Low-temperature methanol washing tail gas treatment device and treatment process thereof

Abstract

The invention discloses a low-temperature methanol washing tail gas treatment device and a treatment process thereof, and relates to the technical field of waste gas treatment. According to the low-temperature methanol washing tail gas treatment device and the treatment process thereof, the low-temperature methanol washing tail gas treatment device comprises a treatment box, a gas inlet pipe which is communicated with the treatment box and is used for conveying low-temperature methanol washing tail gas to be treated, and a recycling box which is communicated with the treatment box and is used for recycling redundant heat energy and outputting superheated steam, the heat exchanger is fixed in the recycling box and used for absorbing heat released in the tail gas oxidation process; one end of the gas return pipe is communicated with the recycling box and used for conveying the tail gas after heat absorption, and the other end of the gas return pipe is communicated with the gas inlet pipe; a part of heat generated in the oxidation process of the low-temperature methanol washing tail gas is used for heating the heat storage ceramic in the treatment box, so that the treatment box can operate in a self-heating manner, the recycling box is used for recycling the other part of heat, middle-high pressure superheated steam is produced as a byproduct, and long-term cost saving and environmental protection benefits are brought to enterprises.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to a low-temperature methanol-washed tail gas treatment device and a treatment process thereof. Background Art

[0002] Low-temperature methanol washing is a process for purifying acidic gases (such as carbon dioxide CO2, hydrogen sulfide H2S, etc.), and is widely used in fields such as coal chemical industry and natural gas processing. The tail gas of existing low-temperature methanol washing devices has the characteristics of large air volume, high concentration, strong odor, and oxygen deficiency. At present, the tail gas of most low-temperature methanol washing devices is mixed with other low-concentration exhaust gases in the plant area and discharged directly into the atmosphere through the chimney, causing air pollution. In addition, the direct discharge of low-carbon hydrocarbons with a certain calorific value in the tail gas into the atmosphere will also waste the energy in the tail gas of the low-temperature methanol washing device. There are also methods to recover this part of the heat energy, but in the process of recovery, sensors and electric control valves are usually used to control the flow rate of the tail gas. These electrical components operate in a high-temperature environment for a long time, are prone to failure, and it is difficult to find the fault point.

[0003] For example, the energy-saving low-temperature methanol washing tail gas treatment device disclosed in Publication No. CN110594762B can reduce the occupied area and reduce the investment cost, but it still requires a high operating cost in the long term. In addition, when recovering heat energy, it relies on a combination of sensors and electronically controlled valves to control the exhaust flow rate, which is prone to failure and difficult to troubleshoot. The low-temperature methanol washing tail gas treatment device disclosed in Publication No. CN217568120U can effectively recover methanol from the tail gas, but during the treatment process, low-carbon hydrocarbons with a certain calorific value are wasted.

[0004] Therefore, a low-temperature methanol washing tail gas treatment device and a treatment process thereof are proposed. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a low-temperature methanol tail gas treatment device and a treatment process thereof, which solves the problems raised in the background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a low-temperature methanol-washed tail gas treatment device, comprising a treatment box, an air inlet pipe connected to the treatment box for conveying the low-temperature methanol-washed tail gas to be treated, and a recovery box connected to the treatment box for recovering excess heat energy and producing superheated steam, wherein the treatment box is provided with:

[0007] Thermal storage ceramics, fixed in the recovery box, are used to absorb the heat released during the oxidation process of exhaust gas;

[0008] A return air pipe, one end of which is connected to the recovery box for transporting the exhaust gas after heat absorption, and the other end of which is connected to the intake pipe;

[0009] A guide component for regulating the flow of exhaust gas into the recovery box is provided outside the recovery box, and the guide component includes:

[0010] The power motor is fixed to the bottom of the recycling box through the motor box to provide power to the guide assembly;

[0011] The expansion plate is slidably installed in the recovery box and changes the flow rate of the exhaust gas entering the recovery box under the drive of the power motor;

[0012] A sliding plate is slidably arranged in the expansion plate;

[0013] The deformable ring is fixed in the recovery box and cooperates with the sliding plate to improve the sealing performance of the expansion plate.

[0014] Preferably, the guide assembly further includes:

[0015] The output shaft, one end of which is fixed to the output end of the power motor and is used to transmit the power required for the operation of the guide component;

[0016] The power gear is fixed to the other end of the output shaft;

[0017] A transmission gear meshing with the power gear;

[0018] The transmission shaft has one end fixed on the side wall of the transmission gear and the other end movably mounted on the recovery box through a mounting plate to provide support for the transmission gear;

[0019] A driven gear meshing with the transmission gear;

[0020] One end of the driven shaft is fixed to the driven gear to provide support for the driven gear.

