Waste gas incineration anti-backfire device and system

Abstract

The utility model discloses a waste gas incineration anti-backfire device and system, the waste gas incineration anti-backfire device is arranged on a main waste gas pipe of a waste gas pipeline, the waste gas incineration anti-backfire device comprises a fire retarding mechanism, the fire retarding mechanism comprises at least two fire arresters, a water vapor pipe and a nitrogen pipe, and fire retarding cores of the fire arresters are arranged in the main waste gas pipe at intervals; one end of the water vapor pipe is communicated with the main waste gas pipe and used for introducing vaporous water into the main waste gas pipe, and one end of the nitrogen pipe is communicated with the main waste gas pipe and used for introducing nitrogen into the main waste gas pipe. The flame arrester has the advantages that tempering can be blocked through the flame arrester, in addition, vaporific water can be introduced into the main waste gas pipe through the water vapor pipe, nitrogen can be introduced into the main waste gas pipe through the nitrogen pipe, the added vaporific water and nitrogen can damage the combustion condition in the pipeline, and the flame arresting effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas incineration, in particular to a waste gas incineration backfire prevention device and system. Background Art

[0002] In order to improve the treatment effect of waste gas, waste gas is generally introduced into the incineration system for high-temperature incineration comprehensive treatment. The incineration of waste gas is carried out in a waste gas rotary kiln. During the incineration operation, the gas expansion pressure in the rotary kiln increases, causing the flame to rush to the air intake pipe and then spread to the workshop. This flashback phenomenon will cause serious losses to the company. The existing waste gas incineration anti-flashback device (such as a waste gas incineration transportation explosion-proof and anti-flashback safety system disclosed in application number 201710148244.8) uses a flame arrester arranged in the air intake pipe to block the flame, but some flames will still penetrate the flame arrester, and the flame blocking effect is poor. Utility Model Content

[0003] The purpose of the utility model is to overcome the above technical deficiencies and propose a waste gas incineration backfire prevention device and system to solve the technical problem that when a flame arrester is used to block the flame in the prior art, part of the flame will penetrate the flame arrester, resulting in poor fire blocking effect.

[0004] In order to achieve the above technical purpose, the technical solution of the utility model provides a waste gas incineration anti-backfire device, which is arranged on the main waste gas pipe of the waste gas pipeline, including:

[0005] The fire arresting mechanism comprises at least two flame arresters, a water vapor pipe and a nitrogen pipe, wherein the fire arresting cores of the flame arresters are arranged at intervals in the main exhaust pipe, one end of the water vapor pipe is connected to the main exhaust pipe for introducing mist water into the main exhaust pipe, and one end of the nitrogen pipe is connected to the main exhaust pipe for introducing nitrogen into the main exhaust pipe.

[0006] Furthermore, the water vapor pipe and the nitrogen pipe are both connected to the main exhaust pipe on the side of the flame arrester close to the main exhaust pipe outlet end.

[0007] Furthermore, the exhaust gas incineration anti-backfire device also includes a buffer mechanism, which is arranged on the main exhaust gas pipe and located between two adjacent flame arresters. The buffer mechanism divides the main exhaust gas pipe into an upstream section and a downstream section to buffer backfire.

[0008] Furthermore, the buffer mechanism includes a buffer tank, and two flow ports are opened on the side wall of the buffer tank, and the two flow ports are respectively connected to one end of the corresponding upstream section and the downstream section, a closable drain port is opened at the bottom of the buffer tank, and a closable pressure relief port is opened at the top of the buffer tank.

[0009] Furthermore, the buffer mechanism also includes a drain valve, which is arranged at the drain outlet to keep the drain outlet in an open or closed state.

[0010] Furthermore, the buffer mechanism also includes a bursting piece, which is arranged at the pressure relief port and is used to block the pressure relief port. When the pressure in the buffer tank is too high, the bursting piece will explode and rupture to open the pressure relief port.

