Flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device

Abstract

The utility model provides a flue gas first-stage carbon dioxide enrichment negative pressure variable temperature recovery device which comprises a fine dust removal device, the output end of the fine dust removal device is connected with a flue gas induced draft fan and a CO2 gas adsorption tower through pipelines, the output end of the flue gas induced draft fan is connected with a flue gas first-stage CO2 enrichment tower through a pipeline, and the output end of the flue gas first-stage CO2 enrichment tower is connected with a CO2 gas adsorption tower through a pipeline. The enriched CO2 gas buffer gas storage cabinet is connected to the output end of the flue gas primary CO2 enrichment tower through a pipeline, and the output end of the enriched CO2 gas buffer gas storage cabinet is connected with an enriched CO2 gas pressurization cooling device and a flue gas dehydration device through pipelines. According to the flue gas primary carbon dioxide enrichment negative-pressure variable-temperature recovery device provided by the utility model, firstly, fine dust removal is carried out on flue gas of a non-ferrous metallurgical furnace, the dust content is reduced to 0.5 mg / Nm, the service life of a CO2 enrichment membrane is prolonged, and poisoning of an adsorbent in an adsorption tower can be effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to nonferrous metallurgy and gas separation field especially, a kind of flue gas primary carbon dioxide enrichment negative pressure temperature change recovery device. BACKGROUND

[0002] Nonferrous metallurgical industry is different from steel metallurgy, and it has problems such as multiple components coexistence of flue gas, high content of harmful substances such as sulfur species, large gas temperature fluctuation, high water vapor content and the like in smelting process, resulting in low carbon dioxide capture efficiency, short service life of equipment, high energy consumption, insufficient utilization of carbon dioxide resources of metallurgical furnace, and severe emission reduction situation.

[0003] Therefore, it is necessary to provide a flue gas primary carbon dioxide enrichment negative pressure temperature change recovery device to solve the above technical problems. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of flue gas primary carbon dioxide enrichment negative pressure temperature change recovery device, solve the existing carbon dioxide capture technology cannot be applied to the carbon dioxide capture field of complex flue gas of nonferrous metallurgical furnace, and the problems of high energy consumption and low capture efficiency of prior art.

[0005] To solve the above technical problems, the utility model provides a kind of flue gas primary carbon dioxide enrichment negative pressure temperature change recovery device, comprising:

[0006] Fine dust removal device, the output end of the fine dust removal device is connected with flue gas induced draft fan and CO2 gas adsorption tower through pipeline, the output end of the flue gas induced draft fan is connected with flue gas primary CO2 enrichment tower through pipeline;

[0007] Enriched CO2 gas buffer gas storage cabinet, the enriched CO2 gas buffer gas storage cabinet is connected to the output end of the flue gas primary CO2 enrichment tower through pipeline, and the output end of the enriched CO2 gas buffer gas storage cabinet is connected with enriched CO2 gas pressurizing cooling device and flue gas dehydration device through pipeline;

[0008] The output end of the CO2 gas adsorption tower is connected with negative pressure vacuum recovery CO2 device, adsorption tower cooling device, first solar heat conducting oil heating device and third solar heat conducting oil heating device through pipeline respectively;

[0009] Carbon dioxide storage cabinet, the carbon dioxide storage cabinet is connected to the output end of the negative pressure vacuum recovery CO2 device through pipeline;

[0010] Enriched CO2 gas pressurized back-blowing device, the enriched CO2 gas pressurized back-blowing device is connected to the output end of the fine dust removal device through pipeline;

[0011] The second solar heat conducting oil heating device 13a is connected to the output end of the flue gas dewatering device through a pipeline.

[0012] Preferably, the CO2-rich gas pressurized back-blowing device is connected to the flue gas dewatering device through a pipeline.

[0013] Preferably, the adsorption tower cooling device is connected to the CO2 storage tank through a pipeline.

[0014] Preferably, the CO2-rich gas pressurized cooling device is connected to the CO2-rich gas pressurized back-blowing device and the second solar heat conducting oil heating device respectively through pipelines.

[0015] Preferably, one side of the flue gas induced draft fan is provided with a dismounting assembly, and the dismounting assembly 15a comprises a dismounting cover, and the surface of the dismounting cover and the surface of the flue gas induced draft fan are connected with a first circular block and a second circular block respectively.

[0016] Preferably, a bolt is arranged between the first circular block and the second circular block.

