Waste gas recycling device in carbon dioxide adsorbent production

Abstract

The utility model relates to the technical field of carbon dioxide adsorbent production, in particular to a waste gas recycling device in carbon dioxide adsorbent production. The waste gas recycling device in carbon dioxide adsorbent production comprises a cleaning tank, the cleaning tank is connected with a mixing tank through a grinding box, the mixing tank is connected with a drying box through an extrusion forming machine, the drying box is connected with a roasting activation furnace, the drying box is connected with a condensation tank, and the roasting activation furnace is connected with an absorption tower through a heat exchanger. According to the device, through cooperative use of the drying box and the condensation tank, heat exchange is carried out on high-temperature air discharged by the drying box, and heated water is used for mixing and burdening of additives, so that the burdening efficiency of the additives is greatly improved, and the energy utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon dioxide adsorbent production, in particular to a waste gas recycling device in the production of carbon dioxide adsorbent. Background Art

[0002] Carbon dioxide adsorbent refers to a class of substances that can selectively adsorb carbon dioxide gas. According to the composition and adsorption principle of the adsorbent, it can be mainly divided into physical adsorbents and chemical adsorbents. Physical adsorbents include activated carbon, molecular sieves, etc. Activated carbon has a highly developed pore structure and a large specific surface area, and can adsorb carbon dioxide through intermolecular forces (van der Waals forces). Chemical adsorbents include alkali metal oxides, alkali metal hydroxides, and some metal organic framework materials (MOFs). In practical applications, alkali metal carbon dioxide adsorbents are widely used.

[0003] The production process of alkali metal carbon dioxide adsorbents generally includes steps such as raw material preparation, mixing, molding, drying and activation. In actual production, a large amount of waste gas is often generated during the process of raw material preparation (grinding), drying and activation. Existing devices adopt a centralized collection method for treatment, which often leads to low treatment efficiency and difficulty, and a large amount of useful substances in the waste gas are wasted, which is not worth the cost. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide a waste gas recycling device in the production of carbon dioxide adsorbent, through the coordinated use of a drying box and a condensing tank, the high-temperature air discharged from the drying box is heat exchanged, and the heated water is used for mixing and proportioning of additives, which greatly improves the additive proportioning efficiency and improves the energy utilization rate; through the coordinated use of an absorption tower, a decomposition tower, a recovery tank and an activated carbon adsorption tower, the high-temperature waste gas containing a large amount of carbon dioxide discharged from the roasting activation furnace is recovered and treated, the heat is used in the pre-drying box, and the carbon dioxide is recycled and reused in the recovery tank after being treated by the absorption tower and the decomposition tower, and the remaining organic gases are adsorbed and recovered by the activated carbon adsorption tower, which greatly improves the waste gas treatment efficiency and saves production costs.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The waste gas recycling device in the production of carbon dioxide adsorbent includes a cleaning tank, which is connected to a mixing tank through a grinding tank, which is connected to a drying box through an extrusion molding machine, which is connected to a roasting activation furnace, which is connected to a condensing tank, and which is connected to an absorption tower through a heat exchanger.

[0007] A pre-drying box is arranged between the cleaning tank and the grinding box, a pre-drying box coil is arranged inside the pre-drying box, and a heat exchanger is connected with the pre-drying box coil through a heat exchange pipe.

[0008] The grinding box is provided with a grinding wheel driven by a motor inside, and a regulator is connected to the grinding box, and the regulator is connected to the bag dust collector through a cyclone separator. The particles filtered by the cyclone separator are collected and returned to the grinding box.

[0009] The condensing tank is provided with a condensing tank coil inside, the drying box is connected to the condensing tank coil through a pipeline, the condensing tank is connected to the additive batching tank through a pipeline, and the additive batching tank is connected to the mixing tank.

[0010] The heat exchanger is connected to the analysis tower through the absorption tower, and the analysis tower is connected to a recovery tank.

[0011] The top of the absorption tower is connected to the activated carbon adsorption tower through a pipeline, and the interior of the activated carbon adsorption tower is provided with an inclined bottom plate with holes.

[0012] A barrel-shaped isolation net is arranged above the inclined bottom plate with holes, and the activated carbon is located between the vertical wall of the activated carbon adsorption tower and the barrel-shaped isolation net.

[0013] The activated carbon adsorption tower is provided with an activated carbon feed port, and the vertical wall of the activated carbon adsorption tower is provided with an activated carbon discharge port and a vibrator.

