Reaction device for improving quality of low-rank coal pyrolysis product
The reaction apparatus addresses the limitations of existing low-grade coal processing by efficiently separating and reacting catalysts, lightening coal tar, and recovering gases, thereby enhancing product quality and resource utilization.
Patent Information
- Application Number
- CN202421929182.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The existing low-order coal lightweight equipment using tar gas cannot be coking simultaneously, and the quartz wool is insufficient in the reaction, so it cannot be used for a long time, so it cannot effectively utilize coalbed methane.
A device including a reactor and a condenser is designed to carry out catalytic reactions using Ni/Al2O3 and Ni/AC catalysts, separate the catalyst and low-order coal through a partition, and recover excess gas through a gas reflux tube to achieve efficient separation and lightweight treatment of low-order coal.
The efficient separation reaction between catalyst and low-order coal is achieved, the quality of low-order coal products is improved, and gas resources are recycled and utilized, which is improved resource utilization.
Smart Images
Figure CN223102941U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of energy chemical engineering, and particularly relates to a reaction device for improving the quality of pyrolysis products of low-rank coal. Background Art
[0002] Low-rank coal refers to coal with low degree of coalification and high pulverization degree. Low-rank coal and methane can be coked by viscosity increase under the action of a catalyst. Coal tar is a black or dark brown viscous liquid with a pungent odor generated during the carbonization of coal. Coal tar is in a gaseous state at high temperatures. Tar gas and CH4 / CO2 undergo a cracking reaction under the action of a catalyst to lighten the tar.
[0003] However, the existing equipment for lightening tar gas from low-rank coal has the following deficiencies: the existing device can only process the lightening of heavy oil, cannot coke simultaneously, and does not utilize coalbed methane; the quartz wool in the tar lightening device has low mechanical strength in the reaction, is relatively fragile, and is easy to break, and cannot be used in the reactor for a long time. Content of the Utility Model
[0004] In view of the above problems, the utility model provides a reaction device for improving the quality of pyrolysis products of low-rank coal, which not only realizes the efficient separation and reaction of the catalyst and low-rank coal, effectively utilizes the huge output of low-rank coal, simultaneously lightens the coal tar generated after the reaction, but also recovers and utilizes the excess gas products, saving resources.
[0005] To achieve the above object, the technical solution of the utility model is: a reaction device for improving the quality of pyrolysis products of low-rank coal, including a reactor and a condenser. The condenser includes an air condenser, a water condenser and an ethylene glycol condenser. An air inlet is provided at the top of the reactor. The bottom of the reactor is communicated with the top of the air condenser through a pipeline. The bottom of the air condenser is communicated with the top of the water condenser through a pipeline. The bottom of the water condenser is communicated with the top of the ethylene glycol condenser through a pipeline. An oil outlet is provided at the bottom of the ethylene glycol condenser. A gas reflux pipe is provided at the top of the ethylene glycol condenser, and the other end of the gas reflux pipe is communicated with the top of the reactor. Three layers of partitions are arranged at intervals in the radial direction inside the reactor, and a plurality of through holes are opened on the partitions.
[0006] As a further scheme of the utility model: the partition is detachably connected to the inner side of the reactor, and the installation height of the partition and the distance between the partitions can be adjusted.
[0007] As a further scheme of the utility model: the partitions are respectively a first partition, a second partition and a third partition from top to bottom. A catalyst A is placed on the first partition, low-rank coal is placed on the second partition, and a catalyst B is placed on the third partition.
[0008] As a further solution of the present utility model: the A catalyst is a Ni / Al2O3 catalyst, and the B catalyst is a Ni / AC catalyst.
[0009] As a further solution of the present utility model: the particle sizes of the A catalyst, the B catalyst and the low-rank coal are 0 - 6 mm.
[0010] As a further solution of the present utility model: the aperture of the through hole is 3 mm.
[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0012] 1. The present utility model realizes the efficient separation and reaction of the catalyst and the low-rank coal through the partition board, effectively utilizes the low-rank coal with a huge output, and at the same time completes the light-weight treatment of the products after the reaction.
[0013] 2. Through the setting of the gas return pipe, the present utility model recycles the excess gas products, saving resources. Description of the Drawings
[0014] Figure 1 is a schematic diagram of the overall process structure of the present utility model;
[0015] Figure 2 is a schematic diagram of the internal partition board of the reactor of the present utility model;
[0016] Figure 3 is a schematic diagram of the surface structure of the partition board of the present utility model;
[0017] In the figure: 1. Reactor; 2. Air condenser; 3. Water condenser; 4. Ethylene glycol condenser; 5. Air inlet; 6. Pipeline; 7. Oil outlet; 8. Gas return pipe; 9. Partition board; 91. First partition board; 92. Second partition board; 93. Third partition board; 10. Through hole; 11. A catalyst; 12. Low-rank coal; 13. B catalyst. Detailed Embodiments
[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0019] Reference Figures 1 to 3, A reaction device for improving the quality of low-rank coal pyrolysis products, including a reactor 1 and a condenser. The condenser includes an air condenser 2, a water condenser 3, and an ethylene glycol condenser 4. The top of the reactor 1 is provided with an air inlet 5. The bottom of the reactor 1 is connected to the top of the air condenser 2 through a pipeline 6. The bottom of the air condenser 2 is connected to the top of the water condenser 3 through a pipeline 6. The bottom of the water condenser 3 is connected to the top of the ethylene glycol condenser 4 through a pipeline 6. The bottom of the ethylene glycol condenser 4 is provided with an oil outlet 7. The top of the ethylene glycol condenser 4 is provided with a gas return pipe 8. The other end of the gas return pipe 8 is connected to the top of the reactor 1. Three layers of partitions 9 are radially spaced inside the reactor 1, and a number of through holes 10 are opened on the partitions 9.
