CN217423232U - Multi-stage ignition burner suitable for pulverized coal combustion or gasification equipment - Google Patents
Multi-stage ignition burner suitable for pulverized coal combustion or gasification equipment Download PDFInfo
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- CN217423232U CN217423232U CN202221281704.7U CN202221281704U CN217423232U CN 217423232 U CN217423232 U CN 217423232U CN 202221281704 U CN202221281704 U CN 202221281704U CN 217423232 U CN217423232 U CN 217423232U
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- ignition
- pulverized coal
- burner
- equipment
- gasification
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Abstract
The utility model discloses a multistage ignition nozzle suitable for fine coal burning or gasification equipment. When pulverized coal combustion or gasification equipment is adopted, ignition starting of the equipment needs an ignition burner, and the ignition burner is used for heating the equipment to reach the working condition that pulverized coal can be combusted or gasified. The utility model discloses a central wind channel, the center department in central wind channel is equipped with an ignition subassembly, and one and the communicating precombustion chamber of its inner chamber are connected to the front end in central wind channel, and one and the communicating flame nozzle of its inner chamber are connected to the front end of this precombustion chamber, central wind channel be combustion-supporting wind passageway. The utility model adds the precombustion chamber and the flame nozzle at the front end of the conventional ignition burner, thereby overcoming three defects of the conventional ignition burner, leading the ignition device not to be influenced by high-temperature radiation heat and having long service life; the utility model discloses it is convenient to ignite the start-up, and ignition process safe and reliable ignites the success rate height, can regard as burning or gasification buggy nozzle to use after getting into operating condition.
Description
Technical Field
The utility model relates to an ignition nozzle, especially a multistage ignition nozzle suitable for fine coal burning or gasification equipment.
Background
The traditional equipment is ignited by an oil gun or a gas gun generally, the oil gun, an ignition device and an air channel are arranged on the equipment, flame is sprayed into the equipment under the action of combustion-supporting air after the oil gun is ignited by the ignition device, pulverized coal is sprayed into the equipment when the temperature in the equipment rises to a certain temperature, and the oil gun stops spraying oil after the equipment runs normally. The oil nozzle and the ignition device can only work below 300 ℃, so the ignition device needs to be cooled when the equipment normally works, a certain amount of normal temperature gas is generally introduced to achieve the purpose of cooling, oxygen participating in combustion or gasification reaction is also provided for the equipment, and the equipment has the function of a process nozzle, so the ignition device is generally called as an ignition nozzle on the common equipment.
Because the ignition burner is directly combusted in the equipment, the combustion is sufficient under the condition of reasonable air distribution and proper air-fuel ratio, the temperature of the equipment is increased rapidly, but the ignition burner also has the inevitable defects that:
firstly, the oil gun is firstly started to spray oil into the equipment in the traditional ignition, then the ignition device is started, the oil gun can be ignited only by forming atomization under certain pressure, once atomization cannot be formed, ignition failure can occur, the oil gun is configured to have a large oil spraying amount according to heat required by heating, and the oil gun cannot be ignited and needs to be thoroughly swept, if the sweeping is not in place or not swept, the secondary ignition and explosion are easily caused.
Secondly, the temperature in the equipment is 1300-1500 ℃ after normal reaction, so that the radiation heat of the ignition burner is very large, the temperature is also very high, in order to avoid strong high-temperature radiation, the ignition burner needs to be arranged at the back as much as possible, but the oil gun can spray oil to the wall of the burner due to too backward arrangement, and a large amount of oil drops are generated to cause insufficient combustion. The equipment is internally provided with a plurality of process burners which cannot reach an ideal flow field, so that the conventional ignition burners bear higher temperature, and the service lives of an oil nozzle and an ignition device are short.
And thirdly, because the arrangement of the ignition burner is closer to the front, the rotational flow strength is higher during working, after the pulverized coal and the gasifying agent are introduced, the ignition burner is easily broken in the pulverized coal ignition stage, and the ignition is often required to be re-ignited for many times in actual operation.
