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Negative pressure ignition and combustion system and negative pressure ignition and stable combustion method using same

A technology of stable combustion and negative pressure, applied in the combustion method, burner, combustion ignition and other directions, can solve the problems of large impact of the combustion chamber, deflagration phenomenon, difficult to stabilize the combustion pressure for a long time, and achieve the effect of maintaining the stability of negative pressure.

Pending Publication Date: 2020-08-07
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the current exhaust gas combustion treatment method in a closed environment with drastic and unstable airflow, the ubiquitous ignition process has severe pressure fluctuations, which has a large impact on the combustion chamber, deflagration may occur, the combustion pressure is difficult to stabilize permanently, and the combustion is not sufficient. Complete and other problems, the present invention provides a method for realizing non-impact ignition and flame-stabilized combustion in a confined space, which is used to provide a stable and reliable high-temperature combustion environment for waste gas treatment in a confined environment with drastic and unstable airflow changes, which can Realize the non-impact negative pressure ignition during the ignition process, as well as the stable pressure and flow supply of gas and combustion-supporting gas during the combustion process, and keep the negative pressure of the combustion system stable

Method used

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  • Negative pressure ignition and combustion system and negative pressure ignition and stable combustion method using same
  • Negative pressure ignition and combustion system and negative pressure ignition and stable combustion method using same

Examples

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Embodiment 1

[0021] Example 1: See figure 1 , natural gas is used as fuel gas, compressed air is used as combustion-supporting gas, and the volume ratio of compressed air to natural gas is 5:1 to 15:1; cooling water is passed into the spray cooling chamber 51, and the water flow is kept stable. Then open induced draft fan 53, form negative pressure in combustion chamber 41 and spray cooling chamber 51, measure the pressure in spray cooling chamber 51 with pressure transducer 52; Regulate the rotating speed of induced draft fan 53 with frequency converter 54, make spray cooling The degree of vacuum in the chamber 51 is kept constant within the range of -0.5 to -1 kPa. Then open the air solenoid valve, use the air mass flowmeter to control the combustion air to flow into the combustion chamber at a flow rate of 30L / min~50L / min, and the pressure is about 0.1MPa, then open the gas solenoid valve, according to the air-fuel ratio of 5:1~15:1 , Use a gas mass flow meter to control the correspond...

Embodiment 2

[0022] Example 2: See figure 1 , hydrogen is used as fuel gas, oxygen is used as combustion-supporting air, and the volume ratio of hydrogen to oxygen is 1.5:1 to 2.5:1. Pass cooling water into the spray cooling chamber 45, and keep the water flow stable, turn on the induced draft fan 52, form negative pressure in the combustion chamber 41 and the spray cooling chamber 45, measure the pressure in the spray cooling chamber 45 with the pressure sensor 51 . The frequency converter 53 is used to adjust the rotational speed of the induced draft fan 52 to keep the vacuum degree in the spray cooling chamber 45 in the range of -0.5~-1kPa and keep it constant. Then open the oxygen solenoid valve, use the oxygen mass flow meter to control the combustion-supporting oxygen to flow into the combustion chamber at a flow rate of 10L / min~20L / min, and the pressure is about 0.1MPa, then open the gas solenoid valve, according to the ratio of hydrogen to oxygen is 2:1, use The hydrogen mass flo...

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Abstract

The invention discloses a negative pressure ignition and combustion system and a negative pressure ignition and stable combustion method using the same. The negative pressure ignition and combustion system comprises a fuel gas and combustion-supporting gas supplying module, a burner module, a combustion chamber module and a pressure control module, wherein the fuel gas and combustion-supporting gas supplying module comprises a fuel gas supplying unit and a combustion-supporting gas supplying unit; the burner module comprises a burner and an ignition controller, the burner and a waste gas feeding pipe are both installed on a top cover of the combustion chamber module, and a certain inclined angle is formed between the waste gas feeding pipe and the top cover of the combustion chamber modulein the radial direction and the circumferential direction; and the pressure control module is used for keeping pressure in a combustion chamber to be stable negative pressure, and the magnitude of the negative pressure can be continuously adjusted within a certain range. The negative pressure ignition and combustion system can be used in a closed environment where the airflow is drastic in changeand unstable, a stable reliable high-temperature combustion environment can be provided for waste gas treatment, shock-free negative pressure ignition in the ignition process as well as stable pressure and flow supplying of fuel gas and combustion-supporting air in the combustion process are achieved, and stable negative pressure of the combustion system is kept.

Description

technical field [0001] The technical field of the present invention is the field of exhaust gas treatment and combustion technology, and specifically relates to a negative pressure ignition and combustion system and a method for negative pressure ignition and stable combustion using the system. Background technique [0002] At present, there are a variety of combustion treatment methods for combustible waste gas on the market, but for airtight environments with drastic and unstable airflow changes, there are generally severe pressure fluctuations during the ignition process, which has a large impact on the combustion chamber, deflagration may occur, and the combustion pressure is difficult. Long-term stability, insufficient combustion and other problems. [0003] Patent CN 104235875 B discloses an umbrella-shaped ignition device, which can realize a wide range of contact between arc sparks and gas, and has better ignition and combustion gas efficiency, but its structure is c...

Claims

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Application Information

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IPC IPC(8): F23G7/06F23D14/26F23Q3/00F23Q21/00
CPCF23D14/26F23G7/065F23G2209/14F23Q3/008F23Q21/00
Inventor 庞锋赵瀛樊竹陈红香马帅明焦桂萍李太峰李维刚
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP