Coal-electricity hydrogen doping gasification device and method

Abstract

The invention relates to a coal-electricity hydrogen doping gasification device and method. The coal-electricity hydrogen doping gasification device comprises a gasification furnace, the top of the gasification furnace is fixedly connected with a top shell, the top of the gasification furnace is fixedly connected with a top shell, and the top of the top shell is fixedly connected with a mounting table. The first reaction bin and the second reaction bin are arranged, and the reactant inlet is connected into the second reaction bin, so that the reaction device has the effect of carrying out secondary reaction, and the effect of further reacting semicoke subjected to primary reaction in the first reaction bin can be ensured; it is guaranteed that the pulverized coal can be utilized more sufficiently, and meanwhile energy loss of hydrogasification is reduced. By arranging the wind wheel and the stirring blades, pulverized coal in the first reaction bin can be effectively in more sufficient contact with hydrogen in the primary reaction process, the reaction effect is better, the semi-coke after primary reaction can be effectively transmitted, and use is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of coal gasification production, and specifically relates to a coal-electricity hydrogen-blended gasification device and method. Background Art

[0002] China is rich in coal resources, and nearly 80% of the coal is low-rank coal. The direct use of these low-rank coals will cause serious environmental pollution. In order to improve the utilization value of coal and reduce environmental pollution at the same time, coal gasification technology can be used to convert coal into coal gas and tar, and then utilize the coal gas and tar.

[0003] In the process of gasifying coal, hydrogen gasification is usually adopted to react coal with high-temperature hydrogen gas at a certain temperature and pressure to generate methane, aromatic hydrocarbon oil products and clean semi-coke. This reaction is usually completed in a gas generator.

[0004] During the use of the existing gas generator, the mixing speed of hydrogen gas and pulverized coal is slow, and the reaction between hydrogen gas and pulverized coal is not sufficient, which results in a low content of light oil products and a large amount of semi-coke produced. And the semi-coke produced cannot be subjected to a secondary reaction. It is necessary to collect and cool it and then re-inject it into the gasification furnace for re-gasification reaction to generate raw coal gas, so as to achieve efficient utilization of semi-coke. This method not only has complex processes but also increases energy consumption. Therefore, a coal-electricity hydrogen-blended gasification device and method are proposed to solve the above problems. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a coal-electricity hydrogen-blended gasification device and method, which have the advantages of being able to perform a secondary reaction on the semi-coke generated after the primary reaction and being able to make the primary reaction effect better, and solve the problems of poor reaction effect during the use of the traditional gas generator and energy waste caused by the secondary treatment of semi-coke.

[0006] To achieve the above object, the present invention provides the following technical solution: A coal-electricity hydrogen-blended gasification device includes a gasification furnace. The top of the gasification furnace is fixedly connected with a top shell. The top of the gasification furnace is fixedly connected with a top shell. The top of the top shell is fixedly connected with an installation platform, and a pulverized coal spray head is arranged on the installation platform;

[0007] A connection seat is arranged in the gasification furnace. The top of the connection seat is fixedly connected with a first reaction chamber. Four connection holes are opened on the connection seat, and a hopper is fixedly connected inside the connection seat;

[0008] Hydrogen spray heads, recovery pipes, cleaning spray heads and oxygen spray heads are respectively arranged in the connection holes. The bottom of the hopper is fixedly connected with a second reaction assembly, and a transmission assembly is arranged inside the second reaction assembly.

[0009] Further, an installation bin is provided on the second reaction component, and a connecting plate is fixedly connected to the top of the installation bin, and the connecting plate is fixedly connected to the connecting seat.

[0010] Further, a second reaction bin is fixedly connected inside the installation bin, and the top of the second reaction bin is fixedly connected to the bottom of the hopper.

[0011] Further, a connecting platform is provided on the installation bin, and a reactant inlet is fixedly connected to one end of the connecting platform, and the reactant inlet is fixedly connected to the gasifier.

[0012] Further, a sieve plate is provided inside the second reaction bin.

[0013] Further, a transmission rod is provided on the transmission component, and the transmission rod is rotatably connected to the sieve plate.

[0014] Further, a stirring blade is fixedly connected to the top of the transmission rod, and a wind wheel is fixedly connected to the rod body part of the transmission rod, and the wind wheel is at the same horizontal height as the hydrogen spray head.

