A low-temperature methanol washing tail gas treatment device and its treatment process

Abstract

This invention discloses a low-temperature methanol wash tail gas treatment device and its treatment process, relating to the field of waste gas treatment technology. The low-temperature methanol wash tail gas treatment device and its treatment process include a treatment tank, an inlet pipe connected to the treatment tank for conveying the low-temperature methanol wash tail gas to be treated, and a recovery tank connected to the treatment tank for recovering excess heat energy and producing superheated steam. The treatment tank contains: a heat storage ceramic, fixed in the recovery tank to absorb the heat released during the tail gas oxidation process; and a return gas pipe, one end of which is connected to the recovery tank for conveying the heat-absorbed tail gas, and the other end of which is connected to the inlet pipe. Part of the heat generated during the oxidation of the low-temperature methanol wash tail gas heats the heat storage ceramic in the treatment tank, enabling the treatment tank to operate under self-heating. The recovery tank recovers another portion of the heat, producing medium- and high-pressure superheated steam as a byproduct, bringing long-term cost savings and environmental protection benefits to enterprises.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a low-temperature methanol washing tail gas treatment device and its treatment process. Background Technology

[0002] Low-temperature methanol washing is a process used to purify acidic gases (such as carbon dioxide CO2, hydrogen sulfide H2S, etc.), and is widely used in coal chemical and natural gas processing. Existing low-temperature methanol washing units have the following characteristics in their exhaust gas: large volume, high concentration, strong odor, and low oxygen. Currently, most low-temperature methanol washing unit exhaust gas is mixed with other low-concentration emissions from the plant area and then directly discharged into the atmosphere through chimneys, causing air pollution. Furthermore, the direct discharge of low-carbon hydrocarbons with a certain calorific value into the atmosphere also wastes the energy in the exhaust gas. Some units do recover this heat energy, but in the recovery process, sensors and electronically controlled valves are usually used to control the exhaust gas flow. However, these electrical components operate in a high-temperature environment for a long time, making them prone to failure and difficult to troubleshoot.

[0003] For example, the energy-saving low-temperature methanol washing tail gas treatment device disclosed in announcement number CN110594762B can reduce the occupied area and investment cost, but it still requires a considerable amount of operating costs in the long run. Moreover, when recovering heat energy, it relies on a combination of sensors and electronically controlled valves to control the flow of tail gas, which is prone to failure and difficult to troubleshoot. The low-temperature methanol washing tail gas treatment device disclosed in announcement number CN217568120U can effectively recover methanol in the tail gas, but low-carbon hydrocarbons with a certain calorific value are wasted during the treatment process.

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

[0005] To address the shortcomings of existing technologies, this invention provides a low-temperature methanol washing tail gas treatment device and its treatment process, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-temperature methanol wash tail gas treatment device, comprising a treatment box, an inlet pipe connected to the treatment box for conveying the low-temperature methanol wash tail gas to be treated, and a recovery box connected to the treatment box for recovering excess heat energy and producing superheated steam. The treatment box is equipped with:

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

[0008] The return pipe has one end connected to the recovery box for transporting the exhaust gas after heat absorption, and the other end connected to the inlet pipe.

[0009] The outside of the recovery bin is equipped with a guide component for regulating the flow rate of exhaust gas entering the recovery bin, the guide component comprising:

[0010] The power motor, fixed to the bottom of the recycling bin via a motor housing, provides power to the guiding components.

[0011] An expansion plate, which is slidably installed inside the recycling bin, changes the flow rate of exhaust gas entering the recycling bin under the drive of a power motor;

[0012] A sliding plate is slidably inserted inside the expansion plate;

[0013] The deformable ring is fixed inside the recycling bin and works with the sliding plate to improve the sealing of the expansion plate.

[0014] Preferably, the guiding component further includes:

[0015] The output shaft is fixed at one end to the output end of the power motor and is used to transmit the power required for the operation of the guiding components.

[0016] The drive gear is fixed at the other end of the output shaft;

[0017] The transmission gear meshes with the drive gear;

[0018] One end of the drive shaft is fixed to the side wall of the drive gear, and the other end is movably mounted on the recycling bin via a mounting plate to provide support for the drive gear.