Finally, because the ignition burner needs to be used as a process burner after working normally, the gasifying agent sprayed into the equipment from the ignition burner is required to have a certain speed to participate in the reaction of the flow field. However, the ignition burner cannot be arranged too far forward, and oil of an oil gun cannot be sprayed on the wall of the burner to produce oil dripping, so that the ignition burner needs to have a large diameter, the fixed amount of gasification agent passing through the ignition burner with the large diameter is necessarily low in speed, and the reaction flow field of the whole equipment is influenced by the excessively low spraying speed, so that the defect is difficult to avoid.
In summary, the conventional ignition burner has the above unavoidable disadvantages, and it is necessary to develop a new multi-stage ignition burner for pulverized coal combustion or gasification equipment to solve the above problems in order to safely and smoothly perform the ignition of the equipment, to prolong the service life of the ignition device, and to meet the functional requirements of the process burner.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome the defect that above-mentioned prior art exists, provide a multistage ignition nozzle suitable for pulverized coal combustion or gasification equipment, make its ignition energy safe and reliable for a short time, the subassembly of igniteing does not receive the high temperature radiation heat to influence, and flame does not receive the inside flow field of equipment to influence, satisfies the requirement that the technology nozzle spouts the gasifying agent velocity of flow simultaneously.
Therefore, the utility model discloses a following technical scheme solves above-mentioned technical problem: a multi-stage ignition burner suitable for pulverized coal combustion or gasification equipment comprises a central air duct, wherein an ignition assembly is arranged at the center of the central air duct, the front end of the central air duct is connected with a precombustion chamber communicated with the inner cavity of the central air duct, the front end of the precombustion chamber is connected with a flame nozzle communicated with the inner cavity of the precombustion chamber, and the central air duct is a combustion-supporting air passage.
As further improvement and supplement to the above technical scheme, the utility model discloses take following technical measure:
the ignition assembly comprises a primary air sleeve, an oil gun, a liquefied gas burner and an ignition rod, wherein the oil gun, the liquefied gas burner and the ignition rod are installed in the primary air sleeve, and the ignition end of the ignition rod is located in the precombustion chamber.
When the ignition is carried out, the ignition rod is firstly utilized to ignite the liquefied gas burner, after the liquefied gas burner is ignited successfully and sprays out flame, when the flame detection assembly detects a flame signal, the oil gun is ignited, and the pulverized coal is ignited by the flame sprayed out after the oil gun is ignited successfully.
The utility model discloses set up the precombustion chamber before the ignition subassembly, flame nozzle is connected and communicates with each other with the furnace of gasifier, and oil gun spun oil and combustion-supporting wind are at the precombustion chamber intensive mixing to abundant burning makes combustion flame not receive the influence in the gasifier internal flow field, and the oil gun stops burning after gasifier intensification ignition succeeds simultaneously, has avoided the harm of radiant heat in the gasifier, has prolonged the life of oil gun and ignition stick. The high-temperature gas after full combustion in the precombustion chamber is sprayed out from the flame nozzle, and the high-temperature gas sprayed out from the flame nozzle is adopted for both heating of the gasification furnace and ignition of the pulverized coal.
The central air duct is provided with a flame stabilizing disc at the front ends of the liquefied gas burner and the ignition rod, and the oil gun is arranged on the flame stabilizing disc. Combustion-supporting air is introduced into the pre-combustion chamber through the central air duct, and the combustion-supporting air in the central air duct enters the pre-combustion chamber at a certain speed through the rotational flow of the flame stabilizing disc before entering the pre-combustion chamber, so that fuel sprayed by the oil gun is combusted more fully, and the flame is fuller and more stable.
The oil gun is a diesel oil gun, and the diesel oil gun is ignited by a liquefied gas burner.
The ignition rod is a high-pressure ignition needle.
The diameter of the precombustor is equal to the diameter of the central air duct.
The length of the precombustion chamber is 0.5-3 times of the diameter of the precombustion chamber.
The diameter of the flame nozzle is 1.2-4 times of the diameter of the precombustion chamber.
The length of the flame nozzle is 0.5-3 times of the diameter of the flame nozzle.
The diameter of the precombustion chamber needs to be determined according to the oil injection quantity and the injection angle of an oil gun, and the diameter of the flame nozzle needs to be determined according to the process requirements of equipment and the quantity of injected gasification agent.
To sum up, the utility model discloses the beneficial effect who has lies in: the utility model adds the precombustion chamber and the flame nozzle at the front end of the conventional ignition burner, thereby overcoming three defects of the conventional ignition burner, leading the ignition device not to be influenced by high-temperature radiation heat and having long service life; the flame is not influenced by the flow field in the gasification furnace, and the ignition is stable; meanwhile, the requirement of the flow velocity of the gasification agent sprayed by the process burner can be met, and the problem of equipment ignition is solved. The utility model discloses it is convenient to ignite the start-up, and ignition process safe and reliable ignites the success rate height, can regard as burning or gasification buggy nozzle to use after getting into operating condition.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a front view of fig. 1.
Detailed Description
The following provides a preferred embodiment of the present invention with reference to the accompanying drawings to explain the technical solutions of the present invention in detail.
The multi-stage ignition burner suitable for pulverized coal combustion or gasification equipment shown in fig. 1-2 comprises a central air duct 1, an ignition assembly 9, a flame stabilizing disc 5, a precombustion chamber 7 and a flame nozzle 8, wherein the front end of the central air duct 1 is connected with the precombustion chamber 7 communicated with the inner cavity of the central air duct, the front end of the precombustion chamber 7 is connected with the flame nozzle 8 communicated with the inner cavity of the precombustion chamber 7, and the central air duct 1 is a combustion-supporting air passage. The ignition assembly 9 consists of a primary air sleeve 2, an oil gun 6 and an ignition rod 3, wherein the oil gun 6 and the ignition rod 3 are arranged in the primary air sleeve 2, and the ignition end of the ignition rod 3 is positioned in the precombustion chamber 7.
The diameter D1 of the precombustion chamber 7 is the diameter D1 of the central air duct 1, and the length L1 of the precombustion chamber 7 is 0.5-3 times of the diameter D1; the diameter D2 of the flame nozzle 8 is 1.2-4 times of the diameter D1 of the precombustion chamber 7, and the length L2 of the flame nozzle 8 is 0.5-4 times of the diameter D2.
The oil gun is a diesel oil gun, and the embodiment adopts a compressed air atomization type diesel oil gun. Firstly, a liquefied gas burner is adopted to ignite the diesel oil gun. The present embodiment uses a high pressure ignition needle for ignition.
As shown in fig. 1, a flame stabilizing disc is installed at the front end of the central air duct 1, and the oil gun is installed on the flame stabilizing disc.
Atomized diesel oil sprayed by the oil gun and rotary air sprayed by the central air duct at a certain speed are fully mixed in the precombustion chamber and are combusted to generate high-temperature flue gas, and the high-temperature flue gas is sprayed into the equipment through the flame nozzle and is used for heating the furnace body and igniting pulverized coal. The diesel oil sprayed by the oil gun and the combustion-supporting air are fully mixed in the pre-combustion chamber and fully combusted, so that combustion flame is not influenced by a flow field rotating at a high speed in the gasification furnace at any time, the oil gun stops combusting after the gasification furnace is heated and ignited successfully, the oil gun and the ignition rod avoid the damage of radiant heat in the gasification furnace, and the service life of the oil gun and the ignition rod is prolonged. After the ignition of the equipment is finished, the ignition burner can continuously inject the pulverized coal and the gasifying agent inwards to play a role of a process burner, so that the ignition rod and the oil gun can be effectively protected.
The working process of the utility model is as follows: when in ignition, firstly, the fan is started, and combustion-supporting air is introduced into the central air duct 1; opening a switch of a liquefied gas cylinder, and introducing liquefied gas into a liquefied gas burner; the ignition rod 3 is communicated, the high-pressure ignition needle shoots sparks, and the liquefied gas is ignited. Starting a diesel pump, and starting an oil gun and atomizing compressed air after the oil pressure reaches a set value; the liquefied gas flame reignites the atomized diesel fuel and the flame begins to burn sufficiently smoothly in the prechamber 7. When the temperature of the gasification furnace rises to a certain temperature, the equipment starts to introduce the gasification agent and the fuel, the diesel pump is stopped when the temperature of the outlet of the equipment reaches a set value, the oil supply is stopped, the fan is continuously started to participate in the reaction of the flow field in the equipment, and the oil gun 6 and the ignition rod 3 are cooled.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a multistage ignition nozzle suitable for pulverized coal combustion or gasification equipment, includes central wind channel (1), its characterized in that, the center department in central wind channel (1) is equipped with an ignition subassembly (9), the front end of central wind channel (1) connect one rather than the communicating precombustion chamber of inner chamber (7), the front end of this precombustion chamber (7) connect one rather than the communicating flame nozzle (8) of inner chamber, central wind channel (1) be combustion-supporting wind passageway.
2. The multistage ignition burner suitable for pulverized coal combustion or gasification equipment as claimed in claim 1, wherein the ignition assembly (9) comprises a primary air sleeve (2), an oil gun (6), a liquefied gas burner (4) and an ignition rod (3), the oil gun (6), the liquefied gas burner (4) and the ignition rod (3) are installed in the primary air sleeve (2), and the ignition end of the ignition rod (3) is located in the precombustion chamber (7).
3. The multistage ignition burner suitable for pulverized coal combustion or gasification equipment as claimed in claim 2, wherein the central air duct (1) is provided with a flame stabilizing disc (5) at the front end of the liquefied gas burner (4) and the ignition rod (3), and the oil gun is arranged on the flame stabilizing disc (5).
4. The multistage ignition burner for pulverized coal combustion or gasification plants as claimed in claim 2 or 3, characterized in that the oil lance (6) is a diesel oil lance.
5. The multistage ignition burner for pulverized coal combustion or gasification equipment as claimed in claim 2 or 3, characterized in that the ignition rod (3) is a high-pressure ignition needle.
6. A multistage ignition burner for pulverized coal burning or gasification plants in accordance with claim 1, 2 or 3, characterized in that the diameter of the prechamber (7) is equal to the diameter of the central air duct (1).
7. A multistage ignition burner for pulverized coal combustion or gasification plants as in claim 1, 2 or 3, characterized in that the length of the prechamber (7) is 0.5-3 times its diameter.
8. The multistage ignition burner for pulverized coal combustion or gasification equipment as claimed in claim 1, 2 or 3, wherein the diameter of the flame nozzle (8) is 1.2 to 4 times the diameter of the precombustion chamber (7).
9. The multistage ignition burner for pulverized coal combustion or gasification equipment as claimed in claim 1, 2 or 3, wherein the length of the flame nozzle (8) is 0.5 to 3 times its diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221281704.7U CN217423232U (en) | 2022-05-25 | 2022-05-25 | Multi-stage ignition burner suitable for pulverized coal combustion or gasification equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221281704.7U CN217423232U (en) | 2022-05-25 | 2022-05-25 | Multi-stage ignition burner suitable for pulverized coal combustion or gasification equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217423232U true CN217423232U (en) | 2022-09-13 |
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ID=83190269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221281704.7U Active CN217423232U (en) | 2022-05-25 | 2022-05-25 | Multi-stage ignition burner suitable for pulverized coal combustion or gasification equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217423232U (en) |
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2022
- 2022-05-25 CN CN202221281704.7U patent/CN217423232U/en active Active
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