Low-temperature methanol washing spraying device

Abstract

The utility model relates to the technical field of gas purification, and discloses a low-temperature methanol washing spraying device. The low-temperature methanol washing spraying device comprises a spraying tank, gas stripping nitrogen pipelines which are evenly distributed are arranged on the right side of the top of the outer wall of the spraying tank, a gas outlet pipe is arranged on the left side of the bottom of the outer wall of the spraying tank, a gas inlet and a water outlet are formed in the upper left corner and the lower right corner of the front side of the spraying tank respectively, and a motor is arranged on the top of the spraying tank. By additionally arranging the gas stripping nitrogen pipeline, a stream of low-pressure nitrogen is introduced into the top of the spraying tank, the content of CO2 in a semi-lean methanol solution is reduced by means of gas stripping, the semi-lean methanol solution becomes a quasi-lean methanol solution, and the semi-lean methanol solution is used for washing, so that the energy consumption is reduced; the content of CO2 in the semi-barren liquor is properly reduced, and a small stream of low-pressure nitrogen is consumed for gas stripping, so that the temperature of the semi-barren liquor is further reduced, the absorption capacity of the semi-barren liquor is improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas purification, in particular to a low-temperature methanol washing spray device. Background Art

[0002] The low-temperature methanol washing process was jointly developed by Linde and Lurgi in Germany in the 1950s. It is a purification process suitable for treating high-concentration acidic gases. The process uses cold methanol as a solvent and utilizes the different absorption selectivity of methanol for each component in the raw gas to achieve the purpose of removing acidic gases. It is a physical absorption process.

[0003] The method of using cold methanol as a solvent results in high energy consumption and low absorption capacity for semi-lean liquid. The condensation produced during spraying will remain on the inner wall of the spray tank, thereby affecting the spraying effect and making the spraying treatment efficiency low. Therefore, in view of the current situation, it is now necessary to improve it. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a low-temperature methanol washing spray device, which effectively solves the problem that the method of using cold methanol as a solvent results in high energy consumption and low absorption capacity for semi-lean liquid, and the condensation generated during spraying will remain on the inner wall of the spray tank, thereby affecting the spraying effect and resulting in low spray treatment efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-temperature methanol washing spray device, comprising a spray tank, a uniformly distributed gas lift nitrogen pipeline is arranged on the right side of the top of the outer wall of the spray tank, and an air outlet pipe is arranged on the left side of the bottom of the outer wall of the spray tank, an air inlet and a water outlet are respectively arranged at the upper left corner and the lower right corner of the front side of the spray tank, a motor is arranged on the top of the spray tank, a connecting column is arranged at the output end of the motor, scrapers are arranged on the left and right sides of the connecting column, and the scraper and the connecting column are both located in the inner cavity of the spray tank.

[0006] Preferably, a limit plate is provided in the inner cavity of the spray tank, a filter plate is provided on the top of the limit plate, the filter plate is located at the bottom of the scraper and the connecting column, and a cleaning brush is provided at the bottom of the scraper.

[0007] Preferably, a feed hole is provided at the top of the filter plate, and a filter receiving box is provided at the bottom of the feed hole.

[0008] Preferably, a front-to-back symmetrical limiting slide plate is provided at the bottom of the feed hole, and sliding plates are provided at the front and back sides of the filter receiving box, and the sliding plates match the limiting slide plates.

[0009] Preferably, a mounting groove is provided on the front side of the spray tank, a closed door is provided in the inner cavity of the mounting groove, and an observation window is provided on the front side of the closed door.

[0010] Preferably, the top of the spray tank is arc-shaped, and the scraper fits in the inner cavity of the spray tank.