[0015] Further, an auger blade is fixedly connected to the lower end of the transmission rod, and the auger blade is located inside the second reaction bin.

[0016] Further, a recovery port is fixedly connected to the bottom of the gasifier, and a recovery bin is fixedly connected to the bottom of the recovery port.

[0017] On this basis, the present invention also provides an implementation of a coal-electricity hydrogen-blended gasification device, which includes the following steps:

[0018] S1: Spray the pulverized coal required for the reaction into the first reaction bin by using a pulverized coal spray head, and at the same time introduce hydrogen and oxygen into it through the hydrogen spray head and the oxygen spray head, so that the hydrogen and the oxygen at least undergo a coal hydrothermal decomposition reaction in the first reaction zone.

[0019] S2: Continuously introduce hydrogen and oxygen into the first reaction bin through the hydrogen spray head and the oxygen spray head at the same time, so that the wind wheel and the stirring blade rotate, thereby stirring and dispersing the pulverized coal sprayed by the pulverized coal spray head so that it can fully react with the introduced hydrogen, and completing the coal hydrothermal decomposition reaction.

[0020] S3: Control the hydrogen spray head and the oxygen spray head to stop introducing hydrogen and oxygen into the first reaction bin, open the recovery pipe to collect the gas that has completed the reaction in the first reaction bin, then open the cleaning spray head to clean the residual gas inside it, and at the same time, under the action of the auger blade, the unreacted semicoke will be transferred into the second reaction bin, and at this time, a reactant can be introduced into it through the reactant inlet to cause a secondary reaction.

[0021] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0022] 1. The coal-fired power and hydrogen-blended gasification device and method are provided with a first reaction chamber and a second reaction chamber, and a reactant inlet is connected in the second reaction chamber, so that it has the effect of being able to carry out a secondary reaction, ensuring that it can further react with the semicoke after the primary reaction in the first reaction chamber, ensuring that the utilization of pulverized coal is more sufficient, and at the same time reducing the energy loss of hydrogen gasification.

[0023] 2. The coal-fired power and hydrogen-blended gasification device and method are provided with a wind wheel and stirring blades, so that during the primary reaction, the pulverized coal in the first reaction chamber can be effectively made to contact hydrogen more fully and the reaction effect is better. By setting it, it can effectively play a transmission effect on the semicoke after the primary reaction, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0025] Figure 2 It is a schematic diagram of a partial structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the present invention;

[0027] Figure 4 It is a schematic diagram of a partial structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the second reaction component of the present invention;

[0029] Figure 6 It is a schematic diagram of the internal structure of the second reaction component of the present invention;

[0030] Figure 7 It is a schematic diagram of the structure of the transmission component of the present invention.

[0031] In the figure: 1. Gasifier; 101. Top shell; 102. Installation table; 103. Pulverized coal spray head; 104. Connection seat; 105. Connection hole; 106. First reaction chamber; 107. Hopper; 108. Hydrogen spray head; 109. Recovery pipe; 111. Cleaning spray head; 112. Oxygen spray head; 113. Recovery bin; 114. Recovery port; 2. Second reaction component; 21. Installation bin; 22. Connection plate; 23. Second reaction chamber; 24. Connection table; 25. Reactant inlet; 26. Sieve plate; 3. Transmission component; 31. Transmission rod; 32. Stirring blade; 33. Wind wheel; 34. Auger blade. DETAILED DESCRIPTION OF THE INVENTION

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment 1:

[0034] Please refer to Figures 1-6 , a coal-electricity hydrogen-blended gasification device in this embodiment includes a gasification furnace 1. A top shell 101 is fixedly connected to the top of the gasification furnace 1. A mounting table 102 is fixedly connected to the top of the top shell 101. In order to facilitate the injection of pulverized coal into the gasification furnace 1 during use, a pulverized coal nozzle 103 is provided on the mounting table 102 in this embodiment;