[0011] On the other hand, the utility model also provides a waste gas incineration backfire prevention system, including a waste gas pipeline and the above-mentioned waste gas incineration backfire prevention device, the waste gas pipeline includes a main waste gas pipe, the inlet end of the main waste gas pipe is connected to the waste gas source, and the outlet end of the main waste gas pipe is connected to the air inlet of the rotary kiln.

[0012] Furthermore, the exhaust gas pipeline also includes a first cut-off valve, which is arranged on the main exhaust gas pipe and close to the inlet end of the main exhaust gas pipe.

[0013] Furthermore, the exhaust gas pipeline also includes at least two branch exhaust gas pipes, one end of each of the branch exhaust gas pipes is connected to a different exhaust gas source, and the other end of each of the branch exhaust gas pipes is connected to the inlet end of the main exhaust gas pipe.

[0014] Furthermore, the exhaust gas pipeline also includes at least two second cut-off valves, and each of the second cut-off valves is respectively arranged on the corresponding branch exhaust gas pipe.

[0015] Compared with the prior art, the beneficial effects of the utility model include: when in use, the exhaust gas enters the rotary kiln along the main exhaust pipe and is incinerated in the rotary kiln. In the process of incineration of the exhaust gas in the rotary kiln, the flame arrester can block the flashback. In addition, mist water can be introduced into the main exhaust pipe through the water vapor pipe, and nitrogen can be introduced into the main exhaust pipe through the nitrogen pipe. The added mist water and nitrogen can destroy the combustion conditions in the pipeline and improve the flame retardant effect. In addition, compared with nitrogen, mist water is not only cheap, but also has high pressure, and there is no risk of pressure loss, which can ensure the stability and safety of exhaust gas transportation and incineration, and has great promotion value in exhaust gas environmental protection management measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a waste gas incineration backfire prevention device and system provided by the utility model;

[0017] In the figure: 100 - exhaust pipe, 110 - main exhaust pipe, 111 - upstream section, 112 - downstream section, 120 - first shut-off valve, 130 - branch exhaust pipe, 140 - second shut-off valve, 200 - fire arrester, 210 - flame arrester, 220 - water vapor pipe, 230 - nitrogen pipe, 300 - buffer mechanism, 310 - buffer tank, 311 - flow outlet, 312 - drain outlet, 313 - pressure relief outlet, 320 - drain valve, 330 - bursting disc. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] The utility model provides a waste gas burning backfire prevention device, which is arranged on the main waste gas pipe 110 of the waste gas pipeline 100, and its structure is as follows Figure 1 As shown, it includes a fire-blocking mechanism 200, which includes at least two flame arresters 210, a water vapor pipe 220 and a nitrogen pipe 230. The fire-blocking cores of each of the flame arresters 210 are arranged at intervals in the main exhaust pipe 110. One end of the water vapor pipe 220 is connected to the main exhaust pipe 110 for passing mist water into the main exhaust pipe 110. One end of the nitrogen pipe 230 is connected to the main exhaust pipe 110 for passing nitrogen into the main exhaust pipe 110.

[0020] When in use, the exhaust gas enters the rotary kiln along the main exhaust pipe 110 and is incinerated in the rotary kiln. During the incineration of the exhaust gas in the rotary kiln, the flame arrester 210 can block the flashback. In addition, mist water can be introduced into the main exhaust pipe 110 through the water vapor pipe 220, and nitrogen can be introduced into the main exhaust pipe 110 through the nitrogen pipe 230. The added mist water and nitrogen can destroy the combustion conditions in the pipeline and improve the fire-retardant effect. In addition, compared with nitrogen, mist water is not only cheap, but also has high pressure, and there is no risk of pressure loss, which can ensure the stability and safety of exhaust gas transportation and incineration, and has great promotion value in exhaust gas environmental protection management measures.

[0021] As a preferred embodiment, please refer to Figure 1 The water vapor pipe 220 and the nitrogen pipe 230 are both connected to the main exhaust pipe 110 on the side of the flame arrester 210 close to the outlet end of the main exhaust pipe 110, so that the flashback is first blocked by the mist water and nitrogen and then blocked by the flame arrester 210.

