Device for recovering carbon dioxide in waste gas

Abstract

The invention relates to the technical field of carbon dioxide recovery, in particular to a device for recovering carbon dioxide in waste gas. Comprising a shell, a carbon dioxide collection chamber, a carbon dioxide decomposition chamber, a moving mechanism, a plugging group and a stirring structure, refrigeration elements are arranged in the two folding air bags, the folding air bags are refrigerated through the refrigeration elements, waste gas entering the two folding air bags and small water drops of ammonia water in carbon dioxide are condensed, and when the carbon dioxide decomposition chamber is compressed, high-concentration ammonia water in the carbon dioxide decomposition chamber flows into the carbon dioxide collection chamber, so that high-concentration ammonia water in the carbon dioxide decomposition chamber is collected. The high-concentration ammonia water is mixed with the low-concentration ammonia water, so that the concentration of the ammonia water in the carbon dioxide collecting chamber is kept once, and the capture efficiency of carbon dioxide is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide recovery, and in particular to a device for recovering carbon dioxide from waste gas. Background Art

[0002] Waste gas is injected into the bottom of the ammonia pool, and ammonia absorbs carbon dioxide in the waste gas, and then discharges the waste gas. After a period of collection, the carbon dioxide is released. The ammonia is heated to 59 degrees Celsius, and the ammonia releases carbon dioxide. Whether collecting or releasing carbon dioxide, a certain temperature is required, which causes the ammonia to evaporate and form small ammonia droplets. Many small ammonia droplets will flow with the rising waste gas and carbon dioxide and be discharged from the absorption tower due to their small size, thereby causing ammonia to leak out and consume ammonia. Moreover, as too much carbon dioxide is captured, the ammonia concentration in the ammonia pool varies, so the absorption rate of carbon dioxide becomes lower. Therefore, there is an urgent need for a carbon dioxide recovery tank to solve the above problems. Summary of the invention

[0003] Therefore, the present invention is made in view of the above problems. The purpose of the present invention is a device for recovering carbon dioxide from waste gas. First, the small droplets of ammonia water flowing with the waste gas and carbon dioxide are collected by condensation and returned to the ammonia water pool; second, the ammonia water pool is stirred by shaking and high-concentration ammonia water is added to the ammonia water pool, thereby increasing the absorption rate of ammonia water. The present invention achieves the above purpose through the following technical solutions: A device for recovering carbon dioxide from waste gas, comprising: a housing, a carbon dioxide collection chamber, a carbon dioxide decomposition chamber, a moving mechanism, a blocking group, and a stirring structure; A vertical partition is arranged in the shell; a moving mechanism, a blocking group, and a stirring structure are arranged on both sides of the vertical partition; and horizontal partitions are arranged on both sides of the vertical partition; The moving mechanism includes: a first shell, a second shell, a folding airbag, and a push plate; the two push plates and the horizontal partition respectively form a carbon dioxide collection chamber and a carbon dioxide decomposition chamber, the air intake pipe is connected to the carbon dioxide collection chamber, and the infusion pipe is connected to the carbon dioxide decomposition chamber; the first shell and the second shell are coaxially fixed on the vertical partition and the push plate, respectively, and a folding airbag is arranged between the first shell and the second shell; a protrusion is arranged at the upper end of the first shell, and the two ends of the air intake pipe are respectively connected to the horizontal partition and the protrusion, an exhaust pipe is arranged on the top surface of the second shell, and a reflux pipe is arranged at the lower end of the second shell, and the other end of the reflux pipe is connected to the push plate , and a one-way valve is arranged on the return pipe; the two folding airbags are provided with transmission pipes, the two ends of the transmission pipes are respectively fixed to the two second shells, and the two ends of the transmission pipes are respectively provided with refrigeration elements, and an electric telescopic rod is arranged in one of the folding airbags, and the electric telescopic rod is connected to the transmission pipe; the lower ends of the two push plates are provided with a first connecting pipe and a second connecting pipe; valves are respectively arranged on the wall surfaces of the two push plates, and the two valves respectively block the first connecting pipe and the second connecting pipe, and when the liquid level in the carbon dioxide collection chamber and the carbon dioxide decomposition chamber rises, the two valves respectively open the first connecting pipe or the second connecting pipe; The blocking group includes: a blocking plate 1, a blocking plate 2, a limiting plate, and a spring; a transmission plate is provided at one end of the blocking plate 1, a limiting groove is provided on the bottom surface of the blocking plate 1, the exhaust pipe is located in the limiting groove, and the other end of the blocking plate 1 passes through the push plate; the blocking plate 2 is slidably connected to the blocking plate 1, one end of the blocking plate 2 is bent and extends into the raised portion along the socket, the limiting plate and the blocking plate 1 are staggered, wherein the opposite ends of the limiting plate and the blocking plate 1 are rounded, and the opposite ends of the limiting plate and the blocking plate 1 are respectively provided with a bump and a groove; the spring is obliquely connected to the blocking plate 1; the two stirring structures stir the carbon dioxide collection chamber and the carbon dioxide decomposition chamber.