[0021] Preferably, the guide assembly further includes:

[0022] The reel is fixed to the other end of the driven shaft;

[0023] The steel belt is fixed on the winding wheel at both ends and wound on the winding wheel;

[0024] A guide block abuts against the side wall of the steel strip;

[0025] A fixed plate is fixed to one end of the guide block to provide support for the guide block;

[0026] The sliding rod has one end fixed on the side wall of the fixed plate and the other end fixed on the side wall of the expansion plate, providing support for the fixed plate and the expansion plate.

[0027] Preferably, the guide assembly further includes:

[0028] Spring 1, one end of which is fixed to the side wall of the fixed plate;

[0029] One end of the support plate is fixed in the recycling box, and the top is fixed to the other end of the spring 1 to provide support for the spring 1. One end of the sliding rod is slidably inserted into the support plate.

[0030] Preferably, the recovery box is further provided with a regulating component for controlling the discharge rate of superheated steam, and the regulating component includes:

[0031] A water storage tank is fixed in the recovery tank for containing heated water, and a guide plate for diverting exhaust gas is fixed on the side wall;

[0032] The circulation groove is opened at the bottom of the water tank to guide the high-temperature exhaust gas to circulate and increase the heating area;

[0033] A storage box, fixed in the water tank;

[0034] Positioning plate, slidably installed in the storage box.

[0035] Preferably, the control component further includes:

[0036] A guide rod, one end of which is fixed in the storage box and the other end of which slides out of the positioning plate to limit the moving direction of the positioning plate;

[0037] Spring 2, one end of which is fixed in the storage box and the other end is fixed to the positioning plate, providing elastic force for the positioning plate to reset;

[0038] The deformation plate abuts against the positioning plate, and its deformation under high temperature heating provides power for the displacement of the positioning plate;

[0039] A vertical rod, one end of which is fixed to the positioning plate and the other end of which slides out of the recycling box;

[0040] A toggle plate is fixed to the top of the vertical rod;

[0041] The sliding switch is fixed on the top of the recycling box, and controls the rotation direction of the power motor to change the state of the guide component when the toggle plate is turned.

[0042] Preferably, the recovery box is further provided with a diffusion component for assisting in regulating the discharge rate of superheated steam, and the diffusion component includes:

[0043] A connecting plate, one end of which is fixed to the vertical rod;

[0044] A sliding ring is fixed to the other end of the connecting plate;

[0045] The guide rod is slidably mounted on the sliding ring and its bottom is fixed in the water tank to limit the movement direction of the sliding ring;

[0046] The traction rod has one end hinged to the sliding ring through a hinge.

[0047] Preferably, the diffusion assembly further includes:

[0048] A diffuser plate is hinged to the other end of the drawbar through a hinge;

[0049] The bump is fixed on the diffuser plate and cooperates with the diffuser plate to change the speed of water flow throughout the water tank;

[0050] The rotating shaft is fixed on the diffuser plate to provide support for the diffuser plate;

[0051] The fixed rod is movably mounted on the rotating shaft, and one end of the fixed rod is fixed on the guide rod to provide support for the rotating shaft.

[0052] The present invention also provides a treatment process applicable to a low-temperature methanol-washed tail gas treatment device, comprising the following steps:

[0053] S1, using the air inlet pipe to transport the tail gas generated by the low-temperature methanol washing device into the treatment box;

[0054] S2. Oxidize the tail gas in the treatment box by using thermal storage incineration, and use thermal storage ceramics to store the heat energy generated during the oxidation process;

[0055] S3. The oxidized and heat-storage gas is transported to a recovery box for further heat recovery, and superheated steam is produced. During the heat recovery process, the flow rate of the exhaust gas entering the treatment box is changed by a guide component, thereby controlling the rate of superheated steam generation;

[0056] S4, a portion of the gas after heat recovery is transported back to the intake pipe through the return pipe, and then transported together with the exhaust gas to the treatment box;

[0057] S5. The remaining gas after heat recovery is discharged through the discharge tube to meet the standards.

[0058] Preferably, the angle variation range of the expansion plate driven by the power motor in the guide assembly is between 0-15°.

