage tank 11 are respectively communicated with a water inlet of the delivery pump 12, a water outlet of the delivery pump 12 is communicated with a workshop recovery device 13, the content of harmful substances in the condensed water formed by water vapor is low, the stored condensed water is recovered to the workshop recovery device 13 by the delivery pump 12 for reasonable utilization, and the condensed water can be discharged without being treated again, so that the national primary discharge standard is met. When the first water storage tank 6 and/or the second water storage tank 11 reach a certain volume, the condensed water is pumped to a workshop through the delivery pump 12 for recycling, so that the purpose of recycling the condensed water while treating sewage is achieved.

In this embodiment, the cooling circulation loop 2 is provided with a cooling water tank 14 and a circulation pump 15, the cooling water tank 14 is connected to two ends of the cooling circulation loop 2, and the circulation pump 15 is located between the cooling water tank 14 and the heat exchanger 3.

In this embodiment, the cooling circulation loop 2 is provided with a water supply pipeline 16 communicated with the vacuum device, one end of the water supply pipeline 16 is connected with the water outlet of the circulation pump 15, and the other end of the water supply pipeline 16 is communicated with the second water storage tank 11 and the vacuum pump 10, so as to ensure that when the system is started, enough water can be provided for the second water storage tank 11, and the vacuum pump 10 is ensured to be started and operated to form a vacuum negative pressure state. In addition, the water outlet of the delivery pump 12 is also communicated with the water supply pipeline 16, and the delivery pump 12 is used for providing circulating cooling water for the vacuum pump. When the delivery pump 12 fails and cannot work continuously, the water supply pipeline 16 is used for supplying cooling water to the vacuum pump 10, and the normal operation of the vacuum pump 10 is ensured.

In this embodiment, cooling circulation loop 2 communicates with each other with external running water pipeline 17, and external running water pipeline 17 sets up water supply line 16 with between the circulating pump 15, can for water supply line 16 provides the running water, and it is right to be convenient for add water to second water storage tank 11, makes the liquid level of second water storage tank 11 submerges vacuum pump 10's back flow, in order to guarantee vacuum pump 10 forms the vacuum negative pressure state and pumps steam. The external tap water pipeline 17 is also communicated with the first water storage tank 6 and the cooling water pool 14, and directly serves to add water into the first water storage tank 6 and the cooling water pool 14 so as to control the liquid level of the first water storage tank 6 and the cooling water pool 14.

In this embodiment, the sewage evaporation device 4 comprises a reaction kettle, 3 to 8 cubes of sewage to be evaporated are loaded in the reaction kettle, high-temperature steam of 0.1 to 0.6Mpa (80 to 180 ℃) is continuously introduced into the jacket of the reaction kettle through a pipeline, heating and stirring the sewage to be treated in the reaction kettle for reaction, fully exchanging heat between the sewage and steam in a jacket in the stirring process, adding negative pressure to reduce the boiling point of the sewage, generating a large amount of high-temperature steam of 60-90 ℃ in the reaction kettle, opening a corrosion-resistant high-temperature-resistant valve, pumping the high-temperature steam away by a vacuum device at the rear end for condensation treatment, gradually reducing the volume of the sewage to be treated in the reaction kettle, and after the volume of the sewage in the reaction kettle is reduced to a specified volume, the sewage to be evaporated can be continuously input, so that the circular production treatment is realized, and the aim of continuous treatment is fulfilled.

Wherein, in all evaporation process of sewage evaporation plant 4, inside mixing system is opened, has guaranteed to answer high-temperature water in the cauldron under the negative pressure condition, volatilizees fast, through the sewage evaporation treatment of certain volume back, and the remaining pulpiness material in bottom utilizes splitter to separate out solid and a small amount of liquid, and the solid can be used as the by-product and put into production once more, and liquid can continue evaporation treatment after short-term storage to guarantee zero release, zero pollution.

