Low-calorific-value flare gas combustion-supporting accompanying burner

Abstract

The utility model discloses a low-calorific-value flare gas combustion-supporting co-combustion device which comprises a furnace end, a first gas pipe is installed on the lower surface of the furnace end in a communicated mode, a gas inlet is formed in the outer surface of the first gas pipe, a combustion-supporting gas source supply mechanism is rotatably installed on the outer surface of the gas inlet of the first gas pipe, and a gas valve is installed on the lower surface of the first gas pipe in a communicated mode. Through the design of the combustion-supporting gas source supply mechanism, combustion-supporting gas flow supply can be accurately adjusted according to the actual flare gas flow, it is ensured that combustion-supporting gas and flare gas are always kept in a proper proportion, and therefore efficient combustion is achieved.

Description

Technical Field

[0001] This utility model relates to the field of low-calorific-value gas treatment technology, specifically to a low-calorific-value flare gas combustion aid and accompaniment device. Background Technology

[0002] Flare gas refers to waste gas generated during industrial production processes such as petroleum and chemical manufacturing. It mainly consists of combustible gases, such as hydrocarbons like methane, ethane, and propane, as well as hydrogen and carbon monoxide. These gases are typically produced during oil refining, chemical production, and natural gas processing. Due to their complex composition, they may contain toxic and harmful substances, thus requiring combustion treatment.

[0003] For example, the national authorized patent announcement number CN206112929U discloses a low-calorific-value gas accompaniment burner, including a burner body, on which a primary air damper, nozzle, ejector, igniter, secondary air damper, combustion chamber, flame tube, heat storage block, burner, and windproof cover are provided; this utility model provides a low-calorific-value gas accompaniment burner with a novel structure. Compared with the prior art, this utility model has the following advantages: a) It uses low-calorific-value gas (blast furnace gas or converter gas) as fuel gas, which greatly reduces gas costs; b) Due to the low calorific value of the gas used, the safety of operation is improved; c) The structure is simple and compact, and the installation is convenient; d) The combustion temperature is lower, which improves the service life of the equipment.

[0004] However, the aforementioned low-calorific-value gas combustion device cannot automatically adjust the injection flow of the auxiliary combustion gas according to the flow rate of the low-calorific-value gas during the mixing process. When the flow rate of the low-calorific-value gas is large and the injection flow rate of the auxiliary combustion gas is insufficient, the gas cannot be completely burned, which will lead to incomplete combustion of the low-calorific-value gas and produce incomplete combustion products such as carbon monoxide, causing environmental pollution. Utility Model Content

[0005] The purpose of this invention is to provide a low-calorific-value flare gas combustion aid and accompaniment device to solve the problem mentioned in the background art that the injection flow rate of the combustion aid gas cannot be automatically adjusted according to the flow rate of the low-calorific-value gas during the mixing process.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A low-calorific-value flare gas combustion aid includes: a furnace head, a first gas pipe connected to the lower surface of the furnace head, an air inlet on the outer surface of the first gas pipe, a gas supply mechanism rotatably mounted on the outer surface of the air inlet of the first gas pipe, and a gas valve connected to the lower surface of the first gas pipe.

[0008] Preferably, a mesh is fixedly installed on the outer surface of the burner head.

[0009] Preferably, the combustion-supporting gas supply mechanism is located above the flare gas valve, so that the combustion-supporting gas can be preferentially injected into the first gas pipe to mix with the subsequently injected flare gas, so that the first injected combustion-supporting gas will preferentially burn to ignite the mixed gas.

[0010] Preferably, multiple sets of spiral blades are fixedly installed inside the first gas pipe. The multiple sets of spiral blades can form a static mixer by combining with the first gas pipe, so that the combustion-supporting gas injected into the first gas pipe and the flare gas can be fully mixed.

[0011] Preferably, the gas supply mechanism includes a flow meter and a rotating pipe. The flow meter is connected and installed between the first gas pipe and the gas valve, and is located at the lower end of the gas inlet. The rotating pipe rotates in a sealed manner on the outer surface of the gas inlet, and a second gas pipe is connected and installed on the outer surface of the rotating pipe.

