RDF hydrogen production system

Abstract

The utility model relates to the technical field of garbage treatment, and discloses an RDF hydrogen production system which comprises a feeding mechanism, a gasification furnace, a catalytic converter, a spray tower, a fan, an electrical tar precipitator, a first flame arrester, an overflow tank and a gas storage bag which are connected in sequence, the output end of the feeding mechanism is connected with the input end of the gasification furnace, and the feeding mechanism is used for conveying solid waste materials to the gasification furnace; the gasification furnace is used for gasifying the solid waste material to generate organic gas, and introducing the organic gas into the catalyst to generate hydrogen and release heat; the output end of the catalytic converter is connected with the input end of the spray tower, and the hydrogen is introduced into the overflow tank through the spray tower, the fan, the electrical tar precipitator and the first flame arrester in sequence; the device has the beneficial effects that the automation degree is high, the RDF can be used as a hydrogen production raw material, the RDF is converted into clean energy, the application scene is expanded, the storage is easy, and the RDF is fully utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of garbage treatment, in particular to an RDF hydrogen production system. Background Art

[0002] By resourcefully treating domestic garbage, the original garbage is deodorized by biological bacteria, dehydrated, screened, and crushed to produce Refuse Derived Fuel (RDF for short). Existing RDF is generally directly used as fuel, with limited application scenarios, and still produces a small amount of harmful gases when burned. Therefore, it cannot be used on a large scale. How to convert it into other clean energy sources, expand its application scenarios, and thus achieve the full utilization of RDF is an urgent problem to be solved. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an RDF hydrogen production system with high automation, which can use RDF as a raw material for hydrogen production, convert RDF into clean energy, expand application scenarios, and is easy to store, thus achieving the full utilization of RDF.

[0004] To achieve the above purpose, the utility model provides an RDF hydrogen production system, which includes a feeding mechanism, a gasifier, a catalytic converter, a spray tower, a fan, an electrostatic tar precipitator, a first flame arrester, an overflow tank, and a gas storage bag connected in sequence;

[0005] The output end of the feeding mechanism is connected to the input end of the gasifier;

[0006] The output end of the gasifier is connected to the input end of the catalytic converter. The gasifier is used to gasify RDF to generate organic gas and introduce the organic gas into the catalytic converter to generate hydrogen;

[0007] The output end of the catalytic converter is connected to the input end of the spray tower. The hydrogen gas passes through the spray tower, the fan, the electrostatic tar precipitator, and the first flame arrester in sequence and then enters the overflow tank;

[0008] Among them, the fan is used to provide power for the flow of hydrogen gas, the spray tower and the electrostatic tar precipitator are used to purify the hydrogen gas, and the overflow tank is used to adjust the hydrogen gas pressure in the overflow tank to a safe threshold and then introduce it into the gas storage bag.

[0009] Furthermore, it also includes a second flame arrester and a hydrogen compressor. The hydrogen gas in the gas storage bag enters the hydrogen compressor through the second flame arrester for compression.

[0010] Furthermore, the top of the overflow tank is provided with a first pipe extending radially outward, and the other end of the first pipe is provided with a flare.

[0011] Furthermore, a spiral feeding mechanism is provided at the top of the gasifier, and the spiral feeding mechanism is located below the output end of the feeding mechanism.

[0012] Furthermore, the feeding mechanism includes a belt feeder and a bucket elevator. The belt feeder is horizontally arranged, the bucket elevator is vertically arranged. The output end of the belt feeder is connected to the feeding hopper of the bucket elevator, and the discharging hopper of the bucket elevator is located above the spiral feeding mechanism.

[0013] Furthermore, a waste heat recovery boiler is further included. The waste heat recovery boiler is located between the catalytic converter and the spray tower. The hydrogen gas is cooled by absorbing heat in the waste heat recovery boiler and then sequentially passes through the spray tower, the fan, the electro-tar precipitator, and the first flame arrester and enters the overflow tank.