[0014] When the efficiency of activated carbon decreases, open the vibrator and the activated carbon discharge port, the activated carbon is discharged by gravity, and new activated carbon is added through the activated carbon feed port.

[0015] The raw materials are pre-dried and dried in an oven at 100℃-120℃ for 2-4 hours to remove moisture from the raw materials to prevent affecting subsequent reactions. Stir and mix at room temperature and pressure, with a stirring speed of 100-500 rpm and a time of 1-3 hours to ensure that the raw materials are fully mixed and uniform. During extrusion molding, the pressure is generally controlled at 5-20MPa; during tablet molding, the pressure is between 10-50MPa; the hot air drying temperature is 80℃-150℃, and the drying time is 2-6 hours; activation is carried out by high-temperature calcination and other methods, with a calcination temperature between 300℃-600℃ and a time of 2-6 hours to increase the porosity and specific surface area of ​​the adsorbent and enhance the adsorption performance. Activation is carried out under a specific atmosphere, and carbon dioxide is introduced with a gas flow rate of 10-50 ml / min to prevent the adsorbent from oxidizing at high temperatures or other adverse reactions.

[0016] The working principle of the utility model is:

[0017] After the raw materials are cleaned in the cleaning tank, they enter the pre-drying box for drying. After drying, they enter the grinding box for processing, and the regulator, cyclone separator and bag dust collector start working. After the processing, the raw materials enter the mixing tank and add additives; after mixing, they are extruded by the extruder, and then enter the drying box and the roasting activation furnace for processing in turn; the high-temperature air discharged from the drying box is heat exchanged by the condensing tank, and the heated water is used for mixing and proportioning of additives; the high-temperature exhaust gas generated by the roasting activation furnace enters the absorption tower after passing through the heat exchanger, the absorbed gas enters the recovery tank through the analysis tower, and the unabsorbed gas enters the activated carbon adsorption tower for processing.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] By adopting the waste gas recycling device in the production of carbon dioxide adsorbent of the utility model, the high-temperature air discharged from the drying box is heat exchanged through the coordinated use of the drying box and the condensing tank, and the heated water is used for mixing and proportioning of additives, which greatly improves the proportioning efficiency of the additives and improves the energy utilization rate; through the coordinated use of the absorption tower, the analysis tower, the recovery tank and the activated carbon adsorption tower, the high-temperature waste gas containing a large amount of carbon dioxide discharged from the roasting activation furnace is recovered and treated, the heat is used in the pre-drying box, the carbon dioxide is recycled and reused in the recovery tank after being treated by the absorption tower and the analysis tower, and the remaining organic gases are adsorbed and recovered by the activated carbon adsorption tower, which greatly improves the waste gas treatment efficiency and saves production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the waste gas recycling device in the production of carbon dioxide adsorbent of the utility model;

[0021] In the figure: 1. cleaning tank; 2. grinding box; 3. mixing tank; 4. extrusion molding machine; 5. drying box; 6. roasting and activation furnace; 7. pre-drying box; 8. grinding wheel; 9. regulator; 10. cyclone separator; 11. bag filter; 12. additive batching tank; 13. condensation tank; 14. condensation tank coil; 15. heat exchanger; 16. absorption tower; 17. analysis tower; 18. recovery tank; 19. activated carbon adsorption tower; 20. inclined bottom plate with holes; 21. activated carbon feed port; 22. activated carbon discharge port; 23. vibrator; 24. heat exchange pipeline. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Example 1

[0024] like Figure 1As shown, the waste gas recycling device in the production of carbon dioxide adsorbent includes a cleaning tank 1, which is connected to a mixing tank 3 through a grinding box 2, and the mixing tank 3 is connected to a drying box 5 through an extruder 4. The drying box 5 is connected to a roasting activation furnace 6, and the drying box 5 is connected to a condensing tank 13. The roasting activation furnace 6 is connected to an absorption tower 16 through a heat exchanger 15. A pre-drying box 7 is provided between the cleaning tank 1 and the grinding box 2, and a pre-drying box coil is provided inside the pre-drying box 7. The heat exchanger 15 is connected to the pre-drying box coil through a heat exchange pipe 24. A grinding wheel 8 driven by a motor is provided inside the grinding box 2, and a regulator 9 is connected to the grinding box 2, and the regulator 9 is connected to a bag dust collector 11 through a cyclone separator 10. The particles filtered by the cyclone separator 10 are collected and returned to the grinding box 2. The condenser 13 is provided with a condenser coil 14 inside, the drying box 5 is connected to the condenser coil 14 through a pipeline, the condenser 13 is connected to the additive batching tank 12 through a pipeline, and the additive batching tank 12 is connected to the mixing tank 3. The heat exchanger 15 is connected to the analytical tower 17 through the absorption tower 16, and the analytical tower 17 is connected to the recovery tank 18. The upper part of the absorption tower 16 is connected to the activated carbon adsorption tower 19 through a pipeline, and the activated carbon adsorption tower 19 is provided with an inclined perforated bottom plate 20 inside. A barrel-shaped isolation net is provided above the inclined perforated bottom plate 20, and the activated carbon is located between the vertical wall of the activated carbon adsorption tower 19 and the barrel-shaped isolation net. The activated carbon adsorption tower 19 is provided with an activated carbon feed port 21, and the vertical wall of the activated carbon adsorption tower 19 is provided with an activated carbon discharge port 22 and a vibrator 23.

