Carbon dioxide capture device for fine desulfurization of blast furnace gas

Abstract

A carbon dioxide capture device for fine desulfurization of blast furnace gas comprises a device shell, a filter box, a filter system and an air drying device, the filter box is arranged in the device shell, an air inlet and an air outlet are formed in one side of the filter box, and a through opening is formed in the middle of the filter box from top to bottom; the filtering system comprises a filtering layer, a driving part, a first reagent tank and a second reagent tank; the filtering layer is rotationally arranged on the driving part, penetrates through the first reagent groove and the second reagent groove, and penetrates through the through hole of the filtering box; the air drying device is arranged in the device shell, an air outlet is further formed in one side of the device shell, and the air drying device is arranged beside the air outlet. An automatic capturing process is adopted for capturing carbon dioxide in coal gas, and the problem that the carbon dioxide reacts with a desulfurizing agent, and consequently the desulfurizing agent is wasted is solved.

Description

Technical Field

[0001] The utility model relates to carbon dioxide capture, in particular to a carbon dioxide capture device for blast furnace gas fine desulfurization. Background Art

[0002] With the development of the national economy and the increasing requirements for energy conservation and emission reduction, large and medium-sized steel mills have a new understanding of environmental protection and energy conservation and emission reduction, and their investment in environmental protection and energy conservation is increasing. At present, the blast furnace gas of each steel mill is generally equipped with a desulfurization system. The carbon dioxide content in the blast furnace gas is generally 8-15%, and even the carbon dioxide content of the gas of some blast furnaces is as high as 20-22%. Carbon dioxide has no utilization value in the gas, and the high content has a great impact on the desulfurization system. While the gas is desulfurized, carbon dioxide and desulfurizer will react, consuming more desulfurizer, and generating more desulfurization slag that needs to be processed, causing great waste.

[0003] Therefore, there is a need for a carbon dioxide capture device for fine desulfurization of blast furnace gas to capture carbon dioxide in the gas and avoid the problem of reaction between carbon dioxide and desulfurizer, which leads to waste of desulfurizer. Utility Model Content

[0004] The utility model aims to provide a carbon dioxide capture device for fine desulfurization of blast furnace gas, which is used for capturing carbon dioxide in the gas and avoiding the problem of waste of the desulfurizer caused by reaction between carbon dioxide and desulfurizer.

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

[0006] A carbon dioxide capture device for blast furnace gas fine desulfurization, comprising:

[0007] Device housing;

[0008] A filter box, the filter box is arranged inside the device housing, one side of the filter box is provided with an air inlet and an air outlet, and the middle part thereof is provided with a through hole from top to bottom, the air inlet and the air outlet are connected to the device housing and communicate with the outside thereof;

[0009] A filtration system, the filtration system is arranged inside the device housing, and comprises a filtration layer, a driving part, a first reagent tank and a second reagent tank; the filtration layer is rotatably arranged on the driving part, passes through the first reagent tank and the second reagent tank, and passes through the through-opening of the filtration box;

[0010] An air drying device, the air drying device is arranged inside the device housing, an air outlet is also arranged on one side of the device housing, and the air drying device is arranged next to the air outlet;

[0011] Furthermore, the first reagent tank is filled with an adsorption reagent, and the second reagent tank is filled with a cleaning reagent.

[0012] An air inlet connection port and an air outlet connection port are provided on one side of the device shell, the air inlet connection port is connected to the air inlet, and the air outlet connection port is connected to the air outlet; a plurality of through holes are provided at the air outlet on one side of the device shell; and supporting feet are also provided at the four corners of the bottom of the device shell.

[0013] The filter box is provided with a serpentine channel inside, and the two ends of the serpentine channel are respectively an air inlet and an air outlet; the filter box is provided with a through hole from the top surface to the bottom surface, and passes through the serpentine channel inside it; the filter layer passes through the through hole and the serpentine channel;

[0014] Furthermore, a seal is provided at the interface between the filter layer and the through opening of the filter box.

