A purification treatment device for producing ethanol from coke oven gas

Abstract

The invention relates to the technical field of methane purification, and discloses a purification treatment device for preparing ethanol from coke oven gas, comprising a purification tank, wherein a support ring is rotatably installed inside the purification tank, a purification cylinder is axially arranged in the inner ring of the support ring, and the two sides of the purification cylinder in the axial direction are respectively an adsorption chamber and a desorption chamber; the purification cylinder is composed of an outer adsorption cylinder, at least one group of intermediate adsorption cylinders and an inner adsorption cylinder; the purification treatment device for preparing ethanol from coke oven gas, by arranging an adsorption chamber and a desorption chamber in the purification tank, and designing a purification cylinder composed of an outer adsorption cylinder, an intermediate adsorption cylinder and an inner adsorption cylinder, utilizing the axial deformation of the purification cylinder, so that an adsorption layer 1 in the purification cylinder can be adjusted to the adsorption chamber or the desorption chamber, when the adsorption layer 1 is located in the adsorption chamber, it is used for adsorption purification of methane, and when the adsorption layer 1 needs to be desorbed, the adsorption layer 1 can be adjusted to the desorption chamber.

Description

Technical Field

[0001] The invention relates to the technical field of methane purification, in particular to a purification treatment device for producing ethanol from coke oven gas. Background Art

[0002] Ethanol is a high-quality clean energy source. Ethanol can be used alone or mixed with gasoline. Ethanol production methods include fermentation, hydrolysis, carbonyl synthesis, etc. Among them, the carbonyl synthesis method using synthesis gas has good development prospects. In addition to methane, the main components of coke oven gas are hydrogen, carbon monoxide and carbon dioxide. Among them, hydrogen, carbon monoxide and carbon dioxide are the synthesis gas required for the synthesis of ethanol. Therefore, coke oven gas can be used to obtain the raw gas for the preparation of ethanol.

[0003] When coke oven gas is used to obtain raw gas for the synthesis of ethanol, a small amount of methane will be contained in the synthesis gas. Methane does not participate in the reaction during the synthesis of ethanol, but after the synthesis of ethanol, the methane will be directly discharged with the reaction gas or enter the circulating gas to enter the next round of ethanol synthesis. The direct emission of methane into the atmosphere will increase the greenhouse effect. If it enters the circulating gas, the methane content in the ethanol reactor will continue to increase, which will reduce the effective partial pressure of carbon monoxide and carbon dioxide with hydrogen, which is not conducive to the synthesis reaction of ethanol. Therefore, after the synthesis of ethanol, the methane in the reaction gas needs to be purified.

[0004] Zeolite is usually used as an adsorption material to adsorb and purify methane. After a period of time, the adsorption and purification effect of the zeolite material in the traditional methane purification equipment will decrease, and the zeolite material needs to be desorbed. Therefore, the zeolite material in the purification equipment needs to be removed. The desorption process of the zeolite material in the purification equipment is relatively cumbersome and will affect the continuous purification of methane. Summary of the invention

[0005] In order to solve the problem that the above conventional methane purification equipment needs to disassemble the zeolite material for desorption treatment, the desorption treatment of the zeolite material is relatively cumbersome, and at the same time it will affect the continuous purification operation of methane, the present invention is implemented through the following technical scheme: a purification treatment device for making ethanol from coke oven gas, comprising a purification tank, a support ring is rotatably installed inside the purification tank, a purification cylinder is axially arranged in the inner ring of the support ring, and the two sides of the purification cylinder in the axial direction are respectively an adsorption chamber and a desorption chamber;

[0006] The purification cylinder is composed of an outer adsorption cylinder, at least one group of intermediate adsorption cylinders and an inner adsorption cylinder, the outer adsorption cylinder is axially slidably arranged in the inner ring of the support ring, the diameters of the intermediate adsorption cylinder and the inner adsorption cylinder are successively reduced, and are axially slidably connected in sequence;

[0007] The outer annular surfaces of the outer adsorption tube, the middle adsorption tube and the inner adsorption tube are all adsorption layer one. The positions of the adsorption layer one of the outer adsorption tube, the middle adsorption tube and the inner adsorption tube are adjusted by axial sliding. When the adsorption layer one is located in the adsorption chamber, the adsorption layer one is used to adsorb and purify methane in the reaction gas. When the adsorption layer one is located in the desorption chamber, the adsorption layer one is desorbed.

