Membrane method low-temperature methanol washing tail gas recovery treatment device

Abstract

The utility model belongs to the technical field of tail gas treatment, and particularly relates to a membrane method low-temperature methanol washing tail gas recovery treatment device which comprises a tail box and a support, a filtering mechanism is arranged in the tail box, and purification mechanisms are arranged in the tail box and on the outer wall of the tail box. According to the membrane-method low-temperature methanol washing tail gas recovery treatment device, by arranging the filtering mechanism, when tail gas enters the tail box, gas can be subjected to multi-layer filtering purification, so that the primary treatment efficiency of the tail gas is improved, the gas is more sufficiently purified through operation of a fan, and the service life of the tail gas is prolonged. The problem that in the background technology, due to the fact that the device is not prone to conducting multi-layer purification on tail gas, the tail gas recovery efficiency is affected to a certain degree is solved, the purification mechanism is arranged, the primarily-purified gas is subjected to atomization adhesion treatment in an atomization spraying mode, and the tail gas recovery efficiency is improved. Impurities in gas can be treated in a liquid adhesion mode, and are purified by the purifier and then recovered, so that the recovery quality of tail gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a membrane method low-temperature methanol washing tail gas recovery and treatment device. Background Art

[0002] Low-temperature methanol washing process is widely used in purification processes such as coal-to-natural gas, coal-to-methanol, and coal-to-oil. This process absorbs and dissolves acid gases such as H2S, CO2, and various organic sulfides, NH3, C2H2, C3 and gaseous hydrocarbons above C3, colloids and water vapor in the raw gas at low temperature (-50°C) through methanol liquid, thereby achieving the purpose of purifying the raw gas. Low-temperature methanol washing needs to release the impurity gas dissolved in methanol through flash evaporation, stripping, heating treatment and other steps to regenerate methanol for recycling. The waste gas generated by flash evaporation usually includes a hydrocarbon mixture rich in CO2 acid gas. Since the concentration of hydrocarbon components in this type of gas is low, its direct use value is not high.

[0003] At present, it is usually directly discharged as waste gas, which not only leads to a large amount of resource waste, but also causes environmental pollution.

[0004] A membrane-based low-temperature methanol washing tail gas treatment device is proposed in the patent document with publication number CN213077967U. The device includes a flash tank for flashing the methanol absorption liquid after the raw coal gas washing; a CO2 separation membrane connected to the flash tank for membrane separation of the hydrocarbon-containing CO2 gas obtained in the flash tank, so that the CO2 in the gas can pass through and the hydrocarbons can be retained; an oxidation combustion furnace connected to the permeation side of the CO2 separation membrane for oxidizing the CO2 gas obtained on the permeation side to remove the combustible gas components. Carbon dioxide is separated from combustible components such as hydrocarbons through membrane separation, and effective gas is recycled and utilized, which reduces the content of hydrocarbon components in the exhaust gas and improves the hydrocarbon recovery rate of the low-temperature methanol washing process. This method not only recovers high-value combustible components such as hydrocarbons, but also greatly reduces the processing pressure of the oxidation combustion section due to the separation of carbon dioxide in the exhaust gas, ensuring that the emission requirements are met.

[0005] However, it is not easy for the device to perform multi-layer purification on the tail gas, which has a certain impact on the efficiency of tail gas recovery.

[0006] To this end, we urgently need to provide a membrane-based low-temperature methanol washing tail gas recovery and treatment device. Utility Model Content

[0007] The utility model aims to provide a membrane method low-temperature methanol washing tail gas recovery and treatment device to solve the problem proposed in the above background technology that the device is not easy to perform multi-layer purification on the tail gas, thereby causing a certain impact on the efficiency of tail gas recovery.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a membrane-based low-temperature methanol washing tail gas recovery and treatment device, comprising a tail box and a support, the support is installed at the bottom of the tail box, a filtering mechanism is arranged inside the tail box, and a purification mechanism is arranged inside and on the outer wall of the tail box.

[0009] The filtering mechanism comprises a blowing unit and a processing unit.

[0010] The processing unit includes a fixed rail, a first filter, a second filter, a connecting plate, a handle and a fixing bolt. The fixed rail is fixedly installed on the inner wall of the trunk. The first filter and the second filter are arranged inside the trunk. The connecting plate is installed on the top of the first filter and the second filter. The handle is fixedly installed on the top of the connecting plate. The fixing bolt is connected to the fixed end of the connecting plate.

[0011] Preferably, the blowing unit includes a top plate and a fan, the top plate is fixedly mounted on the top of the tail box, and the fan is installed inside the top plate.

[0012] Preferably, the purification mechanism includes a fixed seat, a spray box, a conduit, a delivery pipe, an atomizing nozzle, a purifier and a connecting pipe. The fixed seat is fixedly installed on the side of the trunk, the spray box is installed on the top of the fixed seat, the conduit is connected to the top of the spray box, the delivery pipe is connected to the inside of the spray box, the atomizing nozzle is installed at the other end of the delivery pipe, the purifier is installed on the side end of the trunk, and the connecting pipe is connected to the discharge end of the purifier.

