A device for co-production of carbon black and hydrogen by carbon dioxide hydrogenation

Abstract

The utility model relates to a device for hydrogen and carbon black cogeneration by carbon dioxide hydrogenation, raw material gas heat exchanger is linked with carbon dioxide and hydrogen inlet pipe intercommunication, raw material gas heat exchanger is linked with methanation reactor intercommunication, raw material gas heat exchanger is linked with methanation reactor intercommunication, raw material gas heat exchanger is linked with the pipeline of gas water separator intercommunication and is installed with water cooler in series, gas water separator is linked with methane heat exchanger intercommunication, methane heat exchanger is linked with methane cracking furnace intercommunication, methane cracking furnace is linked with methane heat exchanger intercommunication, methane heat exchanger is linked with carbon black separator intercommunication, carbon black separator export is linked with carbon black collector intercommunication, carbon black separator export is linked with waste heat boiler intercommunication, waste heat boiler is linked with the pipeline of water cooler and hydrogen compressor intercommunication and is installed with water cooler in series, and the gas outlet of hydrogen compressor is linked with hydrogen collector and the gas inlet of raw material gas heat exchanger intercommunication through tee joint respectively. The utility model has novel and unique structure, and the design is scientific and reasonable, saves resources, uses safety, and is green, environmental protection and energy saving.

Description

Technical Field

[0001] This utility model relates to chemical production equipment, specifically to a device (system) for co-producing carbon black using carbon dioxide and hydrogen. Background Technology

[0002] Carbon black, also known as carbon black, is an important chemical product, mostly made from oil or natural gas. However, due to problems with production equipment, it involves huge investment, high risk, high energy consumption, and large carbon dioxide emissions. In particular, current carbon black products are produced by high-temperature cracking of petroleum coke, with a resource utilization rate of only 60%, which wastes resources and pollutes the environment. Therefore, the improvement and innovation of carbon black production equipment is an urgent technical problem to be solved. Utility Model Content

[0003] In view of the above situation and to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a device for co-producing carbon black using carbon dioxide and hydrogen, which can effectively solve the problems of large investment, high energy consumption, resource waste, environmental pollution and high degree of danger of existing carbon black production equipment.

[0004] The technical solution provided by this utility model is: a device for co-producing carbon black using carbon dioxide and hydrogen, comprising a feed gas heat exchanger, a methanation reactor, a water cooler, a gas-liquid separator, a methane heat exchanger and a cracking furnace, a carbon black separator, and a hydrogen compressor. The first inlet A of the feed gas heat exchanger is connected to the inlet pipes of carbon dioxide and hydrogen; the first outlet C of the feed gas heat exchanger is connected to the inlet of the methanation reactor; the second inlet B of the feed gas heat exchanger is connected to the outlet of the methanation reactor; the second outlet D of the feed gas heat exchanger is connected to the inlet of the first water cooler; the outlet of the first water cooler is connected to the inlet of the gas-liquid separator; and the outlet of the gas-liquid separator is connected to... The first inlet E of the methane heat exchanger is connected to the first outlet G of the methane heat exchanger, which is connected to the inlet of the methane cracking furnace. The outlet of the methane cracking furnace is connected to the second inlet F of the methane heat exchanger, and the second outlet H of the methane heat exchanger is connected to the inlet of the carbon black separator. The carbon black outlet of the carbon black separator is connected to the carbon black collector, and the upper gas outlet of the carbon black separator is connected to the inlet of the waste heat boiler. The waste heat boiler is connected to the inlet of the second water cooler, and the outlet of the second water cooler is connected to the inlet of the hydrogen compressor. The outlet of the hydrogen compressor is connected via a three-way valve to the first inlet A of the hydrogen collector and the raw material gas heat exchanger, thus forming a hydrogen recycling cycle system.

