A separation and purification system for secondary steam in an MVR evaporation system
The integrated secondary steam separation and purification system, employing cyclone separation, countercurrent spray washing, and wire mesh defoaming processes, solves the problem of poor secondary steam purification in MVR evaporation systems, achieving efficient purification and low-energy secondary steam treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU RUISHENGHUA ENERGY TECH CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-06-19
AI Technical Summary
In MVR evaporation systems, secondary steam carries droplets and volatile components that are not effectively purified, affecting water quality and increasing equipment investment and operating costs. Existing purification systems are ineffective and have high resistance.
The integrated secondary steam separation and purification system includes a cyclone separation chamber, a purification settling chamber, and a wire mesh demister. Through a four-stage treatment process of cyclone separation, countercurrent spray washing, settling, and wire mesh demister, the system purifies the droplets and volatile components in the secondary steam step by step.
It improves the purification quality of secondary steam, reduces system resistance, reduces the number of equipment and energy consumption, and meets the high-quality recycling needs of industrial production.
Smart Images
Figure CN224370680U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical evaporation technology, specifically to a separation and purification system for secondary steam in an MVR evaporation system. Background Technology
[0002] During the operation of an MVR evaporation system, secondary steam often carries some droplets and volatile components (such as ammonia and hydrogen chloride). If it is not effectively purified, it will seriously affect the quality of the subsequent distilled water.
[0003] Currently, the purification treatment of secondary steam generally suffers from problems such as poor purification effect, large number of required equipment, and high overall system resistance. This not only affects the operating efficiency of MVR systems but also increases equipment investment and operating costs, making it difficult to meet the demand for high-quality recovery and utilization of secondary steam in industrial production. Therefore, developing a secondary steam separation and purification system with high integration, good purification effect, and low system resistance has become an urgent technical problem to be solved in this field. Utility Model Content
[0004] The purpose of this invention is to provide a separation and purification system for secondary steam in an MVR evaporation system, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a separation and purification system for secondary steam in an MVR evaporation system, comprising a cylinder, wherein the cylinder has a cyclone separation chamber, a purification settling chamber, and a wire mesh demister chamber arranged sequentially from bottom to top; the cyclone separation chamber has a spray washing chamber in the middle, the bottom of the spray washing chamber is connected to the cyclone separation chamber, the top of the spray washing chamber is connected to the purification settling chamber, the cyclone separation chamber is connected to a steam inlet pipe, and the wire mesh demister chamber is connected to a steam outlet pipe;
[0006] The cyclone separator chamber has a collection tank for collecting droplets thrown onto the cylinder wall from the secondary steam. The spray washing chamber has a spray pipe for spraying atomized washing liquid to contact the secondary steam and absorb the volatile components it contains.
[0007] Preferably, a guide cover is connected to the inner wall of the cylinder, and a guide tube is connected to the lower end of the guide cover. The inner diameter of the guide cover gradually increases from bottom to top, and the inner cavity of the guide tube forms the spray washing chamber.
[0008] Preferably, the collecting tank is connected to a droplet discharge pipe, and a first valve body is installed on the droplet discharge pipe.
[0009] Preferably, a washing liquid tank is provided at the bottom of the cylinder, the washing liquid tank is connected to a purification circulation pump through a first infusion pipe, and the purification circulation pump is connected to the spray pipe through a second infusion pipe.
[0010] Preferably, the washing liquid container is connected to a washing liquid inlet pipe and a washing liquid outlet pipe, a second valve body is installed on the washing liquid inlet pipe, and a third valve body is installed on the washing liquid outlet pipe.
[0011] Preferably, the washing liquid tank is equipped with a concentration detector and a level detector. The concentration detector is signal-connected to the third valve body, the level detector is signal-connected to the second valve body, and the concentration detector is signal-connected to the purification circulation pump.
[0012] Preferably, the wire mesh demister in the wire mesh demister chamber is made of corrosion-resistant material.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] The system adopts an integrated design, which integrates multi-level purification functions into the same device through structural separation, reducing the number of devices and the footprint of the device, while avoiding the complex pipeline problems caused by connecting multiple devices.
[0015] Through a four-stage treatment process of cyclone separation, countercurrent spray washing, sedimentation and wire mesh defogging, the liquid droplets, mist droplets and volatile components in the secondary steam are purified step by step, which greatly improves the purification quality of the secondary steam and effectively solves the problem of poor effect of traditional purification methods.