[0008] Furthermore, the cross section of the support ring is T-shaped, the outer adsorption cylinder is axially slidably installed in the inner ring of the support ring through a support slide bar, and both ends of the support slide bar are provided with limiting side edges;

[0009] The inner annular surfaces of the outer adsorption cylinder and the middle adsorption cylinder are axially provided with a limiting slide groove 1 and a limiting slide groove 2, one end of the limiting slide groove 1 extends to one side of the outer adsorption cylinder or the middle adsorption cylinder, and one end of the limiting slide groove 2 extends to the other side of the adsorption cylinder or the middle adsorption cylinder;

[0010] The outer ring surfaces of the middle adsorption cylinder and the inner adsorption cylinder are fixedly mounted with a slider 1 and a slider 2, wherein the slider 1 is matched with the corresponding limiting slide groove 1, and the slider 2 is matched with the corresponding limiting slide groove 2.

[0011] Furthermore, an air inlet pipe is provided on the surface of the purification tank corresponding to the adsorption chamber, an air outlet pipe is rotatably installed in the inner cylinder of the inner adsorption cylinder, a telescopic pipe is provided in the middle section of the air outlet pipe, and one end of the air outlet pipe away from the inner adsorption cylinder passes through the desorption chamber and extends to the outside of the purification tank;

[0012] The surfaces of the purification tank corresponding to the desorption chamber are provided with an input pipe and an output pipe;

[0013] An exhaust pipe is arranged at one end of the air inlet pipe and the input pipe located inside the purification tank. The exhaust pipe is arranged obliquely in a direction close to the purification cylinder. A plurality of nozzles are arranged on the surface of the exhaust pipe close to the purification cylinder.

[0014] Furthermore, a threaded ring is fixedly installed in the inner cylinder of the inner adsorption cylinder, a transmission shaft is rotatably installed inside the purification tank, a threaded rod is provided in the middle section of the transmission shaft, and the threaded ring is adapted to the threaded rod.

[0015] Furthermore, the outer adsorption tube, the middle adsorption tube and the inner adsorption tube are composed of an adsorption layer 1, a heat insulation layer and an adsorption layer 2 in sequence from the outside to the inside.

[0016] Furthermore, a multi-stage telescopic rod is provided on the surface of the transmission shaft located in the inner section of the adsorption chamber, the innermost rod body of the multi-stage telescopic rod is fixedly connected to the transmission shaft, and the outermost rod body of the multi-stage telescopic rod is rotatably connected to the threaded ring;

[0017] A plurality of centrifugal impellers are fixedly arranged on the outermost rod body surface of the multi-stage telescopic rod, and the sizes of the plurality of centrifugal impellers increase in sequence in a direction away from the inner adsorption cylinder.

[0018] Furthermore, a magnetic ring is fixedly provided on the surface of the transmission shaft located in the inner section of the desorption chamber, a non-threaded section is provided between the magnetic ring and the threaded rod, and a side of the threaded ring close to the magnetic ring is made of magnetic material.

[0019] Furthermore, it also includes: a heat exchanger, a reactor, a water cooler, an ethanol separator and a distillation tower;

[0020] The synthesis gas obtained by using the anxious coal gas is compressed and then enters the heat exchanger for preheating, and then enters the reactor to react and synthesize ethanol. The gas phase after the reaction is discharged from the reactor and then enters the heat exchanger and the water cooler in sequence. The obtained liquid ethanol enters the ethanol separator. The reaction gas separated from the liquid ethanol after cooling and the reaction gas discharged from the ethanol separator enter the purification tank. The crude ethanol separated by the ethanol separator enters the distillation tower;

[0021] Part of the gas purified by the purification tank is discharged, and the other part is pressurized as circulating gas and enters the next cycle with the raw gas.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The purification treatment device for producing ethanol from coke oven gas is provided with an adsorption chamber and a desorption chamber in a purification tank, and a purification tube consisting of an outer adsorption tube, an intermediate adsorption tube and an inner adsorption tube is designed. The adsorption layer 1 in the purification tube can be adjusted to the adsorption chamber or the desorption chamber by utilizing the axial deformation of the purification tube. When the adsorption layer 1 is located in the adsorption chamber, it is used for adsorption and purification of methane. When the adsorption layer 1 needs to be desorbed, the adsorption layer 1 can be adjusted to the desorption chamber. The purification tube in the purification tank can realize desorption without disassembly.