[0019] The driven gear meshes with the transmission gear;

[0020] The driven shaft is fixed at one end to the driven gear, providing support for the driven gear.

[0021] Preferably, the guiding component further includes:

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

[0023] The steel strip is fixed at both ends to the winding reel and wound around the winding reel;

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

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

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

[0027] Preferably, the guiding component further includes:

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

[0029] The support plate is fixed at one end inside the recycling bin, and its top is fixed to the other end of the spring to provide support for the spring. One end of the sliding rod slides through the support plate.

[0030] Preferably, the recovery tank is further equipped with a control component for controlling the rate of superheated steam discharge, the control component comprising:

[0031] A water storage tank, fixed inside the recycling tank, is used to hold heated water, and a guide plate for diverting exhaust gas is fixed on the side wall.

[0032] A flow channel, located at the bottom of the water storage tank, guides the flow of high-temperature exhaust gas and increases the heating area;

[0033] Storage box, fixed inside the water storage tank;

[0034] The positioning plate is slidably installed inside the storage box.

[0035] Preferably, the control component further includes:

[0036] The guide rod is fixed at one end inside the storage box and slides out of the positioning plate at the other end, thus restricting the movement direction of the positioning plate.

[0037] Spring 2 has one end fixed inside the storage box and the other end 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 the power for the displacement of the positioning plate.

[0039] The vertical pole is fixed at one end to the positioning plate, and the other end slides out of the recycling bin.

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

[0041] A sliding switch, fixed to the top of the recycling bin, controls the rotation direction of the power motor by toggling a toggle plate, thereby changing the state of the guide assembly.

[0042] Preferably, the recovery tank is further provided with a diffusion assembly for assisting in regulating the superheated steam discharge rate, the diffusion assembly comprising:

[0043] The connecting plate is fixed at one end to the vertical rod;

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

[0045] The guide rod slides through the sliding ring and is fixed at the bottom inside the water tank, restricting the movement direction of the sliding ring;

[0046] The traction rod is hinged at one end to the sliding ring.

[0047] Preferably, the diffusion component further includes:

[0048] The diffuser plate is hinged to the other end of the traction rod;

[0049] The protrusions are fixed on the diffuser plate and work together with the diffuser plate to change the speed at which the water flows throughout the water tank;

[0050] The rotating shaft is fixed to the diffuser plate, providing support for the diffuser plate;

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

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

[0053] S1. The exhaust gas generated by the low-temperature methanol washing unit is transported to the treatment box through the air inlet pipe.

[0054] S2. The exhaust gas in the treatment box is oxidized by regenerative thermal incineration, and the heat generated during the oxidation process is stored in regenerative ceramics.

[0055] S3. The oxidized and heat-stored gas is transported to the 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 processing box is changed by the guiding component, thereby controlling the generation rate of superheated steam.

[0056] S4. A portion of the gas that has undergone heat recovery is transported back to the inlet pipe through the return pipe, and then transported to the processing box again along with the exhaust gas.

[0057] S5. The remaining gas after heat recovery is discharged through the exhaust stack in compliance with 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] This invention provides a low-temperature methanol washing tail gas treatment device and its treatment process. Compared with the prior art, it has the following advantages:

[0060] (1) The low-temperature methanol wash tail gas treatment device and its treatment process involve transporting the tail gas generated by the low-temperature methanol wash to the treatment box through the inlet pipe, and oxidizing the low-temperature methanol wash tail gas by heat storage combustion in the treatment box; part of the heat generated during the oxidation process heats the heat storage ceramic in the treatment box, enabling the treatment box to operate with self-heating, and the other part of the heat enters the recovery box with the purified flue gas, where the recovery box recovers this part of the heat, producing medium and high pressure superheated steam as a byproduct; part of the low-temperature methanol wash tail gas after heat absorption is driven by the recirculation fan. The gas is transported to the inlet pipe through the return gas pipe, and after mixing with the untreated low-temperature methanol wash tail gas, it re-enters the treatment tank. Another portion of the low-temperature methanol wash tail gas is discharged through the discharge pipe after meeting the standards. By controlling the flow rate of the low-temperature methanol wash tail gas entering the recovery tank through the treatment tank, the rate and pressure of the superheated steam output from the recovery tank can be controlled. This prevents production interruptions or quality fluctuations caused by excessively high or low pressure, bringing long-term cost savings and environmental protection benefits to the enterprise. While purifying the low-temperature methanol wash tail gas efficiently and with low energy consumption, it also produces stable medium- and high-pressure superheated steam, enabling the profitable operation of this unit.