Further, the vacuum pump 10 and the collecting tank 5 are used for generating negative pressure, high-temperature water vapor generated in the reaction kettle is pumped into the heat exchanger 3 in a negative pressure mode, the high-temperature water vapor is released and cooled in the heat exchanger 3 to become condensate water, the condensate water is collected by the collecting tank 5 and discharged to the first water storage tank 6, the clean condensate water can be recycled in a workshop, in order to accelerate the condensation efficiency of the high-temperature water vapor in the heat exchanger 3, the circulating pump 15 is used for continuously pumping cooling water from the cooling water pool 14 into the water inlet of the heat exchanger 3, and then the cooling water returns back to the cooling water pool 14 through the water outlet of the heat exchanger 3 to form cooling water circulation, and the plate-type heat exchanger 3 exchanges heat with the pumped high-temperature water vapor for condensation, so that the evaporation steam treatment system of the continuous sewage evaporation and concentration system is realized.

In this embodiment, a plurality of control valves are respectively arranged on the steam condensation loop 1 and the cooling circulation loop 2 to control the opening and closing of a pipeline, a first control valve 18 is arranged on a pipeline between the heat exchanger 3 and the sewage evaporation device 4, the first control valve 18 is a corrosion-resistant and high-temperature-resistant valve, the pipeline is a glass fiber reinforced plastic steam pipeline, the diameter of the pipeline is more than 2 times of that of an inlet pipe of the plate heat exchanger 3, and in order to reduce the temperature loss of the steam and meet the requirement of sufficient air supply quantity; the first collecting pipeline 8 is provided with a second control valve 19, the second collecting pipeline 9 is provided with a third control valve 20, the drain pipe of the collecting tank 5 is provided with a fourth control valve 21, the connecting pipe between the collecting tanks 5 is provided with a fifth control valve 22, a sixth control valve 23 is arranged between the collecting tank 5 and the vacuum pump 10, a seventh control valve 24 is arranged between the vacuum pump 10 and the second water storage tank 11, an eighth control valve 25 is arranged between the delivery pump 12 and the first water storage tank 6, a ninth control valve 26 is arranged between the delivery pump 12 and the second water storage tank 11, a tenth control valve 27 is arranged between the delivery pump 12 and the workshop recycling device 13, the cooling circulation loop 2 is provided with an eleventh control valve 28 at the bottom of the cooling water tank 14, a twelfth control valve 29 and a thirteenth control valve 30 are arranged between the circulation pump 15 and the heat exchanger 3, the water supply pipeline 16 is located between the twelfth control valve 29 and the thirteenth control valve 30, the water inlet of the circulating pump 15 is provided with a fourteenth control valve 31, the water outlet of the circulating pump 15 is provided with a fifteenth control valve 32, the external tap water pipeline 17 is located between the twelfth control valve 29 and the fifteenth control valve 32, the water supply pipeline 16 is respectively provided with a sixteenth control valve 33, a seventeenth control valve 34, an eighteenth control valve 35 and a nineteenth control valve 36, the heat exchanger 3 is provided with a twentieth control valve 37 when flowing back to the cooling water tank 14, a twenty-first control valve 38 is arranged between the water outlet of the delivery pump 12 and the water supply pipeline 16, a twenty-second control valve 39 is arranged between the external tap water pipeline 17 and the cooling circulation loop 1, and a twenty-third control valve 40 is arranged between the external tap water pipeline 17 and the first water storage tank 6, a twenty-fourth control valve 41 is arranged between the external tap water pipeline 17 and the cooling water pool 14.