[0014] Furthermore, a circulation pipeline is further included. The circulation pipeline includes a purification water tank and a pump body. The output end of the purification water tank is connected to the cooling water input end of the gasifier and the water inlet pipeline of the spray tower. The cooling water output end of the gasifier is connected to the input end of the waste heat recovery boiler. The input end of the purification water tank is connected to the output end of the waste heat recovery boiler.

[0015] Furthermore, the spray tower is provided with a sewage circulation water tank and a circulation pump. The sewage circulation water tank is internally connected to the spray tower. The water outlet of the sewage circulation water tank is connected to the input end of the circulation pump, and the output end of the circulation pump is communicated with the water inlet pipeline of the spray tower.

[0016] Compared with the prior art, the RDF hydrogen production system according to the embodiment of the present invention has the beneficial effects that: through the feeding mechanism, the automatic feeding of RDF into the gasifier is realized. After the RDF is gasified in the gasifier, organic gas is generated. The organic gas is catalyzed by the catalytic converter to generate hydrogen gas. After the hydrogen gas is sequentially purified by the spray tower and the electro-tar precipitator, pure hydrogen gas is formed and stored in the gas storage bag after pressure regulation in the overflow tank. The RDF material is converted into clean energy, the overall automation degree is high, and the generated hydrogen gas is convenient for storage and utilization. It can be used as fuel or for power generation, expanding the application scenarios of the RDF material, and no harmful substances are generated, and the environmental protection performance is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the RDF hydrogen production system according to the embodiment of the present invention.

[0018] In the figure, 1 is the feeding mechanism; 100 is the belt feeder; 101 is the bucket elevator; 2 is the gasifier; 21 is the screw feeding mechanism; 3 is the catalytic converter; 4 is the spray tower; 41 is the sewage circulation water tank; 42 is the circulation pump; 5 is the fan; 6 is the electrostatic tar precipitator; 7 is the first flame arrester; 8 is the overflow tank; 81 is the first pipeline; 82 is the flare; 9 is the gas storage tank; 10 is the second flame arrester; 11 is the hydrogen compressor; 12 is the waste heat recovery boiler; 13 is the circulation pipeline; 131 is the purification water tank; 132 is the pump body. Specific embodiments

[0019] The following will further describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. in the present invention is based on the positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the devices and elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0022] Such as Figure 1As shown in the figure, a kind of RDF hydrogen production system in a preferred embodiment of the present utility model is used for gasifying RDF to generate clean energy hydrogen. It includes a feeding mechanism 1, a gasifier 2, a catalytic converter 3, a spray tower 4, a fan 5, an electric tar precipitator 6, a first flame arrester 7, an overflow tank 8 and a gas storage bag 9 which are connected in sequence. Among them, the feeding mechanism 1 is used to convey RDF into the gasifier 2 for gasification. Specifically, the output end of the feeding mechanism 1 is connected to the input end of the gasifier 2. The gasifier 2 is used to gasify solid RDF and generate organic gases such as methane. The output end of the gasifier 2 is connected to the input end of the catalytic converter 3, and the organic gas is introduced into the catalytic converter 3 to generate hydrogen. A catalyst is added in the catalytic converter 3 for the chemical reaction of the organic gas to produce hydrogen. The output end of the catalytic converter 3 is connected to the input end of the spray tower 4, and hydrogen passes through the spray tower 4, the fan 5, the electric tar precipitator 6 and the first flame arrester 7 in sequence and then enters the overflow tank 8. Among them, the fan 5 is used to provide power for the flow of hydrogen, and the spray tower 4 and the electric tar precipitator 6 are used to purify hydrogen. Specifically, the spray tower 4 is mainly used for preliminary dust removal and removing some harmful substances soluble in water. The electric tar precipitator 6 is mainly used for further dust removal, removing tar and sulfur dioxide and other substances to obtain pure hydrogen. The overflow tank 8 is used for temporarily storing hydrogen and adjusting the hydrogen storage pressure. After adjusting the hydrogen pressure in the overflow tank 8 to the safety threshold, it is introduced into the gas storage bag 9 for storage. The first flame arrester 7 is used to ensure the safety of the system and is used for extinguishing fires.