[0061] (2) The low-temperature methanol washing tail gas treatment device and its treatment process, in the process of heat recovery using the recovery box, the mechanical structure controls the flow rate of water entering the recovery box and the state of the guiding components according to the temperature inside the recovery box; the high-temperature tail gas entering the recovery box through the treatment box is not adjusted by a combination of sensors and electronic control valves, which reduces the complexity of the electronic control system, has fewer electronic components and wiring, reduces installation difficulty, reduces failure points, and reduces maintenance costs. It is not affected by electromagnetic interference (EMI), and avoids the situation where these electronic components work at high temperature for a long time, and the failure point is not easy to find after a failure occurs somewhere.

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

[0063] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

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

[0065] Figure 2 This is another perspective view of the overall structure of the present invention;

[0066] Figure 3 This is a schematic diagram showing the position of the output shaft of the present invention;

[0067] Figure 4 This is a cross-sectional view of the recycling bin of the present invention;

[0068] Figure 5 This is a structural diagram of the guiding component of the present invention;

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

[0070] Figure 7 This is a cross-sectional view of one of the water storage tanks of the present invention;

[0071] Figure 8 This is a cross-sectional view 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 This is a schematic diagram showing the disassembled 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] In the diagram: 1. Processing box; 11. Inlet pipe; 12. 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. Rewinding reel; 28. Steel belt; 29. ​​Guide block; 210. Fixing 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. Flow channel; 32. Storage box; 33. Positioning plate; 34. Guide rod; 35. Spring II; 36. Deformation plate; 37. Vertical rod; 38. Toggle plate; 39. Slide switch; 4. Connecting plate; 41. Sliding ring; 42. Guide rod; 43. Traction rod; 44. Diffuser plate; 45. Protrusion; 46. Rotating shaft; 47. Fixing rod. Detailed Implementation

[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] Please see Figures 1 to 11 The present invention provides the following technical solutions:

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

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

[0080] One end of the return pipe 12 is connected to the recovery box 13 to transport the exhaust gas after heat absorption, and the other end of the return pipe 12 is connected to the inlet pipe 11.

[0081] The outside of the recycling bin 13 is provided with a guide assembly for regulating the flow of exhaust gas into the recycling bin 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 winding wheel 27, a steel belt 28, a guide block 29, a fixing 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 installed at the bottom of the recycling bin 13 via the motor housing to provide power to the guiding components;

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

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

[0085] The transmission gear 23 and the drive gear 22 are meshed together.

[0086] One end of the drive shaft 24 is fixedly mounted on the side wall of the drive gear 23, and the other end of the drive shaft 24 is movably mounted on the side wall of the mounting plate via a bearing. One end of the mounting plate is fixedly mounted on the outer wall of the recycling box 13. The drive shaft 24 is used to provide support for the drive 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. The driven shaft 26 provides support for the driven gear 25. The side wall of the driven shaft 26 is movably mounted inside the recycling box 13 via bearings.

[0089] The side wall of the take-up reel 27 is fixedly installed at the other end of the driven shaft 26;

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

[0091] The sidewall of the guide block 29 is arc-shaped, and the arc-shaped sidewall of the guide block 29 slides against the sidewall of the steel strip 28;

[0092] The outer wall of the fixing plate 210 is fixedly installed on one end of the guide block 29, and the fixing plate 210 provides support for the guide block 29.