[0011] Compared with the prior art, the utility model has the following beneficial effects: 1. By adding a gas lift nitrogen pipeline, a stream of low-pressure nitrogen is introduced into the top of the spray tank, and the CO2 content in the semi-lean methanol liquid is reduced by means of gas lift, so that the semi-lean methanol liquid becomes a quasi-lean methanol liquid. The semi-lean methanol liquid is used for washing, which reduces energy consumption and appropriately reduces the CO2 content in the semi-lean liquid. The consumption of a small stream of low-pressure nitrogen for gas lift further reduces the temperature of the semi-lean liquid, increases the absorption capacity of the semi-lean liquid, and reduces energy consumption;

[0012] The motor drives the connecting column to rotate, and the rotation of the connecting column drives the scraper to rotate. The scraper scrapes the inner wall of the spray tank, thereby preventing the water vapor generated after the spraying treatment from staying on the inner wall of the spray tank and condensing, affecting the subsequent spraying treatment, and ensuring the normal spraying treatment;

[0013] When the scraper rotates, it can drive the cleaning brush at the bottom to clean the top of the filter plate. The spray filter scraped off by the scraper enters the filter receiving box through the feed hole, thereby preventing the spray filter from clogging the top of the filter plate and affecting the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0015] In the attached picture:

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the installation slot of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the scraper of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the filter plate of the utility model;

[0020] In the figure: 100, spray tank; 101, gas lift nitrogen pipeline; 102, outlet pipe; 103, closed door; 104, motor; 105, observation window; 106, mounting groove; 107, limit plate; 108, connecting column; 109, scraper; 110, filter plate; 111, filter receiving box; 112, feed hole; 113, limit slide plate; 114, sliding plate. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] Embodiment 1, by Figure 1 , Figure 2 and Figure 3 The utility model provides a low-temperature methanol washing spray device, comprising a spray tank 100, the top right side of the outer wall of the spray tank 100 is connected with a uniformly distributed gas lift nitrogen pipeline 101, and the bottom left side of the outer wall of the spray tank 100 is connected with an outlet pipe 102, the upper left corner and the lower right corner of the front side of the spray tank 100 are respectively provided with an air inlet and a water outlet, the top of the spray tank 100 is fixedly connected with a motor 104, the output end of the motor 104 is fixedly connected with a connecting column 108, the left and right sides of the connecting column 108 are fixedly connected with scrapers 109, the scrapers 109 and the connecting column 108 are both located in the inner cavity of the spray tank 100, and a stream of low-pressure nitrogen is introduced into the top of the spray tank 100 by adding the gas lift nitrogen pipeline 101. Gas lift is used to reduce the CO2 content in the semi-lean methanol liquid, so that the semi-lean methanol liquid becomes a quasi-lean methanol liquid. The semi-lean methanol liquid is used for washing to reduce energy consumption and appropriately reduce the CO2 content in the semi-lean liquid. A small amount of low-pressure nitrogen is consumed for gas lift to further reduce the temperature of the semi-lean liquid, increase the absorption capacity of the semi-lean liquid, and reduce energy consumption. At the same time, the motor 104 drives the connecting column 108 to rotate, and the rotation of the connecting column 108 drives the scraper 109 to rotate. The scraper 109 scrapes the inner wall of the spray tank 100, thereby preventing the water vapor generated after the spraying treatment from staying on the inner wall of the spray tank 100 and condensing, affecting the subsequent spraying treatment, thereby ensuring the normal progress of the spraying treatment.

[0023] Embodiment 2, by Figure 3It is shown that a limit plate 107 is fixedly connected to the inner cavity of the spray tank 100, and a filter plate 110 is arranged on the top of the limit plate 107. The filter plate 110 is located at the bottom of the scraper 109 and the connecting column 108. A cleaning brush is fixedly connected to the bottom of the scraper 109. The limit plate 107 is used to support the filter plate 110. When the scraper 109 rotates, it can drive the cleaning brush at the bottom to clean the top of the filter plate 110, thereby avoiding the spray filter from clogging the top of the filter plate 110, thereby affecting the filtering effect.

[0024] Embodiment 3, by Figure 2 It is shown that a feed hole 112 is opened on the top of the filter plate 110 , and a filter receiving box 111 is slidably connected to the bottom of the feed hole 112 . The spray filter scraped off by the scraper 109 enters the filter receiving box 111 through the feed hole 112 .

[0025] Embodiment 4, by Figure 4 It is given that a front-to-rear symmetrical limiting slide 113 is fixedly connected to the bottom of the feed hole 112, and a sliding plate 114 is fixedly connected to the front and rear sides of the filter receiving box 111. The sliding plate 114 and the limiting slide 113 match each other. The filter receiving box 111 and the sliding plate 114 are slid by the limiting slide 113, so that the filter receiving box 111 can be disassembled and fixed, so as to clear the sprayed filter.