[0004] Preferably, a floating block 1 is slidably arranged inside the second shell, above the connection point between the return pipe and the second shell.

[0005] Preferably, the valve includes: a slide rail, a second float, a baffle, and a rope; the second float and the second float 472 are arranged on the slide rail, the second float is located above the baffle, and they are connected by a rope.

[0006] Preferably, the stirring structure includes: blades, a mounting plate, and a screw; the number of the blades is multiple, and the multiple blades are fixed on the mounting plate, the mounting plate is connected to the push plate through a bearing, a nut is provided on the mounting plate, the nut is meshed with the screw, and the screw has a large number of turns.

[0007] Beneficial effects of the present invention: 1. The two folding airbags of the present invention are provided with refrigeration elements, which cool the inside of the folding airbags and condense the small ammonia water droplets in the exhaust gas and carbon dioxide entering the two folding airbags, so that the ammonia water gathers in the two folding airbags and finally refluxes through the reflux pipe; when the exhaust gas and carbon dioxide enter the two folding airbags, only air is taken in and no exhaust is discharged, so there is sufficient time to condense the small ammonia water droplets in the exhaust gas and carbon dioxide.

[0008] 2. In the present invention, when compressing the carbon dioxide decomposition chamber, high-concentration ammonia water in the carbon dioxide decomposition chamber flows into the carbon dioxide collecting chamber, and the high-concentration ammonia water mixes with the low-concentration ammonia water, so that the ammonia water concentration in the carbon dioxide collecting chamber is maintained once, thereby improving the capture efficiency of carbon dioxide; when compressing the carbon dioxide collecting chamber, low-concentration ammonia water and ammonium bicarbonate enter the carbon dioxide decomposition chamber, and the carbon dioxide decomposition chamber decomposes the ammonium bicarbonate into ammonia water and carbon dioxide, so that the capture and collection of carbon dioxide can be carried out continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0010] Figure 2 It is a schematic diagram of the local structure of the present invention.

[0011] Figure 3 It is a schematic diagram of the structure of the mobile mechanism of the present invention.

[0012] Figure 4 It is a top view of the plugging group of the present invention.

[0013] Figure 5 It is a schematic diagram of the structure of the plugging group of the present invention.

[0014] Figure 6 It is a schematic diagram of the push plate structure of the present invention.

[0015] Figure 7 It is a schematic diagram of the movement of the blocking group of the present invention.

[0016] Figure 8 It is a schematic diagram of the airbag contraction in the moving mechanism of the present invention. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that it is easy for those with ordinary skills in the prior art to implement these embodiments. However, the present invention can also be implemented in various different forms. Therefore, the present invention is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, parts that are not connected with the invention will be omitted from the accompanying drawings.

