Cement kiln flue gas carbon dioxide capturing device

Abstract

A cement kiln flue gas carbon dioxide capture device comprises a pretreatment box, a capture box and a transfer box. The pretreatment box is hollow and comprises an air inlet pipe, a first propelling part and a filtering part; the capturing box is arranged at the bottom of the pretreatment box and comprises a reagent box and a gas transfer pipe; the transfer box is arranged at the top of the capturing box, is positioned beside the pretreatment box and comprises a second propelling part and an exhaust pipe; an adsorption reagent is contained in the reagent box; and one end of the gas transfer pipe is also provided with a gas outlet one-way valve. The cement kiln flue gas treatment device solves the problems that in an existing cement kiln flue gas treatment device, a filter is inconvenient to disassemble, and treated carbon dioxide is inconvenient to reuse.

Description

Technical Field

[0001] The utility model relates to the field of cement kiln flue gas treatment, in particular to a cement kiln flue gas carbon dioxide capture device. Background Art

[0002] During cement production, limestone (mainly calcium carbonate) decomposes at high temperatures to produce calcium oxide and carbon dioxide. The carbon dioxide produced in this process is the main source of greenhouse gas emissions in the cement industry. As global climate change becomes increasingly serious, reducing carbon dioxide emissions in the cement industry has become an urgent need for industry development.

[0003] Because cement kiln flue gas contains a lot of solid impurities, when processing the carbon dioxide in it, it is necessary to filter the solid impurities in the flue gas first. However, most of the existing carbon dioxide capture and purification treatment systems have fixed structures, which makes it difficult to disassemble the filter plates. In addition, the carbon dioxide cannot be reused after treatment, wasting a lot of resources. Utility Model Content

[0004] The utility model aims to provide a device for capturing carbon dioxide from flue gas of a cement kiln, which solves the problem that it is inconvenient to disassemble a filtering device and it is inconvenient to reuse carbon dioxide.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A cement kiln flue gas carbon dioxide capture device, comprising:

[0007] A pretreatment box, wherein the pretreatment box is hollow inside and comprises an air inlet pipe, a first propulsion part and a filter part; the air inlet pipe is arranged at the lower side of the outer side wall of the pretreatment box and is connected with the inside thereof; the first propulsion part is arranged at the top side of the pretreatment box to push the gas downward; the filter part is arranged at the bottom side of the pretreatment box;

[0008] A capture box, the capture box is arranged at the bottom of the pretreatment box, and includes a reagent box and a gas transfer tube; the reagent box is arranged inside the capture box; one end of the gas transfer tube is arranged at the top of the reagent box, below the filter part, and the other end is arranged inside the reagent box and close to the bottom;

[0009] A transfer box, which is arranged on the top of the capture box and beside the pretreatment box, and comprises a second propulsion unit and an exhaust pipe; the second propulsion unit is arranged on one side inside the transfer box and is used to push the gas to the other side; the exhaust pipe is arranged on one side outside the transfer box;

[0010] Furthermore, the reagent box is filled with an adsorption reagent; and the other end of the gas transfer tube is also provided with a gas outlet one-way valve.

[0011] The first propulsion unit includes a first telescopic rod motor, a first telescopic rod and a first propulsion block; the first telescopic rod motor is arranged on the top side of the pretreatment box; the upper fixed end of the first telescopic rod is connected to the bottom of the first telescopic rod motor; the first propulsion block is connected to the lower movable end of the first telescopic rod;

[0012] Furthermore, the first propulsion block is in airtight contact with the inner wall of the pretreatment box.

[0013] The filter part includes a filter plate placement slot, a filter plate and a movable door; the filter plate placement slot is horizontally arranged at the bottom side of the pretreatment box; the filter plate is slidably arranged in the filter plate placement slot; the movable door is arranged on the side wall of the pretreatment box, next to the filter plate placement slot;

[0014] Furthermore, a sealing ring is provided at the connection between the movable door and the side wall of the pretreatment box.

[0015] The tube wall at the top end of the gas transfer tube is connected around the filter plate placement groove, so that the gas passing through the filter plate can enter the gas transfer tube.