[0015] The filtration system comprises a filtration layer, a driving unit, a first reagent tank and a second reagent tank;

[0016] The first reagent tank is arranged above one side of the filter box; the second reagent tank is arranged below one side of the filter box;

[0017] The driving part includes a rotating shaft, a friction wheel and a driving motor; the driving motor is arranged around the inside of the device housing; one end of the rotating shaft is rotatably arranged on the driving motor; the friction wheel is fixedly wrapped on the rotating shaft; the filtering layer is surrounded by the friction wheel on all sides;

[0018] The first reagent tank is provided with a first liquid inlet pipe, a first liquid outlet pipe, four rotating rods and a first valve; the first liquid inlet pipe is provided on the device housing and connected to the inside of the device housing, and the lower end of the first liquid inlet pipe is located above the first reagent tank; one end of the first liquid outlet pipe is connected to the bottom of the first reagent tank, and the other end is connected to the device housing and extends out; a first valve is also provided on the end of the first liquid outlet pipe extending out of the device housing; the four rotating rods are provided on the inner side of the first reagent tank, two of the rotating rods are close to the inner bottom of the first reagent tank, and two of the rotating rods are located above the first reagent tank;

[0019] Furthermore, the filter layer is surrounded by four rotating rods, so that the filter layer can pass through the interior of the first reagent tank;

[0020] Furthermore, an adsorption reagent is added to the first reagent tank.

[0021] The second reagent tank is provided with a second liquid inlet pipe, a second liquid outlet pipe, four rotating rods and a second valve; the second liquid inlet pipe is provided on the device housing and connected to the inside of the device housing, and the lower end of the second liquid inlet pipe is located above the second reagent tank; one end of the second liquid outlet pipe is connected to the bottom of the second reagent tank, and the other end is connected to the device housing and extends out; a second valve is also provided on the end of the second liquid outlet pipe extending out of the device housing; the four rotating rods are provided on the inner side of the second reagent tank, two of the rotating rods are close to the inner bottom of the second reagent tank, and two of the rotating rods are located above the second reagent tank;

[0022] Furthermore, the filter layer is surrounded by four rotating rods, so that the filter layer can pass through the interior of the second reagent tank;

[0023] Furthermore, a cleaning reagent is added to the second reagent tank.

[0024] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0025] The utility model discloses a carbon dioxide capture device for fine desulfurization of blast furnace gas. First, an air inlet connection port is connected to a blast furnace gas air inlet device. Then, a driving unit is used to drive a filter layer to rotate inside a device shell so that the filter layer passes through an adsorption reagent in a first reagent tank, and is impregnated with the adsorption reagent. The filter layer then passes through a through-hole on a filter box, and the filter layer passes through a serpentine passage inside the filter box. Untreated blast furnace gas enters from the air inlet port, passes through the serpentine passage, and passes through the filter layer multiple times, so that the adsorption reagent on the filter layer adsorbs and removes the carbon dioxide component multiple times, and the removal effect is optimized. The filtered gas is then discharged from the air outlet and collected by a subsequent device. The filtered gas is rotated again through the filter layer of the filter box into a cleaning reagent in a second reagent tank to clean the reagent thereon. The gas is then air-dried under the action of an air-drying device, and then passes through the first reagent tank again.

[0026] The utility model discloses a carbon dioxide capture device for fine desulfurization of blast furnace gas, which adopts an automated capture process. It only needs to add reagents to the device in advance, thus avoiding the problem that the amount of added catalyst is difficult to control due to manual operation, resulting in catalyst waste and low processing efficiency. In addition, multiple filtrations in a single cycle also improve the removal effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the overall structure of the utility model Figure 1 ;

[0029] Figure 3This is a schematic diagram of the overall structure of the utility model Figure 2 .