[0012] Preferably, the second trachea can be rotated on the outer surface of the air inlet via a rotating tube.

[0013] Preferably, an electric butterfly valve is connected to the middle section of the second gas pipe, so that the electric butterfly valve can change the opening of the second gas pipe according to the flare gas volume measured by the flow meter, thereby regulating the flow rate of the combustion-supporting gas.

[0014] Preferably, the signal transmitting end of the flow meter is connected to the signal receiving end of the controller, and the control output end of the controller is electrically connected to the electric control end of the electric butterfly valve. The flow meter and the controller are Emerson Micro Motion 5700 and Emerson Fisher 667, respectively.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. Through the design of the first gas pipe, air inlet, spiral vane, and combustion-supporting gas supply mechanism, flare gas and combustion-supporting gas can be simultaneously injected into the first gas pipe via the gas valve and the combustion-supporting gas supply mechanism. Since the combustion-supporting gas supply mechanism is located above the flare gas valve, the combustion-supporting gas is preferentially injected into the first gas pipe to mix with the subsequently injected flare gas. This allows the first-injected combustion-supporting gas to preferentially burn and ignite the mixed gas, which helps improve the initial combustion efficiency. Especially for some flare gases that are difficult to ignite, preferential combustion ensures a smooth start to the combustion process and provides a stable initial state for the subsequent combustion of the mixed gas, further promoting the efficient operation of the entire combustion process. After entering the first gas pipe, the flare gas and combustion-supporting gas can be controlled using the mechanisms set within the first gas pipe. The spiral blades create a vortex between the injected combustion gas and flare gas within the first gas pipe, enhancing the mixing effect of the two gases. This ensures sufficient contact and mixing of the combustion gas and combustion gas molecules, allowing for a more uniform distribution and greater contact with oxygen during combustion, thus improving the completeness of combustion. The flare gas, upon entering the first gas pipe, first passes through the combustion gas supply mechanism. This mechanism measures the flare gas flow rate and sends it to the controller, which automatically adjusts the opening of the combustion gas supply mechanism to regulate the combustion gas flow rate. This allows for precise adjustment of the combustion gas supply based on the actual flare gas flow rate, ensuring that the combustion gas and flare gas maintain a suitable ratio for efficient combustion.

[0017] 2. Through the design of the flow meter, the second gas pipe, and the electric butterfly valve, flare gas and combustion-supporting gas can be injected into the first gas pipe simultaneously through the gas valve and the second gas pipe. When the flare gas enters the first gas pipe, it first passes through the flow meter, which then measures the flow rate of the flare gas and sends it to the controller. The controller can then automatically control the opening of the electric butterfly valve, thereby limiting the flow rate of combustion-supporting gas into the second gas pipe. This allows for the regulation of the combustion-supporting gas flow rate, and the combustion-supporting gas flow rate can be precisely adjusted according to the actual flare gas flow rate to ensure that the combustion-supporting gas and flare gas always maintain a suitable ratio, thus achieving efficient combustion. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the low-calorific-value flare gas combustion aid and stoker of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the fence of this utility model;

[0020] Figure 3 This is a schematic diagram of the spiral blade of this utility model;

[0021] Figure 4This is a schematic diagram of the air inlet and the combustion gas supply mechanism of this utility model.

[0022] In the diagram: 1. Burner head; 101. Enclosure net; 102. First gas pipe; 103. Air inlet; 104. Spiral blade; 2. Combustion-supporting gas supply mechanism; 201. Flow meter; 202. Rotary pipe; 203. Second gas pipe; 204. Electric butterfly valve; 3. Gas valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-3 As shown, this embodiment provides a low-calorific-value flare gas combustion aid, including: a furnace head 1, a first gas pipe 102 connected to the lower surface of the furnace head 1, an air inlet 103 opened on the outer surface of the first gas pipe 102, a gas supply mechanism 2 rotatably installed on the outer surface of the air inlet 103 of the first gas pipe 102, and a gas valve 3 connected to the lower surface of the first gas pipe 102.