[0016] The capture box is also provided with a liquid inlet pipe, a gas through hole and a liquid discharge port; the liquid inlet pipe is arranged on the upper side of the outer wall of the capture box, passes through the capture box and the reagent box, and is connected to the inside of the reagent box; the gas through hole is arranged at the contact point between the top of the capture box and the transfer box, and is connected to the inside of the reagent box and the transfer box; the liquid discharge port is arranged at the bottom of the capture box, and is connected to the inside of the reagent box;

[0017] Furthermore, a sealing cover is provided at one end of the liquid inlet pipe; and a sealing cover is also provided at the liquid discharge port.

[0018] The second propulsion unit includes a second telescopic rod motor, a second telescopic rod and a second propulsion block; the second telescopic rod motor is arranged at one side of the transfer box; the fixed end of the second telescopic rod is connected to the second telescopic rod motor; the second propulsion block is connected to the movable end of the second telescopic rod;

[0019] Furthermore, the second propulsion block is in airtight contact with the inner wall of the transfer box.

[0020] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0021] The utility model discloses a cement kiln flue gas carbon dioxide capture device. First, the adsorbent is poured into the reagent box along the liquid inlet pipe, and then one end of the liquid inlet pipe is sealed with a sealing cover. Then, the flue gas to be treated is input from the air inlet pipe, and enters the pretreatment box through the air inlet check valve. Then, under the action of the first propulsion unit, the flue gas passes through the filter unit downward to filter the solid impurities therein. Then, the flue gas moves along the gas transfer pipe and is discharged from the gas outlet check valve at one end thereof, and is discharged from the gas through hole at the top of the reagent box to the transfer box. Then, under the action of the second propulsion unit, the filtered flue gas is discharged through the exhaust pipe, and then the sealing cover of the liquid discharge port is opened to discharge the adsorbent in the reagent box, so as to facilitate the subsequent separation and reuse of carbon dioxide. Then, the movable door on one side of the pretreatment box is opened, and the filter plate therein is drawn out and replaced along the filter plate placement slot. The filter plate in the utility model is slidably arranged at the bottom of the pretreatment box, so as to facilitate disassembly and replacement. The adsorbent is used for the treatment of carbon dioxide, so that it can be separated later for reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The internal structure of the utility model is shown in FIG. Figure 1 ;

[0023] Figure 2 The internal structure of the utility model is shown in FIG. Figure 2 ;

[0024] Figure 3 Yes Figure 1 Schematic diagram of the structure of the filter plate.

[0025] In the figure, 1-pretreatment box, 101-air inlet pipe, 102-air inlet check valve, 103-first telescopic rod motor, 104-first telescopic rod, 105-first propulsion block, 106-filter plate placement slot, 107-filter plate, 1071-plate frame, 1072-filter screen, 1073-handle slot, 108-movable door, 2-transfer box, 201-gas through hole, 202-second telescopic rod motor, 203-second telescopic rod, 204-second propulsion block, 205-exhaust pipe, 3-capture box, 301-reagent box, 302-gas transfer pipe, 303-gas outlet check valve, 304-adsorption reagent, 305-liquid discharge port, 306-liquid inlet pipe. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0028] like Figure 1 As shown, a device for capturing carbon dioxide from flue gas of a cement kiln comprises a pretreatment box 1, a capture box 3, and a transfer box 2; the capture box 3 is arranged at the bottom of the pretreatment box 1; the transfer box 2 is arranged at the top of the capture box 3, and is located beside the pretreatment box 1; the pretreatment box 1 is hollow inside, and an air inlet pipe 101 is arranged at the lower side of its outer wall; a first propulsion unit and a filtering unit are arranged inside the pretreatment box 1; the first propulsion unit is arranged at the top side of the pretreatment box 1; the filtering unit is arranged at the bottom side of the pretreatment box 1; the capture box 3 is hollow inside, and a reagent box 301 is arranged inside. and a gas transfer pipe 302; a liquid discharge port 305 is provided at the outer bottom of the capture box 3, which connects the inside of the reagent box 301 with the outside, and a sealing cover is also provided at the liquid discharge port 305; a gas through hole 201 is provided at the contact point between the top of the capture box 3 and the transfer box 2, which connects the reagent box 301 with the inside of the transfer box 2; a liquid inlet pipe 306 is provided on the side wall of the capture box 3, which is obliquely connected to the inside of the reagent box 301, and a sealing cover is also provided at the upper end of the liquid inlet pipe 306; the interior of the transfer box 2 is hollow, and a second propulsion unit is provided inside, and an exhaust pipe 205 is also provided on its outer wall;

[0029] Specifically, the reagent box 301 contains an adsorption reagent 304, and the adsorption reagent 304 is a phase-change absorbent. The phase-change absorbent is a prior art and is not an improvement of this embodiment, so it will not be described in detail here.