[0018] like Figure 1As shown, a device for recovering carbon dioxide from exhaust gas comprises: a housing 1, a carbon dioxide collection chamber 2, a carbon dioxide decomposition chamber 3, a moving mechanism 4, a blocking group 5, and a stirring structure 6; A vertical partition 11 is provided in the shell 1, and the inside of the shell 1 is divided into two spaces by the vertical partition 11. The upper ends of the two spaces are respectively provided with an exhaust gas exhaust pipe 15 and a carbon dioxide exhaust pipe 16; the two spaces have the same structure, and the two spaces are respectively provided with a moving mechanism 4, a blocking group 5, and a stirring structure 6; horizontal partitions 12 are respectively provided in the spaces on both sides, and the ends of the two horizontal partitions 12 are spaced a certain distance from the wall of the vertical partition 11; like Figure 2-3As shown, the moving mechanism 4 includes: a first shell 41, a second shell 42, a folding airbag 43, and a push plate 44; the wall surfaces of the push plate 44 are provided with a rubber layer, the push plate 44 and the horizontal partition 12 form a 90-degree angle, the top surface of the push plate 44 is in contact with the top surface of the horizontal partition 12, and the push plate 44 and the horizontal partition 12 form a carbon dioxide collection chamber 2 and a carbon dioxide decomposition chamber 3 through the two spaces of the push plate 44 and the horizontal partition 12, respectively, the carbon dioxide collection chamber 2 is injected with low-concentration ammonia water, and the carbon dioxide decomposition chamber 3 is injected with high-concentration ammonia water, the intake pipe 13 is connected to the carbon dioxide collection chamber 2, and the intake pipe 13 is connected to the carbon dioxide collection chamber 2. The collecting chamber 2 transports the exhaust gas to collect the carbon dioxide in the exhaust gas, and the infusion pipe 14 is connected to the carbon dioxide decomposition chamber 3. The infusion pipe 14 replenishes the carbon dioxide decomposition chamber 3 with high-concentration ammonia water to decompose the carbon dioxide in the high-concentration ammonia water; the first shell 41 and the second shell 42 are coaxially fixed on the vertical partition 11 and the push plate 44 respectively, and a folding airbag 43 is arranged between the first shell 41 and the second shell 42. When the folding airbag 43 in the space on one side is in an unfolded state, the folding airbag 43 in the space on the other side is in a folded state; a protrusion 411 is arranged on the upper end of the first shell 41, and a side of the protrusion 411 is arranged There is a socket, one end of the intake pipe 412 is connected to the horizontal partition 12, and the other end is connected to the top surface of the raised portion 411, the top surface of the second shell 42 is provided with an exhaust pipe 421, and the lower end of the second shell 42 is provided with a return pipe 422, the other end of the return pipe 422 is connected to the push plate 44, and a one-way valve is provided on the return pipe 422. The interior of the second shell 42 is located above the connection between the return pipe 422 and the second shell 42, and a floating block 423 is slidably provided. When there is no ammonia water, the floating block 423 blocks the return pipe 422. The return pipe 422, the exhaust pipe 421, and the intake pipe 412 are The diameter is small; the two folding airbags 43 are provided with a transmission tube 48, and the two ends of the transmission tube 48 are respectively fixed to the two second shells 42, and the two ends of the transmission tube 48 are respectively provided with a refrigeration element 49, and a condensation space is formed in the folding airbag 43 through the refrigeration element 49; one of the folding airbags 43 is provided with an electric telescopic rod 40, and the electric telescopic rod 40 is connected to the transmission tube 48, and the transmission tube 48 is slowly driven by the electric telescopic rod 40, so as to control the extension and contraction of the two folding airbags 43; the lower ends of the two push plates 44 are provided with a first connecting tube 45 and a second connecting tube 46; like Figure 6As shown, valves 47 are respectively arranged on the wall surfaces of the two push plates 44, and the two valves 47 respectively block the first connecting pipe 45 and the second connecting pipe 46, and the valve 47 comprises: a slide rail 471, a second floating block 472, a baffle 473, and a rope 474; the second floating block 472 and the second floating block 472 are arranged on the slide rail 471, and the second floating block 472 is located above the baffle 473, and they are connected by a rope 474, and the initial baffle 473 blocks the first connecting pipe 45; like Figure 4-5 As shown, the blocking group 5 includes: a blocking plate 1 51, a blocking plate 2 52, a limiting plate 53, and a spring 54; a transmission plate 511 is provided at one end of the blocking plate 1 51, and a limiting groove 513 is provided on the bottom surface of the blocking plate 1 51. The exhaust pipe 421 is located in the limiting groove 513, and the blocking plate 1 51 blocks the exhaust pipe 421. The other end of the blocking plate 1 51 passes through the push plate 44; the blocking plate 2 52 is slidably connected to the blocking plate 1 51, and the sealing One end of the second blocking plate 52 is bent and extends along the socket into the raised portion 411, and one end of the second blocking plate 52 is slidably connected to the inside of the raised portion 411; the limiting plate 53 is fixed below the horizontal partition 12, and the limiting plate 53 is staggered with the first blocking plate 51, wherein the opposite ends of the limiting plate 53 and the first blocking plate 51 are rounded, and the opposite ends of the limiting plate 53 and the first blocking plate 51 are respectively provided with a protrusion 531 and a groove 512; the spring 54 is obliquely connected to the first blocking plate 51; The stirring structure 6 includes: blades 61, a mounting plate 62, and a screw 63; the number of the blades 61 is multiple, and the multiple blades 61 are fixed on the mounting plate 62. The mounting plate 62 is connected to the push plate 44 through a bearing. A nut 621 is provided on the mounting plate 62, and the nut 621 is engaged with the screw 63. The screw 63 has a large number of turns. When the push plate 44 moves slowly, the multiple blades 61 are allowed to rotate quickly through the nut 621 and the screw 63, thereby stirring the carbon dioxide collection chamber 2 and the carbon dioxide decomposition chamber 3.