[0024] 2. The purification treatment device for producing ethanol from coke oven gas is composed of an adsorption layer 1, a heat insulation layer and an adsorption layer 2 to form an outer adsorption tube, a middle adsorption tube and an inner adsorption tube. When the position of the purification tube is adjusted by axial movement, the positions of the adsorption layer 1 and the adsorption layer 2 will be adjusted synchronously, so that the adsorption layer 1 and the adsorption layer 2 appear alternately in the adsorption chamber. When the adsorption layer 2 is desorbed, the adsorption layer 1 can be used to adsorb and purify the methane in the adsorption chamber. When the adsorption layer 1 is desorbed, the adsorption layer 2 can be used to adsorb and purify the methane in the adsorption chamber, thereby realizing continuous adsorption and purification of methane. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a flow chart of ethanol synthesis of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the purification tank of the present invention;

[0027] Figure 3 This is a structural stereogram of the purification tank of the present invention;

[0028] Figure 4 The internal structure of the purification tank of the present invention is distributed in three dimensions Figure 1 ;

[0029] Figure 5 The purification cartridge structure of the present invention is three-dimensional Figure 1 ;

[0030] Figure 6 The purification cartridge structure of the present invention is three-dimensional Figure 2 ;

[0031] Figure 7 The internal structure of the purification tank of the present invention is distributed in three dimensions Figure 2 ;

[0032] Figure 8 A three-dimensional diagram of the centrifugal impeller distribution structure on the surface of the multi-stage telescopic rod of the present invention;

[0033] Fig. 9 It is a three-dimensional diagram of the structural distribution of the adsorption cylinder and the multi-stage telescopic rod on the surface of the transmission shaft of the present invention;

[0034] Fig.10 This is a three-dimensional diagram of the structure of the outer adsorption tube of the present invention;

[0035] Fig.11 It is a three-dimensional diagram of the inner layer distribution structure of the adsorption tube of the present invention.

[0036] In the figure: 1. purification tank; 101. adsorption chamber; 102. desorption chamber; 2. support ring; 201. gear ring; 3. outer adsorption cylinder; 31. limit side edge; 32. support slide; 4. middle adsorption cylinder; 5. inner adsorption cylinder; 51. threaded ring; 6. limit slide groove 1; 61. limit slide groove 2; 7. slide block 1; 71. slide block 2; 8. adsorption layer 1; 81. insulation layer; 82. adsorption layer 2; 9. transmission shaft; 91. threaded rod; 92. magnetic ring; 10. air inlet pipe; 11. air outlet pipe; 111. outlet pipe; 12. input pipe; 13. output pipe; 14. exhaust pipe; 15. multi-stage telescopic rod; 16. centrifugal impeller; 17. heat exchanger; 18. reactor; 19. water cooler; 20. ethanol separator; 21. distillation tower. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0038] The embodiment of the purification treatment device for producing ethanol from coke oven gas is as follows:

[0039] See also Figure 1-Figure 11 A purification device for preparing ethanol from coke oven gas comprises a purification tank 1, a support ring 2 is rotatably installed inside the purification tank 1, a purification cylinder is axially arranged in the inner ring of the support ring 2, and the two sides of the purification cylinder in the axial direction are respectively an adsorption chamber 101 and a desorption chamber 102. The methane in the reaction gas after preparing ethanol is adsorbed and purified by the purification cylinder in the adsorption chamber 101, and the purification cylinder is desorbed in the desorption chamber 102 to restore the adsorption and purification capacity of the purification cylinder.

