Single-effect and double-effect combined evaporation system for sewage pretreatment
Through the design of a combination of one-effect and two-effect combination evaporation system and detection valve, the scale accumulation and corrosion problems of equipment in high-salt wastewater treatment are solved, and efficient high-salt wastewater treatment and economic benefits are achieved.
Patent Information
- Application Number
- CN202422487973.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-15
AI Technical Summary
The existing high-salt wastewater treatment technology is prone to cause scale accumulation and corrosion of the equipment, affecting the stability and thermal efficiency of the equipment, and has high artificial consumption.
A combined evaporation system of one-effect and two-effects is adopted, including a first-effect evaporation system, a two-effect evaporation system and a condensation system. Various detectors and valves are installed in the system to realize multiple heating evaporation and separation of high-salt wastewater.
The high-salt wastewater treatment volume has been increased to 30t/h, reducing manual consumption, extending the equipment operation cycle, and improving production efficiency and economic benefits.
Smart Images
Figure CN223239817U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of desalination, in particular to a single-effect and two-effect combined evaporation system for sewage pretreatment. Background Art
[0002] In industries such as chemical industry, hazardous waste incineration, petroleum refining, textile and food processing, high-salt wastewater is usually generated during the production process. These high-salt wastewaters contain high concentrations of salt, generally including various organic and inorganic compounds such as sodium chloride, sodium sulfate, sodium nitrate, etc. If these wastewaters are discharged directly, they will have a certain impact on the environment.
[0003] The main technologies currently used to treat this type of high-salinity wastewater include mechanical compression evaporation (MVR) and multiple-effect evaporation (MED). Both technologies are based on the principle of evaporation. By heating the wastewater, dissolved salts and other non-volatile substances are separated from the water, forming salt crystals and other solids. These salt crystals and other solids easily form scale on the inner surface of the heat exchanger, resulting in reduced thermal efficiency and may even cause equipment blockage, which will cause certain corrosion and damage to the equipment, and ultimately may lead to instability or even paralysis of the entire production system. Utility Model Content
[0004] The purpose of the utility model is to provide a single-effect and double-effect combined evaporation system for sewage pretreatment, aiming to solve the above-mentioned technical problems. The utility model improves the treatment capacity of high-salt wastewater by providing a single-effect evaporation system, a double-effect evaporation system and a condensation system, and by adding various display meters and various valves to the system, the system is made more perfect, labor consumption is reduced, and economic performance is improved.
[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions:
[0006] A single-effect and double-effect combined evaporation system for sewage pretreatment comprises a single-effect evaporation system, a double-effect evaporation system and a condensation system, wherein the single-effect evaporation system comprises a single-effect heater and a single-effect separator, the double-effect evaporation system comprises a double-effect heater and a double-effect separator, the condensation system comprises a condensate storage tank, a waste condensate storage tank and a condensate tank, the single-effect evaporation system is connected to the double-effect evaporation system via a second main delivery pipeline, and the condensation system is connected to the single-effect evaporation system and the double-effect evaporation system via a main condensation pipeline.
[0007] Furthermore, the single-effect heater is provided with a liquid level transmitter and a steam trap, the high-salt wastewater inlet of the single-effect heater is connected to the flash feed pump through the first main conveying pipeline, the low-pressure steam inlet of the single-effect heater is connected to the low-pressure steam main through a pipeline, a liquid level regulating valve is provided on the first main conveying pipeline, and a pressure switch valve connecting to the outside of the room is provided between the single-effect heater and the low-pressure steam main.
[0008] Furthermore, the steam outlet of the first-effect heater is connected to the condensate tank through a pipeline, the exhaust gas outlet of the first-effect heater is connected to the vent pipe through a pipeline, the saturated steam condensate outlet of the first-effect heater is connected to the condensate tank through a pipeline, and the high-salt wastewater outlet of the first-effect heater is connected to the second-effect heater through a second main transmission pipeline.
[0009] Furthermore, the second main delivery pipeline is provided with a single-effect circulation pump, a flow regulating valve, a thermometer and a check valve.
