Efficient circulating combustion device

Abstract

An efficient circulating combustion device is provided with a plurality of sections of combustion inner container channels and a plurality of sections of circulating air channels, waste gas in a curing oven is sucked into a combustion inner container for sectional combustion, high-temperature gas is generated in the combustion inner container and then conveyed into the curing oven through a circulating fan for circulating heat supply, and the combustion inner container is divided into multiple sections of combustion inner containers matched with the multiple sections of circulating air channels. Waste gas in the curing oven is sucked into the combustion container to be fully combusted in a sectional mode, the waste gas can be supplemented for combustion supporting in each section of combustion, combustion is more sufficient, waste gas generated in the curing oven can be more easily and effectively removed, fuel of a combustion spray gun is saved, and the combustion efficiency is improved. The problems that when fuel is supplemented due to the fact that flames of the combustion inner container are fully combusted in the previous section of the combustion inner container and waste gas is lacked, the combustion flames are weakened when the flames enter the next section of the combustion inner container, and better combustion cannot be achieved are solved, the waste gas generated in the curing oven is continuously and circularly supplemented to different positions in the combustion inner container to be subjected to sectional efficient combustion, and the service life of the curing oven is prolonged. And the environmental protection property is better.

Description

Technical Field

[0001] The invention relates to a device furnace for generating combustible waste gas in other high-temperature heating furnaces in the field of spraying and curing treatment, and specifically is a high-efficiency circulating combustion device. Background Art

[0002] In the process of spraying (powder spraying, paint spraying, etc.) the workpiece in the automatic spraying production line, the sprayed workpiece needs to be cured in a high-temperature curing furnace, and the existing high-temperature curing furnace usually heats the gas in the combustion chamber and then transports it to the curing furnace for cyclic heating. It is necessary to maintain a suitable temperature of the curing furnace to cure the workpiece, and the coating produces a large amount of resin gas and solvent gas in the high-temperature curing process. These two major types of components are mixed in the high-temperature gas and will gradually increase with the operation of the curing furnace. The concentration of this type of gas will burn and even cause an explosion at a specific concentration and a specific furnace temperature if the concentration increases to a combustible concentration. In order to prevent such incidents from happening, the traditional practice is to discharge the hot air in the curing furnace to reduce the increase in the concentration of combustibles, which will result in a waste of heat energy and an impact on the ambient air. Therefore, the present invention adopts the method of burning combustible waste gas and high-temperature oxidation and decomposition of harmful substances in the combustion chamber to solve this problem. By setting several sections of combustion liner channels and several sections of circulating air ducts in the combustion liner, the combustible waste gas in the curing furnace can be sucked into the combustion liner for staged combustion, and then the circulating fan transports the high-temperature gas to the curing furnace for circulating heat supply, so that the waste gas with low concentration can be oxidized and burned together in the combustion liner, so that a large amount of gas that can be burned in a high-temperature flame will not be lost, such as combustible VOCs waste gas, etc. The lost gas will pollute the environment and needs to be collected and treated before being discharged. If resin and solvent gases can be burned in a high-temperature flame, the combustion calorific value can be increased and the emission of mixed gases can be reduced. By improving the circulating combustion structure of the combustion chamber and the combustion liner, the combustion efficiency and combustion heat can be improved, the emission of harmful gases can be reduced, the combustion raw materials can be saved and the emission of harmful substances can be reduced. This is very important and more conducive to production. Summary of the invention

[0003] In order to solve the problem that the heating gas in the existing combustion chamber is not fully burned, the combustion effect of the combustion chamber is not ideal, and the exhaust gas in the curing furnace cannot be efficiently sucked into the combustion chamber for combustion, resulting in a large amount of polluted exhaust gas loss, and the lost gas needs to be treated before discharge. The present invention provides a high-efficiency circulating combustion device. By arranging a combustion chamber to be divided into a multi-section combustion chamber and cooperating with a multi-section circulating air duct, hot air, combustible VOCs waste gas, etc. in a curing furnace and combustible mixed gas (i.e., waste gas) can be sucked into the combustion chamber for full and segmented combustion. The combustion of each section can be supplemented with the combustible mixed gas for combustion assistance, so the combustion is more complete, and it is easier and more effective to remove harmful waste gas generated in the curing furnace, thus saving fuel for a combustion spray gun and improving the combustion efficiency. This avoids the situation in which the flame of the combustion chamber is weakened when the fuel is supplemented because the flame has been fully burned in the previous section of the combustion chamber and lacks the combustible mixed gas, and the flame cannot burn better when entering the next section of the combustion chamber. This realizes continuous circulation to supplement the combustible mixed gas generated in the curing furnace to different positions in the combustion chamber for high-efficiency segmented combustion. The combustion of each section can be more complete and cleaner, thus avoiding the pollution of the environment by the loss of waste gas and better environmental protection.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a high-efficiency circulating combustion device, including a combustion chamber, a combustion liner, and a circulating fan. The combustion chamber is provided with a combustion liner and a circulating fan, and the air outlet channel of the circulating fan is connected to the curing furnace. The combustion liner is provided with a plurality of sections of combustion liner channels and a plurality of sections of circulating air ducts, which can suck the exhaust gas in the curing furnace into the combustion liner for staged combustion, and generate high-temperature flames and high-temperature gases in the combustion liner, which are then transported by the circulating fan to the curing furnace for circulating heat supply. The circulating fan continuously sucks the gas in the curing furnace from the circulating air duct into the combustion liner for combustion and heating, and then transports it to the curing furnace again for continuous circulation.