[0040] The purification cylinder is composed of an outer adsorption cylinder 3, at least one group of intermediate adsorption cylinders 4 and an inner adsorption cylinder 5. The outer adsorption cylinder 3 is axially slidably arranged in the inner ring of the support ring 2. The diameters of the intermediate adsorption cylinder 4 and the inner adsorption cylinder 5 are reduced in sequence and are axially slidably connected in sequence. When the outer adsorption cylinder 3, the intermediate adsorption cylinder 4 and the inner adsorption cylinder are axially expanded, the purification cylinder composed of them is conical, and the adjacent adsorption cylinders inside the purification cylinder and the outer adsorption cylinder and the support ring 2 are all connected in a sliding and sealing manner.

[0041] The cross-section of the support ring 2 is T-shaped. The outer adsorption cylinder 3 is axially slidably installed in the inner ring of the support ring 2 through a support slide bar 32. Both ends of the support slide bar 32 are provided with limiting side edges 31. The limiting side edges 31 on both sides of the outer adsorption cylinder 3 cooperate with the support ring 2 to limit the range of axial movement of the outer adsorption cylinder 3.

[0042] The inner annular surfaces of the outer adsorption cylinder 3 and the middle adsorption cylinder 4 are axially provided with a limiting groove 1 6 and a limiting groove 2 61, one end of the limiting groove 1 6 extends to one side of the outer adsorption cylinder 3 or the middle adsorption cylinder 4, and one end of the limiting groove 2 61 extends to the other side of the adsorption cylinder 3 or the middle adsorption cylinder 4.

[0043] The outer ring surfaces of the middle adsorption cylinder 4 and the inner adsorption cylinder 5 are fixedly mounted with a slider 1 7 and a slider 2 71 . The slider 1 7 is matched with the corresponding limiting slide groove 1 6 , and the slider 2 71 is matched with the corresponding limiting slide groove 2 61 .

[0044] The limiting slide groove 1 6 cooperates with the slider 1 7 and the limiting slide groove 2 61 cooperates with the slider 2 71 to limit the range of axial movement of the middle adsorption cylinder 4 and the inner adsorption cylinder 5, so as to facilitate the axial expansion of the purification cylinder into a cone. When the purification cylinder moves axially, the slider 2 71 on the outer ring surface of the corresponding adsorption cylinder will cooperate with the corresponding limiting slide groove 2 61 before the slider 1 7 is separated from the limiting slide groove 2 61. Similarly, before the slider 2 71 is separated from the limiting slide groove 2 61, the slider 1 7 on the outer ring surface of the corresponding adsorption cylinder will cooperate with the corresponding limiting slide groove 1 6, so as to ensure the stable axial movement of the adsorption cylinder.

[0045] A gear ring 201 is fixedly installed on the outer ring surface of the support ring 2, and a motor is installed on the outer surface of the purification tank 1. The output end of the motor is provided with a gear meshing with the gear ring 201. The motor is used to drive the support ring 2 to rotate. When the support ring 2 rotates, it will drive the purification cylinder on its inner ring to rotate together.

[0046] The outer annular surfaces of the outer adsorption tube 3, the middle adsorption tube 4 and the inner adsorption tube 5 are all adsorption layers 8, and the adsorption layer 8 is made of zeolite material. The adsorption layer 8 is used to adsorb and purify methane. The positions of the adsorption layers 8 of the outer adsorption tube 3, the middle adsorption tube 4 and the inner adsorption tube 5 are adjusted by axial sliding. Figure 4 At this time, the adsorption layer 8 on the outside of the purification cylinder is located in the adsorption chamber 101, refer to Figure 7 At this time, the adsorption layer 8 on the outside of the purification cylinder is located in the desorption chamber 102. When the adsorption layer 8 is located in the adsorption chamber 101, the adsorption layer 8 is used to adsorb and purify the methane in the reaction gas. When the adsorption layer 8 is located in the desorption chamber 102, the adsorption layer 8 is heated, and the high temperature is used to desorb the substances adsorbed by the adsorption layer 8.

[0047] The outer adsorption tube 3, the middle adsorption tube 4 and the inner adsorption tube 5 are composed of an adsorption layer 1 8, an insulating layer 81 and an adsorption layer 2 82 from the outside to the inside. The adsorption layer 2 82 is a zeolite material. When the adsorption layer 1 8 on the outer surface of the purification tube is desorbed in the desorption chamber 102, the adsorption layer 2 82 is arranged on the inner side of the adsorption tube of the purification tube. At this time, the adsorption layer 2 82 is located in the adsorption chamber 101, and the adsorption layer 2 82 can be used to continue to adsorb and purify the methane in the reaction gas.