[0016] By optimizing the connection structure and steam flow channel design of each functional area, the secondary steam flows smoothly within the system. Compared with traditional multi-equipment series systems, this significantly reduces the overall system resistance and helps reduce the energy consumption of the MVR system. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram showing the connection between the integral guide cover and the guide tube of this utility model;
[0019] Figure 3 This is a schematic diagram of the secondary steam purification flow direction in the purification system of this utility model;
[0020] In the diagram: 10. Cyclone separation chamber; 11. Steam inlet pipe; 12. Collection tank; 121. Droplet discharge pipe; 20. Purification settling chamber; 30. Wire mesh demister chamber; 31. Steam outlet pipe; 40. Spray washing chamber; 41. Spray pipe; 42. Guide hood; 43. Guide pipe; 50. Washing liquid container; 51. Washing liquid inlet pipe; 52. Washing liquid outlet pipe; 60. Purification circulation pump; 61. First infusion pipe; 62. Second infusion pipe. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1-3
[0023] Provides a secondary steam separation and purification system for MVR evaporation systems:
[0024] The cylinder has a cyclone separation chamber 10, a purification settling chamber 20 and a wire mesh demister chamber 30 arranged sequentially from bottom to top. The cyclone separation chamber 10 has a spray washing chamber 40 in the middle. The bottom of the spray washing chamber 40 is connected to the cyclone separation chamber 10 and the top of the spray washing chamber 40 is connected to the purification settling chamber 20. The cyclone separation chamber 10 is connected to a steam inlet pipe 11 and the wire mesh demister chamber 30 is connected to a steam outlet pipe 31.
[0025] Secondary steam enters the cyclone separation chamber 10 through the steam inlet pipe 11, then enters the spray washing chamber 40 from bottom to top, then enters the purification settling chamber 20, and finally enters the wire mesh defoaming chamber 30 before being discharged through the steam outlet pipe 31.
[0026] The cyclone separation chamber 10 has a collection tank 12, which is used to collect the droplets thrown onto the cylinder wall in the secondary steam. When the secondary steam enters the cyclone separation chamber 10, the droplets and mist entrained in the secondary steam are thrown onto the cylinder wall by the action of centrifugal force to form cyclone separation liquid, which is then collected by the collection tank 12 to complete the initial gas-liquid separation of the secondary steam.
[0027] A guide hood 42 is connected to the inner wall of the cylinder, which separates the cyclone separation chamber 10 and the purification settling chamber 20. A guide pipe 43 is connected to the lower end of the guide hood 42. The inner diameter of the guide hood 42 gradually increases from bottom to top. The inner cavity of the guide pipe 43 forms a spray washing chamber 40. The spray washing chamber 40 has a spray pipe 41. The spray pipe 41 is used to spray atomized washing liquid to contact the secondary steam and absorb the volatile components contained therein. The secondary steam that has undergone the initial gas-liquid separation enters the spray washing chamber 40 from bottom to top. The atomized washing liquid sprayed through the spray pipe 41 forms a countercurrent contact with the rising secondary steam, absorbing the volatile components such as ammonia and hydrogen chloride contained in the secondary steam. The washing liquid is pure water, and dilute acid or dilute alkali solution can be selected according to the material.
[0028] A washing liquid tank 50 is provided at the bottom of the cylinder. The washing liquid tank 50 is connected to a purification circulation pump 60 through a first liquid delivery pipe 61. The purification circulation pump 60 is connected to the spray pipe 41 through a second liquid delivery pipe 62. The washing liquid, after absorbing volatile components such as ammonia and hydrogen chloride, falls into the bottom washing liquid tank 50. The purification circulation pump 60 circulates the liquid to the spray pipe 41 through the first liquid delivery pipe 61 and the first liquid delivery pipe 62, thereby forming a circulating washing loop.
[0029] After washing, the secondary steam rises into the purification settling chamber 20. When the secondary steam flows from the guide pipe 43 into the guide cover 42, whose inner diameter gradually increases from bottom to top, the flow rate will decrease. By utilizing the reduced steam flow rate and gravity, the large droplets generated during the washing process settle in this area. The settled droplets flow back to the washing liquid tank 50 below. The height of the settling zone is designed according to the steam flow rate and the expected settling effect to ensure that the large droplets have sufficient settling time.
[0030] After settling, the secondary steam enters the wire mesh demister chamber 30, where it undergoes gas-liquid separation again through the wire mesh demister in this area to further remove the tiny droplets remaining in the steam, ensuring that the entrainment of the secondary steam is minimized. The wire mesh demister in the wire mesh demister chamber 30 is made of corrosion-resistant materials, such as polytetrafluoroethylene and polypropylene.
[0031] In summary, the system adopts an integrated design, which integrates multi-level purification functions into the same device through structural separation, reducing the number of devices and the footprint of the device, while avoiding the complex piping problems caused by connecting multiple devices.