[0020] The partition 9 is detachably connected to the inner side of the reactor 1, and the installation height of the partition 9 and the distance between the partitions 9 can be adjusted.
[0021] The partitions 9 are the first partition 91, the second partition 92, and the third partition 93 from top to bottom. An A catalyst 11 is placed on the first partition 91, low-rank coal 12 is placed on the second partition 92, and a B catalyst 13 is placed on the third partition 93.
[0022] The A catalyst 11 is a Ni / Al2O3 catalyst, and the B catalyst 13 is a Ni / AC catalyst.
[0023] The particle sizes of the A catalyst 11, the B catalyst 13, and the low-rank coal 12 are 0 - 6 mm.
[0024] The aperture of the through hole 10 is 3 mm.
[0025] Working process: Install the third partition 93 inside the reactor 1, place the Ni / AC catalyst on the third partition 93, then place the second partition 92 above the Ni / AC catalyst, place the low-rank coal 12 on the second partition 92, place the first partition 91 above the low-rank coal 12, place the Ni / Al2O3 catalyst on the first partition 91, and fill CH4 / CO2 into the reactor 1 through the air inlet 5 of the reactor 1. The Ni / Al2O3 catalyst activates CH4 to generate H free radicals, the viscosity of the low-rank coal increases, and gaseous coal tar is generated. The gaseous coal tar passes through the Ni / AC catalyst on the third partition 93 to play a role in lightening. Finally, it passes through the air condenser 2 and the water condenser 3 in sequence from the lower end of the reactor 1 and enters the ethylene glycol condenser 4. The low-rank coal 12 pyrolyzes to produce more methane, and the methane gas is cooled and then refluxed to the reactor 1 through the gas return pipe 8. The lightening process in the lower layer can realize the lightening of most of the heavy coal tar, and the content of light coal tar in the generated coal tar is increased from 52.8 wt.% to 96.5 wt.%.
[0026] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.
Claims
1. A reaction device for improving the quality of low-rank coal pyrolysis products, comprising a reactor (1) and a condenser. The condenser includes an air condenser (2), a water condenser (3), and an ethylene glycol condenser (4). The top of the reactor (1) is provided with an air inlet (5). The bottom of the reactor (1) is communicated with the top of the air condenser (2) through a pipeline (6). The bottom of the air condenser (2) is communicated with the top of the water condenser (3) through a pipeline (6). The bottom of the water condenser (3) is communicated with the top of the ethylene glycol condenser (4) through a pipeline (6). The bottom of the ethylene glycol condenser (4) is provided with an oil outlet (7), and it is characterized in that: A gas reflux pipe (8) is provided at the top of the ethylene glycol condenser (4), and the other end of the gas reflux pipe (8) is communicated with the top of the reactor (1). Three layers of partition plates (9) are arranged at intervals in the radial direction in the reactor (1), and a plurality of through holes (10) are formed in the partition plates (9).
2. The reaction device for improving the quality of low-rank coal pyrolysis products according to claim 1, characterized in that: The partition plate (9) is detachably connected to the inner side of the reactor (1), and the installation height of the partition plate (9) and the distance between the partition plates (9) can be adjusted.
3. The reaction device for improving the quality of low-rank coal pyrolysis products according to claim 2, wherein: The partition plates (9) are respectively a first partition plate (91), a second partition plate (92) and a third partition plate (93) from top to bottom. A catalyst A (11) is placed on the first partition plate (91), low-rank coal (12) is placed on the second partition plate (92), and a catalyst B (13) is placed on the third partition plate (93).
4. The reaction device for improving the quality of low-rank coal pyrolysis products according to claim 3, characterized in that: The catalyst A (11) is a Ni / Al2O3 catalyst, and the catalyst B (13) is a Ni / AC catalyst.
5. The reaction device for improving the quality of pyrolysis products of low-rank coal according to claim 4, characterized in that: The particle sizes of the catalyst A (11), the catalyst B (13) and the low-rank coal (12) are 0 to 6 mm.
6. The reaction device for improving the quality of pyrolysis products of low-rank coal according to claim 5, wherein: The aperture of the through hole (10) is 3 mm.