[0048] A threaded ring 51 is fixedly installed in the inner cylinder of the inner adsorption cylinder 5, a transmission shaft 9 is rotatably installed inside the purification tank 1, a motor device for driving the transmission shaft 9 to rotate is arranged on the outer side of the purification tank 1, a threaded rod 91 is arranged in the middle section of the transmission shaft 9, and the threaded ring 51 is matched with the threaded rod 91. When the transmission shaft 9 is driven to rotate by the motor device, the threaded rod 91 is engaged with the threaded ring 51 to drive the inner adsorption cylinder 5 to move axially. The inner adsorption cylinder 5 drives the middle adsorption cylinder 4 and the outer adsorption cylinder 3 to move axially through the cooperation of the slider 1 7 and the limiting slide groove 1 6 or the cooperation of the slider 2 71 and the limiting slide groove 2 61, so as to adjust the position of the adsorption layer 1 8 on the surface of the purification cylinder.

[0049] A multi-stage telescopic rod 15 is provided on the surface of the transmission shaft 9 located in the inner section of the adsorption chamber 101. The multi-stage telescopic rod 15 is composed of a plurality of cylindrical rod bodies which are sequentially sleeved. The innermost rod body of the multi-stage telescopic rod 15 is fixedly connected to the transmission shaft 9, and the outermost rod body of the multi-stage telescopic rod 15 is rotatably connected to the threaded ring 51. The multi-stage telescopic rod 15 can rotate synchronously with the threaded rod 91.

[0050] A plurality of centrifugal impellers 16 are fixedly arranged on the outermost rod surface of the multi-stage telescopic rod 15. The sizes of the plurality of centrifugal impellers 16 increase in sequence in the direction away from the inner adsorption cylinder 5. When the threaded rod 91 rotates, the centrifugal impellers 16 are driven to rotate together. When the threaded rod 91 cooperates with the threaded ring 51 to drive the inner adsorption cylinder 5 to move toward the desorption chamber 102, the inner adsorption chamber 5 is moved to the desorption chamber 102. Figure 7 As shown, the centrifugal impeller 16 enters the interior of the purification cylinder. As the threaded rod 91 continues to rotate, the centrifugal impeller 16 assists in pushing the reaction gas into the second adsorption layer 82, and the second adsorption layer 82 is used to adsorb and purify the reaction gas in the adsorption chamber 101.

[0051] A magnetic ring 92 is fixedly provided on the surface of the transmission shaft 9 located in the inner section of the desorption chamber 102. There is a non-threaded section between the magnetic ring 92 and the threaded rod 91. The side of the threaded ring 51 close to the magnetic ring 92 is made of magnetic material. When the threaded ring 51 moves to the non-threaded section, the rotation of the transmission shaft 9 no longer drives the threaded ring 51 to move axially. At this time, the continued rotation of the transmission shaft 9 will drive the centrifugal impeller 16 to rotate. There is a repulsive force between the magnetic ring 92 and the threaded ring 51 when they are close to each other. When it is necessary to adjust the adsorption layer 8 to the inside of the adsorption chamber 101, the transmission shaft 9 is driven to rotate in the reverse direction. Under the action of the magnetic ring 92, the threaded ring 51 will be threadedly engaged with the threaded rod 91.

[0052] When there is no need to rotate the transmission shaft 9 to adjust the position of the inner adsorption cylinder 5, the motor is used to drive the support ring 2 to rotate, and the support ring 2 drives the purification cylinder to rotate together, and the purification cylinder drives the threaded rod 91 to rotate together. The motor equipment outside the purification tank 1 has no braking and locking effect on the transmission shaft 9.