[0035] In order to make the pulverized coal react more fully during the primary reaction, a connecting seat 104 is provided in the gasification furnace 1 in this embodiment. A first reaction chamber 106 is fixedly connected to the top of the connecting seat 104. Four connecting holes 105 are opened on the connecting seat 104. A hopper 107 is fixedly connected inside the connecting seat 104; by providing the hopper 107, it can effectively play a good guiding effect on the semicoke generated after the primary reaction, and can converge the semicoke on the top of the second reaction assembly 2 for subsequent reaction. Hydrogen nozzles 108, recovery pipes 109, cleaning nozzles 111 and oxygen nozzles 112 are respectively arranged in the connecting holes 105. The bottom of the hopper 107 is fixedly connected to a second reaction assembly 2. A transmission assembly 3 is arranged inside the second reaction assembly 2. By providing the hydrogen nozzles 108 and the oxygen nozzles 112, the hydrogen and oxygen required for the primary reaction can be provided. By providing the recovery pipes 109 and the cleaning nozzles 111, it is convenient for the staff to collect the reacted methane gas and can collect the residual gas inside through the cleaning nozzles 111 after the collection is completed.

[0036] During actual use, the staff can introduce hydrogen and oxygen into the first reaction chamber 106 through the hydrogen nozzles 108 and the oxygen nozzles 112 so that they can react with the pulverized coal ejected from the pulverized coal nozzle 103 to realize the production of methane gas. And under the action of the transmission assembly 3, an effective full mixing effect of hydrogen and pulverized coal can be realized, ensuring that more methane gas and light oil products are generated during the primary production process.

[0037] In order to achieve the effect of secondary production of the semi-coke produced by the primary reaction, the second reaction component 2 in this embodiment is provided with an installation bin 21, and a connecting plate 22 is fixedly connected to the top of the installation bin 21, and the connecting plate 22 is fixedly connected to the connecting seat 104. By fixing the connecting plate 22 to the connecting seat 104, its firmness during use is guaranteed. A second reaction bin 23 is fixedly connected in the installation bin 21, and the top of the second reaction bin 23 is fixedly connected to the bottom of the hopper 107. This connection method can make the coal powder after the primary reaction effectively gather at the mouth of the second reaction bin 23, which is convenient for the effect of secondary production. A connecting platform 24 is provided on the installation bin 21, and one end of the connecting platform 24 is fixedly connected to a reactant inlet 25, and the connecting platform 24 is fixedly connected to the gasifier 1. By providing the connecting platform 24, when the staff introduces the semi-coke produced after the preliminary reaction into the second reaction bin 23 through the transmission component 3, the reactant can be introduced into the inside through the connecting platform 24 to achieve the effect of secondary treatment of the semi-coke.

[0038] Preferably, in this embodiment, the reactant inlet 25 gasifying agent can be raw coal gas, which contains a large amount of hydrogen, which is beneficial to the secondary hydrogenation gasification reaction of the semi-coke. The gas finally produced by using this gasifying agent is mainly carbon monoxide, hydrogen and methane.

[0039] Further, a sieve plate 26 is provided in the second reaction chamber 23. On the one hand, it can play a connecting effect with the transmission rod 31, and on the other hand, it can ensure that the semi-coke after the secondary reaction can be discharged. It is worth noting that there are two sieve plates 26 and they can rotate. When they rotate to each other until their sieve holes are staggered, they are in a closed state, and when their sieve holes overlap, they are in an open state. In the actual use process, the staff can set a corresponding transmission device on one of the sieve plates 26 to ensure that it can achieve the effect of automatic rotation.

[0040] Embodiment 2:

[0041] See also Figure 7, in order to convey the semicoke and make the primary hydrogenation reaction more complete, a transmission rod 31 is provided on the transmission assembly 3 in this embodiment. The transmission rod 31 is rotatably connected to the sieve plate 26. By providing the transmission rod 31, it can achieve a good transmission effect. On the one hand, it can ensure that it can drive the stirring blade 32 to make the pulverized coal in the first reaction chamber 106 contact with hydrogen more fully. On the other hand, it can drive the auger blade 34 connected to its lower end to achieve a good conveying effect on the semicoke generated after the primary reaction. A stirring blade 32 is fixedly connected to the top of the transmission rod 31, and a wind wheel 33 is fixedly connected to the rod body part of the transmission rod 31. The wind wheel 33 is at the same horizontal height as the hydrogen nozzle 108. An auger blade 34 is fixedly connected to the lower end of the transmission rod 31, and the auger blade 34 is located in the second reaction chamber 23.

