Unlock instant, AI-driven research and patent intelligence for your innovation.

Gas burning shaft kiln damping-down and re-blowing system and control method

A control method and a technology of shutting down and recovering air, which are applied to the furnace control device, furnace cooling, furnace, etc., and can solve the problems of gas poisoning, waste time, waste power, etc.

Active Publication Date: 2020-11-17
SGIS SONGSHAN CO LTD
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the existing gas-fired shaft kiln needs to be operated manually when it is planned to shut down and re-air. Large, manual operation requires workers to constantly run around to open or close various components in time, which not only has the problems of cumbersome, time-consuming, wasteful power, and low safety, but also is prone to gas poisoning, fire and other accidents

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gas burning shaft kiln damping-down and re-blowing system and control method
  • Gas burning shaft kiln damping-down and re-blowing system and control method
  • Gas burning shaft kiln damping-down and re-blowing system and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] see figure 2 , a gas-fired vertical kiln resting and returning air system 1b, which includes: a gas-fired vertical kiln 10, a gas surrounding pipe 20, an air surrounding pipe 40, a nitrogen pipe, a cold air pipe 60, an air induction pipe 70 and a control system (not shown in the figure) ).

[0053] The gas-fired shaft kiln 10 has sleeve-type burners 11 evenly arranged along the periphery of the kiln body of the gas-fired shaft kiln 10, and each burner 11 has a gas shut-off valve and an auxiliary gas shut-off valve, wherein the gas shut-off valve and the auxiliary gas shut-off valve The gas shut-off valve is normally open.

[0054] The gas surrounding pipe 20 is arranged around the gas-fired shaft kiln 10 and can be selectively communicated with each burner 11 through a gas shut-off valve. Drain tube.

[0055] Wherein, the gas valve includes a first gas valve 22 and a second gas valve 23. Optionally, the gas main pipe 21 can be preheated through a heat exchanger 30, ...

Embodiment 2

[0086] Using the gas-fired vertical kiln shutdown and re-air system provided in Example 1 as a framework, a specific gas-fired vertical kiln shutdown and re-air control method is run.

[0087] Among them, the diameter of the nitrogen surrounding pipe is Φ150. Set the parameters of nitrogen purge gas surrounding pipe and air surrounding pipe during planned wind shutdown and emergency wind shutdown: pressure 0.5MPa, flow rate 80m 3 / min, purge time 10s.

[0088] Use the original control system of the gas fired kiln to compile the automatic control program: please refer to Figure 4 , when the “planned wind off” button is pressed to trigger the planned wind off process, the PLC will issue a command to automatically close the gas valve and open the second relief valve within 5s, then close the air valve and cold air valve within 5s, and open the first purge valve and the second purge valve, purge the gas surrounding pipe and the air surrounding pipe for 10s each, close the first...

Embodiment 3

[0092] Using the gas-fired vertical kiln shutdown and re-air system provided in Example 1 as a framework, a specific gas-fired vertical kiln shutdown and re-air control method is run.

[0093] Among them, the diameter of the nitrogen surrounding pipe is Φ200. Set the parameters of nitrogen purge gas surrounding pipe and air surrounding pipe during planned wind shutdown and emergency wind shutdown: pressure 0.6MPa, flow rate 100m 3 / min, purge time 9s.

[0094] Use the original control system of the gas-fired kiln to compile the automatic control program: when the "planned wind shutdown" button is pressed to trigger the planned wind shutdown process, the PLC will issue an instruction to automatically close the gas valve within 6s and open the second relief valve, and then within 6s Close the air valve and cold air valve internally, open the first purge valve and the second purge valve, purge the gas surrounding pipe and the air surrounding pipe for 9s, close the first purge va...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a gas burning shaft kiln damping-down and re-blowing system and a control method, and relates to the technical field of gas burning shaft kilns. The gas burning shaft kiln damping-down and re-blowing system comprises a gas burning shaft kiln, a gas bustle pipe, an air bustle pipe, a nitrogen pipe, a cold air pipe, an air inducing pipe and a control system, the control methodbased on the gas burning shaft kiln damping-down and re-blowing system can greatly improve automatic control over damping-down and re-blowing operation, and can achieve linkage automatic intelligentoperation through background monitoring of the control system, automatic processing operation of damping-down and re-blowing is achieved in a short time, and automatic and safe kiln shutdown can be achieved without manual intervention.

Description

technical field [0001] The present application relates to the technical field of gas-fired shaft kiln, and in particular, relates to a gas-fired shaft kiln shutdown and recovery system and a control method. Background technique [0002] Gas-fired vertical kiln refers to a vertical kiln that uses gas as fuel and arranges upper and lower rows of burners around the middle section of the kiln chamber. Because it can use low calorific value pure blast furnace gas, the one-time furnace life of the kiln is longer than that of rotary kilns, sleeve kilns, The double-chamber kiln with parallel flow heat storage has the advantages of long length, high equipment operation rate, low operation cost, and small investment per ton of product. It is still one of the main kiln types for the production of metallurgical lime in small and medium-sized iron and steel industries. [0003] The building height of the gas-fired kiln is about 35m, the effective height is about 22m, and the inner diamet...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F27B1/10F27B1/26F27D19/00F27D9/00
CPCF27B1/10F27B1/26F27D19/00F27D9/00F27D2019/0028F27D2009/0005
Inventor 张银斌张兴国陈永文唐兵宾鸿伟胡显阳杨勇攀王国强
Owner SGIS SONGSHAN CO LTD