[0023] Furthermore, in order to transfer or utilize the hydrogen in the gas storage bag 9, it also includes a second flame arrester 10 and a hydrogen compressor 11. The hydrogen in the gas storage bag 9 enters the hydrogen compressor 11 through the second flame arrester 10 for compression. The hydrogen compressor 11 can be externally connected to a gas station or a hydrogen tank to store hydrogen, and the hydrogen can be used as fuel gas or for power generation. Even further, in order to ensure the stable hydrogen pressure in the overflow tank 8 and avoid excessive internal pressure in the overflow tank 8, a first pipeline 81 extending radially outward is provided at the top of the overflow tank 8, and the other end of the first pipeline 81 is provided with a flare 82 which can be automatically ignited for hydrogen dispersion.

[0024] Furthermore, in order to make the feeding in the gasifier 2 uniform and avoid the accumulation of materials at the feeding port of the gasifier 2, a spiral feeding mechanism 21 is provided at the top of the gasifier 2, and the spiral feeding mechanism 21 is located below the output end of the feeding mechanism 1. Even further, in order to facilitate the simplification of the feeding mechanism 1, in this embodiment, refer to Figure 1 , the feeding mechanism 1 includes a belt feeder 100 and a bucket elevator 101. Specifically, the belt feeder 100 is horizontally arranged, the bucket elevator 101 is vertically arranged, the output end of the belt feeder 100 is connected to the feeding hopper of the bucket elevator 101, and the discharging hopper of the bucket elevator is located above the spiral feeding mechanism 21. In the actual feeding process, the belt feeder 100 is arranged close to the RDF stacking area for convenient feeding.

[0025] Furthermore, since the temperature of the organic gas flowing out of the gasifier 2 is relatively high, and it still has a relatively high temperature after reacting in the catalytic converter 3 to generate hydrogen and impurity gases, in order to facilitate the recovery and utilization of the heat in the gas, a waste heat recovery boiler 12 is further included in the hydrogen production system of the present utility model. Specifically, referring to Figure 1 , the waste heat recovery boiler is located between the catalytic converter 3 and the spray tower 4. After the hydrogen absorbs heat and cools down in the waste heat recovery boiler 12, it successively passes through the spray tower 4, the fan 5, the electric tar precipitator 6, and the first flame arrester 7 and then enters the overflow tank 8.

[0026] Even further, in order to facilitate the recycling of water in the RDF hydrogen production system and reduce the waste of water during hydrogen production, a circulation pipeline 13 is further included in the RDF hydrogen production system of the present utility model. Specifically, referring to Figure 1 , the circulation pipeline 13 includes a purification water tank 131 and a pump body 132. Among them, the output end of the purification water tank 131 is connected to the cooling water input end of the gasifier 2 and the water inlet pipeline of the spray tower 4. The cooling water output end of the gasifier 2 is connected to the input end of the waste heat recovery boiler. The input end of the purification water tank 131 is connected to the output end of the waste heat recovery boiler 12, thereby forming an internal water circulation in the hydrogen production system. The purification water tank 131 can filter and purify the water in the internal water circulation. The purification water tank 131 is a standard part and can be directly purchased, so its specific structure will not be elaborated. Specifically, in order to form a circulating water path inside the spray tower 4 and reduce the water consumption during hydrogen spraying, the spray tower 4 is provided with a sewage circulation water tank 41 and a circulation pump 42. The sewage circulation water tank 41 is internally connected to the spray tower 4. The water outlet of the sewage circulation water tank 41 is connected to the input end of the circulation pump 42. The output end of the circulation pump 42 is communicated with the water inlet pipeline of the spray tower 4, and a water circulation is formed inside the spray tower 4.

[0027] The working process of the present utility model is as follows: The RDF is transported to the gasifier 2 through the feeding mechanism 1. The RDF is gasified in the gasifier 2 to generate organic gas. The organic gas is catalyzed by the catalyst in the catalytic converter 3 to generate hydrogen. The hydrogen finally enters the gas storage bag 9 after passing through the spray tower 4 and the electric tar precipitator 6. According to the hydrogen usage demand, a hydrogen compressor 11 can be added to compress the hydrogen and then transport it in cans.

[0028] In summary, compared with the prior art, the RDF hydrogen production system provided by the embodiment of the present utility model has the following beneficial effects: Through the feeding mechanism 1, the RDF is automatically fed into the gasifier 2. After the RDF is gasified in the gasifier 2, organic gas is generated. The organic gas is catalyzed by the catalytic converter 3 to generate hydrogen. After the hydrogen is purified by the spray tower 4 and the electric tar precipitator 6 in sequence, pure hydrogen is formed. After the pressure is regulated in the overflow tank 8, it is stored in the gas storage bag 9. The RDF material is converted into clean energy, with a high degree of overall automation. The generated hydrogen is convenient for storage and utilization, can be used as fuel or for power generation, expanding the application scenarios of the RDF material, and no harmful substances are produced, with good environmental protection performance.

[0029] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and substitutions can still be made, and these improvements and substitutions should also be regarded as the protection scope of the present utility model.

Claims

1. An RDF hydrogen production system, characterized in that: It includes a feeding mechanism, a gasifier, a catalytic converter, a spray tower, a fan, an electric tar precipitator, a first flame arrester, an overflow tank and a gas storage tank, which are connected in sequence; The output end of the feeding mechanism is connected to the input end of the gasifier; The output end of the gasifier is connected to the input end of the catalytic converter. The gasifier is used for gasifying RDF to generate organic gas and introducing the organic gas into the catalytic converter to generate hydrogen; The output end of the catalytic converter is connected to the input end of the spray tower. The hydrogen passes through the spray tower, the fan, the electric tar precipitator and the first flame arrester in sequence and then enters the overflow tank; Among them, the fan is used to provide power for the flow of hydrogen. The spray tower and the electric tar precipitator are used to purify the hydrogen. The overflow tank is used to adjust the hydrogen pressure in the overflow tank to a safe threshold and then introduce it into the gas storage tank.

2. The RDF hydrogen production system according to claim 1, wherein: It also includes a second flame arrester and a hydrogen compressor. The hydrogen in the gas storage tank enters the hydrogen compressor through the second flame arrester for compression.

3. The RDF hydrogen production system according to claim 1, wherein: The top of the overflow tank is provided with a first pipe extending radially outward, and the other end of the first pipe is provided with a flare.

4. The RDF hydrogen production system according to claim 1, wherein: The top of the gasifier is provided with a spiral feeding mechanism, and the spiral feeding mechanism is located below the output end of the feeding mechanism.

5. The RDF hydrogen production system according to claim 4, wherein: The feeding mechanism includes a belt feeder and a bucket elevator. The belt feeder is horizontally arranged, and the bucket elevator is vertically arranged. The output end of the belt feeder is connected to the feed hopper of the bucket elevator, and the discharge hopper of the bucket elevator is located above the spiral feeding mechanism.

6. The RDF hydrogen production system according to claim 1, characterized in that: It also includes a waste heat recovery boiler, which is located between the catalytic converter and the spray tower. The hydrogen absorbs heat and cools down through the waste heat recovery boiler and then passes through the spray tower, the fan, the electric tar precipitator and the first flame arrester in sequence and enters the overflow tank.

7. The RDF hydrogen production system according to claim 6, characterized in that: It also includes a circulation pipeline, which includes a purification water tank and a pump body. The output end of the purification water tank is connected to the cooling water input pipeline of the gasifier and the water inlet pipeline of the spray tower. The cooling water output pipeline of the gasifier is connected to the input end of the waste heat recovery boiler. The input end of the purification water tank is connected to the output end of the waste heat recovery boiler.

8. The RDF hydrogen production system according to claim 1, characterized in that: The spray tower is provided with a sewage circulation water tank and a circulation pump. The sewage circulation water tank is internally connected to the spray tower. The water outlet of the sewage circulation water tank is connected to the input end of the circulation pump, and the output end of the circulation pump is communicated with the water inlet pipeline of the spray tower.

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