[0025] The above-mentioned waste gas recycling device in the production of carbon dioxide adsorbent, when working, includes the following steps:

[0026] (1) After the raw materials are cleaned in the cleaning tank 1, they enter the pre-drying box 7 for drying. After drying, they enter the grinding box 2 for processing. The regulator 9, cyclone separator 10 and bag filter 11 start working. After processing, the raw materials enter the mixing tank 3 and additives are added; (2) After mixing, they are extruded by the extruder 4 and then enter the drying box 5 and the roasting and activation furnace 6 for processing in turn; the high-temperature air discharged from the drying box 5 is heat exchanged by the condensing tank 13, and the heated water is used for mixing and proportioning of additives; (3) The high-temperature exhaust gas generated by the roasting and activation furnace 6 enters the absorption tower 16 after passing through the heat exchanger 15. The absorbed gas enters the recovery tank through the analysis tower 17, and the unabsorbed gas enters the activated carbon adsorption tower 19 for processing.

Claims

1. A waste gas recycling device in the production of carbon dioxide adsorbent, characterized in that: The invention comprises a cleaning tank (1), wherein the cleaning tank (1) is connected to a mixing tank (3) via a grinding tank (2), the mixing tank (3) is connected to a drying box (5) via an extrusion molding machine (4), the drying box (5) is connected to a roasting and activation furnace (6), the drying box (5) is connected to a condensing tank (13), and the roasting and activation furnace (6) is connected to an absorption tower (16) via a heat exchanger (15).

2. The waste gas recycling device in the production of carbon dioxide adsorbent according to claim 1, characterized in that: A pre-drying box (7) is provided between the cleaning tank (1) and the grinding box (2), a pre-drying box coil is provided inside the pre-drying box (7), and the heat exchanger (15) is connected to the pre-drying box coil via a heat exchange pipe (24).

3. The waste gas recycling device in the production of carbon dioxide adsorbent according to claim 1, characterized in that: The grinding box (2) is provided with a grinding wheel (8) driven by a motor inside, and a regulator (9) is connected to the grinding box (2), and the regulator (9) is connected to a bag dust collector (11) via a cyclone separator (10).

4. The waste gas recycling device in the production of carbon dioxide adsorbent according to claim 1, characterized in that: The condensing tank (13) is provided with a condensing tank coil (14) inside, the drying box (5) is connected to the condensing tank coil (14) via a pipeline, the condensing tank (13) is connected to the additive batching tank (12) via a pipeline, and the additive batching tank (12) is connected to the mixing tank (3).

5. The waste gas recycling device in the production of carbon dioxide adsorbent according to claim 1, characterized in that: The heat exchanger (15) is connected to the analysis tower (17) via the absorption tower (16), and the analysis tower (17) is connected to a recovery tank (18).

6. The waste gas recycling device in the production of carbon dioxide adsorbent according to claim 5, characterized in that: The top of the absorption tower (16) is connected to an activated carbon adsorption tower (19) via a pipeline, and an inclined bottom plate (20) with holes is provided inside the activated carbon adsorption tower (19).

7. The waste gas recycling device in the production of carbon dioxide adsorbent according to claim 6, characterized in that: A barrel-shaped isolation net is provided above the inclined perforated bottom plate (20), and the activated carbon is located between the vertical wall of the activated carbon adsorption tower (19) and the barrel-shaped isolation net.

8. The waste gas recycling device in the production of carbon dioxide adsorbent according to claim 6, characterized in that: The activated carbon adsorption tower (19) is provided with an activated carbon feed port (21), and the vertical wall of the activated carbon adsorption tower (19) is provided with an activated carbon discharge port (22) and a vibrator (23).

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