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Device system and method for gradient absorption of copper slag waste heat based on coal gasification reaction

A technology of coal gasification and copper slag, applied in gasification process, granular/powder fuel gasification, chemical industry and other directions, can solve problems such as environmental pollution, improve energy quality and achieve the effect of clean utilization

Pending Publication Date: 2020-10-02
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Based on this, the present invention provides a device system and method for cascaded absorption of copper slag waste heat based on coal gasification reaction, which can realize efficient recovery and utilization of copper slag waste heat, and solve the problem of environmental pollution caused by traditional coal combustion. The supply of heat required for the chemical reaction

Method used

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  • Device system and method for gradient absorption of copper slag waste heat based on coal gasification reaction
  • Device system and method for gradient absorption of copper slag waste heat based on coal gasification reaction
  • Device system and method for gradient absorption of copper slag waste heat based on coal gasification reaction

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Effect test

Embodiment 1

[0068] C=64.4% in the coal powder that this example adopts, H=4.2%, O=8.8%, ash content=20%, volatile matter content=32.8%, fixed carbon content=44.8%, coal powder specific heat capacity C 2 = 1.1 kJ / (kg·°C).

[0069] A device system and method for cascade absorption of copper slag waste heat based on coal gasification reaction. The structure is as follows: figure 2 As shown, it includes a dry granulation device 1, a gasification furnace 2, a waste heat boiler 3 and auxiliary equipment. The gasification furnace 2 is mainly composed of a furnace body, a feeding device and a synthesis gas processing device 5. The feeding device has a pulverized coal storage bin 4 and a screw feeder 6 .

[0070] The method for recovering copper slag cascade waste heat by using the above-mentioned device, the process flow chart is as follows figure 1 shown. The process is mainly composed of granulation, gasification and waste heat utilization of waste heat boiler. The main raw materials of ga...

Embodiment 2

[0079] This example adopts the above-mentioned device to carry out the method for copper slag cascade waste heat recovery, and the process flow chart is as follows figure 1 As shown, the structure is shown in Figure 2. Specific steps are as follows:

[0080] (1) Copper slag granulation

[0081] The high-temperature copper slag in the molten state enters the dry granulation device 1, where it is transformed into spherical high-temperature particles at 1100°C due to the centrifugal force and surface tension in the dry granulation device 1, and then enters the gasifier 2.

[0082] (2) Waste heat recovery of high temperature copper slag particles

[0083] The high-temperature copper slag particles at 1000°C enter the gasifier 2, and the pulverized coal enters the gasifier 2 from the screw feeder 6 through the pulverized coal storage bin 4. The high-temperature copper slag particles move from top to bottom in the gasifier 2, and the gasification reaction quickly absorbs the heat...

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Abstract

The invention discloses a device system and method for gradient absorption of copper slag waste heat based on a coal gasification reaction. The method comprises the steps of carrying out copper slag granulation, carrying out the coal gasification reaction, carrying out waste heat recovery through a waste heat boiler and the like. The method specifically comprises the following steps that copper slag is prepared into high-temperature spherical slag particles, and the slag particles gradually provide heat for the coal gasification reaction and the waste heat boiler process; pulverized coal is subjected to heat exchange with the slag particles and is subjected to the gasification reaction under the action of a water vapor and a gasifying agent to absorb the heat of the slag particles so as togenerate synthesis gas containing CO, H2 and CH4; and cold water absorbs heat through heat exchange with the slag particles and is converted into water vapor to serve as the gasifying agent for the gasification reaction. According to the device system and method, the solid slag particle waste heat recovery efficiency is improved to 75% or above, and meanwhile high resource utilization of the coaland copper slag is achieved.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, and in particular relates to a device system and method for absorbing waste heat of copper slag in steps based on coal gasification reaction. Background technique [0002] Copper slag is an important by-product of the copper smelting industry. Its discharge temperature is as high as 1300°C, and it contains rich waste heat resources. In recent years, with the development of industry, the annual output of copper slag has been increasing, and the annual output of copper slag in my country can reach tens of millions of tons. At present, the main treatment methods for copper slag in industry are stacking or water quenching. Stacking treatment not only wastes waste heat but also occupies land resources; the water quenching method requires 0.8 to 1.2 tons of fresh water per ton of copper slag, which consumes a lot of water resources and produces sulfur oxides, hydrogen sulfide and other acid gases ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/248C10J3/46C10J3/48C10J3/50C10J3/72
CPCC22B1/248C10J3/46C10J3/48C10J3/50C10J3/72C10J2300/0936C10J2300/12Y02P20/10Y02P20/129
Inventor 左宗良韩晓蕾马瑛超付佳婷罗思义于庆波
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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