[0005] The combustion chamber includes a first combustion chamber that cooperates with a first circulation air duct. When the circulation fan is started to generate negative pressure in the combustion chamber, the gas can only enter the combustion chamber from the circulation air duct and then be output from the circulation fan in the combustion chamber. When the flame sprayed by the combustion spray gun is started to burn in the first combustion chamber, the combustible mixed gas in the curing furnace is sucked into the first combustion chamber from the first circulation air duct and ignited and burned. After combustion, a high-temperature flame is generated, and the mixed gas is reduced after being burned.

[0006] A second combustion tank is arranged at the rear end of the first combustion tank in the combustion tank to cooperate with the second circulation air duct, so that the mixed gas in the curing furnace is sucked from the second circulation air duct into the second combustion tank to be ignited and burned. The second circulation air duct replenishes the combustible mixed gas to the second combustion tank, so that the combustible mixed gas in the second combustion tank is replenished, burns more completely, and produces a more fierce flame, thereby solving the problem that the flame of the first combustion tank has been fully burned and lacks the combustible mixed gas to be replenished, so that the combustion flame is weakened when the flame enters the second combustion tank and cannot burn better.

[0007] A third combustion tank is arranged at the rear end of the second combustion tank in the combustion tank, and a third circulation air duct is arranged at the front end of the third combustion tank. The combustible mixed gas in the curing furnace is sucked into the third combustion tank from the third circulation air duct and ignited and burned. The third circulation air duct replenishes the combustible mixed gas in the third combustion tank, and the combustible mixed gas is burned in the third combustion tank, so as to solve the problem that the flame in the second combustion tank has been fully burned and lacks the combustible mixed gas to be replenished, so that the combustion flame is weakened when the flame enters the third combustion tank, and cannot burn better.

[0008] There is no limitation. For example, when used in a larger curing furnace, a fourth combustion liner can be provided in cooperation with a fourth circulation air duct, and the combustible mixture gas is sucked from the fourth circulation air duct into the fourth combustion liner and ignited and burned. Similarly, more combustion liner segments can be provided in sequence and used in cooperation with the circulation air duct to achieve segmented and sufficient combustion of the combustible mixture gas in the combustion liner.

[0009] A plurality of combustion inner tanks and a plurality of circulating air ducts are arranged in the combustion tank, which can sequentially suck the combustible mixed gas in the curing furnace into the combustion tank for segmented and full combustion. The combustion of each segment can be more complete, the combustion can be cleaner, and the heat generated can be more. It is also easier to effectively remove the harmful exhaust gas generated in the curing furnace, and the exhaust gas generated in the curing furnace is used as supplementary fuel for combustion-supporting combustion, which saves fuel for the combustion gun and improves the combustion efficiency. At the same time, more heat can be generated to supply the curing furnace, so that the product in the curing furnace can obtain a better curing temperature. The technical solution is designed to cooperate with a multi-stage combustion inner tank and a multi-stage circulating air duct, so as to realize the continuous circulation of the combustible mixed gas generated in the curing furnace to supplement the combustible mixed gas generated in the curing furnace to different positions in the combustion tank for segmented combustion. The combustion of each segment can be more complete, the combustion can be cleaner, and the combustion effect can be better. It can also avoid the loss of exhaust gas to pollute the environment, and the environmental protection is also better.

[0010] The first section combustion liner and the second section combustion liner of the combustion liner have a closing portion at the fire outlet end, that is, the fire outlet becomes narrower and smaller, so that the flame will be collected when it reaches the fire outlet position, generating a higher temperature flame and injection pressure, the burning flame is more fierce, the mixed gas can also be further fully burned, and the combustion effect is better.

[0011] The circulating air duct of the combustion chamber is provided with an air intake valve, and the size of the air intake opening of the circulating air duct can be adjusted by rotating the air intake valve, so that the air intake volume of the circulating air duct can be adjusted by rotating the air intake valve.

[0012] The combustion liner may be provided with a fire viewing portion, which can directly observe the burning state of the flame in each section of the inner liner of the combustion liner, and judge whether the combustion is sufficient by observing the flame color in each section of the inner liner of the combustion liner.

[0013] The combustion chamber is sealed. When the circulating fan is started, negative pressure is generated in the combustion chamber. The gas in the curing furnace can only enter the combustion chamber from a number of circulating air ducts and then enter the combustion chamber. The combustion spray gun sprays flames into the combustion chamber to burn the combustible waste gas in different sections of the combustion chamber, generating heat energy that is circulated and supplied to the curing furnace, which can form a better heat exchange, provide a stable curing temperature for the curing furnace, continuously generate heat that is circulated and supplied to the curing furnace to cure the workpiece, and can also avoid the loss of waste gas to pollute the environment.