[0010] Furthermore, the first-effect separator is provided with a steam trap, which is connected to the steam trap in the first-effect heater through a pipeline, the high-salt wastewater input pipeline of the first-effect separator is connected to the second main transmission pipeline through a pipeline, the secondary steam output port of the first-effect separator is connected to the second-effect heater through a pipeline, and the high-salt wastewater inlet of the first-effect separator is connected to the first-effect heater through a pipeline. A pressure gauge and a thermometer are provided between the first-effect separator and the second-effect heater. The first-effect separator is generally used for the preliminary separation of large particles of solid matter, can separate larger solid particles from sewage, and generate secondary steam. The second-effect separator further separates solid-liquid mixtures on the basis of the first effect, and can remove smaller particulate matter.
[0011] Furthermore, the high-salt wastewater outlet of the second-effect heater is connected to the subsequent treatment device through the third main delivery pipe, the condensed water outlet of the second-effect heater is connected to the subsequent treatment device through a pipeline, and the non-condensing steam outlet of the second-effect heater is connected to the non-condensing steam tank through a pipeline. The third main delivery pipe is provided with a second-effect circulation pump, a thermometer, a pressure gauge and a check valve, and the second-effect heater is provided with a liquid level transmitter and a steam trap. All kinds of data detectors can detect the reaction of the equipment in real time to ensure the occurrence of the reaction.
[0012] Furthermore, a steam trap is provided in the second-effect separator and is connected to the steam trap in the second-effect heater via a pipeline.
[0013] Furthermore, the high-salt wastewater input port of the second-effect separator is connected to the third main conveying pipeline through a pipeline, the secondary steam output port of the second-effect separator is connected to the subsequent treatment device through a pipeline, and the high-salt wastewater inlet of the second-effect separator is connected to the second-effect heater through a pipeline. A pressure gauge and a thermometer are provided between the second-effect separator and the subsequent treatment device.
[0014] Furthermore, the industrial water inlet of the condensate tank is connected to the industrial water main through a pipeline, the condensate outlet pipeline of the condensate tank is connected to the steam condensate preheater, and the condensate tank is also provided with a liquid level transmitter.
[0015] Furthermore, the condensed water storage tank is connected to the dirty condensed water storage tank through the main condensing pipeline, the condensed water outlet of the main condensing pipeline is connected to the industrial water main through the first branch, the condensed water outlet of the main condensing pipeline is connected to the pipeline between the first-effect heater and the low-pressure steam main through the second branch, the condensed water outlet of the main condensing pipeline is connected to the first-effect heater through the third branch, the condensed water outlet of the main condensing pipeline is connected not only to the first-effect separator but also to the pipeline between the steam traps through the fourth branch, the condensed water outlet of the main condensing pipeline is connected to the second-effect heater through the first dirty branch, and the condensed water outlet of the main condensing pipeline is connected not only to the second-effect separator but also to the pipeline between the steam traps through the sixth branch.
[0016] The utility model discloses a single-effect and double-effect combined evaporation system for sewage pretreatment, which has the following beneficial effects:
[0017] 1. This utility model is a single-effect and double-effect combined evaporation system for sewage pretreatment. This utility model is equipped with a single-effect evaporation system, a double-effect evaporation system and a condensation system. By heating and evaporating high-salt wastewater multiple times and separating them, the original sewage treatment capacity is increased from 9.5t / h to 30t / h, thereby improving environmental protection efficiency and economic benefits.
[0018] 2. This utility model is a single-effect and double-effect combined evaporation system for sewage pretreatment. By adding various data detectors and valves to each system, the system is made more complete, labor consumption is reduced, and it is beneficial to reduce costs and increase efficiency.
[0019] 3. The utility model is a single-effect and double-effect combined evaporation system for sewage pretreatment. The operating cycle is set by such a process. The system originally had to be stopped for high-pressure cleaning every four months. Now it has been running for four months and there has been no obvious decline in heat exchange efficiency, which greatly improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the overall system structure of a single-effect and two-effect combined evaporation system for sewage pretreatment according to the utility model.
[0021] Figure 2 This is a piping code indication diagram in a single-effect and two-effect combined evaporation system for sewage pretreatment according to the utility model. DETAILED DESCRIPTION
[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in further detail below with reference to the embodiments and accompanying drawings.