[0025] A mesh 101 is fixedly installed on the outer surface of the burner head 1.

[0026] The combustion-supporting gas supply mechanism 2 is located above the flare gas valve 3, which allows the combustion-supporting gas to be preferentially injected into the first gas pipe 102 and mixed with the subsequently injected flare gas, so that the first injected combustion-supporting gas will be preferentially burned to ignite the mixed gas.

[0027] Multiple sets of spiral blades 104 are fixedly installed inside the first gas pipe 102. The multiple sets of spiral blades 104 can form a static mixer by combining with the first gas pipe 102, so that the combustion-supporting gas injected into the first gas pipe 102 and the flare gas can be fully mixed.

[0028] Through the design of the first gas pipe 102, air inlet 103, spiral vane 104, and combustion-supporting gas supply mechanism 2, flare gas and combustion-supporting gas can be simultaneously injected into the first gas pipe 102 via the gas valve 3 and the combustion-supporting gas supply mechanism 2. Since the combustion-supporting gas supply mechanism 2 is located above the gas valve 3 for the flare gas, the combustion-supporting gas can be preferentially injected into the first gas pipe 102 to mix with the subsequently injected flare gas. This allows the first-injected combustion-supporting gas to preferentially burn to ignite the mixed gas, which helps improve the initial combustion efficiency. Especially for some flare gases that are difficult to ignite, preferential combustion ensures a smooth start to the combustion process and provides a stable initial state for the subsequent combustion of the mixed gas, further promoting the efficient operation of the entire combustion process. After the flare gas and combustion-supporting gas enter the first gas pipe 102, they can be used for the first gas... The spiral blades 104 installed inside the pipe 102 create a vortex between the injected combustion gas and flare gas within the first gas pipe 102, thereby enhancing the mixing effect of the two gases. This ensures that the combustion gas and combustion gas are in full contact and mixed thoroughly, allowing the molecules of the combustion gas and flare gas to be more evenly distributed. During combustion, they can come into more full contact with oxygen, thus improving the completeness of combustion. When the flare gas enters the first gas pipe 102, it first passes through the combustion gas supply mechanism 2. The combustion gas supply mechanism 2 measures the flow rate of the flare gas and sends it to the controller. The controller can then automatically control the opening of the combustion gas supply mechanism 2, thereby adjusting the flow rate of the combustion gas. This allows for precise adjustment of the combustion gas supply based on the actual flare gas flow rate, ensuring that the combustion gas and flare gas always maintain a suitable ratio, thus achieving efficient combustion.

[0029] like Figure 4 As shown, the gas supply mechanism 2 includes a flow meter 201 and a rotating pipe 202. The flow meter 201 is connected and installed between the first gas pipe 102 and the gas valve 3, and is located at the lower end of the gas inlet 103. The rotating pipe 202 rotates in a sealed manner on the outer surface of the gas inlet 103, and a second gas pipe 203 is connected and installed on the outer surface of the rotating pipe 202.

[0030] The second trachea 203 can rotate on the outer surface of the air inlet 103 via the rotating tube 202.

[0031] An electric butterfly valve 204 is connected to the middle section of the second gas pipe 203, which allows the electric butterfly valve 204 to change the opening of the second gas pipe 203 according to the flare gas volume measured by the flow meter 201, thereby regulating the flow rate of the combustion-supporting gas.

[0032] The signal transmitter of flow meter 201 is connected to the signal receiver of controller, and the control output of controller is electrically connected to the electric control terminal of electric butterfly valve 204. The flow meter 201 and the controller are Emerson Micro Motion5700 and Emerson Fisher 667, respectively.

[0033] Through the design of the flow meter 201, the second gas pipe 203, and the electric butterfly valve 204, flare gas and combustion-supporting gas can be injected into the first gas pipe 102 simultaneously through the gas valve 3 and the second gas pipe 203. When the flare gas enters the first gas pipe 102, it first passes through the flow meter 201, which measures the flow rate of the flare gas and sends it to the controller. The controller can then automatically control the opening of the electric butterfly valve 204, thereby limiting the flow rate of the combustion-supporting gas into the second gas pipe 203. This allows for the regulation of the combustion-supporting gas flow rate, enabling precise adjustment of the combustion-supporting gas supply based on the actual flare gas flow rate. This ensures that the combustion-supporting gas and flare gas maintain a suitable ratio, thus achieving efficient combustion.