[0053] An air inlet pipe 10 is provided on the surface corresponding to the purification tank 1 and the adsorption chamber 101. The reaction gas after preparing ethanol is introduced into the adsorption chamber 101 through the air inlet pipe 10. An air outlet pipe 11 is rotatably installed in the inner cylinder of the inner adsorption cylinder 5 to prevent the air outlet pipe 11 from rotating with the inner adsorption cylinder 5. The gas after adsorption and purification is discharged through the air outlet pipe 11. A telescopic pipe is provided in the middle section of the air outlet pipe 11 to ensure the axial movable connection between the air outlet pipe 11 and the inner adsorption cylinder 5. One end of the air outlet pipe 11 away from the inner adsorption cylinder 5 passes through the desorption chamber 102 and extends to the outside of the purification tank 1. The air outlet pipe 11 is externally connected to a desorption pipe 111, and the desorption pipe 111 is used to transport the gas after adsorption and purification to the next step.

[0054] An input pipe 12 and an output pipe 13 are provided on the surface of the purification tank 1 corresponding to the desorption chamber 102. When the purification cylinder is subjected to desorption treatment, high-temperature gas is input into the desorption chamber 102 by means of the input pipe 12, and the purification cylinder is subjected to desorption treatment by means of high temperature. After desorption is completed, low-temperature cooling gas is input into the desorption chamber 102 by means of the input pipe 12, so as to cool the purification cylinder.

[0055] An exhaust pipe 14 is provided at one end of the air inlet pipe 10 and the input pipe 12 located inside the purification tank 1. The exhaust pipe 14 is inclined in the direction close to the purification cylinder. A plurality of nozzles are provided on the surface of the exhaust pipe 14 close to the purification cylinder. The exhaust pipe 14 is provided to facilitate spraying the reaction gas or high-temperature gas to be treated onto the surface of the purification cylinder.

[0056] When the adsorption layer 1 8 is located in the adsorption chamber 101, the adsorption layer 2 82 is located in the desorption chamber 102. At this time, the high-temperature gas is injected into the desorption chamber 102 by using the input pipe 12. At this time, the output pipe 13 is in a closed state under the action of the control valve. After the high-temperature gas fills the desorption chamber 102, the adsorption layer 2 82 is desorbed by using high temperature. After desorption, the control valve is used to open the output pipe 13, and the gas in the desorption chamber 102 is extracted by using the output pipe 13.

[0057] The equipment for producing ethanol from coke oven gas also includes: a heat exchanger 17, a reactor 18, a water cooler 19, an ethanol separator 20 and a distillation tower 21; the synthesis gas obtained by using the coke oven gas is compressed and then enters the heat exchanger 17 for preheating, and then enters the reactor 18 to react and synthesize ethanol, the gas phase after the reaction is discharged from the reactor 18 and then enters the heat exchanger 17 and the water cooler 19 in sequence, the obtained liquid ethanol enters the ethanol separator 20, the reaction gas separated from the liquid ethanol after cooling and the reaction gas discharged from the ethanol separator 20 enter the purification tank 1, and the crude ethanol separated by the ethanol separator 20 enters the distillation tower 21; part of the gas purified by the purification tank 1 is discharged, and the other part is used as circulating gas and pressurized to enter the next cycle with the raw gas.

[0058] The synthesis gas obtained from the coal gas is a raw gas including carbon monoxide, carbon dioxide and hydrogen. After the raw gas is purified, the content of hydrogen, carbon monoxide and carbon dioxide is in a suitable ratio, and then the synthesis gas is compressed to 2MPa and enters the desulfurization process. The compressed gas temperature is about 40°C, and then enters the heat exchanger 17 to be heated to 250-300°C, and then enters the reactor 18 to synthesize ethanol under the action of the catalyst.

[0059] The gas phase out of the reactor 18 enters the heat exchanger 17 again to preheat the reaction gas entering the heat exchanger 17, and then enters the water cooler 19 to cool to about 40°C, at which time most of the ethanol and water vapor are separated from the reaction gas. The crude ethanol coming out of the ethanol separator 20 is depressurized to 0.5MPa and then enters the flash tank to release most of the gas dissolved in the crude ethanol. The crude ethanol coming out of the flash tank enters the distillation tower 21.