[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element; when an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0025] like Figure 1 and Figure 2 As shown, a single-effect and double-effect combined evaporation system for sewage pretreatment includes a single-effect evaporation system, a double-effect evaporation system and a condensation system. The single-effect evaporation system includes a single-effect heater 2 and a single-effect separator 5. The double-effect evaporation system includes a double-effect heater 3 and a double-effect separator 6. The condensation system includes a condensed water storage tank 10, a waste condensed water storage tank 11 and a condensed water tank 7. The single-effect evaporation system is connected to the double-effect evaporation system via a second main delivery pipeline 102. The condensation system is connected to the single-effect evaporation system and the double-effect evaporation system via a main condensation pipeline 111.
[0026] like Figure 1 and Figure 2 As shown, the single-effect heater 2 is provided with a liquid level transmitter 22 and a steam trap 15. The high-salt wastewater inlet of the single-effect heater 2 is connected to the flash feed pump 1 through the first main conveying pipeline 101. The low-pressure steam inlet of the single-effect heater 2 is connected to the low-pressure steam main 8 through a pipeline. The first main conveying pipeline 101 is provided with a liquid level regulating valve 16. A pressure switch valve 24 connected to the outside of the room is provided between the single-effect heater 2 and the low-pressure steam main 8.
[0027] like Figure 1 and Figure 2 As shown, the steam outlet of the first-effect heater 2 is connected to the condensate tank 7 through a pipeline, the exhaust gas outlet of the first-effect heater 2 is connected to the vent pipe 14 through a pipeline, the saturated steam condensate outlet of the first-effect heater 2 is connected to the condensate tank 7 through a pipeline, and the high-salt wastewater outlet of the first-effect heater 2 is connected to the second-effect heater 3 through the second main transmission pipeline 102.
[0028] like Figure 1 and Figure 2As shown, the second main delivery pipeline 102 is provided with a single-effect circulation pump 18 , a flow regulating valve 17 , a thermometer 21 and a check valve 19 .
[0029] like Figure 1 and Figure 2 As shown, the first-effect separator 5 is provided with a steam trap 15, and the steam trap 15 is connected to the steam trap 15 in the first-effect heater 2 through a pipeline. The high-salt wastewater input pipeline of the first-effect separator 5 is connected to the second main conveying pipeline 102 through a pipeline. The secondary steam output port of the first-effect separator 5 is connected to the second-effect heater 3 through a pipeline, and the high-salt wastewater inlet of the first-effect separator 5 is connected to the first-effect heater 2 through a pipeline. A pressure gauge 23 and a thermometer 21 are provided between the first-effect separator 5 and the second-effect heater 3. The first-effect separator 5 is generally used for the preliminary separation of large particles of solid matter, can separate larger solid particles from sewage, and generate secondary steam. The second-effect separator 6 further separates the solid-liquid mixture on the basis of the first effect, and can remove smaller particulate matter.
[0030] like Figure 1 and Figure 2 As shown, the high-salt wastewater outlet of the second-effect heater 3 is connected to the subsequent treatment device 4 through the third main delivery pipe 103, the condensed water outlet of the second-effect heater 3 is connected to the subsequent treatment device 4 through a pipeline, and the non-condensing steam outlet of the second-effect heater 3 is connected to the non-condensing steam tank 12 through a pipeline. The third main delivery pipe 103 is provided with a second-effect circulation pump 20, a thermometer 21, a pressure gauge 23 and a check valve 19, and the second-effect heater 3 is provided with a liquid level transmitter 22 and a steam trap 15. The various data detectors can detect the reaction of the equipment in real time to ensure the occurrence of the reaction.
[0031] like Figure 1 and Figure 2 As shown, a steam trap 15 is provided in the second-effect separator 6 and is connected to the steam trap 15 in the second-effect heater 3 through a pipeline.
[0032] like Figure 1 and Figure 2 As shown, the high-salt wastewater input port of the second-effect separator 6 is connected to the third main delivery pipe 103 through a pipeline, the secondary steam output port of the second-effect separator 6 is connected to the subsequent treatment device 4 through a pipeline, and the high-salt wastewater inlet of the second-effect separator 6 is connected to the second-effect heater 3 through a pipeline. A pressure gauge 23 and a thermometer 21 are provided between the second-effect separator 6 and the subsequent treatment device 4.