[0013] Preferably, the support is distributed at an oblique angle at the bottom of the trunk, so that the support can support the trunk more stably, and the connecting ends of the first filter screen and the second filter screen are abutted against the outer wall of the fixed rail and slidably connected, which facilitates the rapid installation and replacement of the first filter screen and improves the practical performance of the device.

[0014] Preferably, the mesh diameters of the first filter and the second filter are different, so that the exhaust gas can be filtered in multiple layers. The connecting plate is fixed to the top of the trunk by a fixing bolt, which facilitates the fixation of the first filter and the second filter, thereby improving the stability of the exhaust gas treatment.

[0015] Preferably, the other end of the delivery pipe passes through the top of the tail box and is connected to an atomizing nozzle, so as to facilitate atomizing spray treatment of the preliminarily treated exhaust gas. The atomizing nozzle and the intake pipe are in the same vertical plane, thereby improving the atomizing treatment efficiency of the exhaust gas.

[0016] Preferably, a small water pump is provided inside the spray box, and the output end of the water pump is connected to one end of a delivery pipe. Through the operation of the small water pump, the spray liquid inside the spray box can be transported through the delivery pipe to the atomizing nozzle for spraying, thereby improving the purification efficiency of the exhaust gas and enabling it to be recovered more safely.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The membrane-based low-temperature methanol washing tail gas recovery and treatment device, by setting a filtering mechanism, can perform multi-layer filtering and purification on the gas when the tail gas enters the tail box, thereby improving the initial treatment efficiency of the tail gas, and also utilizing the operation of the fan to make the gas more fully purified, solving the problem mentioned in the background technology that the device is not easy to perform multi-layer purification on the tail gas, thereby causing a certain impact on the efficiency of tail gas recovery.

[0019] 2. The membrane-based low-temperature methanol washing tail gas recovery and treatment device, by setting up a purification mechanism, adopts an atomization spray method to perform atomization adhesion treatment on the preliminarily purified gas, and can treat impurities in the gas by liquid adhesion, and finally purify it through a purifier and then recover it, thereby improving the recovery quality of the tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the filter mechanism structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the spray unit of the utility model.

[0024] In the figure: 1, tail box; 2, support; 301, top plate; 302, fan; 303, fixed rail; 304, first filter; 305, second filter; 306, connecting plate; 307, handle; 308, fixing bolt; 401, fixing seat; 402, spray box; 403, conduit; 404, delivery pipe; 405, atomizing nozzle; 406, purifier; 407, connecting pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0027] Embodiment 1:

[0028] A membrane-based low-temperature methanol washing tail gas recovery and treatment device comprises a tail box 1 and a support 2. The support 2 is installed at the bottom end of the tail box 1. The support 2 is distributed at an oblique angle at the bottom end of the tail box 1, so that the support 2 can support the tail box 1 more stably. A filtering mechanism is arranged inside the tail box 1, and a purification mechanism is arranged inside and on the outer wall of the tail box 1.

[0029] The filtering mechanism includes a blowing unit and a processing unit.

[0030] The processing unit includes a fixed rail 303, a first filter screen 304, a second filter screen 305, a connecting plate 306, a handle 307 and a fixing bolt 308. The fixed rail 303 is fixedly installed on the inner wall of the trunk 1. The first filter screen 304 and the second filter screen 305 are arranged inside the trunk 1. The connecting ends of the first filter screen 304 and the second filter screen 305 abut against the outer wall of the fixed rail 303 and are slidably connected, so that the first filter screen 304 and the second filter screen 305 can be quickly installed and replaced, thereby improving the practicality of the device. In order to improve the performance, the first filter 304 and the second filter 305 have different mesh diameters, so that the exhaust gas can be filtered in a multi-layered manner. The connecting plate 306 is installed on the top of the first filter 304 and the second filter 305. The connecting plate 306 is fixed to the top of the tail box 1 through the fixing bolt 308, which is convenient for fixing the first filter 304 and the second filter 305, thereby improving the stability of the exhaust gas treatment. The handle 307 is fixedly installed on the top of the connecting plate 306, and the fixing bolt 308 is connected to the fixed end of the connecting plate 306.

[0031] Embodiment 2:

[0032] On the basis of the first embodiment: the blowing unit includes a top plate 301 and a fan 302 . The top plate 301 is fixedly mounted on the top of the tail box 1 , and the fan 302 is installed inside the top plate 301 .