[0030] In the figure, 1-device housing, 101-support foot, 102-air outlet, 103-air inlet connection port, 104-air outlet connection port, 2-filter box, 201-filter channel, 202-air inlet, 203-air outlet, 301-filter layer, 302-rotating shaft, 303-friction wheel, 304-rotating rod, 4-first reagent tank, 401-first liquid inlet pipe, 402-first liquid outlet pipe, 403-adsorption reagent, 404-first valve, 5-second reagent tank, 501-second liquid inlet pipe, 502-second liquid outlet pipe, 503-cleaning reagent, 504-second valve, 601-fan motor, 602-wind hood, 603-fan, 7-power supply. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] Please refer to Figure 1-3 A carbon dioxide capture device for fine desulfurization of blast furnace gas includes a device housing 1, a filter box 2, a filter system, an air drying device and a power supply 7; the power supply 7 is used to power the entire device and is a prior art, not an improvement of this embodiment, and will not be described in detail here.

[0034] like Figure 2-3As shown, the interior of the device shell 1 is hollow, and an air inlet connection port 103 is provided on the upper left side thereof, and an air outlet connection port 104 is provided on the lower side thereof, which are respectively connected to the interior of the device shell 1; an air outlet 102 is provided on the right side of the device shell 1, and supporting feet 101 are also provided at the four corners of the bottom of the device shell 1; a first liquid inlet pipe 401, a first liquid outlet pipe 402, a second liquid inlet pipe 501 and a second liquid outlet pipe 502 are also provided on the front of the device shell 1; the first liquid inlet pipe 401 is obliquely arranged on the upper side of the front of the device shell 1, and its lower end is connected to the interior of the device shell 1; the first liquid outlet pipe 402 is arranged below the first liquid inlet pipe 401, and one end thereof is connected to the interior of the device shell 1; the second liquid inlet pipe 501 is obliquely arranged on the lower side of the front of the device shell 1, and its lower end is connected to the interior of the device shell 1; the second liquid outlet pipe 502 is arranged below the second liquid inlet pipe 501, and one end thereof is connected to the interior of the device shell 1;

[0035] Specifically, a dust screen is provided at the air outlet 102 to prevent dust from entering the interior of the device;

[0036] Specifically, the first liquid outlet pipe 402 is further provided with a first valve 404 ; the second liquid outlet pipe 502 is further provided with a second valve 504 .

[0037] like Figure 1 As shown, the filter box 2 is hollow inside and is provided with three baffles in parallel. The three baffles are staggered so that one side of the two baffles leaves a gap with the side wall inside the filter box 2, so that a serpentine channel is formed inside the filter box 2; an air inlet 202 is provided above the connection between the top baffle and the filter box 2; an air outlet 203 is provided below the connection between the bottom baffle and the filter box 2; and a strip-shaped through-hole is also provided from the top to the bottom of the filter box 2;

[0038] Specifically, the filter box 2 is disposed inside the device housing 1, the air inlet 202 thereof is disposed at the air inlet connection port 103 of the device housing 1, and the air outlet 203 thereof is disposed at the air outlet connection port 104 of the device housing 1;

[0039] More specifically, a seal is provided at the interface between the filter layer 301 and the through-opening of the filter box 2 .

[0040] like Figure 1 As shown, the filtration system includes a filtration layer 301, a driving unit, 8 rotating rods 304, a first reagent tank 4 and a second reagent tank 5; the first reagent tank 4 is arranged above one side of the filter box 2 inside the device housing 1; the second reagent tank 5 is arranged below the first reagent tank 4; the 8 rotating rods 304 are divided into 4 groups and are respectively arranged in the first reagent tank 4 and the second reagent tank 5; the driving unit is arranged around the inside of the device housing 1; the filtration layer 301 is rotatably arranged on the driving unit, passes through the first reagent tank 4 and the second reagent tank 5, and passes through the through-hole of the filter box 2; the filtration layer 301 is a prior art and is not an improvement of this embodiment, and is not described in detail here;