[0033] like Figure 1 and Figure 2As shown, the industrial water inlet of the condensed water tank 7 is connected to the industrial water main 9 through a pipeline, the condensed water outlet pipeline of the condensed water tank 7 is connected to the steam condensed water preheater 13, and the condensed water tank 7 is also provided with a liquid level transmitter 22.
[0034] like Figure 1 and Figure 2 As shown, the condensed water storage tank 10 is connected to the dirty condensed water storage tank 11 through the main condensation pipeline 111, and the condensed water outlet of the main condensation pipeline 111 is connected to the industrial water main 9 through the first branch 112. The condensed water outlet of the main condensation pipeline 111 is connected to the pipeline between the first-effect heater 2 and the low-pressure steam main 8 through the second branch 113. The condensed water outlet of the main condensation pipeline 111 is connected to the first-effect heater 2 through the third branch 114. The condensed water outlet of the main condensation pipeline 111 is connected not only to the first-effect separator 5 but also to the pipeline between the steam trap 15 through the fourth branch 115. The condensed water outlet of the main condensation pipeline 111 is connected to the second-effect heater 3 through the fifth branch 116. The condensed water outlet of the main condensation pipeline 111 is connected not only to the second-effect separator 6 but also to the pipeline between the steam trap 15 through the sixth branch 117.
[0035] It should be noted that: in this embodiment, the high-salt wastewater is transferred from the flash feed pump 1 to the first effect heater 2 through the first main delivery pipeline 101, and after the first effect heating, it is transferred to the second effect heater 3 through the second main delivery pipeline 102, and finally the high-salt wastewater is transferred to the subsequent treatment device 4 through the third main delivery pipeline 103; wherein the first effect heater 2 and the second effect heater 3 require steam and condensed water during the operation process, and the required steam is provided to the first effect heater 2 by the low-pressure steam main pipe 8 through the pipeline. Part of the high-salt wastewater after heating is transported to the first effect separator 5 through the pipeline. The separator can separate the high-salt wastewater into secondary steam, and transport the secondary steam to the second effect heater 3 through the pipeline. The separated high-salt wastewater is then transferred to the first effect heater 2 through the pipeline for circulation, and the excess steam in the first effect heater 2 is transported to the vent pipe 14 by the pipeline; Similarly, after the high-salt wastewater is heated in the second-effect heater 3 and reacts with the secondary steam, it is transported to the second-effect separator 6 through a pipeline, and the separated secondary steam is transferred to the subsequent treatment device 4 through a pipeline. The separated high-salt wastewater returns to the second-effect heater 3 through a pipeline for circulation; the condensed water is transferred from the main condensation pipeline 111 to the first-effect heater 2 through the second branch 113, and then transferred to the condensed water tank 7 through a pipeline. The main condensation pipeline 111 transfers the condensed water to the first-effect heater 2 through the third branch 114, and the main condensation pipeline 111 transfers the condensed water to the first-effect separator 5 through the fourth branch 115. The main condensation pipeline 111 transfers the condensed water to the second-effect heater 3 through the fifth branch 116, and then transfers it to the second-effect separator 6 through the sixth branch 117. The condensed water storage tank 10 and the dirty condensed water storage tank 11 are connected through the main condensation pipeline 111.
[0036] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any technician familiar with the profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, which are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention still belong to the technical solution of the present invention.
Claims
1. A single-effect and double-effect combined evaporation system for sewage pretreatment, comprising a single-effect evaporation system, a double-effect evaporation system and a condensation system, characterized in that: The first-effect evaporation system includes a first-effect heater and a first-effect separator, the second-effect evaporation system includes a second-effect heater and a second-effect separator, the condensation system includes a condensed water storage tank, a dirty condensed water storage tank and a condensed water tank, the first-effect evaporation system is connected to the second-effect evaporation system through a second main transmission pipeline, and the condensation system is connected to the first-effect evaporation system and the second-effect evaporation system through a main condensation pipeline.
