Device for removing harmful gas and recycling CO2 in tail gas of natural gas generator set

Abstract

The invention provides a natural gas generator set tail gas harmful gas removal and CO2 recycling device which comprises a filtering tank, a filtering mechanism is arranged in the filtering tank and comprises a plurality of long-strip-shaped hollowed-out filtering belts, and a cleaning box and an air drying mechanism are arranged on the two sides of each filtering belt. The filter belt penetrates through the cleaning box, the two ends of the filter belt are located below the air drying mechanism, and the middle of the filter belt is a filter working area. According to the device for removing the harmful gas in the tail gas of the natural gas generator set and recycling the CO2, the tail gas is filtered before and after the harmful gas in the tail gas is removed, and the filter belt can be self-cleaned and air-dried in the operation process, so that the efficient and high-quality filtering effect can be always kept; and the quality of the gas after the tail gas is removed subsequently is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of CO2 recovery, and particularly to a device for removing harmful gases from the tail gas of a natural gas generator set and recycling CO2. Background Technique

[0002] Carbon dioxide is the "culprit" causing the "greenhouse effect" and leading to global warming, but it is also an essential basic raw material for crop growth. With the progress of technology and the improvement of living standards, agriculture has gradually become industrialized, pursuing the input-output ratio, and various new technologies have been applied in agriculture. The CO2 gas fertilizer technology is one of them.

[0003] With the rapid growth of China's economy and the urgent need for energy transformation, the consumption of natural gas has been increasing day by day. In view of the waste of resources and environmental pollution caused by the direct emission of natural gas tail gas into the atmosphere, this project proposes the application of tail gas CO2 in agricultural greenhouses taking the combined heat and power supply of natural gas generator sets as an example, designs a scheme for removing harmful gases and recovering CO2 from gas generator sets, uses natural gas for power generation, heating and gas supply, the electricity is used for supplementary lighting and grid connection, the jacket water and the heat of the tail gas are used for greenhouse heating, and the clean CO2 obtained after the treatment of the tail gas is used for greenhouse gas fertilizer. The application of the combined heat and power supply tail gas CO2 of natural gas generator sets in agricultural greenhouses can enhance the disease resistance of crops, reduce the amount of pesticide used, increase soil organic matter, improve the quality and yield of products, enhance the economic benefits of agriculture, and achieve high-quality development. It can reduce energy waste, better serve China's "dual carbon" goal, and is of great significance for China to develop a low-carbon economy and achieve energy conservation and emission reduction. When collecting carbon dioxide currently, no filtering structure is installed inside the collection barrel, so that dust may be contained in the tail gas during collection, and the effect of gas collection is not good, which is not convenient for subsequent removal of harmful gases in the tail gas.

[0004] To solve the above problems, this case came into being. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] The purpose of the present invention is to provide a device for removing harmful gases from the tail gas of a natural gas generator set and recycling CO2 to solve the problems raised in the above background technique.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the present invention is realized by the following technical solutions: A device for removing harmful gases from the tail gas of a natural gas generator set and recycling CO2 includes a filter tank. A filtering mechanism is provided inside the filter tank. The filtering mechanism includes a filter belt provided with a number of long strip-shaped hollow openings. Cleaning tanks and air drying mechanisms are provided on both sides of the filter belt. The filter belt passes through the cleaning tank and both ends are located below the air drying mechanism. The middle position of the filter belt is the filtering working area.

[0009] Preferably, support rods are provided inside both ends of the filter belt. The support rods tighten the filter belt. A driving wheel is provided in the middle of the filter belt. Convex strips are provided on the driving wheel and are engaged with the hollow openings on the filter belt.

[0010] Preferably, through grooves are provided on the cleaning tank. The filter belt passes through the through grooves. After both ends of the filter belt pass through the through grooves, they are located below the air drying mechanism.

[0011] Preferably, a drainage plate is fixedly provided on the outer side of the lower end of the cleaning tank. The drainage plate is inclined. The lower end of the drainage plate closely abuts against the inner wall of the filter tank. A liquid outlet is provided at the position where the lower end of the drainage plate closely abuts against the inner wall.

[0012] Preferably, the air drying mechanism includes a fan plate. The fan plate is hollow. A number of fan groups are provided at the hollow openings. When the fan groups are started, the air flow is blown from top to bottom. A sealing plate is fixedly provided on the side of the fan plate close to the inside of the filter tank. The sealing plate is in the shape of "7". The vertical part of the sealing plate is fixedly arranged with the fan plate. The horizontal part of the sealing plate is fixedly connected with the inner wall of the filter tank. An air inlet is provided at the corresponding part of the inner wall of the filter tank and the sealing plate.

[0013] Preferably, a liquid outlet pipe is connected to the upper end face of the cleaning tank. A liquid inlet pipe is connected to the lower end face of the cleaning tank. The liquid outlet pipe passes through the top of the filter tank. The liquid inlet pipe passes through the liquid outlet.

[0014] Preferably, a pair of guiding plates are provided below the filter belt. The guiding plates are symmetrically arranged in the shape of "eight". A plurality of layers of rubber strips are provided at the upper ends of the guiding plates in contact with the filter belt. The lower ends of the guiding plates are fixedly connected with the inner wall of the filter tank. The guiding plates as a whole are located below the cleaning tank.

[0015] (III) Beneficial effects

[0016] After adopting the above technical solutions, compared with the prior art, the present invention has the following advantages: The device for removing harmful gases from the tail gas of a natural gas generator set and recycling CO2 of the present invention filters the tail gas before removing harmful gases. The filter belt can complete self-cleaning and air drying of the filter belt during operation, so that the filtering can always maintain an efficient and high-quality filtering effect, and improves the gas quality of the tail gas after removal. Description of the drawings

[0017] Figure 1 This is a schematic structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the air-drying mechanism;

[0019] Figure 3 This is a schematic diagram of the cleaning tank;

[0020] Figure 4 This is a schematic diagram of the back and the whole;

[0021] Figure 5 This is a conventional exhaust gas recovery and utilization diagram;

[0022] In the figure: 1 is a filter tank, 2 is a filter belt, 3 is a cleaning tank, 31 is a through slot, 32 is a drainage plate, 33 is a liquid outlet, 34 is a liquid outlet pipe, 35 is a liquid inlet pipe, 4 is an air-drying mechanism, 41 is a fan plate, 42 is a fan group, 43 is a sealing plate, 44 is an air inlet, 5 is a support rod, 6 is a driving wheel, 61 is a rib, 7 is a guiding plate, 71 is a multi-layer rubber strip. Detailed implementation manners

[0023] The present invention will be further elaborated in detail below with reference to the drawings and embodiments.

[0024] An embodiment of the present invention provides a device for removing harmful gases from the exhaust gas of a natural gas generator set and recovering and utilizing CO2, as Figures 1-4 shown, which includes a filter tank 1. A filtering mechanism is provided inside the filter tank 1. The filtering mechanism includes a filter belt 2 provided with a plurality of long strip-shaped hollow openings. A cleaning tank 3 and an air-drying mechanism 4 are provided on both sides of the filter belt 2. The filter belt 2 passes through the cleaning tank 3 and both ends are located below the air-drying mechanism 4. The middle position of the filter belt 2 is the filtering working area. It should be noted that after the long strip-shaped hollow openings of the filter belt 2 are provided, a plurality of long strips for filtering are formed on the filter belt 2. Soft hairs are provided on the long strips to achieve the filtering effect and do not affect the driving of the driving wheel 6. A through slot 31 is provided on the cleaning tank 3, and the filter belt 2 passes through the through slot 31. After both ends of the filter belt 2 pass through the through slot 31, they are located below the air-drying mechanism 4.

[0025] Refer to the attached Figure 1 , support rods 5 are provided inside both ends of the filter belt 2. The support rods 5 tighten the filter belt 2. Both ends of the support rods 5 are pivotally connected to the inner wall of the filter tank 1. The support rods 5 can rotate. A driving wheel 6 is provided in the middle of the filter belt 2. A rib 61 is provided on the driving wheel 6 and is engaged with the hollow openings on the filter belt 2 to drive the filter belt 2 through the driving wheel 6.

[0026] Refer to the attached Figure 1 , 3, a drainage plate 32 is fixedly installed on the outer side of the lower end of the cleaning tank 3. The drainage plate 32 is inclined, and the lower end of the drainage plate 32 is close to the inner wall of the filter tank 1. An outlet 33 is opened at the inner wall where the lower end of the drainage plate 32 is close to. A liquid outlet pipe 34 is connected to the upper end surface of the cleaning tank 3, and a liquid inlet pipe 35 is connected to the lower end surface of the cleaning tank 3. The liquid outlet pipe 34 passes through the top of the filter tank 1, and the liquid inlet pipe 35 passes through the outlet 33. Due to the setting of the through groove 31, during the rotation of the filter belt 2, water will overflow from the through groove 31. The drainage plate 32 is used to collect the water overflowing from the through groove 31 and discharge it from the outlet 33. The liquid outlet pipe 34 and the liquid inlet pipe 35 are used to realize the replacement of the cleaning water in the cleaning tank 3.

[0027] Reference appendix Figures 1-2 , the air drying mechanism 4 includes a fan plate 41. The fan plate 41 is hollowed out, and a number of fan groups 42 are provided at the hollowed-out part. When the fan groups 42 are started, the air flow is blown from top to bottom. A sealing plate 43 is fixedly installed on the side of the fan plate 41 close to the inside of the filter tank 1. The sealing plate 43 is in the shape of "7". The vertical part of the sealing plate 43 is fixedly arranged with the fan plate 41, and the horizontal part of the sealing plate 43 is fixedly connected to the inner wall of the filter tank 1. An air inlet 44 is opened at the corresponding part of the inner wall of the filter tank 1 and the sealing plate 43. The setting of the sealing plate 43 effectively prevents the tail gas from leaking from the air inlet 44. The fan groups 42 suck air from the air inlet 44 to complete the air drying of the filter belt 2 and part of the cleaning work.