[0060] Working principle of the purification device for producing ethanol from coke oven gas:

[0061] After ethanol is produced by using the reactor 18, the reaction gas separated from the ethanol enters the adsorption chamber 101 through the air inlet pipe 10. At this time, the purification cartridge 101 is Figure 4 In the state shown, the motor on the outside of the purification tank 1 is started at the same time, the motor drives the gear at its output end to rotate, the gear is engaged with the gear ring 201 to drive the support ring 2 to rotate, the support ring 2 drives the purification cylinder to rotate, and the reaction gas entering the exhaust pipe 14 through the intake pipe 10 is ejected from the nozzle, and is continuously sprayed on the surface of the adsorption layer 8 of the outer adsorption cylinder 3, the middle adsorption cylinder 4 and the inner adsorption cylinder 5 as the purification cylinder rotates, and the zeolite material of the adsorption layer 8 adsorbs and purifies the methane in the reaction gas.

[0062] After the purification cylinder in the adsorption chamber 101 has been adsorbing and purifying the reaction gas entering therein for a set time, the motor device outside the purification tank 1 is started, and the motor device drives the transmission shaft 9 to rotate. The transmission shaft 9 drives the inner adsorption cylinder 5 to move toward the desorption chamber 102 through the meshing of the threaded rod 91 and the threaded ring 51, until the threaded ring 51 moves to the non-threaded section between the magnetic ring 92 and the threaded rod 91. At this time, the inner adsorption cylinder 5 no longer moves. The state of the purification cylinder at this time is as follows: Figure 7 shown.

[0063] exist Figure 7In the state shown, the purification cylinder continues to be driven to rotate, and high-temperature gas is input into the desorption chamber 102 through the input pipe 12. The high-temperature gas is sprayed into the adsorption layer 8 of the purification cylinder, and the adsorption layer 8 is desorbed by high temperature to restore the adsorption purification capacity of the adsorption layer 8. At the same time, the desorbed gas in the desorption chamber 102 is extracted by the output pipe 13. After the desorption of the purification cylinder is completed, the low-temperature gas is injected into the desorption chamber 102 by the input pipe 12 to cool the adsorption layer 8.

[0064] When the desorption chamber 102 is desorbing the adsorption layer 1 8 of the purification cylinder, the adsorption layer 2 82 is located in the adsorption chamber 101. At this time, the motor equipment is used to continue to drive the transmission shaft 9 to rotate. The transmission shaft 9 drives the centrifugal impeller 16 to rotate through the multi-stage telescopic rod 15. As the centrifugal impeller 16 rotates, the reaction gas in the adsorption chamber 101 continuously contacts the adsorption layer 2 82. At this time, the adsorption layer 2 82 is used to continue to adsorb and purify the reaction gas entering the adsorption chamber 101. The gas after adsorption and purification is output from the purification tank 1 through the outlet pipe 11 and the outlet pipe 111.

[0065] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A purification treatment device for producing ethanol from coke oven gas, comprising a purification tank (1), characterized in that: A support ring (2) is rotatably mounted inside the purification tank (1), a purification cylinder is axially arranged in the inner ring of the support ring (2), and the two sides of the purification cylinder in the axial direction are an adsorption chamber (101) and a desorption chamber (102) respectively; The purification cylinder is composed of an outer adsorption cylinder (3), at least one group of intermediate adsorption cylinders (4) and an inner adsorption cylinder (5); the outer adsorption cylinder (3) is axially slidably arranged in the inner ring of the support ring (2); the diameters of the intermediate adsorption cylinder (4) and the inner adsorption cylinder (5) are successively reduced and are axially slidably connected in sequence; The outer annular surfaces of the outer adsorption tube (3), the middle adsorption tube (4) and the inner adsorption tube (5) are all adsorption layers (8); the positions of the adsorption layers (8) of the outer adsorption tube (3), the middle adsorption tube (4) and the inner adsorption tube (5) are adjusted by axial sliding; when the adsorption layer (8) is located in the adsorption chamber (101), the adsorption layer (8) is used to adsorb and purify methane in the reaction gas; when the adsorption layer (8) is located in the desorption chamber (102), the adsorption layer (8) is desorbed; The cross section of the support ring (2) is T-shaped, and the outer adsorption cylinder (3) is axially slidably installed in the inner ring of the support ring (2) via a support slide bar (32), and both ends of the support slide bar (32) are provided with limiting side edges (31); The inner annular surfaces of the outer adsorption cylinder (3) and the middle adsorption cylinder (4) are both axially provided with a limiting slide groove 1 (6) and a limiting slide groove 2 (61), one end of the limiting slide groove 1 (6) extends to one side surface of the outer adsorption cylinder (3) or the middle adsorption cylinder (4), and one end of the limiting slide groove 2 (61) extends to the other side surface of the adsorption cylinder (3) or the middle adsorption cylinder (4); The outer annular surfaces of the intermediate adsorption cylinder (4) and the inner adsorption cylinder (5) are both fixedly mounted with a slider 1 (7) and a slider 2 (71); the slider 1 (7) is matched with the corresponding limiting slide groove 1 (6), and the slider 2 (71) is matched with the corresponding limiting slide groove 2 (61).