2. The single-effect and double-effect combined evaporation system for sewage pretreatment according to claim 1, characterized in that: The single-effect heater is provided with a liquid level transmitter and a steam trap. The high-salt wastewater inlet of the single-effect heater is connected to the flash feed pump through the first main conveying pipeline. The low-pressure steam inlet of the single-effect heater is connected to the low-pressure steam main through a pipeline. A liquid level regulating valve is provided on the first main conveying pipeline. A pressure switch valve connected to the outside of the room is provided between the single-effect heater and the low-pressure steam main.
3. The single-effect and double-effect combined evaporation system for sewage pretreatment according to claim 1, characterized in that: The steam outlet of the first-effect heater is connected to the condensate tank through a pipeline, the exhaust gas outlet of the first-effect heater is connected to the vent pipe through a pipeline, the saturated steam condensate outlet of the first-effect heater is connected to the condensate tank through a pipeline, and the high-salt wastewater outlet of the first-effect heater is connected to the second-effect heater through a second main transmission pipeline.
4. The single-effect and double-effect combined evaporation system for sewage pretreatment according to claim 1, characterized in that: The second main delivery pipeline is provided with a single-effect circulation pump, a flow regulating valve, a thermometer and a check valve.
5. The single-effect and double-effect combined evaporation system for sewage pretreatment according to claim 1, characterized in that: The first-effect separator is provided with a steam trap, which is connected to the steam trap in the first-effect heater through a pipeline. The high-salt wastewater input pipeline of the first-effect separator is connected to the second main transmission pipeline through a pipeline. The secondary steam output port of the first-effect separator is connected to the second-effect heater through a pipeline. The high-salt wastewater inlet of the first-effect separator is connected to the first-effect heater through a pipeline. A pressure gauge and a thermometer are provided between the first-effect separator and the second-effect heater.
6. The single-effect and double-effect combined evaporation system for sewage pretreatment according to claim 1, characterized in that: The high-salt wastewater outlet of the second-effect heater is connected to the subsequent treatment device through the third main delivery pipe, the condensed water outlet of the second-effect heater is connected to the subsequent treatment device through a pipeline, and the non-condensing steam outlet of the second-effect heater is connected to the non-condensing steam tank through a pipeline. The third main delivery pipe is provided with a second-effect circulation pump, a thermometer, a pressure gauge and a check valve.
7. The single-effect and double-effect combined evaporation system for sewage pretreatment according to claim 1, characterized in that: A steam trap is provided in the second-effect separator and is connected to the steam trap in the second-effect heater through a pipeline.
8. The single-effect and double-effect combined evaporation system for sewage pretreatment according to claim 1, characterized in that: The high-salt wastewater input port of the second-effect separator is connected to the third main conveying pipeline through a pipeline, the secondary steam output port of the second-effect separator is connected to the subsequent treatment device through a pipeline, and the high-salt wastewater inlet of the second-effect separator is connected to the second-effect heater through a pipeline. A pressure gauge and a thermometer are provided between the second-effect separator and the subsequent treatment device.
9. The single-effect and double-effect combined evaporation system for sewage pretreatment according to claim 1, characterized in that: The industrial water inlet of the condensate tank is connected to the industrial water main through a pipeline, the condensate outlet pipeline of the condensate tank is connected to the steam condensate preheater, and the condensate tank is also provided with a liquid level transmitter.
10. The single-effect and double-effect combined evaporation system for sewage pretreatment according to claim 1, characterized in that: The condensed water storage tank is connected to the dirty condensed water storage tank through the main condensation pipeline, the condensed water outlet of the main condensation pipeline is connected to the industrial water main through the first branch, the condensed water outlet of the main condensation pipeline is connected to the pipeline between the first-effect heater and the low-pressure steam main through the second branch, the condensed water outlet of the main condensation pipeline is connected to the first-effect heater through the third branch, the condensed water outlet of the main condensation pipeline is connected to the first-effect separator through the fourth branch and the pipeline between the steam trap, the condensed water outlet of the main condensation pipeline is connected to the second-effect heater through the fifth branch, and the condensed water outlet of the main condensation pipeline is connected to the second-effect separator through the sixth branch and the pipeline between the steam trap.