[0005] This utility model features a novel and unique structure, a scientific and reasonable design, and all components are commercially available products that are easy to purchase and have low costs. It utilizes carbon dioxide as a raw material for producing chemical materials and energy products, offering the advantage of zero-carbon and green raw materials. It enables the continuous production of carbon black products by consuming carbon dioxide and allows for the recovery and recycling of hydrogen energy, saving resources and achieving the goal of carbon reduction. It completely changes the situation where traditional coal gasification processes produce products that result in large amounts of unusable carbon dioxide emissions. At the same time, the use of methane catalytic cracking technology in the production process also greatly reduces energy consumption. This is an innovation in carbon black production equipment, which is safe, green, environmentally friendly, and energy-saving, with significant economic and social benefits. Attached Figure Description

[0006] Figure 1 This is a structural (system) block diagram (flow structure block diagram) of the present utility model. Detailed Implementation

[0007] The specific implementation methods of this utility model will be described in detail below with reference to the embodiments and specific circumstances.

[0008] This utility model is provided by the following embodiments in specific implementation:

[0009] Depend on Figure 1 Provided is an apparatus for co-producing carbon black using carbon dioxide and hydrogen, comprising a feed gas heat exchanger, a methanation reactor, a water cooler, a gas-liquid separator, a methane heat exchanger, a cracking furnace, a carbon black separator, and a hydrogen compressor. The first inlet A of the feed gas heat exchanger 1 is connected to the inlet pipes for carbon dioxide and hydrogen; the first outlet C of the feed gas heat exchanger 1 is connected to the inlet of the methanation reactor 2; the second inlet B of the feed gas heat exchanger 1 is connected to the outlet of the methanation reactor 2; the second outlet D of the feed gas heat exchanger 1 is connected to the inlet of the first water cooler 3; the outlet of the first water cooler 3 is connected to the inlet of the gas-liquid separator 4; and the outlet of the gas-liquid separator 4 is connected to the first inlet of the methane heat exchanger 5. Gas outlet E is connected to the first outlet G of methane heat exchanger 5, which is connected to the inlet of methane cracking furnace 6. The outlet of methane cracking furnace 6 is connected to the second inlet F of methane heat exchanger 5. The second outlet H of methane heat exchanger 5 is connected to the inlet of carbon black separator 7. The carbon black outlet of carbon black separator 7 is connected to carbon black collector. The upper gas outlet of carbon black separator 7 is connected to the inlet of waste heat boiler 8. Waste heat boiler 8 is connected to the inlet of second water cooler 9. The outlet of second water cooler 9 is connected to the inlet of hydrogen compressor 10. The outlet of hydrogen compressor 10 is connected to hydrogen collector and the first inlet A of raw material gas heat exchanger 1 via three-way valve 11, forming a hydrogen recycling cycle system.

[0010] To ensure effectiveness and ease of use, a second valve 11-2 is installed on the pipe connecting the first inlet A of the raw material gas heat exchanger 1 to the tee 11, and a first valve 11-1 is installed on the hydrogen outlet pipe of the tee 11.

[0011] The methane cracking furnace 6 is equipped with a natural gas inlet pipe with a third valve 6-1, and an exhaust pipe connected to a chimney is provided on the upper side of the methane cracking furnace 6.

[0012] The inlet of the methanation reactor 2 is located at the top and is connected to the first outlet C on the side of the raw material gas heat exchanger 1 via a pipe. The outlet of the methanation reactor 2 is located at the bottom and is connected to the second inlet B at the top of the raw material gas heat exchanger 1 via a pipe, ensuring both effectiveness and safety.

[0013] The carbon black separator 7 has a carbon black outlet at the bottom and a hydrogen outlet at the top after the carbon black is separated. The hydrogen outlet is connected to the inlet of the waste heat boiler 8 via a pipeline to ensure the reuse and safe use of hydrogen.

[0014] The first water cooler 3 and the second water cooler 9 are provided with cooling water circulation pipes for heat exchange of the water coolers (known technology, not shown in the figure).