[0093] One end of the sliding rod 211 is fixedly installed on the side wall of the fixed plate 210, and the other end of the sliding rod 211 is fixedly installed 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 spring 212 is fixedly mounted on the side wall of fixing plate 210;

[0095] One end of the support plate 213 is fixedly installed inside the recycling bin 13, and the top of the support plate 213 is fixedly connected to the other end of the spring 212. The support plate 213 provides support for the spring 212, and one end of the sliding rod 211 slides through the support plate 213.

[0096] The outer wall of the expansion plate 214 is slidably installed inside the recycling bin 13, and changes the flow rate of exhaust gas entering the recycling bin 13 under the drive of the power motor 2;

[0097] The sliding plate 215 is slidably inserted into the expansion plate 214;

[0098] One end of the deformable ring 216 is fixedly installed inside the recycling bin 13, and the other end of the deformable ring 216 abuts against the side wall of the expansion plate 214, cooperating with the sliding plate 215 to improve the sealing of the expansion plate 214.

[0099] During use, the exhaust gas generated by the low-temperature methanol washing is transported to the treatment box 1 through the air inlet pipe 11. The low-temperature methanol washing exhaust gas in the treatment box 1 is oxidized by heat storage combustion.

[0100] During the oxidation of the low-temperature methanol washing tail gas, part of the heat generated heats the heat storage ceramic in the treatment box 1, enabling the treatment box 1 to operate on its own. Another part of the heat enters the recovery box 13 with the purified flue gas, and the recovery box 13 is used to recover this part of the heat, producing high-pressure superheated steam as a by-product.

[0101] The low-temperature methanol wash tail gas, after heat absorption by the recovery box 13, is partially transported to the inlet pipe 11 through the return pipe 12 by the recirculation fan. After mixing with the untreated low-temperature methanol wash tail gas, it re-enters the treatment box 1. The other part of the low-temperature methanol wash tail gas is discharged through the discharge pipe in compliance with standards.

[0102] During the process of the low-temperature methanol washing tail gas after regenerative combustion entering the recovery box 13, the power motor 2 is started according to the discharge rate and pressure of the superheated steam. The power motor 2 drives the output shaft 21 to rotate, the output shaft 21 drives the power gear 22 to rotate, the power gear 22 drives the transmission gear 23 to rotate, the transmission shaft 24 provides support force to the transmission gear 23, the transmission gear 23 drives the driven gear 25 to rotate, the driven gear 25 drives the driven shaft 26 to rotate, the driven shaft 26 drives the winding wheel 27 to rotate, and the winding wheel 27 drives the steel belt 28 to move, thereby winding the steel belt 28 onto the winding wheel 27 or releasing it from the winding wheel 27.

[0103] During the winding process of the steel strip 28, the steel strip 28 pushes the guide block 29 to move, applying power to 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. Through the sliding cooperation between the sliding rod 211 and the support plate 213, the support plate 213 guides and limits the sliding rod 211. The recycling box 13 provides support force to the support plate 213. During the movement of the sliding rod 211, the expansion plate 214 is moved synchronously, causing the expansion plate 214 to converge towards the center position with the hinge as the axis. During the convergence of the expansion plate 214, the exposed part of the sliding plate 215 is reduced, which reduces the flow rate of the low-temperature methanol washing tail gas that can enter the recycling box 13 through the expansion plate 214.

[0104] During the release of the steel strip 28, the spring 212 provides a spring force to the fixed plate 210 to the side away from the expansion plate 214, so that the fixed plate 210 can drive the expansion plate 214 to move synchronously through the sliding rod 211, so that the expansion plate 214 unfolds away from the center with the hinge as the axis. During the unfolding of the expansion plate 214, the exposed part of the sliding plate 215 increases, so that the flow rate of the low temperature methanol washing tail gas can enter the recovery box 13 through the expansion plate 214 increases.

[0105] By changing the total amount of low-temperature methanol wash tail gas that can enter the recovery box 13 through the expansion plate 214, the total amount of heat that can be obtained in the recovery box 13 can be controlled, thereby controlling the rate and pressure of the 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 and deformed. After the expansion plate 214 completes the shape change, the deformation ring 216 will return to the preset shape after being heated, thereby pressing against the expansion plate 214 and improving the sealing performance.