[0041] Specifically, the driving part includes four rotating shafts 302, four driving motors and four friction wheels 303; the four rotating shafts 302 are respectively arranged above the through-hole at the top of the filter box 2, below the through-hole at the bottom of the filter box 2, above the first reagent tank 4 on the side away from the filter box 2, and below the second reagent tank 5 on the side away from the filter box 2; the four driving motors are respectively connected to the four rotating shafts 302 to drive them to rotate; the four friction wheels 303 are respectively covered and wrapped on the surface of the four rotating shafts 302; the filter layer 301 surrounds the four rotating shafts 302, contacts with the friction wheels 303, and passes through the through-hole of the filter box 2 from top to bottom;

[0042] More specifically, four rotating rods 304 are arranged inside the first reagent tank 4, two rotating rods 304 are close to the inner bottom of the first reagent tank 4 and are placed horizontally, and two rotating rods 304 are located above the first reagent tank 4 and are placed horizontally; another four rotating rods 304 are arranged inside the second reagent tank 5, two rotating rods 304 are close to the inner bottom of the second reagent tank 5 and are placed horizontally, and two rotating rods 304 are located above the second reagent tank 5 and are placed horizontally; the filter layer 301 surrounds the rotating rods 304, so that the filter layer 301 can pass through the bottom of the first reagent tank 4 and the second reagent tank 5;

[0043] More specifically, one end of the first liquid inlet pipe 401 connected to the inside of the device housing 1 is located above the first reagent tank 4; one end of the first liquid outlet pipe 402 connected to the inside of the device housing 1 is connected to the bottom of the first reagent tank 4 and connected to the inside of the first reagent tank 4; one end of the second liquid inlet pipe 501 connected to the inside of the device housing 1 is located above the second reagent tank 5; one end of the second liquid outlet pipe 502 connected to the inside of the device housing 1 is connected to the bottom of the second reagent tank 5 and connected to the inside of the second reagent tank 5;

[0044] More specifically, the first reagent tank 4 is used to load the adsorption reagent 403; the second reagent tank 5 is used to load the cleaning reagent 503;

[0045] More specifically, the adsorption reagent 403 is a phase-change absorbent, and the cleaning reagent 503 is an alcohol cleaning agent. Phase-change absorbents and alcohol cleaning agents are prior arts and are not improvements of this embodiment, and will not be described in detail here.

[0046] like Figure 1 As shown, the air drying device is arranged at one side of the filter box 2, between the first filter tank and the second filter tank, and beside the air outlet 102. The air drying device comprises a fan motor 601, a wind cover 602 and a fan 603; the fan motor 601 is fixed on the inner wall of the device housing 1; the fan 603 is connected to the driving shaft of the fan motor 601; the wind cover 602 is arranged around the outside of the fan 603;

[0047] Specifically, the filter layer 301 passes between the air drying device and the air outlet 102 .

[0048] The working principle of this embodiment is:

[0049] First, the air inlet connection port is connected to the blast furnace gas inlet device, and then the phase change absorbent is poured from the first liquid inlet pipe to flow into the first reagent tank, and the cleaning reagent is poured from the second liquid inlet pipe to flow into the second reagent tank, and then the driving motor drives the rotating shaft to rotate, so that the friction wheel drives the filter layer to move, so that it bypasses the rotating rod and passes through the phase change absorbent in the first reagent tank, so that the filter layer is impregnated with the phase change absorbent, and then enters the interior of the filter box through the through-hole at the top, so that the filter layer passes through the serpentine channel inside the filter box, and then the blast furnace gas inlet device is opened, and untreated blast furnace gas enters from the air inlet, passes through the serpentine channel, and passes through the filter layer for many times, so that the phase change absorbent on the filter layer repeatedly adsorbs and captures the carbon dioxide component in the blast furnace gas, and finally the filtered gas is discharged from the air outlet and collected by the subsequent device, and the filter layer through the filter box is rotated again to the alcohol cleaning agent in the second reagent tank to clean the reagent on it, and then air-dried under the action of the air-drying device, and then passes through the first reagent tank again.