[0019] Working principle of the present invention: Action is performed in the space on one side, and the exhaust gas enters the carbon dioxide collecting chamber 2 along the intake pipe 13, and the low-concentration ammonia water captures carbon dioxide, thereby forming ammonium bicarbonate with the low-concentration ammonia water. The filtered exhaust gas enters the folded airbag 43 along the intake pipe 412, and the small water droplets of ammonia water in the exhaust gas are condensed in the folded airbag 43. The ammonia water gathers to make the floating block 423 rise, and at the same time the folded airbag 43 expands, and the exhaust pipe 421 pushes the blocking plate 51 to move, and the blocking plate 51 continues to block the exhaust pipe 421, and the push plate 44 compresses the space of the carbon dioxide collecting chamber 2, so that the liquid level of the low-concentration ammonia water rises. The rising liquid level makes the floating block 472 rise and pulls the baffle 473, and the first connecting pipe 45 opens. Since the carbon dioxide collecting chamber 2 is compressed and the diameter of the intake pipe 412 is small, the pressure in the carbon dioxide collecting chamber 2 is greater than that in the carbon dioxide decomposition chamber 3, and the low-concentration ammonia water and ammonium bicarbonate enter the carbon dioxide decomposition chamber 3. The liquid level of the low-concentration ammonia water drops and the baffle 473 blocks the first connecting pipe 45 again. Figure 7 As shown, when the folding airbag 43 is about to be deployed, the blocking plate 1 51 is opposite to the end of the limit plate 53, and the blocking plate 1 51 is tilted. At this time, the exhaust pipe 421 is opened, the protrusion 531 is engaged with the groove 512, and the bent end of the blocking plate 2 52 blocks the intake pipe 412. The electric telescopic rod 40 is pulled back to compress the folding airbag 43, and the exhaust gas and ammonia water are discharged from the folding airbag 43. The folded airbag 43 is in the unfolded state, the exhaust pipe 421 is opened, and the intake pipe 412 is blocked. Figure 8 As shown, the folded airbag 43 is slowly compressed. Due to the small diameters of the exhaust pipe 421 and the return pipe 422, the internal pressure of the folded airbag 43 is strong, and the carbon dioxide is discharged along the exhaust pipe 421, and the ammonia water flows back into the carbon dioxide decomposition chamber 3 along the return pipe 422. The role of the floating block 423 is to prevent the carbon dioxide from flowing into the carbon dioxide decomposition chamber 3 again along the return pipe 422 after the ammonia water reflux ends. That is, the floating block 423 blocks the return pipe 422 after the ammonia water flow ends. When the folded airbag 43 is about to complete the compression, the exhaust pipe 421 pushes the transmission plate 511, and the concave The groove 512 is separated from the protrusion 531, and the spring 54 pulls the sealing plate 1 51 and the sealing plate 2 52 to reset, the exhaust pipe 421 is blocked, the intake pipe 412 is opened, and the carbon dioxide enters the folding airbag 43 again; at this time, the folding airbag 43 slowly unfolds, allowing the liquid level of the high-concentration ammonia water to rise, and the rising liquid level causes the floating block 2 472 to rise and pull the baffle 473, the second connecting pipe 46 is opened, and the high-concentration ammonia water enters the carbon dioxide collection chamber 3, and the ammonia water concentration in the carbon dioxide collection chamber 2 is maintained by the stirring of the blade 61, thereby improving the capture efficiency of carbon dioxide.