[0106] Example 2, the technical solution of which differs from Example 1 is as follows: the recovery box 13 is also provided with a control component for controlling the discharge rate of superheated steam. The control component includes: a water storage tank 3, a flow channel 31, a storage box 32, a positioning plate 33, a guide rod 34, a second spring 35, a deformation 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 installed inside the recycling tank 13 to hold heated water, and a set of guide plates 217 for diverting exhaust gas is fixedly installed on the side wall.

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

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

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

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

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

[0113] One end of the deformable plate 36 abuts against the positioning plate 33. The deformation of the deformable plate 36 under high temperature heating provides power for the displacement of the positioning plate 33. Both the deformable plate 36 and the deformable ring 216 are made of shape memory metal material.

[0114] One end of the vertical rod 37 is fixedly installed on the positioning plate 33, and the other end of the vertical rod 37 slides out of the recycling bin 13.

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

[0116] The bottom of the sliding switch 39 is fixedly installed on the top of the recycling bin 13. The sliding switch 39 controls the rotation direction of the power motor 2 to change the state of the guide component by being toggled by the toggle plate 38.

[0117] During use, in the process of heat recovery using the recovery box 13, the flow rate of water entering the recovery box 13 and the status of the guiding components are controlled according to the temperature inside the recovery box 13.

[0118] Water is supplied to the water storage tank 3 through the inlet pipe. The high-temperature exhaust gas after treatment output from the treatment tank 1 is used to heat the water in the water storage tank 3, thereby generating superheated steam. The superheated steam is then transported to the subsequent treatment process through the discharge pipe.

[0119] After the high-temperature exhaust gas enters the recovery box 13, it is divided into two parts. One part forms an airflow to the upper and lower sides under the guidance of the guide plate 217, thereby heating the water in the water storage tank 3 located at the upper part of the recovery box 13. The other part heats the water in the water storage tank 3 located at the lower part of the recovery box 13.

[0120] These high-temperature gases flow through the flow channel 31 inside the water storage tank 3 to the other side and are discharged through the discharge pipe in compliance with standards. This allows the high-temperature gases to increase their contact area with the water storage tank 3 by utilizing the flow channel 31, while reducing the number of equipment that needs maintenance and enabling the water in the water storage tank 3 to be fully heated.

[0121] At the same time, the heat will be conducted into the storage box 32, heating the storage box 32;

[0122] After the storage box 32 located above the recycling bin 13 is heated, the deformation plate 36 transforms into a pre-programmed memory shape after being heated. The deformation plate 36 causes the positioning plate 33 to move. The positioning plate 33 slides and adapts to the guide rod 34, so that the positioning plate 33 can only move in a straight line along the guide rod 34 during the movement. During the movement of the positioning plate 33, the vertical rod 37 moves synchronously. 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 start of the power motor 2, thereby reducing the diameter of the low-temperature methanol washing tail gas that can pass through.

[0123] The installation positions of the deformable plate 36 and spring 35 in the storage box 32 located below the recycling bin 13 are similar to those of the other two types of springs. Figure 8 The positions shown are reversed;

[0124] After the storage box 32 located below the recycling box 13 is heated, the deformation plate 36 transforms into a pre-programmed memory shape after being heated. The deformation plate 36 causes the positioning plate 33 to move. The positioning plate 33 slides and adapts to the guide rod 34, so that the positioning plate 33 can only move in a straight line along the guide rod 34 during the movement. During the movement of the positioning plate 33, the vertical rod 37 moves synchronously. 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 start of the power motor 2, thereby increasing the diameter through which the low-temperature methanol washing tail gas can pass.

[0125] After the temperature changes, the deformable plate 36 can no longer transform into 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 pressing the deformable plate 36 into its original shape again. Figure 8 The indicated radian.