[0032] Through a four-stage treatment process of cyclone separation, countercurrent spray washing, sedimentation and wire mesh defogging, the liquid droplets, mist droplets and volatile components in the secondary steam are purified step by step, which greatly improves the purification quality of the secondary steam and effectively solves the problem of poor effect of traditional purification methods.
[0033] By optimizing the connection structure and steam flow channel design of each functional area, the secondary steam flows smoothly within the system. Compared with traditional multi-equipment series systems, this significantly reduces the overall system resistance and helps reduce the energy consumption of the MVR system.
[0034] The collection tank 12 is connected to a droplet discharge pipe 121, and a first valve body is installed on the droplet discharge pipe 121. By controlling the first valve body, droplets and mist droplets can be discharged through the droplet discharge pipe 121.
[0035] The washing liquid tank 50 is connected to a washing liquid inlet pipe 51 and a washing liquid outlet pipe 52. A second valve body is installed on the washing liquid inlet pipe 51, and a third valve body is installed on the washing liquid outlet pipe 52. The washing liquid tank 50 is equipped with a concentration detector and a level detector. The concentration detector is connected to the third valve body, the level detector is connected to the second valve body, and the concentration detector is connected to the purification circulation pump 60.
[0036] The concentration detector is a conductivity meter, which confirms the concentration of the washing liquid by detecting conductivity. When the concentration detector detects that the concentration of the washing liquid has reached the set value, it controls the third valve to discharge the washing liquid from the washing liquid outlet pipe 52. At the same time, the liquid level detector can control the second valve to replenish fresh washing liquid from the washing liquid outlet pipe 52 into the washing liquid tank 50. The signal sent by the liquid level detector to control the second valve when the liquid level is low has a delay compared to the signal sent by the concentration detector to control the third valve when the washing liquid concentration reaches the set value. Furthermore, the flow rate of the purification circulation pump 60 can be adjusted according to the amount of secondary steam and the concentration of pollutants to ensure the spray washing effect.
[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A system for separating and purifying secondary vapor in an MVR evaporation system, characterized in that, The device includes a cylindrical body, from bottom to top of which are arranged a cyclone separation chamber (10), a purification settling chamber (20), and a wire mesh demister chamber (30). The cyclone separation chamber (10) has a spray washing chamber (40) in the middle. The bottom of the spray washing chamber (40) is connected to the cyclone separation chamber (10), and the top of the spray washing chamber (40) is connected to the purification settling chamber (20). The cyclone separation chamber (10) is connected to a steam inlet pipe (11), and the wire mesh demister chamber (30) is connected to a steam outlet pipe (31). The cyclone separation chamber (10) has a collection tank (12) for collecting droplets thrown onto the cylinder wall in the secondary steam. The spray washing chamber (40) has a spray pipe (41) for spraying atomized washing liquid to contact the secondary steam and absorb the volatile components contained therein.
2. The separation and purification system of secondary vapor in a MVR evaporation system according to claim 1, characterized in that, The inner wall of the cylinder is connected to a guide cover (42), and the lower end of the guide cover (42) is connected to a guide tube (43). The inner diameter of the guide cover (42) gradually increases from bottom to top, and the inner cavity of the guide tube (43) forms the spray washing chamber (40).
3. The system for separating and purifying secondary vapor in a MVR evaporation system according to claim 1, wherein, The collection tank (12) is connected to a droplet drain pipe (121), and a first valve body is installed on the droplet drain pipe (121).
4. The system for separating and purifying secondary vapor in a MVR evaporation system according to claim 1, wherein, The bottom of the cylinder is provided with a washing liquid tank (50), and the washing liquid tank (50) is connected to a purification circulation pump (60) through a first infusion pipe (61). The purification circulation pump (60) is connected to the spray pipe (41) through a second infusion pipe (62).
5. The separation and purification system of secondary vapor in a MVR evaporation system according to claim 4, characterized in that, The washing liquid container (50) is connected to a washing liquid inlet pipe (51) and a washing liquid outlet pipe (52). A second valve body is installed on the washing liquid inlet pipe (51), and a third valve body is installed on the washing liquid outlet pipe (52).
6. The separation and purification system of secondary vapor in a MVR evaporation system according to claim 5, characterized in that, The washing liquid tank (50) is equipped with a concentration detector and a level detector. The concentration detector is connected to the third valve body, the level detector is connected to the second valve body, and the concentration detector is connected to the purification circulation pump (60).
7. The system for separating and purifying secondary vapor in a MVR evaporation system according to claim 1, wherein, The wire mesh demister in the wire mesh demister chamber (30) is made of corrosion-resistant material.