[0033] The purification mechanism includes a fixed seat 401, a spray box 402, a conduit 403, a delivery pipe 404, an atomizing nozzle 405, a purifier 406 and a connecting pipe 407. The fixed seat 401 is fixedly installed on the side of the tail box 1, the spray box 402 is installed at the top of the fixed seat 401, the conduit 403 is connected to the top of the spray box 402, the delivery pipe 404 is connected to the inside of the spray box 402, and the other end of the delivery pipe 404 passes through the top of the tail box 1 and is connected to the atomizing nozzle 405, so as to facilitate the atomization spray treatment of the preliminarily treated exhaust gas. The atomizing nozzle 405 is installed at the other end of the delivery pipe 404. The atomizing nozzle 405 and the intake pipe are in the same vertical plane, which improves the atomization treatment efficiency of the exhaust gas. The purifier 406 is installed at the side end of the tail box 1, and the connecting pipe 407 is connected to the discharge end of the purifier 406.

[0034] Embodiment three: A small water pump is provided inside the spray box 402, and the output end of the water pump is connected to one end of the delivery pipe 404. Through the operation of the small water pump, the spray liquid inside the spray box 402 can be transported to the atomizing nozzle 405 through the delivery pipe 404 for spraying, thereby improving the purification efficiency of the exhaust gas and enabling it to be recovered more safely.

[0035] When in use, the exhaust gas enters the interior of the tail box 1 through the air intake pipe, and the connecting plate 306 is fixed to the top of the tail box 1 by the fixing bolt 308, so that the first filter 304 and the second filter 305 preliminarily perform multi-layer purification and filtration treatment on the exhaust gas, and utilize the operation of the fan 302 to make the gas more fully processed. After the preliminary filtration treatment, the small water pump inside the spray box 402 is operated, so that the extracted spray liquid is transported to the atomizing nozzle 405 through the delivery pipe 404, so that the preliminarily treated gas is sprayed and adsorbed, and the final purification treatment is carried out through the purifier 406, so as to facilitate the recovery of the purified exhaust gas.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A membrane-based low-temperature methanol washing tail gas recovery and treatment device, comprising a tail box (1) and a support (2), wherein the support (2) is installed at the bottom end of the tail box (1), and is characterized in that: A filtering mechanism is provided inside the tail box (1), and a purification mechanism is provided inside and on the outer wall of the tail box (1); The filtering mechanism includes a blowing unit and a processing unit; The processing unit comprises a fixed rail (303), a first filter screen (304), a second filter screen (305), a connecting plate (306), a handle (307) and a fixing bolt (308); the fixed rail (303) is fixedly mounted on the inner wall of the trunk (1); the first filter screen (304) and the second filter screen (305) are arranged inside the trunk (1); the connecting plate (306) is mounted on the top of the first filter screen (304) and the second filter screen (305); the handle (307) is fixedly mounted on the top of the connecting plate (306); and the fixing bolt (308) is connected to the fixed end of the connecting plate (306).

2. A membrane method low temperature methanol washing tail gas recovery and treatment device according to claim 1, characterized in that: The blowing unit comprises a top plate (301) and a fan (302); the top plate (301) is fixedly mounted on the top of the tail box (1); and the fan (302) is mounted inside the top plate (301).

3. A membrane method low temperature methanol washing tail gas recovery and treatment device according to claim 1, characterized in that: The purification mechanism comprises a fixed seat (401), a spray box (402), a conduit (403), a delivery pipe (404), an atomizing nozzle (405), a purifier (406) and a connecting pipe (407); the fixed seat (401) is fixedly mounted on the side of the tail box (1); the spray box (402) is mounted on the top of the fixed seat (401); the conduit (403) is connected to the top of the spray box (402); the delivery pipe (404) is connected to the inside of the spray box (402); the atomizing nozzle (405) is mounted on the other end of the delivery pipe (404); the purifier (406) is mounted on the side end of the tail box (1); and the connecting pipe (407) is connected to the discharge end of the purifier (406).

4. A membrane method low temperature methanol washing tail gas recovery and treatment device according to claim 1, characterized in that: The support (2) is distributed at an oblique angle at the bottom of the tail box (1), and the connecting ends of the first filter screen (304) and the second filter screen (305) are in contact with the outer wall of the fixed rail (303) and are slidably connected.

5. The membrane method low-temperature methanol washing tail gas recovery and treatment device according to claim 1 is characterized in that: The first filter screen (304) and the second filter screen (305) have different mesh diameters, and the connecting plate (306) is fixed to the top of the tail box (1) via a fixing bolt (308).

6. A membrane method low temperature methanol washing tail gas recovery and treatment device according to claim 3, characterized in that: The other end of the delivery pipe (404) passes through the top of the tail box (1) and is connected to the atomizing nozzle (405), and the atomizing nozzle (405) and the air intake pipe are in the same vertical plane.

7. The membrane method low temperature methanol washing tail gas recovery and treatment device according to claim 3 is characterized by: A small water pump is arranged inside the spray box (402), and the output end of the water pump is connected to one end of the delivery pipe (404).

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