Conveying device and conveying method
A conveying device and pulverized coal technology, which is applied in the field of coal gasification, can solve the problems of high-pressure conveying gas, complex production operations, and increased consumption ratio, and achieve small conveying resistance, reduce production costs, and reduce equipment manufacturing and installation difficulties. Effect
Pending Publication Date: 2022-07-01
ENN SCI & TECH DEV
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Problems solved by technology
The existing pulverized coal transportation adopts the pressure-changing lock bucket to realize the pressurized transportation of pulverized coal, which consumes a lot of high-pressure conveying gas and high energy consumption
Field data shows that the high-pressure gas consumed by pulverized coal in the pressurization of the variable pressure lock hopper accounts for more than 60% of the total consumption, and the proportion of consumption increases correspondingly with the increase of the conveying pressure. After the lock hopper is discharged, the high-pressure gas passes through the two stages Or three-stage decompression filtration and venting loss; at the same time, the higher the pressurization pressure of the lock bucket, the longer the charging and decompression operation time, the production operation is complicated, and the work efficiency is getting lower and lower.
Method used
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Embodiment 1
[0069] Slurry gasification 8.0-8.2MPaCO2 pressure conveying scheme of pulverized coal
[0070] In this embodiment, the pulverized coal pressurized conveying device is a gasifier to transport pulverized coal, and the inlet operating pressure of the pulverized coal burner of the gasifier is 8.0 MPa. The pulverized coal pressurized conveying device includes a low pressure pulverized coal storage tank 1, a liquid carbon dioxide storage tank 2, a carbon dioxide pulverized coal slurry tank 3, a slurry mixing pressure pump 4, a pipeline heat exchanger 5, a high pressure pulverized coal storage tank 6 and a carbon dioxide filter device 7.
[0071] like figure 2 As shown, the pre-cooled pulverized coal in the low-pressure pulverized coal storage tank 1 is continuously or intermittently added to the carbon dioxide pulverized coal slurry tank 3 through the coal discharge line 31, and is stirred and mixed with the carbon dioxide liquid from the liquid carbon dioxide storage tank 2 to fo...
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Abstract
The invention relates to the technical field of coal gasification, in particular to a conveying device and a conveying method. The conveying device comprises a low-pressure pulverized coal storage tank, a liquid carbon dioxide storage tank, a slurry mixing tank, a pressure pump and a pipeline heat exchanger, the low-pressure pulverized coal storage tank is used for storing pulverized coal; the liquid carbon dioxide storage tank is used for storing carbon dioxide in a fluid state; an outlet of the low-pressure pulverized coal storage tank and an outlet of the liquid carbon dioxide storage tank are both connected with an inlet of the slurry mixing tank, and an outlet of the slurry mixing tank is connected with an inlet of the pressure pump; the pipeline heat exchanger comprises a first channel, an outlet of the pressure pump is connected with an inlet of the first channel, and an outlet of the first channel is connected with an inlet of a high-pressure pulverized coal storage tank. The problems of high loss of high-pressure gas and low operation efficiency in the pressurized conveying process of pulverized coal are solved.
Description
technical field [0001] The present disclosure relates to the technical field of coal gasification, and in particular, to a conveying device and a conveying method. Background technique [0002] In recent years, new coal gasification technology has been widely used in chemical, electric power, energy and other fields. Among the new coal gasification technologies, entrained bed coal gasification is an advanced continuous feed gasification technology, which has the advantages of large gasification capacity, high cold gas efficiency and high carbon conversion rate. According to the different feeding methods, entrained bed coal gasifiers are mainly divided into two types: coal-water slurry feeding and dry powder feeding. In the existing technology, the pulverized coal feeding generally meets the requirements of pulverized coal pressurization and transportation through intermittent feeding, pressure transformer tank pressure, and high-pressure pneumatic conveying. Pulverized coa...
Claims
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IPC IPC(8): C10J3/50C10J3/46F17D1/08F17D1/14F17D3/01
CPCC10J3/506F17D1/088F17D1/14F17D3/01C10J3/466C10J2300/0933
Inventor刘刚池学金侯祥生
OwnerENN SCI & TECH DEV