[0017] Preferably, a threaded sleeve is threadedly connected to the surface of the bolt.

[0018] Compared with the related art, the flue gas primary CO2 enrichment negative pressure variable temperature recovery device has the following beneficial effects:

[0019] The flue gas primary CO2 enrichment negative pressure variable temperature recovery device provided by the utility model firstly performs fine dust removal on non-ferrous metallurgical furnace flue gas, reduces the dust content to 0.5 mg / Nm³, prolongs the service life of the CO2 enrichment membrane, and can effectively prevent poisoning of the adsorbent in the adsorption tower.

[0020] The CO2 content in the flue gas is pre-enriched to 20%, which can greatly reduce the energy consumption of pressurized cooling of the flue gas.

[0021] The solar heat conducting oil heating system is used to dry and evaporate water in the flue gas dewatering device, the superabsorbent resin particles can be reused, the superabsorbent resin is avoided from being repeatedly filled, and the workload is reduced.

[0022] The solar heat conducting oil heating system is used to perform variable temperature desorption on the adsorption tower, and the desorption efficiency of the adsorption tower is improved under the working condition of 200 DEG C of the heat conducting oil.

[0023] The solar heat conducting oil heating system is used, and the energy consumption index of the whole device is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1The utility model provides a kind of structure schematic view of the first embodiment of a flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device provided by the utility model.

[0025] Figure 2 The utility model provides a kind of structure schematic view of the second embodiment of a flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device provided by the utility model.

[0026] Figure 3 For Figure 2 As shown in the enlarged schematic view of A part.

[0027] In the drawing, 1a, fine dust removal device; 2a, flue gas induced draft fan; 3a, flue gas primary CO2 enrichment tower; 4a, enrichment CO2 gas buffer gas storage tank; 5a, enrichment CO2 gas pressurizing cooling device; 6a, flue gas dehydration device; 7a, CO2 gas adsorption tower; 8a, negative pressure vacuum recovery CO2 device; 9a, adsorption tower cooling device; 10a, carbon dioxide gas storage tank; 11a, first solar heat conducting oil heating device; 12a, enrichment CO2 gas pressurized back spray blowing device; 13a, second solar heat conducting oil heating device; 14a, third solar heat conducting oil heating device; 15a, disassembly assembly; 151a, disassembly cover; 152a, first circular block; 153a, second circular block; 154a, bolt; 155a, threaded sleeve. DETAILED DESCRIPTION

[0028] The utility model will be further described below in connection with the drawings and embodiments.

[0029] First embodiment

[0030] Please refer to Figure 1 Among them, Figure 1 The utility model provides a kind of structure schematic view of the first embodiment of a flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device. A kind of flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device, comprising:

[0031] Fine dust removal device 1a, the output end of the fine dust removal device 1a is connected with flue gas induced draft fan 2a and CO2 gas adsorption tower 7a by pipeline, the output end of the flue gas induced draft fan 2a is connected with flue gas primary CO2 enrichment tower 3a by pipeline;

[0032] Enrichment CO2 gas buffer gas storage tank 4a, the enrichment CO2 gas buffer gas storage tank 4a is connected to the output end of the flue gas primary CO2 enrichment tower 3a by pipeline, the output end of the enrichment CO2 gas buffer gas storage tank 4a is connected with enrichment CO2 gas pressurizing cooling device 5a and flue gas dehydration device 6a by pipeline;

[0033] The output end of the CO2 gas adsorption tower 7a is connected with a negative pressure vacuum recovery CO2 device 8a, an adsorption tower cooling device 9a, a first solar heat conducting oil heating device 11a and a third solar heat conducting oil heating device 14a through pipes respectively;

[0034] A carbon dioxide storage tank 10a is connected to the output end of the negative pressure vacuum recovery CO2 device 8a through a pipe;

[0035] A CO2-rich gas pressurized back-blowing device 12a is connected to the output end of the fine dust removal device 1a through a pipe;

[0036] A second solar heat conducting oil heating device 13a is connected to the output end of the flue gas dewatering device 6a through a pipe.

[0037] The CO2-rich gas pressurized back-blowing device 12a is connected to the flue gas dewatering device 6a through a pipe.

[0038] The adsorption tower cooling device 9a is connected to the carbon dioxide storage tank 10a through a pipe.