[0022] As a preferred embodiment, please refer to Figure 1The exhaust gas incineration anti-flashback device also includes a buffer mechanism 300, which is arranged on the main exhaust pipe 110 and located between two adjacent flame arresters 210. The buffer mechanism 300 divides the main exhaust pipe 110 into an upstream section 111 and a downstream section 112 to buffer the flashback and further improve the flashback barrier effect. One end of the water vapor pipe 220 and one end of the nitrogen pipe 230 are both close to the outlet end of the downstream section 112.

[0023] As a preferred embodiment, please refer to Figure 1 The buffer mechanism 300 includes a buffer tank 310, and two flow ports 311 are provided on the side wall of the buffer tank 310. The two flow ports 311 are respectively connected to one end of the corresponding upstream section 111 and the downstream section 112. A closable drain port 312 is provided at the bottom of the buffer tank 310. Since there is water vapor in the pipeline, the water vapor condenses to form water, and the water in the buffer tank 310 can be discharged through the drain port 312. A closable pressure relief port 313 is provided on the top of the buffer tank 310. When the tempering passes through the fire-blocking mechanism 200 and enters the buffer tank 310, the pressure in the buffer tank 310 will increase. When the pressure in the buffer tank 310 increases to a preset value, the pressure relief port 313 is opened so that the pressure in the buffer tank 310 can be discharged.

[0024] As a preferred embodiment, please refer to Figure 1 The buffer mechanism 300 further includes a drain valve 320 , which is disposed at the drain port 312 to open or close the drain port 312 , thereby facilitating the discharge of water in the buffer tank 310 through the drain port 312 .

[0025] As a preferred embodiment, please refer to Figure 1 The buffer mechanism 300 also includes a bursting piece 330, which is arranged at the pressure relief port 313 to block the pressure relief port 313. When the pressure in the buffer tank 310 is too high, the bursting piece 330 will explode and rupture to open the pressure relief port 313, so that the buffer tank 310 has a self-pressure relief function.

[0026] Please refer to Figure 1Based on the above-mentioned waste gas incineration anti-backfire device, the utility model also provides a waste gas incineration anti-backfire system, including a waste gas pipeline 100 and the above-mentioned waste gas incineration anti-backfire device, the waste gas pipeline 100 includes a main waste gas pipe 110, the inlet end of the main waste gas pipe 110 is connected to the waste gas source, the outlet end of the main waste gas pipe 110 is connected to the air inlet of the rotary kiln, the waste gas enters the rotary kiln along the main waste gas pipe 110, and is incinerated in the rotary kiln. In the process of the rotary kiln incinerating the waste gas, the flame arrester 210 can block the flashback. In addition, mist water can be introduced into the main waste gas pipe 110 through the water vapor pipe 220, and nitrogen can be introduced into the main waste gas pipe 110 through the nitrogen pipe 230. The added mist water and nitrogen can destroy the combustion conditions in the pipeline and improve the fire-retardant effect.

[0027] As a preferred embodiment, please refer to Figure 1 The exhaust gas pipeline 100 also includes a first cut-off valve 120, which is arranged on the main exhaust gas pipe 110 and close to the inlet end of the main exhaust gas pipe 110 to control the introduction of exhaust gas. When the exhaust gas needs to be incinerated, the first cut-off valve 120 is opened, and the exhaust gas flows into the rotary kiln along the main exhaust gas pipe 110. When the exhaust gas does not need to be incinerated, the first cut-off valve 120 is closed to stop the exhaust gas from flowing into the rotary kiln along the main exhaust gas pipe 110. The first cut-off valve 120 is close to the inlet end of the upstream section 111.