[0059] The present invention provides a low-temperature methanol tail gas treatment device and its treatment process. Compared with the existing technology, it has the following advantages:

[0060] (1) The low-temperature methanol washing tail gas treatment device and its treatment process transport the tail gas generated by the low-temperature methanol washing to the treatment box through the air inlet pipe, and oxidize the low-temperature methanol washing tail gas by heat storage incineration in the treatment box; a part of the heat generated during the oxidation of the low-temperature methanol washing tail gas heats the heat storage ceramic in the treatment box, so that the treatment box can operate with self-heating, and the other part of the heat enters the recovery box with the purified flue gas, and the recovery box is used to recover this part of the heat, and produces medium and high-pressure superheated steam as a by-product; a part of the low-temperature methanol washing tail gas that has absorbed the heat is recycled by the recirculation fan It is transported to the air inlet pipe through the return air pipe, and enters the treatment box again after mixing with the untreated low-temperature methanol washing tail gas behind it, and the other part of the low-temperature methanol washing tail gas is discharged through the discharge tube after meeting the standards; by controlling the flow of the low-temperature methanol washing tail gas entering the recovery box through the treatment box, the rate and pressure of the superheated steam output by the recovery box are controlled, which can prevent production interruptions or quality fluctuations caused by excessively high or low pressure, and bring long-term cost savings and environmental protection benefits to the enterprise. While purifying the low-temperature washing methanol tail gas efficiently and with low energy consumption, it produces stable medium and high-pressure superheated steam, thereby realizing the profitable operation of this device.

[0061] (2) The low-temperature methanol washing tail gas treatment device and its treatment process, in the process of using the recovery box to recover heat, the flow of water entering the recovery box and the state of the guide component are controlled by the mechanical structure according to the temperature in the recovery box; the amount of high-temperature tail gas entering the recovery box through the treatment box is adjusted by not using a combination of sensors and electric control valves, which reduces the complexity of the electric control system, has fewer electronic components and connections, reduces the difficulty of installation, reduces the number of failure points, and reduces maintenance costs, is not affected by electromagnetic interference (EMI), and avoids these electronic components working in a high-temperature state for a long time, and avoids the situation where the failure point is difficult to find after a failure occurs somewhere.

[0062] (3) The low-temperature methanol washing tail gas treatment device and its treatment process can synchronously change the opening angle of the diffusion plate during the process of deformation of the deformation plate to drive the state conversion of the guide component, thereby changing the speed at which water is distributed in the water storage tank, thereby changing the output rate and pressure of the superheated steam; controlling the water distribution speed ensures that the water flow is more evenly distributed in the entire recovery tank, avoiding local overheating or insufficient heating, and accurately adjusting the water flow rate so that the water can contact the high-temperature gas within the most appropriate time period, maximizing the use of input energy, reducing unnecessary heat loss, avoiding a sharp rise in pressure caused by the rapid generation of a large amount of steam, and reducing safety risks. During startup or shutdown, gradually adjusting the water distribution speed and high-temperature gas flow rate can achieve a smoother process conversion, reduce the impact on the system, and contribute to the safe operation, long life, and energy conservation and emission reduction of the equipment.

[0063] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0065] Figure 2 Another perspective view of the overall structure of the present invention;

[0066] Figure 3 Schematic diagram of the position of the output shaft of the present invention;

[0067] Figure 4 This is a cross-sectional structural diagram of the recycling box of the present invention;

[0068] Figure 5 is a structural diagram of the guide assembly of the present invention;

[0069] Figure 6 This is a schematic diagram of the position of the power motor of the present invention;

[0070] Figure 7 A cross-sectional structural diagram of one of the water storage tanks of the present invention;

[0071] Figure 8 It is a cross-sectional structural diagram of the storage box of the present invention;

[0072] Figure 9 This is a schematic diagram of the combined state of the diffusion component of the present invention;

[0073] Figure 10 Schematic diagram of the decomposition state of the diffusion component of the present invention;

[0074] Figure 11 For the present invention Figure 10 Enlarged view of point A in the middle.

[0075] Figure: 1, treatment box; 11, air intake pipe; 12, air return pipe; 13, recovery box; 2, power motor; 21, output shaft; 22, power gear; 23, transmission gear; 24, transmission shaft; 25, driven gear; 26, driven shaft; 27, take-up wheel; 28, steel belt; 29, guide block; 210, fixed plate; 211, sliding rod; 212, spring 1; 213, support plate; 214, expansion plate; 21 5. Sliding plate; 216. Deformation ring; 217. Guide plate; 3. Water tank; 31. Circulation slot; 32. Storage box; 33. Positioning plate; 34. Guide rod; 35. Spring 2; 36. Deformation plate; 37. Vertical rod; 38. Toggle plate; 39. Sliding switch; 4. Connecting plate; 41. Sliding ring; 42. Guide rod; 43. Traction rod; 44. Diffuser; 45. Bump; 46. Rotation shaft; 47. Fixing rod. DETAILED DESCRIPTION

[0076] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0077] See also Figures 1 to 11 , the present invention provides the following technical solutions:

[0078] Example 1: A low-temperature methanol-washed tail gas treatment device includes a treatment box 1, an air inlet pipe 11 connected to the treatment box 1 for conveying the low-temperature methanol-washed tail gas to be treated, and a recovery box 13 connected to the treatment box 1 for recovering excess heat energy and producing superheated steam. The treatment box 1 is provided with:

[0079] The outer wall of the heat storage ceramic is fixedly mounted in the recovery box 13 to absorb the heat released during the oxidation of the exhaust gas;

[0080] One end of the return air pipe 12 is connected to the recovery box 13 for transporting the exhaust gas after heat absorption, and the other end of the return air pipe 12 is connected to the intake pipe 11;

[0081] A guide assembly for regulating the flow of exhaust gas into the recovery box 13 is provided outside the recovery box 13. The guide assembly includes: a power motor 2, an output shaft 21, a power gear 22, a transmission gear 23, a transmission shaft 24, a driven gear 25, a driven shaft 26, a reel 27, a steel belt 28, a guide block 29, a fixed plate 210, a sliding rod 211, a spring 212, a support plate 213, an expansion plate 214, a sliding plate 215, and a deformation ring 216.

[0082] The outer wall of the power motor 2 is fixedly mounted on the bottom of the recovery box 13 through the motor box to provide power to the guide assembly;

[0083] One end of the output shaft 21 is fixedly mounted on the output end of the power motor 2 through a coupling to transmit the power required for the operation of the guide assembly;

[0084] The side wall of the power gear 22 is fixedly mounted on the other end of the output shaft 21;

[0085] The transmission gear 23 is meshed with the power gear 22;

[0086] One end of the transmission shaft 24 is fixedly mounted on the side wall of the transmission gear 23, and the other end of the transmission shaft 24 is movably mounted on the side wall of the mounting plate through a bearing. One end of the mounting plate is fixedly mounted on the outer wall of the recovery box 13. The transmission shaft 24 is used to provide support for the transmission gear 23;

[0087] The driven gear 25 is meshed with the transmission gear 23;

[0088] One end of the driven shaft 26 is fixedly mounted on the driven gear 25, and the driven shaft 26 provides support for the driven gear 25. The side wall of the driven shaft 26 is movably mounted in the recovery box 13 through a bearing.

[0089] The side wall of the winding wheel 27 is fixedly mounted on the other end of the driven shaft 26;

[0090] Both ends of the steel belt 28 are fixedly mounted on the winding wheel 27, and the steel belt 28 is wound around the winding wheel 27;

[0091] The side wall of the guide block 29 is arranged in an arc shape, and the arc-shaped side wall of the guide block 29 slides against the side wall of the steel belt 28;

[0092] The outer wall of the fixed plate 210 is fixedly mounted on one end of the guide block 29, and the fixed plate 210 provides support for the guide block 29;

[0093] One end of the sliding rod 211 is fixedly mounted on the side wall of the fixed plate 210, and the other end of the sliding rod 211 is fixedly mounted on the side wall of the expansion plate 214. The sliding rod 211 provides support for the fixed plate 210 and the expansion plate 214.

[0094] One end of the spring 1 212 is fixedly mounted on the side wall of the fixed plate 210;

[0095] One end of the support plate 213 is fixedly installed in the recycling box 13, and the top of the support plate 213 is fixedly connected to the other end of the spring 1 212. The support plate 213 provides support for the spring 1 212, and one end of the sliding rod 211 is slidably inserted into the support plate 213;

[0096] The outer wall of the expansion plate 214 is slidably mounted in the recovery box 13 and changes the flow rate of the exhaust gas entering the recovery box 13 under the drive of the power motor 2;

[0097] The sliding plate 215 is slidably disposed in the expansion plate 214;

[0098] One end of the deformable ring 216 is fixedly mounted in the recovery box 13 . One end of the deformable ring 216 abuts against the side wall of the expansion plate 214 and cooperates with the sliding plate 215 to improve the sealing performance of the expansion plate 214 .

[0099] When in use, the tail gas generated by low-temperature methanol washing is transported to the processing box 1 through the air inlet pipe 11, and the low-temperature methanol washing tail gas in the processing box 1 is oxidized by thermal incineration;

[0100] Part of the heat generated during the oxidation process of the low-temperature methanol-washed tail gas heats the heat storage ceramics in the treatment box 1, enabling the treatment box 1 to operate with self-heating. The other part of the heat enters the recovery box 13 along with the purified flue gas, and is recovered by the recovery box 13 to produce medium- and high-pressure superheated steam.

[0101] After the low-temperature methanol-washed tail gas has absorbed heat in the recovery box 13, a portion is transported to the intake pipe 11 through the return pipe 12 by the recirculation fan, and is mixed with the untreated low-temperature methanol-washed tail gas and then enters the treatment box 1 again. The other portion of the low-temperature methanol-washed tail gas is discharged through the discharge tube after meeting the standards.

[0102] When the low-temperature methanol-washed tail gas after thermal storage and incineration enters the recovery box 13, the power motor 2 is started according to the discharge rate and pressure of the superheated steam, and the power motor 2 drives the output shaft 21 to rotate, the output shaft 21 drives the power gear 22 to rotate, and the power gear 22 drives the transmission gear 23 to rotate. The transmission shaft 24 provides support for the transmission gear 23, and the transmission gear 23 drives the driven gear 25 to rotate. The driven gear 25 drives the driven shaft 26 to rotate, and the driven shaft 26 drives the winding wheel 27 to rotate, and the winding wheel 27 drives the steel belt 28 to move, so that the steel belt 28 is wound on the winding wheel 27 or unwound from the winding wheel 27;

[0103] During the winding process of the steel belt 28, the steel belt 28 squeezes the guide block 29 to move, and applies power to the guide block 29 toward the side where the expansion plate 214 is located. The guide block 29 drives the fixed plate 210 to move, and the fixed plate 210 drives the sliding rod 211 to move. The sliding rod 211 and the support plate 213 slide together, so that the support plate 213 guides and limits the sliding rod 211. The recovery box 13 provides a supporting force to the support plate 213. During the movement, the sliding rod 211 synchronously drives the expansion plate 214 to move, so that the expansion plate 214 gathers toward the center position with the hinge as the axis. During the gathering process of the expansion plate 214, the exposed part of the sliding plate 215 is reduced, so that the flow rate of the low-temperature methanol washing tail gas that can pass through the expansion plate 214 into the recovery box 13 is reduced;

[0104] During the process of releasing the steel strip 28, the spring 1 212 provides an elastic force to the fixed plate 210 away from the expansion plate 214, so that the fixed plate 210 can drive the expansion plate 214 to move synchronously via the sliding rod 211, so that the expansion plate 214 is expanded away from the center position with the hinge as the axis. During the process of expanding the expansion plate 214, the exposed portion of the sliding plate 215 increases, so that the flow rate of the low-temperature methanol washing tail gas that can pass through the expansion plate 214 into the recovery box 13 increases;

[0105] By changing the total amount of low-temperature methanol-washed tail gas that can enter the recovery box 13 at the expansion plate 214, the total amount of heat that can be obtained in the recovery box 13 is controlled, thereby controlling the rate and pressure of superheated steam generated by the recovery box 13, so that the superheated steam is in a stable output state, avoiding overheating or excessive pressure. During the deformation of the expansion plate 214, the deformation ring 216 can be squeezed to deform. After the expansion plate 214 completes the shape switching, the deformation ring 216 will reset to the preset shape after being heated, thereby pressing against the expansion plate 214 to improve the sealing performance.

[0106] Embodiment 2: This embodiment differs from Embodiment 1 in that: a regulating assembly for controlling the discharge rate of superheated steam is further provided in the recovery box 13, and the regulating assembly includes: a water storage tank 3, a flow slot 31, a storage box 32, a positioning plate 33, a guide rod 34, a second spring 35, a deformable plate 36, a vertical rod 37, a toggle plate 38, and a sliding switch 39;

[0107] The outer wall of the water storage tank 3 is fixedly mounted in the recovery tank 13 for containing heated water, and a set of guide plates 217 for diverting the exhaust gas are fixedly mounted on the side wall;

[0108] The flow groove 31 is provided at the bottom of the water storage tank 3 and is used to guide the high-temperature exhaust gas to flow and increase the heating area;

[0109] The bottom of the storage box 32 is fixedly installed in the water tank 3;

[0110] The outer wall of the positioning plate 33 is slidably mounted in the storage box 32;

[0111] One end of the guide rod 34 is fixedly mounted in the storage box 32, and the other end of the guide rod 34 slides out of the positioning plate 33. The guide rod 34 is used to limit the moving direction of the positioning plate 33.

[0112] One end of the second spring 35 is fixedly mounted in the storage box 32, and the other end of the second spring 35 is fixedly mounted on the positioning plate 33. The second spring 35 is used to provide elastic force for returning the positioning plate 33.

[0113] One end of the deformation plate 36 abuts against the positioning plate 33. The deformation plate 36 deforms under high temperature heating to provide power for the displacement of the positioning plate 33. The deformation plate 36 and the deformation ring 216 are both made of memory metal material.

[0114] One end of the vertical rod 37 is fixedly mounted on the positioning plate 33, and the other end of the vertical rod 37 slides out of the recovery box 13;

[0115] The bottom of the toggle plate 38 is fixedly mounted on the top of the vertical rod 37;

[0116] The bottom of the sliding switch 39 is fixedly mounted on the top of the recovery box 13 . When the sliding switch 39 is toggled by the toggle plate 38 , it controls the rotation direction of the power motor 2 to change the state of the guide assembly.

[0117] When in use, during the process of heat recovery using the recovery tank 13, the flow rate of water entering the recovery tank 13 and the state of the guide component are controlled according to the temperature in the recovery tank 13;

[0118] Water is delivered to the water storage tank 3 through the water inlet pipe, and the high-temperature exhaust gas output from the treatment tank 1 is used to heat the water in the water storage tank 3, thereby generating superheated steam, which is then delivered to the subsequent treatment process through the discharge pipe;

[0119] After entering the recovery tank 13, the high-temperature exhaust gas is divided into two parts. One part is guided by the guide plate 217 to form an upward airflow on both sides, thereby heating the water in the water storage tank 3 located above the recovery tank 13, and the other part heats the water in the water storage tank 3 located below the recovery tank 13.

[0120] These high-temperature gases flow through the flow slots 31 provided in the water tank 3 to the other side and are discharged through the discharge cylinder to meet the standards. The flow slots 31 increase the contact area between the high-temperature gases and the water tank 3, while reducing the number of equipment requiring maintenance and fully heating the water in the water tank 3.

[0121] At the same time, the heat is conducted into the storage box 32 to heat the storage box 32;

[0122] After the storage box 32 located above the recycling box 13 is heated, the deformable plate 36 is transformed into a pre-programmed memory shape after being heated. The deformation of the deformable plate 36 squeezes the positioning plate 33 to move. The positioning plate 33 and the guide rod 34 are slidably adapted to each other so that the positioning plate 33 can only move linearly along the guide rod 34 during the movement. During the movement of the positioning plate 33, the vertical rod 37 is synchronously moved, and the vertical rod 37 drives the toggle plate 38 to move, so that the toggle plate 38 toggles one of the sliding switches 39, so that the sliding switch 39 controls the power motor 2 to start, thereby reducing the diameter through which the low-temperature methanol exhaust gas can pass;

[0123] The installation position of the deformation plate 36 and the spring 2 35 in the storage box 32 below the recycling box 13 is the same as that of the spring 2 35. Figure 8 The positions shown are set oppositely;

[0124] After the storage box 32 located below the recycling bin 13 is heated, the deformable plate 36 is transformed into a pre-programmed memory shape after being heated. The deformation of the deformable plate 36 squeezes the positioning plate 33 to move. The positioning plate 33 and the guide rod 34 are slidably adapted to each other so that the positioning plate 33 can only move linearly along the guide rod 34 during the movement. During the movement of the positioning plate 33, the vertical rod 37 is synchronously moved, and the vertical rod 37 drives the toggle plate 38 to move, so that the toggle plate 38 toggles one of the sliding switches 39, so that the sliding switch 39 controls the power motor 2 to start, thereby increasing the diameter through which the low-temperature methanol exhaust gas can pass.

[0125] After the temperature changes, the deformable plate 36 can no longer transform to the pre-programmed memory shape. At this time, under the elastic force of the second spring 35, the positioning plate 33 is driven to reset, thereby squeezing the deformable plate 36 into the memory shape again. Figure 8 The arc shown.

[0126] Embodiment 3: This embodiment differs from Embodiment 2 in that: a diffusion assembly for assisting in regulating the discharge rate of superheated steam is further provided in the recovery box 13. The diffusion assembly includes: a connecting plate 4, a sliding ring 41, a guide rod 42, a traction rod 43, a diffusion plate 44, a protrusion 45, a rotating shaft 46, and a fixing rod 47.

[0127] One end of the connecting plate 4 is fixedly mounted on the vertical rod 37;

[0128] The side wall of the sliding ring 41 is fixedly mounted on the other end of the connecting plate 4;

[0129] The guide rod 42 is slidably provided on the sliding ring 41, and the bottom of the guide rod 42 is fixedly installed in the water storage tank 3. The guide rod 42 is used to limit the moving direction of the sliding ring 41;

[0130] One end of the traction rod 43 is hinged to the sliding ring 41 through a hinge;

[0131] The bottom of the diffuser plate 44 is hinged to the other end of the traction rod 43 through a hinge;

[0132] The protrusion 45 is fixedly mounted on the diffuser plate 44. The protrusion 45 cooperates with the diffuser plate 44 to change the speed of water flowing throughout the water tank 3.

[0133] One end of the rotating shaft 46 is fixedly mounted on the diffuser plate 44 to provide support for the diffuser plate 44;

[0134] The outer wall of the fixing rod 47 is movably mounted on the rotating shaft 46 via a bearing, and the other end of the fixing rod 47 is fixedly mounted on the guide rod 42 . The fixing rod 47 is used to provide support for the rotating shaft 46 .

[0135] During use, when the deformable plate 36 deforms to drive the guide assembly to switch states, the vertical rod 37 synchronously drives the connecting plate 4 to move, which in turn drives the sliding ring 41 to move. The sliding ring 41 and the guide rod 42 slide together, so that the sliding ring 41 can only move linearly during movement. When the sliding ring 41 moves, it drives the traction rod 43 to move, which in turn drives the diffusion plate 44 to move.

[0136] The rotating shaft 46 provides support for the diffuser 44, the fixed rod 47 provides support for the rotating shaft 46, the guide rod 42 provides support for the fixed rod 47, and the water tank 3 provides support for the guide rod 42. Driven by the traction rod 43, the diffuser 44 can be turned around the rotating shaft 46, thereby changing the angle of the diffuser 44.

[0137] By arranging a diffusion plate 44 directly below the water outlet of the water inlet pipe, water impacts the diffusion plate 44 and is broken by the protrusion 45, so that the water can spread more quickly in the water storage tank 3 to recover waste heat. By changing the opening angle of the diffusion plate 44, the speed at which the water spreads in the water storage tank 3 is changed, thereby changing the output rate and pressure of the superheated steam.

[0138] The embodiment of the present invention further provides a treatment process applicable to a low-temperature methanol washing tail gas treatment device, comprising the following steps:

[0139] S1, using the air inlet pipe 11 to transport the tail gas generated by the low-temperature methanol washing device into the processing box 1;

[0140] S2, oxidizing the tail gas in the treatment box 1 by means of thermal storage incineration, and storing the heat energy generated during the oxidation process with thermal storage ceramics;

[0141] S3, the gas after oxidation and heat storage is transported to the recovery box 13 for further heat recovery and superheated steam is produced. During the heat recovery process, the guide component is used to change the flow rate of the exhaust gas entering the processing box 1, thereby controlling the generation rate of superheated steam;

[0142] S4, a portion of the gas after heat recovery is transported back to the intake pipe 11 through the return pipe 12, and is transported together with the remaining exhaust gas into the treatment box 1 again;

[0143] S5. The remaining gas after heat recovery is discharged through the discharge tube to meet the standards.

[0144] This includes when the power motor 2 in the guide assembly drives the expansion plate 214 to change its angle, the range of change is between 0-15 degrees.

[0145] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0146] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0147] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature methanol-washed tail gas treatment device, comprising a treatment box (1), an air inlet pipe (11) connected to the treatment box (1) for conveying the low-temperature methanol-washed tail gas to be treated, and a recovery box (13) connected to the treatment box (1) for recovering excess heat energy and producing superheated steam, characterized in that: The processing box (1) is provided with: Thermal storage ceramics, fixed in the recovery box (13) for absorbing heat released during the oxidation process of the exhaust gas; A return air pipe (12), one end of which is connected to a recovery box (13) for conveying the exhaust gas after heat absorption, and the other end of the return air pipe (12) is connected to an intake pipe (11); A guide component for regulating the flow of tail gas entering the recovery box (13) is provided outside the recovery box (13), and the guide component includes: A power motor (2) is fixed to the bottom of the recovery box (13) through a motor box to provide power to the guide assembly; An expansion plate (214) is slidably mounted in the recovery box (13) and changes the flow rate of the exhaust gas entering the recovery box (13) under the drive of the power motor (2); A sliding plate (215) is slidably disposed in the expansion plate (214); The deformation ring (216) is fixed in the recovery box (13) and cooperates with the sliding plate (215) to improve the sealing performance of the expansion plate (214).

2. A low-temperature methanol washing tail gas treatment device according to claim 1, characterized in that: The guide component also includes: An output shaft (21), one end of which is fixed to the output end of the power motor (2) and is used to conduct the power required for the operation of the guide assembly; A power gear (22) is fixed to the other end of the output shaft (21); A transmission gear (23) meshed with the power gear (22); A transmission shaft (24) has one end fixed to the side wall of the transmission gear (23) and the other end movably mounted on the recovery box (13) through a mounting plate to provide support for the transmission gear (23); A driven gear (25) meshed with the transmission gear (23); One end of the driven shaft (26) is fixed on the driven gear (25) to provide support for the driven gear (25).

