Phase-change-free heat-exchange integrated heating raw material coal water slurry gasification system and process

A technology of gasification system and coal water slurry, which is applied in the direction of gasification process, granular/powdered fuel gasification, chemical industry, etc. It can solve the problems of unusable low-grade steam heat, easy fouling and blockage of heat exchangers, and flash evaporation High equipment investment and other issues, to achieve the effect of improving energy utilization efficiency, improving system reliability and online rate, and reducing operation difficulty

Inactive Publication Date: 2018-12-25
KUNSHAN UNITED ENERGY TECH CO LTD
8 Cites 1 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0006] What the present invention intends to solve is that in the existing coal gasification process, the investment in flashing equipment is high, multiple phase transitions occur during heat reco...
View more

Abstract

The invention discloses a coal water slurry gasification system. The coal water slurry gasification system comprises a gasification furnace, a washing tower, a settling tank, a grey water tank, a coalwater slurry/black water heat exchanger and a grey water/black water heat exchanger which are sequentially arranged and connected through pipelines and is characterized in that the black water inputend of the coal water slurry/black water heat exchanger is connected with the black water output ends of the gasification furnace and the washing tower; the black water input end of the grey water/black water heat exchanger is connected with the black water output end of the coal water slurry/black water heat exchanger; the black water output end of the grey water/black water heat exchanger is connected with the black water input end of the settling tank; the grey water input end of the grey water/black water heat exchanger is connected with the grey water output end of the grey water tank; the grey water output end of the grey water/black water heat exchanger is connected with the grey water input end of the washing tower. The coal water slurry gasification system has the advantages thathigh-temperature black water is subjected to two heat exchanger heat exchanges to heat coal water slurry and grey water, phase change is avoided, low-grade heat energy can be recycled, energy recycling efficiency is increased, a complex flash system is not needed, and equipment investment cost is lowered.

Application Domain

Chemical industryGasification processes details +1

Technology Topic

Coal waterEnergy recycling +10

Image

  • Phase-change-free heat-exchange integrated heating raw material coal water slurry gasification system and process

Examples

  • Experimental program(1)

Example Embodiment

[0038] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0039] like figure 1 As shown, it is a schematic structural diagram of an integrated heating raw material coal-water slurry gasification system without phase change heat exchange, gasifier 1, scrubber 2, coal-water slurry/black water heat exchanger 5, gray water/black water exchanger The heater 6, the settling tank 3 and the gray water tank 4 are arranged in sequence and connected by pipelines. Among them, the coal water slurry/black water heat exchanger 5 and the gray water/black water heat exchanger 6 are all new non-fouling heat exchangers, and both choose shell-and-tube type non-fouling heat exchangers, and the internal exchange The heat pipes are corrugated elbows arranged in parallel, and the inner and outer surfaces of the elbows are coated with high-impact alumina ceramic coating. In the coal water slurry/black water heat exchanger 5 and the gray water/black water heat exchanger 6 The black water inlet end of each is clamped with a detachable ceramic filter screen, and the gray water input end of the gray water/black water heat exchanger 6 is also clamped with a detachable ceramic filter screen. The coal-water slurry input end of the coal-water slurry/black water heat exchanger 5 is connected with a coal-water slurry feed pump 51, and by adjusting the rotating speed of the coal-water slurry feed pump 51, the water in the coal-water slurry/black water heat exchanger 5 is controlled. The flow rate of coal water slurry is 0.5~3m/s.
[0040] The coal water slurry output end of coal water slurry/black water heat exchanger 5 is connected with the input end of gasifier 1, and the black water input end of coal water slurry/black water heat exchanger 5 is connected with gasifier 1 and scrubber 2 The black water output end of the coal water slurry/black water heat exchanger 5 is connected with the black water input end of the gray water/black water heat exchanger 6, and the black water output end of the gray water/black water heat exchanger 6 is connected. The water output end is connected with the settling tank 3, the gray water input end of the gray water/black water heat exchanger 6 is connected with the gray water tank 4, and the gray water output end of the gray water/black water heat exchanger 6 is connected with the washing liquid of the washing tower 2 ( That is gray water) input. A syngas pump 11 is connected between the gasification furnace 1 and the scrubber 2, a black water pump 21 is installed at the position after the black water in the gasification furnace 1 and the scrubber 2 merges, and a gray water tank 4 and a gray water/black water heat exchanger 6 are connected. A gray water pump 61 is connected between them,
[0041] Adjust the rotating speed of described black water pump 21, control the black water velocity in described coal-water slurry/black water heat exchanger 5 and gray water/black water heat exchanger 6 to be 0.5~3m/s; By adjusting gray water pump 61 Rotating speed, control the gray water flow velocity in the gray water/black water heat exchanger 6 to be 0.5~3m/s. After heat exchange, the gray water temperature is 90-280°C, and the coal-water slurry temperature is 60-200°C.
[0042] The production process of the coal gasification process using the integrated heating raw material coal-water slurry gasification system without phase change heat exchange includes the following steps:
[0043] (1) The coal-water slurry enters the coal-water slurry pipeline of the coal-water slurry/black water heat exchanger 5 through the coal-water slurry pump 51, and the high-temperature black water in the black water pipeline of the coal-water slurry/black water heat exchanger 5 Carry out heat exchange on the coal-water slurry to heat the coal-water slurry, which is a heat exchange;
[0044] (2) The heated coal-water slurry is input into the gasifier 1 for gasification reaction, the residue after the reaction is directly discharged, and the high-temperature black water enters the black water of the coal-water slurry/black water heat exchanger 5 through the black water pump 21 In the pipeline, the syngas enters into the scrubber 2 through the syngas pump 11, and the high-temperature black water after the syngas is washed by the scrubber in the scrubber 2 also enters the black water of the coal-water slurry/black water heat exchanger 5 through the black water pump 21. in water pipes;
[0045] (3) The high-temperature black water in the coal-water slurry/black water heat exchanger 5 enters the black water pipeline of the gray water/black water heat exchanger 6 after a heat exchange, and the gray water in the gray water tank 4 passes through the gray water. The water pump 61 enters the gray water pipeline of the gray water/black water heat exchanger 6, and the gray water is heated by the high-temperature black water after the first heat exchange, which is the second heat exchange;
[0046] (4) The heated gray water enters the washing liquid input end of the washing tower 2 for washing the synthesis gas, the black water after the second heat exchange enters the settling tank 3 for residue precipitation, and the supernatant liquid enters the gray water tank 4 , which is gray water.
[0047] The integrated heating raw material coal-water slurry gasification system without phase change heat exchange of the present invention is used to carry out the production process of the coal gasification process. Taking a gasification series with a coal input of 1500 tons/day as an example, compared with the existing flash Steam recovery heat technology saves heat equivalent to about 14,400 tons of standard coal, improves black water heat recovery efficiency by 25%, and improves overall plant energy efficiency by about 2.9%. Depending on the type of coal, it can save 5%-15% of gasification island investment.
[0048] The coal water slurry/black water heat exchanger 5 and the gray water/black water heat exchanger 6 in the above-mentioned embodiment are all one. The heat is recycled as completely as possible.

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Urban domestic waste deep resource utilization system and method

PendingCN109536191Ahigh flash pointhigh calorific value
Owner:黑龙江九地生金科技有限公司

Tar gasification circulating device and gasification system

PendingCN107325841Ahigh calorific value
Owner:湖南省环境保护科学研究院

Classification and recommendation of technical efficacy words

  • high calorific value
  • Reduce energy loss

Technology and equipment for preparation of synthetic gas by two-stage high temperature biomass gasification

InactiveCN102226107AImprove equipment production capacityhigh calorific value
Owner:INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY

Oily biomass wood dust particle fuel formula with high combustion value and preparation method thereof

InactiveCN103060043Ahigh calorific valuegood compression ratio
Owner:柳州宝源生物燃料有限公司

Method for comprehensive treatment of wastewater and sludge gas utilization of cane sugar factory

InactiveCN101492222AEliminates corrosive and pollutinghigh calorific value
Owner:GUANGXI YUEGUI GUANGYE HOLDINGS CO LTD

Preparation of solid bio-fuel block

Owner:NORTHEAST FORESTRY UNIVERSITY +1
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products