[0028] As a preferred embodiment, please refer to Figure 1 The exhaust gas pipeline 100 also includes at least two branch exhaust gas pipes 130, one end of each branch exhaust gas pipe 130 is connected to a different exhaust gas source, and the other end of each branch exhaust gas pipe 130 is connected to the inlet end of the main exhaust gas pipe 110. The exhaust gas from different exhaust gas sources can be introduced into the rotary kiln through each branch exhaust gas pipe 130. In actual use, the exhaust gas source can be the exhaust gas from the three-effect storage tank, the exhaust gas from the three-effect vacuum pump, or the exhaust gas from the anaerobic pool of the sewage station. Gas, three-effect storage tank venting waste gas: characteristics are - normal pressure, small volume, with breathing characteristics, containing O2; three-effect vacuum pump tail gas: characteristics are - positive pressure, large volume (720M3 / H*2), containing O2, H2S content is about 25g / M3, VOC>1000mg / M3; sewage station anaerobic pool waste gas: characteristics are - positive pressure, large volume (about 4000M3 / day), does not contain O2, H2S content is about 12g / M3, VOC>1000mg / M3.

[0029] As a preferred embodiment, please refer to Figure 1The exhaust gas pipeline 100 also includes at least two second shut-off valves 140, each of which is respectively arranged on the corresponding branch exhaust gas pipe 130 to control the introduction of exhaust gas. When it is necessary to incinerate the exhaust gas in a certain exhaust gas source, the corresponding second shut-off valve 140 is opened, and the exhaust gas flows into the main exhaust gas pipe 110 along the corresponding branch exhaust gas pipe 130, and flows into the rotary kiln along the main exhaust gas pipe 110. When it is not necessary to incinerate the exhaust gas, the corresponding second shut-off valve 140 is closed to stop the exhaust gas from flowing into the main exhaust gas pipe 110 along the branch exhaust gas pipe 130.

[0030] As a preferred embodiment, please refer to Figure 1 The exhaust gas pipeline 100 also includes at least two driving pumps, the inlet ends of the two driving pumps are respectively connected to the corresponding exhaust gas sources, and the outlet ends of the two driving pumps are respectively connected to one end of the corresponding branch exhaust gas pipe 130, so as to draw the exhaust gas into the branch exhaust gas pipe 130 and speed up the exhaust gas entering the rotary kiln.

[0031] As a preferred embodiment, the outer wall of the main exhaust pipe 110 and each branch exhaust pipe 130 is painted with colored paint, and real-time monitoring is carried out to ensure that accidental fire can be discovered and handled in time. After long-term operation, there is no hidden danger of backfire in the pipeline.

[0032] In order to better understand the present invention, the following Figure 1 The working principle of the technical solution of the utility model is described in detail:

[0033] During use, when it is necessary to incinerate the waste gas in a certain waste gas source, the corresponding second shut-off valve 140 is opened, and the first shut-off valve 120 is opened, and the waste gas flows into the main waste gas pipe 110 along the corresponding branch waste gas pipe 130, and flows into the rotary kiln along the main waste gas pipe 110, and is incinerated in the rotary kiln. During the process of the rotary kiln incinerating the waste gas, the flame arrester 210 can block the flashback. In addition, mist water can be introduced into the main waste gas pipe 110 through the water vapor pipe 220, and nitrogen can be introduced into the main waste gas pipe 110 through the nitrogen pipe 230. The added mist water and nitrogen can destroy the waste gas in the pipeline. The combustion conditions are improved, and the fire-retardant effect is improved. In addition, compared with nitrogen, mist water is not only cheap, but also has high pressure. There is no risk of pressure loss, which can ensure the stability and safety of waste gas transportation and incineration. It has great promotion value in waste gas environmental protection management measures. When the backfire passes through the fire-retardant mechanism 200 and enters the buffer tank 310, the pressure in the buffer tank 310 will increase. When the pressure in the buffer tank 310 increases to a preset value, the bursting disc 330 will explode and rupture, so that the pressure relief port 313 is opened, and the pressure in the buffer tank 310 can be discharged. The pressure relief port 313 is blocked by the bursting disc 330, so that the buffer tank 310 has a self-pressure relief function.