[0039] The CO2-rich gas pressurized cooling device 5a is connected to the CO2-rich gas pressurized back-blowing device 12a and the second solar heat conducting oil heating device 13a through pipes respectively.

[0040] It is suitable for complex flue gas conditions of non-ferrous metallurgical furnace, the flue gas CO2 content is generally about 5%, and contains F-, CL-, sulfide and other harmful substances, after passing through the furnace dust removal system, the dust particle reaches 10mg / Nm³ emission; after passing through the fine dust removal device 1a, the dust particle content in the flue gas reaches 0.5mg / Nm³, and then the flue gas is introduced into the flue gas primary CO2 enrichment tower 3a, and the enriched CO2 gas is temporarily stored in the CO2 gas buffer storage tank 4a; the exhaust gas formed by the flue gas primary CO2 enrichment tower 3a is discharged to the original flue gas system; the enriched CO2 flue gas is first pressurized to 0.7Mpa by the enriched CO2 gas pressurizing and cooling device 5a, and then cooled to 10℃; the cold flue gas enters the flue gas dehydration device (6), and the water in the flue gas is removed; the dry flue gas enters the CO2 gas adsorption tower 7a for CO2 gas adsorption; the CO2 gas adsorption tower 7a is designed to have three working states: one is adsorption state, the second is variable temperature negative pressure desorption state, and the third is CO2 gas cooling tower body state, so three CO2 gas adsorption towers 7a are arranged in parallel; the adsorbed CO2 gas is sucked out by the negative pressure vacuum CO2 recovery device 8a and pumped into the carbon dioxide storage tank 10a; the exhaust gas generated by the adsorption tower is returned to the inlet of the flue gas primary CO2 enrichment tower 3a for re-enrichment to improve the capture efficiency; after the variable temperature desorption CO2, the low-temperature adsorption tower cooling device 9a is opened, the low-temperature CO2 gas is used to cool the adsorption tower, and the used low-temperature CO2 gas is recovered to the carbon dioxide storage tank 10a.

[0041] The first solar heat conducting oil heating device 11a is responsible for providing the required high-temperature heat conducting oil for the negative pressure vacuum CO2 recovery device 8a, because the heat conducting oil does not change phase under the working temperature condition, so when the ordinary solar heat collecting pipe is used, the working temperature of the heat conducting oil can be as high as 200℃.

[0042] The CO2-rich gas pressurized back-blowing device 12a of the fine dust removal device 1a uses the gas pressurized by the CO2-rich gas pressurizing and cooling device 5a to back-blow the filter element.

[0043] Specifically, preferably, the fine dust removal device 1a is arranged at the inlet position of the carbon dioxide negative pressure variable temperature recovery device, and the fine dust removal device is designed to have a dust removal precision less than 0.5mg / Nm³ to meet the working requirements of the flue gas primary CO2 enrichment tower 3a and the CO2 gas adsorption tower 7a, and prevent the enrichment membrane and the adsorbent from failing.

[0044] Compared with the related art, the flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device has the following beneficial effects:

[0045] The utility model provides a kind of flue gas primary carbon dioxide enrichment negative pressure temperature change recovery device, first nonferrous metallurgical furnace flue gas is carried out fine dust removal, dust content is reduced to 0.5mg / Nm 3, prolongs the service life of CO 2 enrichment membrane, and effectively prevent poisoning in the adsorption tower inside adsorbent.

[0046] CO 2 content in flue gas is enriched to 20% in advance, which can greatly reduce the energy consumption of pressurized cooling of flue gas.

[0047] The solar heat conducting oil heating system is used to dry and evaporate water from the flue gas dehydration device, and the high water-absorbing resin particles can be reused, avoiding repeated loading of water-absorbing resin and reducing the workload.

[0048] The solar heat conducting oil heating system is used to desorb the adsorption tower at variable temperature, and the desorption efficiency of the adsorption tower is improved under the working condition of heat conducting oil at 200℃.

[0049] The solar heat conducting oil heating system is used to reduce the energy consumption index of the entire device.

[0050] Second embodiment

[0051] Please refer to Figure 2 and Figure 3 , based on the first embodiment of the present application, the second embodiment of the present application provides another flue gas primary carbon dioxide enrichment negative pressure temperature change recovery device. The second embodiment is only a preferred way of the first embodiment, and the implementation of the second embodiment does not affect the separate implementation of the first embodiment.