3. A low-temperature methanol washing tail gas treatment device according to claim 2, characterized in that: The guide component also includes: A reel (27) is fixed to the other end of the driven shaft (26); The steel belt (28) has both ends fixed on the winding wheel (27) and is wound on the winding wheel (27); A guide block (29) abuts against a side wall of the steel strip (28); A fixed plate (210) is fixed to one end of the guide block (29) to provide support for the guide block (29); The sliding rod (211) has one end fixed on the side wall of the fixed plate (210) and the other end fixed on the side wall of the expansion plate (214), providing support for the fixed plate (210) and the expansion plate (214).

4. A low-temperature methanol washing tail gas treatment device according to claim 3, characterized in that: The guide component also includes: Spring 1 (212), one end of which is fixed to the side wall of the fixed plate (210); One end of the support plate (213) is fixed in the recycling box (13), and the top is fixed to the other end of the spring (212) to provide support for the spring (212). One end of the sliding rod (211) is slidably arranged in the support plate (213).

5. The low-temperature methanol washing tail gas treatment device according to claim 1, characterized in that: The recovery box (13) is also provided with a regulating component for controlling the discharge rate of superheated steam, and the regulating component includes: A water storage tank (3) is fixed in the recovery tank (13) for containing heated water, and a guide plate (217) for diverting exhaust gas is fixed on the side wall; A circulation groove (31) is provided at the bottom of the water storage tank (3) to guide the high-temperature exhaust gas to circulate and increase the heating area; A storage box (32) is fixed in the water storage tank (3); The positioning plate (33) is slidably mounted in the storage box (32).

6. A low-temperature methanol washing tail gas treatment device according to claim 5, characterized in that: The control component also includes: A guide rod (34), one end of which is fixed in the storage box (32) and the other end of which slides out of the positioning plate (33) to limit the moving direction of the positioning plate (33); A second spring (35), one end of which is fixed in the storage box (32) and the other end of which is fixed on the positioning plate (33), provides elastic force for resetting the positioning plate (33); The deformation plate (36) is in contact with the positioning plate (33) and deforms under high temperature heating to provide power for the displacement of the positioning plate (33); A vertical rod (37), one end of which is fixed to the positioning plate (33) and the other end of which slides out of the recovery box (13); A toggle plate (38) is fixed to the top of the vertical rod (37); The sliding switch (39) is fixed on the top of the recovery box (13) and controls the rotation direction of the power motor (2) to change the state of the guide component under the toggle of the toggle plate (38).

7. A low-temperature methanol washing tail gas treatment device according to claim 6, characterized in that: The recovery box (13) is further provided with a diffusion component for assisting in regulating the discharge rate of superheated steam, the diffusion component comprising: A connecting plate (4), one end of which is fixed to the vertical rod (37); A sliding ring (41) is fixed to the other end of the connecting plate (4); A guide rod (42) is slidably mounted on the sliding ring (41) and has its bottom fixed in the water storage tank (3) to limit the movement direction of the sliding ring (41); One end of the traction rod (43) is hinged on the sliding ring (41) through a hinge.

8. A low-temperature methanol washing tail gas treatment device according to claim 7, characterized in that: The diffusion assembly further includes: A diffusion plate (44) is hinged to the other end of the traction rod (43) through a hinge; A projection (45) is fixed on the diffuser plate (44) and cooperates with the diffuser plate (44) to change the speed of water flowing throughout the water storage tank (3); A rotating shaft (46) is fixed on the diffuser plate (44) to provide support for the diffuser plate (44); The fixed rod (47) is movably mounted on the rotating shaft (46), and one end of the fixed rod is fixed on the guide rod (42) to provide support for the rotating shaft (46).

9. A treatment process for a low-temperature methanol tail gas treatment device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, using an air inlet pipe (11) to transport the tail gas generated by the low-temperature methanol washing device into a treatment box (1); S2, oxidizing the tail gas in the treatment box (1) by means of thermal storage incineration, and storing the heat energy generated during the oxidation process by means of thermal storage ceramics; S3, transporting the oxidized and heat-storing gas to a recovery box (13) for further heat recovery and producing superheated steam. During the heat recovery process, a guide component is used to change the flow rate of the tail gas entering the processing box (1), thereby controlling the generation rate of the superheated steam; S4, a portion of the gas after heat recovery is transported back to the intake pipe (11) through the return pipe (12), and transported together with the tail gas to the treatment box (1); S5. The remaining gas after heat recovery is discharged through the discharge tube to meet the standards.

10. The treatment process of a low-temperature methanol-washed tail gas treatment device according to claim 9, characterized in that: The angle variation range of the expansion plate (214) driven by the power motor (2) in the guide assembly is between 0 and 15 degrees.

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