[0026] Embodiment 5, by Figure 2 It is shown that a mounting groove 106 is provided on the front side of the spray tank 100, a closed door 103 is fixedly connected to the inner cavity of the mounting groove 106, an observation window 105 is provided on the front side of the closed door 103, the closed door 103 is used to replace the filter plate 110, and the observation window 105 is used to observe the spray filter inside the filter receiving box 111.

[0027] Embodiment 6, by Figure 3 It is shown that the top of the spray tank 100 is arranged in an arc shape, and this design can avoid condensation of spray water vapor. The scraper 109 fits the inner cavity of the spray tank 100, and this design facilitates scraping off the water vapor.

[0028] Working principle: By adding a gas lift nitrogen pipeline 101, a stream of low-pressure nitrogen is introduced into the top of the spray tank 100, and the CO2 content in the semi-lean methanol liquid is reduced by gas lift, so that the semi-lean methanol liquid becomes a quasi-lean methanol liquid. The semi-lean methanol liquid is used for washing, which reduces energy consumption and appropriately reduces the CO2 content in the semi-lean liquid. The consumption of a small stream of low-pressure nitrogen for gas lift further reduces the temperature of the semi-lean liquid, increases the absorption capacity of the semi-lean liquid, and reduces energy consumption; at the same time, the motor 104 drives the connecting column 108 to rotate, and the rotation of the connecting column 108 drives the scraper 109 rotates, and the scraper 109 scrapes the inner wall of the spray tank 100, thereby preventing the water vapor generated after the spraying treatment from staying on the inner wall of the spray tank 100 and condensing, affecting the subsequent spraying treatment, thereby ensuring the normal progress of the spraying treatment; when the scraper 109 rotates, it can drive the cleaning brush at the bottom to clean the top of the filter plate 110, and the spray filter scraped by the scraper 109 enters the filter receiving box 111 through the feed hole 112, thereby preventing the spray filter from clogging the top of the filter plate 110, thereby affecting the filtering effect.

Claims

1. A low-temperature methanol washing spray device, comprising a spray tank (100), characterized in that: A uniformly distributed gas stripping nitrogen pipeline (101) is arranged on the right side of the top of the outer wall of the spray tank (100), and an air outlet pipe (102) is arranged on the left side of the bottom of the outer wall of the spray tank (100). An air inlet and a water outlet are respectively arranged at the upper left corner and the lower right corner of the front side of the spray tank (100). A motor (104) is arranged on the top of the spray tank (100), and a connecting column (108) is arranged at the output end of the motor (104). Scrapers (109) are arranged on the left and right sides of the connecting column (108), and the scrapers (109) and the connecting column (108) are both located in the inner cavity of the spray tank (100).

2. A low-temperature methanol washing spray device according to claim 1, characterized in that: The inner cavity of the spray tank (100) is provided with a limit plate (107), the top of the limit plate (107) is provided with a filter plate (110), the filter plate (110) is located at the bottom of the scraper (109) and the connecting column (108), and the bottom of the scraper (109) is provided with a cleaning brush.

3. A low-temperature methanol washing spray device according to claim 2, characterized in that: A material feed hole (112) is provided at the top of the filter plate (110), and a filter receiving box (111) is provided at the bottom of the material feed hole (112).

4. A low-temperature methanol washing spray device according to claim 3, characterized in that: A front-to-back symmetrical limiting slide plate (113) is provided at the bottom of the feed hole (112), and sliding plates (114) are provided at the front and back sides of the filter receiving box (111), and the sliding plates (114) match the limiting slide plate (113).

5. A low-temperature methanol washing spray device according to claim 2, characterized in that: The spray tank (100) is provided with a mounting groove (106) on the front side, a closed door (103) is provided in the inner cavity of the mounting groove (106), and an observation window (105) is provided on the front side of the closed door (103).

6. A low-temperature methanol washing spray device according to claim 5, characterized in that: The top of the spray tank (100) is arranged in an arc shape, and the scraper (109) fits in the inner cavity of the spray tank (100).

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