[0015] When using this utility model, the device (system) is assembled according to the design requirements and rigorously inspected to ensure that the system assembly meets the design requirements and is safe to use. During production, compressed carbon dioxide (CO2) and hydrogen (H2) are piped into the raw material gas heat exchanger 1 through the first inlet A. After heating, they enter the methanation reactor 2 through the first outlet C. The hydrogen and carbon dioxide react catalytically to produce methane and water gas, which then return to the raw material gas heat exchanger 1. After cooling, the gas enters the first water cooler 3 for further cooling. The gas is then sent to the gas-water separator 4. The methane gas after water separation is sent to the methane heat exchanger 5 for heating, and then sent to the methane cracking furnace 6. Natural gas is introduced to crack the methane gas entering the methane cracking furnace 6, cracking it into hydrogen. The mixture of hydrogen and carbon black, along with the low-carbon gases (low-carbon hydrocarbons) produced, is discharged through a chimney via pipeline. Because the pyrolysis furnace operates at temperatures above 1000℃, methane pyrolysis itself does not produce carbon dioxide, achieving low-carbon emissions and environmental protection. The mixture of hydrogen and carbon black is then returned to the methane heat exchanger 5, where it is cooled and sent to the carbon black separator 7 to separate the carbon black product. The collected product is the finished carbon black. The hydrogen gas, after carbon black separation, enters the waste heat boiler 8 to recover heat. The hydrogen is then sent to the second water cooler 9 for further cooling, and then passes through the compressor 10 and the three-way valve 11, before being sent to the hydrogen collector or, via pipeline through the first inlet A, to the raw material gas heat exchanger 1 for reuse. This constitutes a hydrogen collection or reuse cycle system, reducing resource waste and promoting energy conservation and environmental protection.

[0016] The aforementioned raw material gas heat exchanger is a device that uses high-temperature gas to transfer heat to low-temperature gas. It is used to realize heat exchange between gases in production, and transfers the heat of high-temperature raw material gas to low-temperature gas through heat conduction, convection and other means, so as to realize energy recovery or temperature regulation and reduce energy waste.

[0017] The methanation reactor described herein is a novel reactor structure comprising a hydrogen-to-carbon ratio staged adjustment system and a built-in waste heat boiler, used to convert carbon monoxide and hydrogen into methane.

[0018] The water cooler described is a high-efficiency cooling device with environmentally friendly, safe, and non-corrosive characteristics, and is widely used in chemical production.

[0019] The water separator is used to separate gas and water, with the gas entering the methane heat exchanger 5 and the water being discharged from the drain outlet.

[0020] The methane heat exchanger is a device that uses waste heat to exchange heat with methane. It typically consists of heat exchange tubes, a shell, inlet and outlet flanges, support brackets, and seals. It is used to transfer heat from high-temperature methane to a cooler medium, such as water or air, and is widely used in industrial production.

[0021] The aforementioned methane cracking furnace is a device used to convert methane (CH4) into hydrogen (H2) and carbon through high-temperature cracking. It breaks down methane molecules into hydrogen and carbon at temperatures above 1000°C, while the low-carbon hydrocarbons produced are emitted through a chimney, achieving low-carbon emissions and reducing environmental pollution.

[0022] The carbon black separator is a core piece of equipment in carbon black production, used to separate carbon black from gas (H2) to ensure the purity of subsequent carbon black processing.

[0023] The hydrogen compressor is used to compress hydrogen cooled by the second water cooler 9, and then send it to the hydrogen collector via the three-way valve 11 or to the raw material gas heat exchanger 1 via the pipeline with valve 11-2 for reuse.

[0024] All components of this utility model (including the aforementioned components) are commercially available products. The inventive contribution of this utility model lies in the scientific and rational design of commercially available components to form a device (system) for the co-production of carbon black using carbon dioxide and hydrogen, thereby achieving efficient, safe, energy-saving and environmentally friendly production of carbon black, effectively saving resources, and generating significant economic and social benefits.