[0042] During the actual use process, when the staff adds oxygen and hydrogen into the first reaction chamber 106 through the hydrogen nozzle 108 and the oxygen nozzle 112, the wind wheel 33 will be driven to rotate under the action of the air flow. During the rotation of the wind wheel 33, it can drive the transmission rod 31 to rotate, so that the stirring blade 32 connected to the top of the transmission rod 31 can stir and disperse the pulverized coal ejected from the pulverized coal nozzle 103, so that it can contact the hydrogen ejected from the hydrogen nozzle 108 more fully. It should be noted that at this time, the auger blade 34 at the lower end of the transmission rod 31 rotates in reverse so that the semicoke after the primary reaction can be converged at the mouth of the second reaction chamber 23. After the primary reaction is completed, at this time, the staff can control the hydrogen nozzle 108 and the oxygen nozzle 112 to close, and then can open the recovery pipe 109 to collect the methane gas generated by the reaction inside. When the collection is completed, at this time, the staff can pass a cleaning gas into the first reaction chamber 106 through the cleaning nozzle 111 to clean the inside of the first reaction chamber 106. At this time, under the action of the air flow, the wind wheel 33 can drive the transmission rod 31 to make the auger blade 34 rotate forward, so as to ensure that the auger blade 34 can convey the semicoke after the primary reaction into the second reaction chamber 23 to achieve the effect of the secondary reaction in the second reaction chamber 23.

[0043] In order to collect the residues after the secondary reaction, a recovery port 114 is fixedly connected to the bottom of the gasifier 1 in this embodiment, and a recovery bin 113 is fixedly connected to the bottom of the recovery port 114. This connection method enables the staff to control the sieve plate 26 to drop it into the recovery port 114 for collection when the semicoke in the second reaction chamber 23 has completed the secondary reaction.

[0044] On this basis, the present invention also provides a gasification method using a coal-electricity co-hydrogen gasification device, which includes the following steps:

[0045] S1: Inject the pulverized coal required for the reaction into the first reaction chamber 106 using the pulverized coal nozzle 103. At the same time, introduce hydrogen and oxygen into it through the hydrogen nozzle 108 and the oxygen nozzle 112, so that the hydrogen and oxygen at least undergo coal hydrothermal decomposition reaction in the first reaction zone.

[0046] S2: Continuously introduce hydrogen and oxygen into the first reaction chamber 106 through the hydrogen nozzle 108 and the oxygen nozzle 112. When the staff adds oxygen and hydrogen into the first reaction chamber 106 through the hydrogen nozzle 108 and the oxygen nozzle 112, the airflow will drive the wind wheel 33 to rotate. During the rotation of the wind wheel 33, it can drive the transmission rod 31 to rotate, so that the stirring blade 32 connected to the top of the transmission rod 31 can stir and disperse the pulverized coal ejected by the pulverized coal nozzle 103, so that it can contact the hydrogen ejected from the hydrogen nozzle 108 more fully. At this time, the auger blade 34 at the lower end of the transmission rod 31 rotates in reverse, so that the semi-coke after the first reaction can be converged at the mouth of the second reaction chamber 23, facilitating its secondary reaction.

[0047] S3: Control the hydrogen nozzle 108 and the oxygen nozzle 112 to stop introducing hydrogen and oxygen into the first reaction chamber 106. Then, the recovery pipe 109 can be opened to collect the methane gas generated by the reaction inside. After the collection is completed, the staff can introduce a cleaning gas into the first reaction chamber 106 through the cleaning nozzle 111 to clean the inside of the first reaction chamber 106. At this time, under the action of the airflow, the wind wheel 33 can drive the transmission rod 31 to make the auger blade 34 rotate forward, so as to ensure that the auger blade 34 can convey the semi-coke after the first reaction to the second reaction chamber 23. Then, the staff can introduce a reactant into the second reaction chamber 23 through the reactant inlet 25, so as to achieve the effect of the secondary reaction. After the reaction is completed, the staff can control the sieve plate 26 to make the residue after the secondary reaction fall into the recovery port 114 to achieve the collection effect.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal-to-electricity hydrogenation gasification device, comprising a gasifier (1), characterized in that: The top of the gasifier (1) is fixedly connected to a top shell (101), the top of the gasifier (1) is fixedly connected to a top shell (101), the top of the top shell (101) is fixedly connected to a mounting platform (102), and a pulverized coal nozzle (103) is arranged on the mounting platform (102); The gasifier (1) is provided with a connection seat (104), the top of the connection seat (104) is fixedly connected to a first reaction chamber (106), the connection seat (104) is provided with four connection holes (105), and the connection seat (104) is fixedly connected to a hopper (107); A hydrogen nozzle (108), a recovery pipe (109), a cleaning nozzle (111) and an oxygen nozzle (112) are arranged in the connection hole (105); a second reaction component (2) is fixedly connected to the bottom of the hopper (107); and a transmission component (3) is arranged inside the second reaction component (2).