Claims

1. A device for recovering carbon dioxide from waste gas, comprising: A housing (1), a carbon dioxide collection chamber (2), a carbon dioxide decomposition chamber (3), a moving mechanism (4), a blocking group (5), and a stirring structure (6); characterized in that: a vertical partition (11) is arranged inside the housing (1); the moving mechanism (4), the blocking group (5), and the stirring structure (6) are arranged on both sides of the vertical partition (11); horizontal partitions (12) are arranged on both sides of the vertical partition (11); the moving mechanism (4) comprises: a first housing (41), a second housing (42), a folding airbag (43), and a push plate (44); the two push plates (44 ) and the horizontal partition (12) respectively form a carbon dioxide collection chamber (2) and a carbon dioxide decomposition chamber (3); the air intake pipe (13) is connected to the carbon dioxide collection chamber (2), and the liquid infusion pipe (14) is connected to the carbon dioxide decomposition chamber (3); the first shell (41) and the second shell (42) are coaxially fixed on the vertical partition (11) and the push plate (44), respectively, and a folding airbag (43) is arranged between the first shell (41) and the second shell (42); a protrusion (411) is arranged on the upper end of the first shell (41), and both ends of the air intake pipe (412) are connected to the horizontal partition (12); The second shell (42) is provided with an exhaust pipe (421) on the top surface, and a return pipe (422) is provided at the lower end of the second shell (42). The other end of the return pipe (422) is connected to the push plate (44), and a one-way valve is provided on the return pipe (422); the two folding airbags (43) are provided with a transmission pipe (48), and the two ends of the transmission pipe (48) are respectively fixed to the two second shells (42). The two ends of the transmission pipe (48) are respectively provided with a refrigeration element (49), and one of the folding airbags (43) is provided with a transmission pipe (48). 3) an electric telescopic rod (40) is arranged inside, and the electric telescopic rod (40) is connected to the transmission tube (48); a first connecting tube (45) and a second connecting tube (46) are arranged at the lower ends of the two push plates (44); valves (47) are respectively arranged on the wall surfaces of the two push plates (44), and the two valves (47) respectively block the first connecting tube (45) and the second connecting tube (46); when the liquid level in the carbon dioxide collection chamber (2) and the carbon dioxide decomposition chamber (3) rises, the two valves (47) respectively open the first connecting tube (45) or the second connecting tube (46); The blocking group (5) comprises: a blocking plate 1 (51), a blocking plate 2 (52), a limiting plate (53), and a spring (54); a transmission plate (511) is provided at one end of the blocking plate 1 (51); a limiting groove (513) is provided on the bottom surface of the blocking plate 1 (51); the exhaust pipe (421) is located in the limiting groove (513); the other end of the blocking plate 1 (51) passes through the push plate (44); the blocking plate 2 (52) and the blocking plate 1 (53) are connected to each other. The blocking plate 1 (51) is slidably connected, one end of the blocking plate 2 (52) is bent and extends along the socket into the raised portion (411), the limiting plate (53) and the blocking plate 1 (51) are staggered, wherein the opposite ends of the limiting plate (53) and the blocking plate 1 (51) are rounded, and the opposite ends of the limiting plate (53) and the blocking plate 1 (51) are respectively provided with a protrusion (531) and a groove (512); the spring (54) is obliquely connected to the blocking plate 1 (51).

2. The device for recovering carbon dioxide from waste gas according to claim 1, characterized in that: A floating block 1 (423) is slidably arranged inside the second shell (42), above the connection point between the return pipe (422) and the second shell (42).

3. The device for recovering carbon dioxide from waste gas according to claim 1, characterized in that: The valve (47) comprises: a slide rail (471), a second floating block (472), a baffle (473), and a rope (474); the second floating block (472) and the second floating block (472) are arranged on the slide rail (471), the second floating block (472) is located above the baffle (473), and the two are connected by a rope (474).

4. The device for recovering carbon dioxide from waste gas according to claim 1, characterized in that: The stirring structure (6) comprises: blades (61), a mounting plate (62), and a screw (63); the number of the blades (61) is plural, the plural blades (61) are fixed on the mounting plate (62), the mounting plate (62) is connected to the push plate (44) via a bearing, a nut (621) is provided on the mounting plate (62), the nut (621) is meshed with the screw (63), and the screw (63) has a large number of turns.

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