[0126] Example 3, the technical solution that differs from Example 2 includes: the recovery box 13 is also provided with a diffusion assembly for assisting in adjusting the discharge rate of superheated steam, 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 installed on the vertical rod 37;

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

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

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

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

[0132] The protrusion 45 is fixedly installed on the diffuser plate 44. The protrusion 45 and the diffuser plate 44 cooperate to change the speed at which the water flow spreads throughout the water storage 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] In use, during the process of deformation of the deformable plate 36 driving the state transition of the guide component, the vertical rod 37 synchronously drives the connecting plate 4 to move, and the connecting plate 4 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 in a straight line during the movement. When the sliding ring 41 moves, it drives the traction rod 43 to move, and the traction rod 43 drives the diffuser plate 44 to move.

[0136] The rotating shaft 46 provides support for the diffuser plate 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, so that the diffuser plate 44 can rotate around the rotating shaft 46 as the axis under the drive of the traction rod 43, thereby changing the angle of the diffuser plate 44;

[0137] By installing a diffuser plate 44 directly below the water outlet of the inlet pipe, water impacts the diffuser plate 44 and is broken by the protrusions 45, allowing the water to spread more quickly throughout the water storage tank 3 for waste heat recovery. By changing the opening angle of the diffuser plate 44, the speed at which the water spreads throughout the water storage tank 3 is changed, thereby changing the output rate and pressure of the superheated steam.

[0138] This invention also provides a treatment process suitable for a low-temperature methanol washing tail gas treatment device, including the following steps:

[0139] S1. The exhaust gas generated by the low-temperature methanol washing device is transported to the treatment box 1 through the air inlet pipe 11.

[0140] S2. The exhaust gas in the treatment box 1 is oxidized by regenerative thermal incineration, and the heat generated during the oxidation process is stored in regenerative ceramic.

[0141] S3. The oxidized and heat-stored gas is transported to the recovery box 13 for further heat recovery and superheated steam is produced. During the heat recovery process, the flow rate of the tail gas entering the processing box 1 is changed by the guiding component, thereby controlling the generation rate of superheated steam.

[0142] S4. A portion of the gas that has undergone heat recovery is transported back to the inlet pipe 11 through the return pipe 12, and then transported back to the processing box 1 along with the exhaust gas.

[0143] S5. The remaining gas, after heat recovery, is discharged through the exhaust stack in compliance with emission standards.

[0144] This includes the fact that when the angle of the expansion plate 214 driven by the power motor 2 within the guide assembly changes, the range of change is between 0 and 15°.

[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 wash tail gas treatment device, comprising a treatment tank (1), an inlet pipe (11) connected to the treatment tank (1) for conveying the low-temperature methanol wash tail gas to be treated, and a recovery tank (13) connected to the treatment tank (1) for recovering excess heat energy and producing superheated steam, characterized in that, It also includes: The heat storage ceramic is fixed in the recovery box (13) to absorb the heat released during the oxidation of the exhaust gas; The return pipe (12) is connected at one end to the recovery box (13) for conveying the exhaust gas after heat absorption, and the other end of the return pipe (12) is connected to the inlet pipe (11); The outside of the recovery tank (13) is provided with a guide component for regulating the flow rate of exhaust gas entering the recovery tank (13), the guide component including: The power motor (2) is fixed to the bottom of the recycling bin (13) through the motor box to provide power to the guide assembly; The output shaft (21) is fixed at one end to the output end of the power motor (2) to transmit the power required for the operation of the guide assembly; The power gear (22) is fixed at the other end of the output shaft (21); The transmission gear (23) meshes with the power gear (22); The drive shaft (24) is fixed at one end to the side wall of the drive gear (23), and the other end is movably mounted on the recycling box (13) through the mounting plate to provide support for the drive gear (23); Driven gear (25) meshes with drive gear (23); Driven shaft (26), one end of which is fixed to driven gear (25) to provide support for driven gear (25); The winding reel (27) is fixed to the other end of the driven shaft (26); The steel strip (28) is fixed at both ends to the take-up reel (27) and wound around the take-up reel (27); The guide block (29) abuts against the side wall of the steel strip (28); A fixing plate (210) is fixed to one end of the guide block (29) to provide support for the guide block (29); The sliding rod (211) is fixed at one end to the side wall of the fixed plate (210) and at the other end to the side wall of the expansion plate (214), providing support for the fixed plate (210) and the expansion plate (214); Spring 1 (212) has one end fixed to the side wall of the fixing plate (210); The support plate (213) is fixed at one end inside the recycling bin (13) and at the top to the other end of the spring (212), providing support for the spring (212). One end of the sliding rod (211) slides through the support plate (213). The expansion plate (214) is slidably installed inside the recovery box (13) and changes the flow rate of exhaust gas entering the recovery box (13) under the drive of the power motor (2); The sliding plate (215) is slidably inserted inside the expansion plate (214); The deformable ring (216) is fixed inside the recycling box (13) and works with the sliding plate (215) to improve the sealing of the expansion plate (214).

