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Method for power generation by waste heat of coal gas

A waste heat power generation and gas technology, which is applied to electromechanical devices, electrical components, circuit devices, etc., can solve the problems of gas pollution, waste of resources, etc., and achieve the effects of consuming electricity resources, saving electricity, and reducing emissions.

Inactive Publication Date: 2009-01-14
NANJING BANQIAO SLAG
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the coal gas discharged from large-scale steelmaking plants pollutes the environment and wastes resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] First, dust is removed through the filter bag, and the gas is recovered and purified. Two 10000m 3 It is stored in a gas cabinet to solve the problem of gas fluctuation and instability, and then it is transported to the power plant through pipelines for combustion by two 20T / h boilers to generate steam with a pressure of 24.5Mpa and a temperature of 400°C, which is distributed to the two gas boilers through the main steam main pipe. The turbines run forward and drive the generators with a capacity of 3000kw to the rated speed of 3000 r / min, and generate 10kv line voltage 50HZ alternating current at the two ends of the generator in a three-phase manner by self-excitation, and deliver power to users in the form of isolated grid operation , after power transformation for the use of units.

[0007] The power generation capacity of the isolated grid operation of the power plant is determined by the size of the load. Taking the company's power load of 4100KW as an example, mi...

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PUM

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Abstract

The invention relates to a method for using the rest heat of coal gas to generate electricity; the method comprises the following steps: the rest coal gas of a blast furnace is purified, recycled and conveyed to a boiler of an electric power plant for burning; the generated steam is distributed to a gas turbine for rotation-impulsing, so as to drive a capacity generator to rotate, and generate alternating current at the three phases of the two ends of the generator in a mode of self-excitation, and the electricity is conveyed to users by a single-net operation for use after power transformation; the invention reduces the discharge of harmful gas, recoveries and uses the gas for electricity generation, saves the quantity of electricity, reduces the consumption, saves the electricity cost and does not consume electric resources additionally.

Description

technical field [0001] The invention relates to a method for recycling metallurgical and chemical waste gas, in particular to a method for generating electricity with waste heat of coal gas. Background technique [0002] In the smelting process of large steelmaking plants, toxic and harmful gas (containing 22.8% CO) will be produced, and its calorific value is 3760KJ / NM 2 , equivalent to 1 / 8 or even 1 / 10 of natural gas. Except a part for self-use, the rest of the gas is discharged into the sky, polluting the air and wasting resources. Contents of the invention [0003] The technical problem to be solved by the invention is: the coal gas discharged from large-scale steelmaking plants pollutes the environment and wastes resources. [0004] The technical solution of the present invention is: gas waste heat power generation method, using filter bags to remove dust, purifying and recovering blast furnace residual gas, storing it in the gas cabinet, solving the problem of gas ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D15/10C21B7/00H02K7/18H02J3/00
Inventor 汪根海
Owner NANJING BANQIAO SLAG
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