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Automatic low-pressure protection system for coke oven gas pipeline

A coke oven gas, automatic protection technology, applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as affecting the normal use of users, accidents and losses caused by pipeline tempering, and avoid gas backflow accidents. , to ensure safe production, to ensure the effect of stability and reliability

Inactive Publication Date: 2012-08-01
XINXING DUCTILE IRON PIPES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the coke oven fan suddenly fails and shuts down, the pressure of the coke oven gas pipeline disappears, and the pipeline backfire may cause an accident, which will seriously affect the normal use of each user and cause immeasurable losses

Method used

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  • Automatic low-pressure protection system for coke oven gas pipeline
  • Automatic low-pressure protection system for coke oven gas pipeline

Examples

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Embodiment Construction

[0018] Such as figure 1 It can be seen from the illustrated embodiment that the coke oven gas pipeline low-pressure automatic protection system according to the present invention includes three sets of pressure detection switches and a pressure transmitter 5 arranged on the gas delivery pipeline 2, and each set of pressure detection switches It includes a low-voltage detection switch 3 and a high-pressure detection switch 4; a nitrogen gas delivery pipeline 6 is connected to the gas delivery pipeline 2 at the coke oven gas outlet of the coke oven 1, and an electric control is provided on the nitrogen delivery pipeline 6 Pneumatic valve 7; the electro-pneumatic valve 7 is connected to the output end of the on-site PLC controller 9, and the pressure detection switch and pressure transmitter 5 are connected to the input end of the on-site PLC controller 9 respectively.

[0019] Two manual switching valves 8 are also arranged on the nitrogen delivery pipeline 6; the on-site PLC co...

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Abstract

The invention discloses an automatic low-pressure protection system for a coke oven gas pipeline and belongs to the technical field of coke oven gas supply in the metallurgy industry. The automatic low-pressure protection system comprises three groups of pressure detection switches arranged on a gas transporting pipeline, wherein each group of pressure detection switches comprises a low-pressure detection switch and a high-pressure detection switch; a nitrogen gas transporting pipeline is connected onto the gas transporting pipeline positioned at a coke oven gas outlet of a coke oven; an electropneumatic valve is arranged on the nitrogen gas transporting pipeline and is connected with the output end of a field PLC (Programmable Logic Controller); and the pressure detection switches are connected with the input end of the field PLC. The automatic low-pressure protection system disclosed by the invention has the benefits that the pressure detection switches are arranged on the gas transporting pipeline so as to realize real-time monitoring of a pressure signal; and the electropneumatic valve is opened and closed and the nitrogen gas transporting pipeline is communicated and closed by the field PLC, and therefore, the pressure value in the nitrogen gas transporting pipeline is enabled to be positioned within safety range and gas back flow accidents are effectively avoided.

Description

technical field [0001] The invention relates to a coke oven gas pipeline low-pressure automatic protection system, which belongs to the technical field of coke oven gas supply in the metallurgical industry. Background technique [0002] Coke oven gas, also known as coke oven gas, is a kind of combustible gas produced while producing coke and tar products after high-temperature dry distillation in the coke oven. It is coking coal Industrial by-products. The coke oven gas produced by the coke oven is supplied to users after being connected to the grid through pipelines. If the coke oven fan suddenly fails and shuts down, the pressure of the coke oven gas pipeline disappears, and the pipeline backfire may cause an accident, which will seriously affect the normal use of users and cause immeasurable losses. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a low-pressure automatic protection system for coke oven gas p...

Claims

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Application Information

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IPC IPC(8): F17D5/00F17D3/01
Inventor 刘海深武建华
Owner XINXING DUCTILE IRON PIPES CO LTD
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