The utility model discloses a processing system's theory of operation is: the twenty-fourth control valve 41 is opened in sequence, and after the water in the cooling water tank 14 is added to the position 300-600 mm away from the top surface of the tank, the twenty-fourth control valve 41 is closed. The twelfth control valve 29, the thirteenth control valve 30, the twentieth control valve 37, the fourteenth control valve 31, the fifteenth control valve 32, the first control valve 18, the fifth control valve 22, the sixth control valve 23, the seventh control valve 24, the ninth control valve 26, the seventeenth control valve 34, the eighteenth control valve 35, the nineteenth control valve 36, and the twenty-first control valve 38 are opened in this order, and the sixteenth control valve 33, the second control valve 19, the third control valve 20, the fourth control valve 21, the eighth control valve 25, the tenth control valve 27, and the twenty-second control valve 39 are closed. Opening the twentieth control valve 40 to add water into the first water storage tank 6 (when in use, ensuring that 1-1.5 m is in the first water storage tank 6³The volume of water or the liquid level is 0.6m) so that the liquid level of the first water storage tank 6 is lower than the return pipe of the vacuum pump 10, and the twenty-third control valve 40 is closed after the liquid level of the first water storage tank 6 reaches the requirement. And starting the circulating pump 15, and enabling cooling water of the cooling circulating loop 2 to act on the heat exchanger 3 and flow back to the cooling pool 14 (the flow of inlet water and return water can reach 25-50 m3/h) to form cooling water circulation. And starting the vacuum pump 10 to vacuumize the collecting tank 5 into a negative pressure state. After cooling water circulation and vacuum negative pressure state are adjusted, the sewage evaporation device 4 is started, 3 to 8 cubes of sewage to be evaporated are added into the reaction kettle while stirring, after the sewage is added, a steam valve corresponding to the reaction kettle is opened, high-temperature steam of 0.1 to 0.6Mpa (80 to 180 ℃) provided by a workshop is continuously introduced into a jacket of the reaction kettle through a pipeline to heat and stir the sewage to be treated in the reaction kettle, the sewage and steam heat in the jacket are fully exchanged with heat and negative pressure in the stirring process to reduce the boiling point of the sewage, and a large amount of high-temperature steam of 60 to 90 ℃ is generated in the reaction kettleAnd (4) discharging the water vapor (the clean condensed water condensed after the high-temperature steam for heating the sewage releases heat) to the outside through a drain valve arranged at the lower part of the reaction kettle. Through the first control valve 18, the water vapor evaporated from the sewage is pumped into the heat exchanger 3 by the steam condensation loop 1 in a negative pressure vacuum state for cooling and condensation, the condensed water condensed by heat exchange of the heat exchanger 3 and the water vapor which is not completely condensed sequentially flow into the collecting tank 5, the liquid level height inside the collecting tank 5 is observed by a liquid level meter 7 on the side surface of the collecting tank 5, when the liquid level height reaches 50% -60% of the collecting tank 5, the fourth control valve 21 of the collecting tank 5 is slightly opened, the size of the fourth control valve 21 is controlled, the flow rate of the condensed water is reduced, the liquid level height inside the collecting tank 5 is ensured to be between 1/10 and 1/5 of the total height inside the collecting tank for a long time, so that a part of the condensed water formed in the collecting tank 5 flows into the first water storage tank 6, and a small amount of the sewage vapor which is not completely condensed is pumped by the vacuum pump 10 and flows into the second water storage tank 11, through the sewage evaporation of a period of time, the liquid in first water storage tank 6 and the second water storage tank 11 is also more and more, and when the liquid level height reached 80% -90% of total height in the storage tank, open eighth control valve 25 or ninth control valve 26, open tenth control valve 27, open delivery pump 12, send the comdenstion water to workshop recovery unit 13 recycle, the solution in first water storage tank 6 and the second water storage tank 11 can not shift the recovery simultaneously, can stagger the time and retrieve. Wherein, the fourth control valve 21 is opened on the premise that the first water storage tank 6 has a sufficient water storage amount to be submerged in the drain pipe of the collection tank 5, preventing air from entering. The volume in the reaction kettle is continuously reduced, the sewage to be evaporated can be continuously input, continuous sewage evaporation and concentration are realized, water vapor formed by the sewage is condensed into condensed water, and finally the condensed water is recycled and reasonably utilized.

The second water storage tank 11 is important in that it can collect a very small amount of sewage vapor water which is not completely condensed, the collected cooling water can be pumped by the delivery pump 12 to be used as cooling circulating water for the vacuum pump 10, and the incomplete vapor condensed water can be sent to the workshop recycling device 13 for recycling. If the delivery pump 12 fails, the system cannot continue to work, the delivery pump 12, the ninth control valve 26, the tenth control valve 27, the nineteenth control valve 36, the twenty-first control valve 38 and the seventeenth control valve 34 can be closed, the eighteenth control valve 35 is opened, the sixteenth control valve 33 is opened, the cooling circulation loop 2 can also provide cooling water for the vacuum pump 10, and the normal operation of the vacuum pump 10 is ensured through double guarantee.