[0034] The utility model provides a waste gas incineration anti-flashback device with the following beneficial effects:

[0035] (1) When the pressure in the buffer tank 310 rises to a preset value, the bursting disc 330 will explode and rupture, so that the pressure relief port 313 is opened, and the pressure in the buffer tank 310 can be discharged. The bursting disc 330 blocks the pressure relief port 313, so that the buffer tank 310 has a self-decompression function;

[0036] (2) Compared with nitrogen, mist water is not only cheap, but also has high pressure, and there is no risk of pressure loss. It can ensure the stability and safety of waste gas transportation and incineration, and has great promotion value in waste gas environmental protection treatment measures;

[0037] (3) The flame arrester 210 can be used to block the flashback. In addition, mist water can be introduced into the main exhaust pipe 110 through the water vapor pipe 220, and nitrogen can be introduced into the main exhaust pipe 110 through the nitrogen pipe 230. The added mist water and nitrogen can destroy the combustion conditions in the pipeline, thereby improving the flame arresting effect.

[0038] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A waste gas incineration backfire prevention device, arranged on the main waste gas pipe of the waste gas pipeline, characterized in that: include: The fire arresting mechanism comprises at least two flame arresters, a water vapor pipe and a nitrogen pipe, wherein the fire arresting cores of the flame arresters are arranged at intervals in the main exhaust pipe, one end of the water vapor pipe is connected to the main exhaust pipe for introducing mist water into the main exhaust pipe, and one end of the nitrogen pipe is connected to the main exhaust pipe for introducing nitrogen into the main exhaust pipe.

2. The exhaust gas incineration backfire prevention device according to claim 1, characterized in that: The water vapor pipe and the nitrogen pipe are both connected to the main exhaust pipe on the side of the flame arrester close to the main exhaust pipe outlet end.

3. The exhaust gas incineration backfire prevention device according to claim 1, characterized in that: It also includes a buffer mechanism, which is arranged on the main exhaust pipe and located between two adjacent flame arresters. The buffer mechanism divides the main exhaust pipe into an upstream section and a downstream section to buffer backfire.

4. The exhaust gas incineration backfire prevention device according to claim 3, characterized in that: The buffer mechanism includes a buffer tank, and two flow ports are opened on the side wall of the buffer tank, and the two flow ports are respectively connected with one end of the corresponding upstream section and the downstream section. A closable drain port is opened at the bottom of the buffer tank, and a closable pressure relief port is opened at the top of the buffer tank.

5. The exhaust gas incineration backfire prevention device according to claim 4, characterized in that: The buffer mechanism further includes a drain valve, which is disposed at the drain port to keep the drain port in an open or closed state.

6. The exhaust gas incineration backfire prevention device according to claim 4, characterized in that: The buffer mechanism also includes a bursting piece, which is arranged at the pressure relief port and is used to block the pressure relief port. When the pressure in the buffer tank is too high, the bursting piece will explode and rupture to open the pressure relief port.

7. A waste gas incineration backfire prevention system, characterized in that: It comprises a waste gas pipeline and a waste gas incineration backfire prevention device as described in any one of claims 1 to 6, wherein the waste gas pipeline comprises a main waste gas pipe, the inlet end of the main waste gas pipe is connected to the waste gas source, and the outlet end of the main waste gas pipe is connected to the air inlet of the rotary kiln.

8. The exhaust gas incineration backfire prevention system according to claim 7, characterized in that: The exhaust gas pipeline further includes a first cut-off valve, which is arranged on the main exhaust gas pipe and close to the inlet end of the main exhaust gas pipe.

9. The waste gas incineration backfire prevention system according to claim 7, characterized in that: The exhaust gas pipeline further includes at least two branch exhaust gas pipes, one end of each of the branch exhaust gas pipes is respectively connected to a different exhaust gas source, and the other end of each of the branch exhaust gas pipes is connected to the inlet end of the main exhaust gas pipe.

10. The waste gas incineration backfire prevention system according to claim 9, characterized in that: The exhaust gas pipeline further includes at least two second cut-off valves, and each of the second cut-off valves is respectively arranged on the corresponding branch exhaust gas pipe.

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