2. The purification device for producing ethanol from coke oven gas according to claim 1, characterized in that: An air inlet pipe (10) is provided on a surface of the purification tank (1) corresponding to the adsorption chamber (101); an air outlet pipe (11) is rotatably mounted in the inner cylinder of the inner adsorption cylinder (5); a telescopic pipe is provided in the middle section of the air outlet pipe (11); an end of the air outlet pipe (11) away from the inner adsorption cylinder (5) passes through the desorption chamber (102) and extends to the outside of the purification tank (1); An input pipe (12) and an output pipe (13) are provided on the surface of the purification tank (1) corresponding to the desorption chamber (102); An exhaust pipe (14) is provided at one end of the air inlet pipe (10) and the input pipe (12) located inside the purification tank (1). The exhaust pipe (14) is arranged obliquely in a direction close to the purification cylinder. A plurality of nozzles are provided on the surface of the exhaust pipe (14) close to the purification cylinder.

3. The purification device for producing ethanol from coke oven gas according to claim 2, characterized in that: A threaded ring (51) is fixedly mounted in the inner cylinder of the inner adsorption cylinder (5), a transmission shaft (9) is rotatably mounted inside the purification tank (1), a threaded rod (91) is provided in the middle section of the transmission shaft (9), and the threaded ring (51) is adapted to fit the threaded rod (91).

4. The purification device for producing ethanol from coke oven gas according to claim 3, characterized in that: The outer adsorption tube (3), the middle adsorption tube (4) and the inner adsorption tube (5) are composed of an adsorption layer 1 (8), a heat insulation layer (81) and an adsorption layer 2 (82) in sequence from the outside to the inside.

5. The purification device for producing ethanol from coke oven gas according to claim 4, characterized in that: A multi-stage telescopic rod (15) is provided on the surface of the transmission shaft (9) located in the inner section of the adsorption chamber (101), the innermost rod body of the multi-stage telescopic rod (15) is fixedly connected to the transmission shaft (9), and the outermost rod body of the multi-stage telescopic rod (15) is rotatably connected to the threaded ring (51); A plurality of centrifugal impellers (16) are fixedly disposed on the outermost rod body surface of the multi-stage telescopic rod (15), and the sizes of the plurality of centrifugal impellers (16) increase sequentially in a direction away from the inner adsorption cylinder (5).

6. The purification device for producing ethanol from coke oven gas according to claim 5, characterized in that: A magnetic ring (92) is fixedly arranged on the surface of the transmission shaft (9) located in the inner section of the desorption chamber (102); a non-threaded section is provided between the magnetic ring (92) and the threaded rod (91); and a side of the threaded ring (51) close to the magnetic ring (92) is made of magnetic material.

7. The purification device for producing ethanol from coke oven gas according to any one of claims 1 to 6, characterized in that: It also includes: a heat exchanger (17), a reactor (18), a water cooler (19), an ethanol separator (20) and a distillation tower (21); The synthesis gas obtained by using the coal gas is compressed and then enters the heat exchanger (17) for preheating, and then enters the reactor (18) to react and synthesize ethanol. The gas phase after the reaction is discharged from the reactor (18) and then enters the heat exchanger (17) and the water cooler (19) in sequence. The obtained liquid ethanol enters the ethanol separator (20). The reaction gas separated from the liquid ethanol after cooling and the reaction gas discharged from the ethanol separator (20) enter the purification tank (1), and the crude ethanol separated by the ethanol separator (20) enters the distillation tower (21); Part of the gas purified by the purification tank (1) is discharged, and the other part is pressurized as circulating gas and enters the next cycle with the raw gas.

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