Direct recovery method and device applicable to industrial high-flow large-regulation-ratio flare gas

Abstract

The invention provides a direct recovery method and device applicable to industrial high-flow large-regulation-ratio flare gas. The flare gas sent from a flare gas pipe network is divided into two ways, wherein one way of flare gas can be conveyed to a gas cabinet, boosted through a compressor unit and then conveyed to a fuel gas pipe network; the other way of flare gas can pass through a liquid separation tank and arrive at a water sealed tank; when the pressure of the flare gas is higher than the height of a water seal of the water sealed tank, the flare gas enters a ground torch or an elevated torch to be incinerated; on a normal operating condition, the flare gas is conveyed to the fuel gas pipe network, and the ground torch and the elevated torch are put out; on a small accident condition, the flare gas is discharged into the ground torch to be incinerated, the gas cabinet operates normally, and the elevator torch is put out; on an emergent and large accident condition, the ground torch, the elevated torch and the gas cabinet conduct emergency treatment. Through the method and device, the disposal capacity is high, the flare gas with the discharge amount being 2000 tons per hour or more can be incinerated and treated through combined utilization of the ground torch and the elevated torch, and the requirement for safety discharge is met. The direct recovery method and device have the advantages that safety and reliability are achieved, and configuration is reasonable.

Description

technical field

[0001] The invention relates to a method and device suitable for direct recovery of industrial large-flow discharge, large adjustment ratio, and high-calorific value flare gas. The method and device for directly recovering flare gas with high calorific value and regulating ratio can extinguish the overhead flare under normal working conditions and completely recycle the flare gas. Background technique

[0002] At present, in the petrochemical industry and coal chemical industry, a large amount of combustible flare gas that cannot be directly used and must be discharged will be generated when the production equipment is on and off, in normal operation, and in accidents such as fire, power failure, and water cutoff. The composition of the gas is complex and the flow fluctuates in a large range. Usually, the elevated flare is directly burned at high altitude for treatment. However, the combustion efficiency of elevated flares is relatively low, and the incomple...

Examples

Embodiment 1

[0023] Such as figure 1 As shown, the present invention is applicable to a direct recovery device for industrial large flow rate and large adjustment ratio flare gas, which includes a flare gas pipeline network 1, and the flare gas sent from the flare gas pipeline network 1 is divided into two paths, and one path is connected to the gas The inlet of cabinet 8, and the other gas connection to the inlet of separator tank 2;

[0024] The outlet of the gas cabinet 8 is connected to the inlet of the compressor unit 9, and the outlet of the compressor unit 9 is connected to the fuel gas pipeline network 10; A self-control valve 7 is provided on the connection pipeline between the flare gas pipeline network 1 and the inlet of the gas cabinet 8 , an automatic control valve is provided on the connection pipeline between the outlet of the gas cabinet 8 and the compressor unit 9 , and a manual valve 6 is provided on the fuel gas pipeline network 10 .

[0025] The outlet of liquid separa...

Embodiment 2

[0028] Adopt a kind of device described in embodiment 1 to be applicable to the direct recovery method of industrial large flow, large adjustment ratio flare gas, specifically as follows:

[0029] The torch gas sent from the torch gas pipeline network 1 is divided into two paths, one path of gas can be transported to the gas cabinet 8, after being boosted by the compressor unit 9, it can be transported to the fuel gas pipeline network 10; the other path of gas can pass through the liquid separation tank 2 to the water seal tank 3. When the pressure of the flare gas is greater than the water seal height of the water seal tank 3, the flare gas enters the ground flare 5 or elevated flare 4 for incineration;

[0030] Under normal working conditions, the flare gas is delivered to the fuel gas pipeline network 10 and the ground flare 5 and the overhead flare 4 are extinguished. Under normal working conditions, the self-control valve 7 provided at the outlet and inlet of the gas cabi...

technical field

[0001] The invention relates to a method and device suitable for direct recovery of industrial large-flow discharge, large adjustment ratio, and high-calorific value flare gas. The method and device for directly recovering flare gas with high calorific value and regulating ratio can extinguish the overhead flare under normal working conditions and completely recycle the flare gas. Background technique

[0002] At present, in the petrochemical industry and coal chemical industry, a large amount of combustible flare gas that cannot be directly used and must be discharged will be generated when the production equipment is on and off, in normal operation, and in accidents such as fire, power failure, and water cutoff. The composition of the gas is complex and the flow fluctuates in a large range. Usually, the elevated flare is directly burned at high altitude for treatment. However, the combustion efficiency of elevated flares is relatively low, and the incomple...

Examples

Embodiment 1

[0023] Such as figure 1 As shown, the present invention is applicable to a direct recovery device for industrial large flow rate and large adjustment ratio flare gas, which includes a flare gas pipeline network 1, and the flare gas sent from the flare gas pipeline network 1 is divided into two paths, and one path is connected to the gas The inlet of cabinet 8, and the other gas connection to the inlet of separator tank 2;

[0024] The outlet of the gas cabinet 8 is connected to the inlet of the compressor unit 9, and the outlet of the compressor unit 9 is connected to the fuel gas pipeline network 10; A self-control valve 7 is provided on the connection pipeline between the flare gas pipeline network 1 and the inlet of the gas cabinet 8 , an automatic control valve is provided on the connection pipeline between the outlet of the gas cabinet 8 and the compressor unit 9 , and a manual valve 6 is provided on the fuel gas pipeline network 10 .

[0025] The outlet of liquid separa...

Embodiment 2

[0028] Adopt a kind of device described in embodiment 1 to be applicable to the direct recovery method of industrial large flow, large adjustment ratio flare gas, specifically as follows:

[0029] The torch gas sent from the torch gas pipeline network 1 is divided into two paths, one path of gas can be transported to the gas cabinet 8, after being boosted by the compressor unit 9, it can be transported to the fuel gas pipeline network 10; the other path of gas can pass through the liquid separation tank 2 to the water seal tank 3. When the pressure of the flare gas is greater than the water seal height of the water seal tank 3, the flare gas enters the ground flare 5 or elevated flare 4 for incineration;

[0030] Under normal working conditions, the flare gas is delivered to the fuel gas pipeline network 10 and the ground flare 5 and the overhead flare 4 are extinguished. Under normal working conditions, the self-control valve 7 provided at the outlet and inlet of the gas cabi...

Images