Dual-purpose gas mixing combustion chamber

Abstract

The utility model discloses a dual-purpose mixed combustion chamber for coal gas, which belongs to the field of combustion chambers and comprises a dual-purpose mixed combustor and a mixed combustion chamber, the dual-purpose mixed combustor penetrates through the side wall of the mixed combustion chamber, and a backflow device is arranged in the mixed combustion chamber. The dual-purpose mixed burner comprises an air blowing device, an air supply pipeline located on one side of the air blowing device, a coal gas branch pipe located on the side wall of the air supply pipeline, a pulverized coal branch pipe penetrating through the side wall of the air supply pipeline and a secondary air blowing pipeline penetrating through the air supply pipeline and the pulverized coal branch pipe. Compared with the prior art, the device has the advantages that the secondary blast pipeline of the device blows in a multi-section split-flow mode, so that pulverized coal and coal gas can be uniformly kept in a rotational flow state in the conveying process, the situation that rotational flow wind is weakened due to the fact that a gas supply pipeline is too long is avoided, the output wind power is guaranteed, and meanwhile the conveying efficiency is improved. And the situation that the pulverized coal is accumulated in the coal gas branch pipe due to insufficient wind power is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of combustion chamber, specifically is a coal gas dual -purpose mixed combustion chamber. BACKGROUND

[0002] In the existing industrial production, in order to improve the operating efficiency of mechanical equipment (such as thermal power plant etc.), the combustion chamber that provides energy for mechanical equipment is the key, the traditional combustion chamber is through burning coal to provide heat, but burning coal will appear a large amount of coal dregs in the process of burning, and will appear the condition of insufficient combustion, causes the waste of burning coal, therefore, in order to improve the combustion efficiency of burning coal, people will grind it into coal powder, then burns in the combustion chamber by mixed wind blowing, to improve the utilization rate of burning coal, but with the development and use of coal gas, in order to avoid the insufficient situation of coal powder due to accident, the combustion material used in the combustion chamber at present is mostly coal gas dual -purpose mixed combustion, in case of need.

[0003] The existing coal gas dual -purpose mixed combustion chamber is provided with energy by dual -purpose mixed combustor, and then the heat generated by the mixed combustion chamber is transmitted to the corresponding mechanical equipment, the existing dual -purpose mixed combustor provides oxygen and power for the coal gas output by the coal gas branch pipe through the air blowing device, and the two are mostly perpendicular structure, so that the coal gas output by the coal gas branch pipe and the oxygen output by the air blowing device form a cyclone wind, so that the two are fully mixed in the state of cyclone wind, to ensure that the coal gas can be fully burned in the state of oxygen enrichment, similarly, the coal powder branch pipe passes through the gas supply pipeline and has a certain angle bending in the inside of the gas supply pipeline, to ensure that the coal powder advances in the state of cyclone in the coal powder branch pipe, in the transmission process of coal gas and coal powder, in order to ensure the wind power intensity of transmission, a secondary air blowing pipeline (the secondary air blowing pipeline is located behind the coal gas branch pipe) is usually arranged on one side of the coal powder branch pipe and the gas supply pipeline, through the secondary acceleration of wind power, the coal powder and coal gas can maintain corresponding speed when being sprayed (in order to avoid the loss of heat, a backflow device is usually installed in the mixed combustion chamber to ensure that the fuel gas in the exhaust gas can be fully burned).

[0004] The existing secondary air blowing pipeline is mostly arranged behind the corner of the coal gas branch pipe and behind the coal gas branch pipe, to accelerate the coal powder and coal gas in the state of cyclone, and accelerate the mixing, but at present, the number of most secondary air blowing pipelines is single, and only one acceleration can be provided, so that the cyclone speed is still in the state of decrease before and after accelerating the coal powder and coal gas, and it is difficult to maintain the stable output of cyclone coal gas and coal powder. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is that the secondary air blowing pipeline of the existing coal gas dual -purpose mixed combustion chamber cannot uniformly output wind power in the gas supply pipeline, so that the cyclone coal gas and coal powder are difficult to maintain stable output.

[0006] To solve the above technical problems, the utility model provides a technical scheme for a coal-gas dual-purpose mixed combustion chamber, comprising a dual-purpose mixed combustor and a mixed combustion chamber, the dual-purpose mixed combustor penetrating through the side wall of the mixed combustion chamber, the inside of the mixed combustion chamber being provided with a backflow device, the dual-purpose mixed combustor comprising a blast device, a gas supply pipeline on one side of the blast device, a coal gas branch pipeline on the side wall of the gas supply pipeline, a pulverized coal branch pipeline penetrating through the side wall of the gas supply pipeline, and a secondary blast pipeline penetrating through the gas supply pipeline and the pulverized coal branch pipeline, the number of the secondary blast pipelines being several, the secondary blast pipelines penetrating through the gas supply pipeline and the pulverized coal branch pipeline alternately, and the secondary blast pipelines being connected with the backflow device through a shunt pipeline.

[0007] As an improvement, one side of the gas supply pipeline and the coal gas branch pipeline is provided with an electromagnetic control flow valve, the gas outlet end of the gas supply pipeline is provided with a diffusion ring, and the gas supply pipeline and the coal gas branch pipeline are connected with the electromagnetic control flow valve through threads.

[0008] As an improvement, the pulverized coal branch pipeline and the gas supply pipeline are connected with the secondary blast pipeline through welding.

[0009] As an improvement, the inside of the mixed combustion chamber is provided with several alternately arranged baffles, a dust filter screen is arranged between the baffles, and the inside of the mixed combustion chamber is provided with an isolation chamber for protecting the safety of the secondary blast pipeline.

[0010] As an improvement, the backflow device comprises an air inlet at the top end of the mixed combustion chamber and an air extraction device on one side of the air inlet, and the air inlet is connected with the air extraction device through a corrosion-resistant pipeline.

[0011] As an improvement, a secondary blast device is arranged on one side of the top end of the mixed combustion chamber, and the secondary blast device and the air extraction device are connected with the gas inlet of the shunt pipeline through a tee pipeline.

[0012] The secondary blast device and the air extraction device are connected with the top end side wall of the mixed combustion chamber through a bolt structure.

[0013] Compared with the prior art, the advantages of the utility model lie in that the secondary blast pipeline of the device is a multi-section shunt blowing device, so that the pulverized coal and the coal gas can be kept in a uniform cyclone state during transmission, the cyclone wind will not weaken due to the overlong gas supply pipeline, the output wind force is ensured, and the pulverized coal will not accumulate in the coal gas branch pipeline due to insufficient wind force. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a total structure left side view of the utility model of a coal-gas dual-purpose mixed combustion chamber.

[0015] Figure 2It is a total structure right side view of a coal gas dual-purpose mixed combustion chamber.

[0016] Figure 3 It is a coal dust branch pipe sectional view of the coal gas dual-purpose mixed combustion chamber.

[0017] Figure 4 It is a coal gas branch pipe sectional view of the coal gas dual-purpose mixed combustion chamber.

[0018] As shown in the drawings: 1, mixed combustor; 11, air blowing device; 12, gas supply pipeline; 13, coal gas branch pipe; 14, coal dust branch pipe; 15, secondary air blowing pipeline; 151, secondary air blowing device; 16, shunt pipe; 2, mixed combustion chamber; 21, baffle; 22, dust filter screen; 23, isolation chamber; 3, backflow device; 31, air inlet; 32, air extraction device; 4, electromagnetic control flow valve; 5, diffusion ring; 6, tee pipeline. DETAILED DESCRIPTION

[0019] The utility model makes further detailed description in combination with the drawings.

[0020] As shown in the drawings Figure 1 , 2 , 3, including dual-purpose mixed combustor 1 and mixed combustion chamber 2, the dual-purpose mixed combustor 1 passes through the lateral wall of mixed combustion chamber 2, the inside of mixed combustion chamber 2 is equipped with a plurality of alternately arranged baffle 21, dust filter screen 22 is arranged between baffle 21, and the coal ash of combustion is filtered out through dust filter screen 22, to ensure that waste gas does not appear dust pollution before being discharged.

[0021] The inside of mixed combustion chamber 2 is equipped with backflow device 3, backflow device 3 includes air inlet 31 located at the top end of mixed combustion chamber 2 and air extraction device 32 located at one side of air inlet 31, air inlet 31 is connected with air extraction device 32 through corrosion-resistant pipeline, one side of the top end of mixed combustion chamber 2 is equipped with secondary air blowing device 151, secondary air blowing device 151 and air extraction device 32 are connected with the gas inlet of shunt pipe 16 through tee pipeline 6, and secondary air blowing device 151 and air extraction device 32 are connected with the top end lateral wall of mixed combustion chamber 2 through bolt structure, the waste gas has higher heat and unburnt coal gas, these coal gas is guided by air extraction device 32, is sucked out from air inlet 31, and thus enters secondary circulation, in order to ensure that the oxygen content in backflow device 3 can reach the oxygen content of secondary blowing, tee pipeline 6 is used to connect air extraction device 32 and secondary air blowing device 151, the output power of the two is adjusted, to ensure that the oxygen content in backflow gas is reasonable.

[0022] As shown in the drawings Figure 1 , 3As shown in FIG. 1, FIG. 2 and FIG. 4, the inside of the mixed combustion chamber 2 is provided with a reflux device 3, the dual-purpose mixed burner 1 comprises a blast device 11, a gas supply pipeline 12 on one side of the blast device 11, a gas branch pipe 13 on the side wall of the gas supply pipeline 12, a pulverized coal branch pipe 14 passing through the side wall of the gas supply pipeline 12, and a secondary blast pipeline 15 passing through the gas supply pipeline 12 and the pulverized coal branch pipe 14, the number of the secondary blast pipeline 15 is several, the secondary blast pipeline 15 passes through the gas supply pipeline 12 and the pulverized coal branch pipe 14 alternately, the secondary blast pipeline 15 is connected with the reflux device 3 through a shunt pipe 16, the inside of the mixed combustion chamber 2 is provided with an isolation chamber 23 for protecting the safety of the secondary blast pipeline 15, the pulverized coal branch pipe 14 and the secondary blast pipeline 15 are connected through welding, the air outlet of the blast device 11 is welded to the air inlet of the gas supply pipeline 12, the air inlet of the pulverized coal branch pipe 14 passes through the side hole of the gas supply pipeline 12, and the two are welded by using a welding machine, the pulverized coal branch pipes 14 in the gas supply pipeline 12 are parallel to each other, in order to ensure that the flow rate of the pulverized coal in the pulverized coal branch pipe 14 and the flow rate of the gas in the gas supply pipeline 12 can be maintained, several secondary blast pipelines 15 are installed behind the corners of the pulverized coal branch pipe 14 and behind the gas branch pipe 13, the flow rate of the pulverized coal and the gas is maintained stable by blowing through the air outlets in multiple stages, in order to maintain the wind power of all the secondary blast pipelines 15 stable, the branch pipes of the shunt pipe 16 are sleeved on all the secondary blast pipelines 15, and the three-way pipeline 6 connected with the reflux device 3 and the secondary blast pipeline 15 is welded to the total interface of the shunt pipe 16 by using a corrosion-resistant pipeline.

[0023] The gas outlet end of the gas supply pipeline 12 is provided with a diffusion ring 5, the inside of the mixed combustion chamber 2 is provided with an isolation chamber 23 for protecting the safety of the secondary blast pipeline 15, one side of the gas supply pipeline 12 and the gas branch pipe 13 is provided with an electromagnetic flow valve 4, the gas supply pipeline 12 and the gas branch pipe 13 are connected with the electromagnetic flow valve 4 through threads, in order to maintain stable input, the air inlets of the gas branch pipe 13 and the pulverized coal branch pipe 14 are controlled by using the electromagnetic flow valve 4, the other end of the electromagnetic flow valve 4 is fixed in the pulverized coal input pipeline and the gas pipeline by using sealing glue, and the diffusion ring 5 is welded to the output end of the gas supply pipeline 12, so as to ensure stable output of the output gas and the pulverized coal.