[0030] like Figure 1 As shown, the first propulsion unit includes a first telescopic rod motor 103, a first telescopic rod 104 and a first propulsion block 105; the first telescopic rod motor 103 is arranged on the top side of the pretreatment box 1; the upper fixed end of the first telescopic rod 104 is connected to the bottom of the first telescopic rod motor 103, and the first telescopic rod motor 103 is used to drive the first telescopic rod 104 to work; the first propulsion block 105 is connected to the lower movable end of the first telescopic rod 104, and the first propulsion block 105 is in airtight contact with the inner wall of the pretreatment box 1;

[0031] like Figure 1 and 3 As shown, the filter unit includes a filter plate placement slot 106, a filter plate 107 and a movable door 108; the filter plate placement slot 106 is two U-shaped slots, which are horizontally arranged on the two inner side walls of the pretreatment box 1; the movable door 108 is rotatably arranged on the side wall of the pretreatment box 1, and is located beside the filter plate placement slot 106; the filter plate 107 passes through the movable door 108 and is slidably arranged in the filter plate placement slot 106;

[0032] Specifically, a sealing ring is provided at the connection between the movable door 108 and the side wall of the pretreatment box 1; a handle is also provided on the outside of the movable door 108;

[0033] More specifically, the filter plate 107 includes a plate frame 1071 and a filter screen 1072 ; the plate frame 1071 is disposed around the filter screen 1072 to fix the filter screen 1072 ; a handle groove 1073 is also disposed on one side edge of the plate frame 1071 .

[0034] like Figure 1 As shown, the tube wall at the top of the gas transfer tube 302 surrounds and is connected to the bottom of the filter plate placement groove 106, so that the gas passing through the filter plate 107 can enter the gas transfer tube 302; the lower end of the gas transfer tube 302 is close to the bottom of the reagent box 301, and is provided with a gas outlet check valve 303 to prevent the adsorption reagent 304 inside the reagent box 301 from flowing back into the gas transfer tube 302;

[0035] like Figure 1 As shown, the second propulsion unit includes a second telescopic rod motor 202, a second telescopic rod 203 and a second propulsion block 204; the second telescopic rod motor 202 is arranged on a side of the transfer box 2 away from the exhaust pipe 205; the fixed end of the second telescopic rod 203 is connected to the second telescopic rod motor 202, and the second telescopic rod motor 202 is used to drive the second telescopic rod 203 to work; the second propulsion block 204 is connected to the movable end of the second telescopic rod 203, and the second propulsion block 204 is in airtight contact with the inner wall of the transfer box 2

[0036] The working principle of this embodiment is:

[0037] The utility model discloses a cement kiln flue gas carbon dioxide capture device. First, the adsorption reagent 304 phase change absorbent is poured into the reagent box 301 along the liquid inlet pipe 306 and filled. Then, the upper end of the liquid inlet pipe 306 is sealed with a sealing cover. Then, the flue gas to be treated is input from the air inlet pipe 101, and enters the pretreatment box 1 through the air inlet check valve 102. Then, the first telescopic rod motor 103 drives the first telescopic rod 104 to extend, driving the first propulsion block 105 to move downward, so that the flue gas passes through the filter plate 107 downward to filter the solid impurities therein. Then, the flue gas moves along the gas transfer pipe 302 and is discharged from the lower end thereof. The gas is discharged from the gas outlet check valve 303 and discharged from the gas through hole 201 at the top of the reagent box 301 to the transfer box 2. Then the second telescopic rod motor 202 drives the second telescopic rod 203 to extend, driving the second propulsion block 204 to move to the right, and the filtered flue gas is discharged through the exhaust pipe 205. Then the sealing cover of the liquid discharge port 305 is opened to discharge the phase change absorbent absorbing carbon dioxide in the reagent box 301, so as to facilitate the subsequent separation and reuse of carbon dioxide. Then the movable door 108 on one side of the pretreatment box 1 is opened, and the filter plate 107 is pulled out and replaced along the filter plate placement groove 106. The filter plate 107 in the utility model is slidably set at the bottom of the pretreatment box 1, which is convenient for disassembly and replacement. The adsorption reagent 304 is used for the treatment of carbon dioxide, so that it can be separated later for reuse.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for capturing carbon dioxide from cement kiln flue gas, characterized in that: include: A pretreatment box, wherein the pretreatment box is hollow inside and comprises an air inlet pipe, a first propulsion part and a filter part; the air inlet pipe is arranged at the lower side of the outer side wall of the pretreatment box and is connected with the inside thereof; the first propulsion part is arranged at the top side of the pretreatment box to push the gas downward; the filter part is arranged at the bottom side of the pretreatment box; A capture box, which is arranged at the bottom of the pretreatment box and includes a reagent box and a gas transfer pipe; The reagent box is arranged inside the capture box; one end of the gas transfer tube is arranged at the top of the reagent box and is located below the filter part, and the other end is arranged inside the reagent box and close to the bottom; A transfer box, which is arranged on the top of the capture box and beside the pretreatment box, and comprises a second propulsion unit and an exhaust pipe; the second propulsion unit is arranged on one side inside the transfer box and is used to push the gas to the other side; the exhaust pipe is arranged on one side outside the transfer box; Furthermore, the reagent box is filled with an adsorption reagent; and the other end of the gas transfer tube is also provided with a gas outlet one-way valve.

2. A cement kiln flue gas carbon dioxide capture device according to claim 1, characterized in that: The first propulsion unit includes a first telescopic rod motor, a first telescopic rod and a first propulsion block; the first telescopic rod motor is arranged on the top side of the pretreatment box; the upper fixed end of the first telescopic rod is connected to the bottom of the first telescopic rod motor; The first propulsion block is connected to the lower movable end of the first telescopic rod; Furthermore, the first propulsion block is in airtight contact with the inner wall of the pretreatment box.

3. The device for capturing carbon dioxide from cement kiln flue gas according to claim 1, characterized in that: The filter part includes a filter plate placement slot, a filter plate and a movable door; the filter plate placement slot is horizontally arranged at the bottom side of the pretreatment box; the filter plate is slidably arranged in the filter plate placement slot; the movable door is arranged on the side wall of the pretreatment box, next to the filter plate placement slot; Furthermore, a sealing ring is provided at the connection between the movable door and the side wall of the pretreatment box.

4. The device for capturing carbon dioxide from cement kiln flue gas according to claim 1, characterized in that: The tube wall at the top end of the gas transfer tube is connected around the filter plate placement groove, so that the gas passing through the filter plate can enter the gas transfer tube.

5. The device for capturing carbon dioxide from cement kiln flue gas according to claim 1, characterized in that: The capture box is also provided with a liquid inlet pipe, a gas through hole and a liquid discharge port; the liquid inlet pipe is arranged on the upper side of the outer wall of the capture box, passes through the capture box and the reagent box, and is connected to the inside of the reagent box; the gas through hole is arranged at the contact point between the top of the capture box and the transfer box, and is connected to the inside of the reagent box and the transfer box; the liquid discharge port is arranged at the bottom of the capture box, and is connected to the inside of the reagent box; Furthermore, a sealing cover is provided at one end of the liquid inlet pipe; and a sealing cover is also provided at the liquid discharge port.

6. The device for capturing carbon dioxide from cement kiln flue gas according to claim 1, characterized in that: The second propulsion unit includes a second telescopic rod motor, a second telescopic rod and a second propulsion block; the second telescopic rod motor is arranged at one side of the transfer box; the fixed end of the second telescopic rod is connected to the second telescopic rod motor; the second propulsion block is connected to the movable end of the second telescopic rod; Furthermore, the second propulsion block is in airtight contact with the inner wall of the transfer box.

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