[0025] The applicant should also state that the above-described embodiments are merely examples used to illustrate the specific implementation of this utility model, but are not intended to limit the scope of protection of this utility model. Any substitutions and transformations made by equivalent or equivalent means that are essentially the same as the technical solution of this utility model shall fall within the scope of protection of this utility model.

Claims

1. An apparatus for co-producing carbon black using carbon dioxide and hydrogen, comprising a feed gas heat exchanger, a methanation reactor, a water cooler, a gas-water separator, a methane heat exchanger and a cracking furnace, a carbon black separator, and a hydrogen compressor, characterized in that, The first inlet A of the raw gas heat exchanger (1) is connected to the inlet pipes of carbon dioxide and hydrogen. The first outlet C of the raw gas heat exchanger (1) is connected to the inlet of the methanation reactor (2). The second inlet B of the raw gas heat exchanger (1) is connected to the outlet of the methanation reactor (2). The second outlet D of the raw gas heat exchanger (1) is connected to the inlet of the first water cooler (3). The outlet of the first water cooler (3) is connected to the inlet of the gas-liquid separator (4). The outlet of the gas-liquid separator (4) is connected to the first inlet E of the methane heat exchanger (5). The first outlet G of the methane heat exchanger (5) is connected to the inlet of the methane cracking furnace (6). The outlet of the cracking furnace (6) is connected to the second inlet F of the methane heat exchanger (5), the second outlet H of the methane heat exchanger (5) is connected to the inlet of the carbon black separator (7), the carbon black outlet of the carbon black separator (7) is connected to the carbon black collector, the upper gas outlet of the carbon black separator (7) is connected to the air inlet of the waste heat boiler (8), the waste heat boiler (8) is connected to the air inlet of the second water cooler (9), the air outlet of the second water cooler (9) is connected to the inlet of the hydrogen compressor (10), and the air outlet of the hydrogen compressor (10) is connected to the first air inlet A of the hydrogen collector and the raw material gas heat exchanger (1) via a three-way valve (11), forming a hydrogen recycling cycle system.

2. The apparatus for co-producing carbon black using carbon dioxide and hydrogen as described in claim 1, characterized in that, The first inlet A of the raw material gas heat exchanger (1) is connected to the pipe of the three-way valve (11) and a second valve (11-2) is installed on it. The hydrogen outlet pipe of the three-way valve (11) is equipped with a first valve (11-1).

3. The apparatus for co-producing carbon black using carbon dioxide and hydrogen as described in claim 1, characterized in that, The methane cracking furnace (6) is equipped with a natural gas inlet pipe with a third valve (6-1), and the upper side of the methane cracking furnace (6) is equipped with an exhaust pipe connected to the chimney.

4. The apparatus for co-producing carbon black using carbon dioxide and hydrogen as described in claim 1, characterized in that, The inlet of the methanation reactor (2) is located at the top and is connected to the first outlet C on the side of the raw material gas heat exchanger (1) via a pipe. The outlet of the methanation reactor (2) is located at the bottom and is connected to the second inlet B at the top of the raw material gas heat exchanger (1) via a pipe, so as to ensure the effectiveness and safety of use.

5. The apparatus for co-producing carbon black using carbon dioxide and hydrogen as described in claim 1, characterized in that, The carbon black separator (7) has a carbon black outlet at the bottom and a hydrogen outlet at the top after the carbon black is separated. The hydrogen outlet is connected to the inlet of the waste heat boiler (8) via a pipeline to ensure the reuse and safe use of hydrogen.

6. The apparatus for co-producing carbon black using carbon dioxide and hydrogen as described in claim 1, characterized in that, The first water cooler (3) and the second water cooler (9) are provided with cooling water circulation pipes for heat exchange of the water coolers.

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