[0024] The utility model discloses in the specific implementation, according to the demand start -up blast device 11 and the electromagnetic control flow valve 4 connected in the coal dust branch pipe 14 or gas branch pipe 13, control corresponding flow rate by adjusting electromagnetic control flow valve 4, control the mixing ratio in this way, start -up secondary blast device 151, control its wind force by adjusting the power output of secondary blast device 151, make secondary acceleration wind even enter secondary blast duct 15 in shunt pipe 16, keep the stable output of gas and coal dust, after the ignition of the igniter, start -up exhaust device 32, carry out secondary recycling use to the combustible gas in waste gas, simultaneously, adjust the power of secondary blast device 151 and exhaust device 32, keep the stable output of wind force of secondary blast duct 15, to this end complete the full use of dual -purpose mixed burner 1.

[0025] The above describes the utility model and its implementation, and this kind of description has no limit, and the embodiment shown in the drawing is only one of the utility model, and the actual structure is not limited to this. In general, if the ordinary skilled person in the art is inspired, without departing from the utility model creation tenet, the similar structure mode and embodiment of not creative design are not limited to this.

Claims

1. A dual-purpose gas combustion chamber, comprising a dual-purpose combustion burner (1) and a combustion chamber (2), wherein the dual-purpose combustion burner (1) passes through the side wall of the combustion chamber (2), and the combustion chamber (2) is provided with a reflux device (3), wherein the dual-purpose combustion burner (1) comprises a blower (11), a gas supply pipe (12) located on one side of the blower (11), a gas branch pipe (13) located on the side wall of the gas supply pipe (12), a pulverized coal branch pipe (14) passing through the side wall of the gas supply pipe (12), and a secondary blower pipe (15) passing through the gas supply pipe (12) and the pulverized coal branch pipe (14), characterized in that: The number of secondary air ducts (15) is several. The secondary air ducts (15) alternately pass through the gas supply duct (12) and the coal powder branch pipe (14) in sequence. The secondary air ducts (15) are connected to the return device (3) through the diversion pipe (16).

2. The dual-purpose gas and coal gas combustion chamber according to claim 1, characterized in that: An electromagnetic flow control valve (4) is provided on one side of both the gas supply pipe (12) and the gas branch pipe (13). A diffuser ring (5) is provided at the gas outlet end of the gas supply pipe (12). The gas supply pipe (12) and the gas branch pipe (13) are both connected to the electromagnetic flow control valve (4) by threads.

3. The dual-purpose gas and coal gas combustion chamber according to claim 1, characterized in that: The pulverized coal branch pipe (14), the gas supply pipe (12), and the secondary blower pipe (15) are all connected by welding.

4. The dual-purpose gas and coal gas combustion chamber according to claim 1, characterized in that: The interior of the mixing combustion chamber (2) is provided with several alternating partitions (21), and a dust filter screen (22) is provided between the partitions (21). The interior of the mixing combustion chamber (2) is provided with an isolation chamber (23) to protect the secondary blower duct (15).

5. The dual-purpose gas and coal gas combustion chamber according to claim 1, characterized in that: The reflux device (3) includes an air inlet (31) located at the top of the mixing combustion chamber (2) and an exhaust device (32) located on one side of the air inlet (31). The air inlet (31) is connected to the exhaust device (32) through a corrosion-resistant pipe.

6. The dual-purpose gas and coal gas combustion chamber according to claim 1, characterized in that: The top side of the mixing combustion chamber (2) is provided with a secondary blower (151), and the secondary blower (151) and the air extraction device (32) are both connected to the air inlet of the diverter pipe (16) through a three-way pipe (6).

7. A dual-purpose gas and coal gas combustion chamber according to claim 6, characterized in that: The secondary blower (151) and the exhaust device (32) are both connected to the top side wall of the mixing combustion chamber (2) by bolts.

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