[0028] Reference appendix Figure 1 , a pair of guiding plates 7 are provided below the filter belt 2. The guiding plates 7 are symmetrically arranged in the shape of "eight". A plurality of layers of rubber strips 71 are provided at the upper ends of the guiding plates 7 to contact the filter belt 2. The multiple layers of rubber strips play a sealing role to prevent the tail gas from leaking. The lower ends of the guiding plates 7 are fixedly connected to the inner wall of the filter tank 1, and the guiding plates 7 are entirely located below the cleaning tank 3.

[0029] For the scheme of treating the tail gas of a natural gas generator set, it is usually to first enter the oxidation reactor, then enter the SCR system, then cool down and recover heat, and then filter the dust of the remaining tail gas. The filtered tail gas containing CO2 is introduced into the greenhouse and participates in photosynthesis as a gas fertilizer to improve the agricultural product. In the present invention, dust filtration can be set at two positions, before the tail gas enters the oxidation reactor and after cooling down and recovering heat, to improve the quality of the CO2 finally introduced into the greenhouse. It should be noted that the specifications of the filter belts 2 in the two filter mechanisms set in the present invention are inconsistent to achieve a better filtering effect.

[0030] An apparatus for removing harmful gases from the exhaust gas of a natural gas generator set and recycling CO2. Before removing harmful gases from the exhaust gas, it is filtered. The filter belt can complete self-cleaning and air-drying of the filter belt during operation, enabling the filter to always maintain an efficient and high-quality filtering effect, improving the quality of the gas after the subsequent removal of harmful gases from the exhaust gas. By referring to traditional CO2 recycling technologies, a scheme for removing harmful gases and recycling CO2 from a gas generator set is designed. After treatment, the exhaust gas yields clean CO2 for use as greenhouse gas fertilizer, turning waste into treasure, protecting the environment, and achieving high-quality development.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for removing harmful gases from the tail gas of a natural gas generating unit and recycling CO2, comprising a filter tank (1), characterized in that: A filtering mechanism is provided inside the filtering tank (1). The filtering mechanism includes a filtering belt (2) provided with a number of long strip-shaped hollow openings. On both sides of the filtering belt (2), there are a cleaning tank (3) and a drying mechanism (4). The filtering belt (2) passes through the cleaning tank (3) and both ends are located below the drying mechanism (4). The middle position of the filtering belt (2) is the filtering working area.

2. The device for removing harmful gases from the tail gas of a natural gas generator set and recycling CO2 according to claim 1, wherein: Support rods (5) are provided inside both ends of the filtering belt (2). The support rods (5) tighten the filtering belt (2). A driving wheel (6) is provided in the middle of the filtering belt (2). Convex strips (61) are provided on the driving wheel (6) and are engaged with the hollow openings on the filtering belt (2).

3. The harmful gas removal and CO2 recycling device for the tail gas of a natural gas generating unit according to claim 1, wherein: A through groove (31) is provided on the cleaning tank (3). The filtering belt (2) passes through the through groove (31). After both ends of the filtering belt (2) pass through the through groove (31), they are located below the drying mechanism (4).

4. A device for removing harmful gases from the tail gas of a natural gas generator set and recycling CO2 according to claim 3, characterized in that: A drainage plate (32) is fixedly provided on the outer side of the lower end of the cleaning tank (3). The drainage plate (32) is inclined. The lower end of the drainage plate (32) is closely adjacent to the inner wall of the filtering tank (1). A liquid outlet (33) is opened at the inner wall where the lower end of the drainage plate (32) is closely adjacent.

5. A device for removing harmful gases from the tail gas of a natural gas generator set and recycling CO2 according to claim 3, characterized in that: The drying mechanism (4) includes a fan plate (41). The fan plate (41) is hollow, and a number of fan groups (42) are provided at the hollow part. When the fan groups (42) are started, the air flow is blown from top to bottom. A sealing plate (43) is fixedly provided on the side of the fan plate (41) close to the inside of the filtering tank (1). The sealing plate (43) is in the shape of "7". The vertical part of the sealing plate (43) is fixedly arranged with the fan plate (41). The horizontal part of the sealing plate (43) is fixedly connected to the inner wall of the filtering tank (1). An air inlet (44) is opened at the corresponding part of the inner wall of the filtering tank (1) and the sealing plate (43).

6. The harmful gas removal and CO2 recovery and utilization device for the tail gas of a natural gas generating unit according to claim 4, characterized in that: A liquid outlet pipe (34) is connected to the upper end surface of the cleaning tank (3). A liquid inlet pipe (35) is connected to the lower end surface of the cleaning tank (3). The liquid outlet pipe (34) passes through the top of the filtering tank (1). The liquid inlet pipe (35) passes through the liquid outlet (33).

7. A device for removing harmful gases from the tail gas of a natural gas generator set and recycling CO2 according to claim 1, characterized in that: A pair of guiding plates (7) are provided below the filtering belt (2). The guiding plates (7) are symmetrically arranged in the shape of "eight". Multiple layers of rubber strips (71) are provided at the upper ends of the guiding plates (7) and are in contact with the filtering belt (2). The lower ends of the guiding plates (7) are fixedly connected to the inner wall of the filtering tank (1). The guiding plates (7) as a whole are located below the cleaning tank (3).

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