The utility model discloses a sewage evaporation steam treatment system's investment cost ratio is lower, is fit for being used for microminiature chemical industry enterprise's continuous sewage evaporation equipment, also is applicable to the continuous sewage treatment device of certain difficult processing sewage of large-scale chemical industry enterprise. Because the sewage evaporation device 4, the heat exchanger 3, the collection tank 5, each pipeline, each control valve and the like are in contact with the gas evaporated by the sewage, all the components can be made of 304 stainless steel, 316L stainless steel, Hastelloy C276, industrial pure titanium TA1, industrial pure titanium TA2 and the like, thereby meeting the treatment requirements of sewage with different pH values. Moreover, the size of the heat exchange area of the heat exchanger 3, the specifications of a connected pipeline, a control valve and the like can be changed according to the size of the evaporation treatment capacity and the evaporation duration, the range of the heat exchange area can be 3-1000 square meters, and the universality of the treatment system is greatly improved.

To sum up, the utility model discloses foretell embodiment provides a sewage evaporation vapour processing system is through utilizing high temperature evaporation and steam condensation principle, the evaporation vapour condensation with the continuous evaporative concentration of sewage becomes the comdenstion water that harmful substance content is low, reasonable recycle, after all valves and pumps are opened in proper order, need not personnel's operation, can realize continuous sewage evaporative concentration and evaporation vapour condensation recovery function, the process is simple, the treatment cost is low, the energy consumption is low, maintain advantages such as operation simple and convenient, the sewage final product of processing is the comdenstion water that harmful substance content is low, these comdenstion waters can be used as the material water of throwing in this car or other workshops, thereby the water cost has been reduced, real zero release pollutant that can be realized, can not cause any pollution to atmosphere or soil environment.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. The sewage evaporation steam treatment system is characterized by comprising a steam condensation loop, a cooling circulation loop and a heat exchanger, wherein one end of the steam condensation loop is communicated with a sewage evaporation device, the other end of the steam condensation loop is provided with a vacuum device, the steam condensation loop and the cooling circulation loop are respectively connected with the heat exchanger so that evaporation steam exchanges heat inside the heat exchanger to form condensed water, and a collecting device for collecting the condensed water is arranged between the vacuum device and the heat exchanger in the steam condensation loop.

2. The sewage evaporation steam treatment system of claim 1, wherein the collecting device comprises a plurality of collecting tanks and a first water storage tank for storing condensed water, each collecting tank is arranged on the steam condensation loop, and each collecting tank is respectively communicated with the first water storage tank.

3. The sewage evaporation steam treatment system of claim 2, wherein each of the collection tanks is a vacuum tank, and a drain pipe of each of the collection tanks is located below a liquid level of the first water storage tank.

4. The sewage evaporation steam treatment system of claim 2, wherein each of the collection tanks are in serial communication in sequence.

5. The sewage evaporation steam treatment system of claim 2, wherein a liquid level meter is disposed on a side surface of each collection tank.

6. The wastewater vapor treatment system according to claim 2, wherein the vacuum device comprises a vacuum pump and a second water storage tank, the vacuum pump is connected with the vapor condensation loop, and the vacuum pump is communicated with the second water storage tank.

7. The sewage evaporation steam treatment system of claim 6, further comprising a delivery pump, wherein the first water storage tank and the second water storage tank are respectively communicated with a water inlet of the delivery pump, and a water outlet of the delivery pump is communicated with a workshop recycling device.

8. The sewage evaporation steam treatment system according to any one of claims 1 to 7, wherein a cooling water tank and a circulating pump are arranged on the cooling circulation loop, the cooling water tank is connected with two ends of the cooling circulation loop, and the circulating pump is positioned between the cooling water tank and the heat exchanger.

9. The evaporative steam treatment system for wastewater of claim 8, wherein the cooling circuit has a water supply line in communication with the vacuum device.

10. The evaporative steam treatment system for wastewater of claim 8, wherein the cooling circulation loop is in communication with an external tap water line.