2. The low-temperature methanol washing tail gas treatment device according to claim 1, characterized in that, The recovery tank (13) is also equipped with a control component for controlling the rate of superheated steam discharge, the control component including: The water storage tank (3) is fixed inside the recycling tank (13) to hold heated water, and a guide plate (217) for diverting exhaust gas is fixed on the side wall. A flow channel (31) is located at the bottom of the water storage tank (3) to guide the flow of high-temperature exhaust gas and increase the heating area; Storage box (32) is fixed inside water storage tank (3); The positioning plate (33) is slidably installed inside the storage box (32).

3. The low-temperature methanol washing tail gas treatment device according to claim 2, characterized in that, The control component also includes: The guide rod (34) is fixed at one end inside the storage box (32) and slides out from the positioning plate (33) at the other end, thus restricting the movement direction of the positioning plate (33). Spring 2 (35) has one end fixed inside the storage box (32) and the other end fixed on the positioning plate (33), providing elastic force for the positioning plate (33) to reset; The deformable plate (36) abuts against the positioning plate (33), and its deformation under high temperature heating provides power for the displacement of the positioning plate (33); The vertical rod (37) is fixed at one end to the positioning plate (33) and the other end slides out of the recycling bin (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 recycling bin (13). When the toggle plate (38) is turned, it controls the rotation direction of the power motor (2) to change the state of the guide component.

4. The low-temperature methanol washing tail gas treatment device according to claim 3, characterized in that, The recovery tank (13) is also equipped with a diffusion assembly for assisting in regulating the superheated steam discharge rate. The diffusion assembly includes: One end of the connecting plate (4) is fixed to the vertical rod (37); The sliding ring (41) is fixed to the other end of the connecting plate (4); The guide rod (42) slides through the sliding ring (41) and its bottom is fixed inside the water storage tank (3), which restricts the movement direction of the sliding ring (41); The traction rod (43) is hinged at one end to the sliding ring (41).

5. The low-temperature methanol washing tail gas treatment device according to claim 4, characterized in that, The diffusion component further includes: The diffuser plate (44) is hinged to the other end of the traction rod (43); The protrusion (45) is fixed on the diffuser plate (44) and works with the diffuser plate (44) to change the speed at which the water flows throughout the water tank (3); The 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 is fixed on the guide rod (42) to provide support for the rotating shaft (46).

6. The treatment process applicable to the low-temperature methanol washing tail gas treatment device according to any one of claims 1-5, characterized in that, Includes the following steps: S1. The exhaust gas generated by the low-temperature methanol washing device is transported to the treatment box (1) through the air inlet pipe (11); S2. The exhaust gas in the treatment box (1) is oxidized by regenerative thermal incineration, and the heat generated during the oxidation process is stored in regenerative ceramics. S3. The oxidized and heat-stored gas is transported to the recovery box (13) for further heat recovery and superheated steam is produced. During the heat recovery process, the flow rate of the tail gas entering the processing box (1) is changed by the guiding component, thereby controlling the generation rate of superheated steam. S4. A portion of the gas that has undergone heat recovery is transported back to the inlet pipe (11) through the return pipe (12), and then transported to the processing box (1) again with the exhaust gas. S5. The remaining gas after heat recovery is discharged through the exhaust stack in compliance with standards.

7. The treatment process of a low-temperature methanol washing tail gas treatment device according to claim 6, characterized in that: The angle variation range of the drive expansion plate (214) in the guide assembly is between 0-15°.

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