[0034] Based on the above technical solution, the working steps of this solution are summarized as follows: During use, flare gas and combustion-supporting gas can be simultaneously injected into the first gas pipe 102 through the gas valve 3 and the second gas pipe 203. The second gas pipe 203 is located above the flare gas valve 3, allowing the combustion-supporting gas to be preferentially injected into the first gas pipe 102 and mixed with the subsequently injected flare gas. This causes the first-injected combustion-supporting gas to burn preferentially to ignite the mixed gas, which helps improve the initial combustion efficiency. When the flare gas enters the first gas pipe 102, it first passes through the flow meter 201, allowing the flow meter 201 to measure the flare gas flow rate and send it to the controller, enabling the controller to... The opening of the electric butterfly valve 204 is automatically controlled, thereby limiting the flow rate of the combustion gas entering the second gas pipe 203. This allows for the regulation of the combustion gas flow rate, which can then be precisely adjusted according to the actual flare gas flow rate. This ensures that the combustion gas and flare gas maintain a suitable ratio. After the mixed flare gas and combustion gas enter the first gas pipe 102, the spiral blades 104 installed in the first gas pipe 102 can create a vortex between the injected combustion gas and flare gas, thereby enhancing the mixing effect of the two gases. This ensures that the combustion gas and combustion gas come into full contact and mix thoroughly in the burner head 1 for combustion.

[0035] In summary, this low-calorific-value flare gas combustion aid can precisely adjust the supply of combustion aid gas according to the actual flare gas flow rate, ensuring that the combustion aid gas and flare gas always maintain a suitable ratio, thereby achieving efficient combustion.

[0036] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Low heating value flare gas pilot burner characterized in that, The utility model relates to a kind of torch head and its combustion-supporting gas source supply mechanism, including: Furnace head (1), the lower surface of the furnace head (1) is connected with the installation of first gas pipe (102), the outer surface of the first gas pipe (102) is provided with air inlet (103), the air inlet (103) of the first gas pipe (102) is rotatably installed with combustion-supporting gas source supply mechanism (2) outside, the lower surface of the first gas pipe (102) is connected with the installation of gas valve (3); The combustion-supporting gas source supply mechanism (2) includes flowmeter (201) and swivel pipe (202), the flowmeter (201) is connected between first gas pipe (102) and gas valve (3), and is located in the lower end of air inlet (103), the swivel pipe (202) is sealed and rotates on the outer surface of air inlet (103), the outer surface of the swivel pipe (202) is connected with the installation of second gas pipe (203);The second gas pipe (203) can be rotated on the outer surface of air inlet (103) by swivel pipe (202);The middle section of the second gas pipe (203) is connected with the installation of electric butterfly valve (204), and the electric butterfly valve (204) can change the opening of second gas pipe (203) according to the amount of torch gas measured by flowmeter (201);The signal transmitting end of the flowmeter (201) is connected with the signal receiving end of controller, and the control output end of controller is electrically connected with the electric control end of the electric butterfly valve (204).

2. The low heating value flare gas pilot burner of claim 1, wherein: The outer surface of the furnace head (1) is fixedly installed with the surrounding net (101).

3. The low heating value flare gas pilot burner of claim 1, wherein: The combustion-supporting gas source supply mechanism (2) is located on the upper end of the gas valve (3) of torch gas, so that the combustion-supporting gas can be injected into the first gas pipe (102) in priority and mixed with the later-injected torch gas, and the first-injected combustion-supporting gas can be combusted in priority to ignite the mixed gas.

4. The low heating value flare gas pilot burner of claim 3, wherein: A plurality of helical blades (104) are fixedly installed in the first gas pipe (102), and the plurality of helical blades (104) can form a static mixer by combination with the first gas pipe (102), so that the combustion-supporting gas and the torch gas injected into the first gas pipe (102) can be fully mixed.

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