2. A coal-to-electricity hydrogenation gasification device according to claim 1, characterized in that: The second reaction assembly (2) is provided with an installation chamber (21), the top of the installation chamber (21) is fixedly connected with a connecting plate (22), and the connecting plate (22) is fixedly connected to the connecting seat (104).

3. A coal-to-electricity hydrogenation gasification device according to claim 2, characterized in that: A second reaction bin (23) is fixedly connected inside the installation bin (21), and the top of the second reaction bin (23) is fixedly connected to the bottom of the hopper (107).

4. A coal-to-electricity hydrogenation gasification device according to claim 3, characterized in that: A connecting platform (24) is provided on the installation bin (21), one end of the connecting platform (24) is fixedly connected to a reactant inlet (25), and the reactant inlet (25) is fixedly connected to the gasifier (1).

5. A coal-to-electricity hydrogenation gasification device according to claim 4, characterized in that: A sieve plate (26) is provided in the second reaction chamber (23).

6. The coal-to-electricity hydrogenation gasification device according to claim 1, characterized in that: The transmission assembly (3) is provided with a transmission rod (31), and the transmission rod (31) is rotatably connected to the screen plate (26).

7. A coal-to-electricity hydrogenation gasification device according to claim 6, characterized in that: The top of the transmission rod (31) is fixedly connected with a stirring blade (32), the rod body of the transmission rod (31) is fixedly connected with a wind wheel (33), and the wind wheel (33) is at the same level as the hydrogen spray head (108).

8. The coal-to-electricity hydrogenation gasification device according to claim 6, characterized in that: The lower end of the transmission rod (31) is fixedly connected to an auger blade (34), and the auger blade (34) is located in the second reaction chamber (23).

9. The coal-to-electricity hydrogenation gasification device according to claim 1, characterized in that: The bottom of the gasifier (1) is fixedly connected to a recovery port (114), and the bottom of the recovery port (114) is fixedly connected to a recovery bin (113).

10. A gasification method using a coal-fired power generation hydrogenation gasification device, implemented using a coal-fired power generation hydrogenation gasification device as described in any one of 1 to 9 above, characterized in that: It contains the following steps: S1: using a coal powder nozzle (103) to spray the coal powder required for the reaction into a first reaction chamber (106), and at the same time, introducing hydrogen and oxygen into the first reaction chamber through a hydrogen nozzle (108) and an oxygen nozzle (112) so that the hydrogen and the oxygen at least undergo a coal hydrogenation thermal decomposition reaction in the first reaction zone; S2: continuously introducing hydrogen and oxygen into the first reaction chamber (106) through the hydrogen nozzle (108) and the oxygen nozzle (112) at the same time, so that the wind wheel (33) and the stirring blade (32) rotate, thereby stirring and breaking up the coal powder sprayed by the coal powder nozzle (103) so that it can fully react with the introduced hydrogen, thereby completing the coal hydrogenation thermal decomposition reaction; S3: Control the hydrogen nozzle (108) and the oxygen nozzle (112) to stop introducing hydrogen and oxygen into the first reaction chamber (106), open the recovery pipe (109) to collect the gas after the reaction in the first reaction chamber (106), and then open the cleaning nozzle (111) to clean the residual gas inside. At the same time, under the action of the auger blade (34), the unreacted semi-coke will be transferred to the second reaction chamber (23), and the reactant can be introduced into the reactant through the reactant inlet (25) to cause a secondary reaction.

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