[0052] Specifically, the second embodiment of the present application provides a kind of flue gas primary carbon dioxide enrichment negative pressure temperature change recovery device, which is different from the first embodiment of the present application, a kind of flue gas primary carbon dioxide enrichment negative pressure temperature change recovery device, the side of the flue gas induced draft fan 2a is provided with disassembly assembly 15a, the disassembly assembly 15a includes disassembly cover 151a, the surface of the disassembly cover 151a and the surface of the flue gas induced draft fan 2a are connected with first circular block 152a and second circular block 153a respectively.

[0053] A plurality of threaded holes matched with bolts 154a are formed between the first circular block 152a and the second circular block 153a, and a circular connecting block is connected to one side of the disassembly cover 151a, which facilitates the clamping of the disassembly cover 151a on one side of the flue gas induced draft fan 2a.

[0054] The first circular block 152a and the second circular block 153a are provided with bolts 154a.

[0055] The surface of the bolt 154a is threadedly connected with a threaded sleeve 155a.

[0056] The working principle of the smoke primary carbon dioxide enrichment negative pressure variable temperature recovery device is as follows:

[0057] When the dust inside the smoke induced draft fan 2a is cleaned, the threaded sleeve 155a on the surface of the bolt 154a is first removed, the bolt 154a between the first circular block 152a and the second circular block 153a is removed after the threaded sleeve 155a is removed, and the first circular block 152a is separated from the smoke induced draft fan 2a by pulling the dismounting cover 151a to drive the first circular block 152a, so that the internal components of the smoke induced draft fan 2a can be cleaned.

[0058] Compared with the related art, the smoke primary carbon dioxide enrichment negative pressure variable temperature recovery device has the following beneficial effects:

[0059] The smoke primary carbon dioxide enrichment negative pressure variable temperature recovery device provided by the utility model is provided with the dismounting assembly 15a on one side of the smoke induced draft fan 2a, and the shell can be dismounted after long-time use of the smoke induced draft fan 2a, so that the internal dust can be cleaned.

[0060] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation by using the content of the utility model specification and drawings or direct or indirect application in other related technical fields is also included in the patent protection range of the utility model.

Claims

1. A flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device, characterized in that, include: A fine dust removal device, wherein the output end of the fine dust removal device is connected to a flue gas induced draft fan and a CO2 gas adsorption tower via a pipeline, and the output end of the flue gas induced draft fan is connected to a flue gas primary CO2 enrichment tower via a pipeline. A CO2 enrichment buffer storage tank is provided, which is connected to the output end of the primary CO2 enrichment tower of the flue gas via a pipeline. The output end of the CO2 enrichment buffer storage tank is connected to a CO2 enrichment pressurization and cooling device and a flue gas dehydration device via a pipeline. The output end of the CO2 gas adsorption tower is connected to a negative pressure vacuum CO2 recovery device, an adsorption tower cooling device, a first solar thermal oil heating device, and a third solar thermal oil heating device via pipelines. A carbon dioxide storage tank, which is connected to the output end of the negative pressure vacuum CO2 recovery device via a pipeline; A CO2-rich gas pressurized reverse jet cleaning device, wherein the CO2-rich gas pressurized reverse jet cleaning device is connected to the output end of the fine dust removal device via a pipeline; The second solar thermal oil heating device (13a) is connected to the output end of the flue gas dehydration device via a pipeline.

2. The flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device according to claim 1, characterized in that, The CO2-rich gas pressurized reverse jet blowing device is connected to the flue gas dehydration device via a pipeline.

3. The flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device according to claim 1, characterized in that, The adsorption tower cooling device is connected to the carbon dioxide storage tank via a pipeline.

4. The flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device according to claim 1, characterized in that, The CO2-enriched gas pressurized cooling device is connected to the CO2-enriched gas pressurized reverse jet device and the second solar thermal oil heating device via pipelines.

5. The flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device according to claim 1, characterized in that, A disassembly assembly is provided on one side of the flue gas induced draft fan. The disassembly assembly (15a) includes a disassembly cover, and a first circular block and a second circular block are respectively connected to the surface of the disassembly cover and the surface of the flue gas induced draft fan.

6. The flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device according to claim 5, characterized in that, A bolt is provided between the first circular block and the second circular block.

7. The flue gas primary carbon dioxide enrichment negative pressure variable temperature recovery device according to claim 6, characterized in that, The bolt has a threaded sleeve on its surface.

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