[0050] 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 carbon dioxide capture device for blast furnace gas desulfurization, characterized in that: include: Device housing; A filter box, the filter box is arranged inside the device housing, one side of the filter box is provided with an air inlet and an air outlet, and the middle part thereof is provided with a through hole from top to bottom, the air inlet and the air outlet are connected to the device housing and communicate with the outside thereof; A filtration system, the filtration system is arranged inside the device housing, and includes a filtration layer, a driving unit, a first reagent tank and a second reagent tank; The filter layer is rotatably disposed on the driving part, passes through the first reagent tank and the second reagent tank, and passes through the through-hole of the filter box; An air drying device, the air drying device is arranged inside the device housing, an air outlet is also arranged on one side of the device housing, and the air drying device is arranged next to the air outlet; Furthermore, the first reagent tank is filled with an adsorption reagent, and the second reagent tank is filled with a cleaning reagent.

2. A carbon dioxide capture device for blast furnace gas fine desulfurization according to claim 1, characterized in that: An air inlet connection port and an air outlet connection port are provided on one side of the device shell, the air inlet connection port is connected to the air inlet, and the air outlet connection port is connected to the air outlet; a plurality of through holes are provided at the air outlet on one side of the device shell; and supporting feet are also provided at the four corners of the bottom of the device shell.

3. The carbon dioxide capture device for blast furnace gas desulfurization according to claim 1, characterized in that: The filter box is provided with a serpentine channel inside, and the two ends of the serpentine channel are respectively an air inlet and an air outlet; the filter box is provided with a through hole from the top surface to the bottom surface, and passes through the serpentine channel inside it; the filter layer passes through the through hole and the serpentine channel; Furthermore, a seal is provided at the interface between the filter layer and the through opening of the filter box.

4. The carbon dioxide capture device for blast furnace gas fine desulfurization according to claim 1, characterized in that: The filtration system comprises a filtration layer, a driving unit, a first reagent tank and a second reagent tank; The first reagent tank is arranged above one side of the filter box; The second reagent tank is arranged below one side of the filter box; The driving part includes a rotating shaft, a friction wheel and a driving motor; the driving motor is arranged around the inside of the device shell; one end of the rotating shaft is rotatably arranged on the driving motor; the friction wheel is fixedly wrapped on the rotating shaft; the filtering layer surrounds the friction wheel on all sides.

5. A carbon dioxide capture device for blast furnace gas fine desulfurization according to claim 4, characterized in that: The first reagent tank is provided with a first liquid inlet pipe, a first liquid outlet pipe, four rotating rods and a first valve; the first liquid inlet pipe is provided on the device housing and connected to the inside of the device housing, and the lower end of the first liquid inlet pipe is located above the first reagent tank; one end of the first liquid outlet pipe is connected to the bottom of the first reagent tank, and the other end is connected to the device housing and extends out; a first valve is also provided on the end of the first liquid outlet pipe extending out of the device housing; the four rotating rods are provided on the inner side of the first reagent tank, two of the rotating rods are close to the inner bottom of the first reagent tank, and two of the rotating rods are located above the first reagent tank; Furthermore, the filter layer is surrounded by four rotating rods, so that the filter layer can pass through the interior of the first reagent tank; Furthermore, an adsorption reagent is added to the first reagent tank.

6. A carbon dioxide capture device for blast furnace gas desulfurization according to claim 4, characterized in that: The second reagent tank is provided with a second liquid inlet pipe, a second liquid outlet pipe, four rotating rods and a second valve; the second liquid inlet pipe is provided on the device housing and connected to the inside of the device housing, and the lower end of the second liquid inlet pipe is located above the second reagent tank; one end of the second liquid outlet pipe is connected to the bottom of the second reagent tank, and the other end is connected to the device housing and extends out; a second valve is also provided on the end of the second liquid outlet pipe extending out of the device housing; the four rotating rods are provided on the inner side of the second reagent tank, two of the rotating rods are close to the inner bottom of the second reagent tank, and two of the rotating rods are located above the second reagent tank; Furthermore, the filter layer is surrounded by four rotating rods, so that the filter layer can pass through the interior of the second reagent tank; Furthermore, a cleaning reagent is added to the second reagent tank.

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