[0014] The combustion spray gun is arranged at the outer end of the combustion chamber to spray combustion flames into the combustion chamber. The combustion spray gun is a combination of a gas pipe and a flame gun. The gas pipe transports fuel to the flame gun, and the flame gun sprays combustion to the center of the combustion chamber.

[0015] The rear end of the combustion chamber is provided with a baffle. The flame ejected from the combustion chamber spreads around after hitting the baffle, making the temperature inside the combustion chamber higher, generating more heat radiation and heat, and the combustion chamber forms a heat exchange chamber for hot air circulation. The rear end of the baffle is provided with a circulating fan, and the air inlet of the circulating fan is located at the rear end of the high-temperature baffle, which pumps the hot air flow (hot air) at the rear end of the combustion chamber into the curing furnace.

[0016] The driving motor of the circulating fan can be arranged outside the combustion chamber, and the rotating shaft of the driving motor passes through the wall of the combustion chamber and is connected to the impeller of the circulating fan. The driving motor rotates to control the rotation of the impeller to realize exhaust.

[0017] The combustion chamber may be provided with a first combustion chamber and a second combustion chamber made of refractory material, which may be any one of an asbestos chamber, a metal chamber, a graphene-coated high-temperature layer chamber, a ceramic chamber, etc. The combustion chamber may also be a single combustion chamber divided into multiple combustion chamber sections.

[0018] The combustion chamber is provided with a combustion chamber and a circulating fan, the air outlet channel of the circulating fan is connected in series with the curing furnace, the air inlet channel of the combustion chamber is connected in series with the curing furnace, the combustion chamber is provided with a plurality of sections of combustion chambers and a plurality of sections of circulating air ducts, the circulating air ducts can draw the mixed combustible waste gas entering the combustion chamber into the combustion chamber for staged combustion, the high-temperature flame and high-temperature gas generated in the combustion chamber are transported by the circulating fan to the curing furnace for circulating heat supply, and circulate continuously.

[0019] The combustion liner includes a plurality of combustion liner sections with successively increasing diameters, and a communicating circulation air duct is arranged between the connected combustion liner sections. The first combustion liner section of the combustion liner section is inserted into the front end of the second combustion liner section, and a plurality of air inlet grids are arranged at the front end of the first combustion liner section as the first circulation air duct, and a second circulation air duct is arranged between the first combustion liner section and the second combustion liner section; the second combustion liner section is inserted into the front end of the third combustion liner section, and a third circulation air duct is arranged between the second combustion liner section and the third combustion liner section; the end of the third combustion liner section is sealedly connected to the air inlet of the circulation fan.

[0020] When the circulation fan is started, negative pressure is generated in the combustion tank, and the gas is sucked into the first combustion tank from the first circulation duct for combustion, the gas from the second circulation duct is sucked into the second combustion tank for combustion, and the gas from the third circulation duct is sucked into the third combustion tank for combustion. The high-temperature gas after combustion is then transported to the curing furnace through the circulation fan.

[0021] The combustion spray gun is arranged at the front end of the combustion liner, and the fire outlet end of the combustion spray gun is inserted into the first section of the combustion liner to spray the combustion flame. When the flame sprayed by the start-up circulating fan and the start-up combustion gun burns in the first combustion liner, the combustible mixed gas with impurities in the curing furnace enters the combustion chamber from the air inlet channel, and is then sucked from the first circulating air duct into the first combustion liner to ignite and burn, and a high-temperature flame is produced after combustion, and the mixed gas is burned less; the second circulating air duct sucks the combustible mixed gas into the second combustion liner to supplement the combustion, and the flame in the second combustion liner is supplemented with the mixed gas, so that the flame can maintain more sufficient combustion, and a high-temperature flame is produced after combustion, and the mixed gas is burned less; the third circulating air duct sucks the combustible mixed gas into the third combustion liner to supplement the combustion, and the flame in the third combustion liner is supplemented with the mixed gas, so that the flame can maintain sufficient combustion, and a high-temperature flame is produced after combustion, and the mixed gas is burned less, and the heat generated by the combustion is then transported to the curing furnace through the circulating fan for circulating heat supply, and the circulating fan continuously sucks the combustible exhaust gas generated when the workpiece in the curing furnace is cured from the circulating air duct into the combustion liner for staged combustion and heating, and then transports it to the curing furnace again for continuous circulation.

[0022] Each section of the combustion liner connected to each other can be supported and connected by a support bone, and the support bone connects the multiple combustion liner into an integral combustion liner. It is not limited, and a baffle can be set in each section of the combustion liner, or only in the second section of the combustion liner and the third section of the combustion liner. When the jet flame hits the baffle, it will spread to the surroundings, and the mixed gas entering the circulating air duct can be ignited more fully.

[0023] An insert-connected combustion liner with a diameter that increases successively is provided to cooperate with the combustion liner to form a circulating air duct, so as to avoid the flame of the combustion liner being weakened when the flame enters the next combustion liner due to the lack of combustible mixed gas due to the flame being fully burned in the previous combustion liner when fuel is replenished, and the combustible mixed gas generated in the curing furnace is replenished to different positions in the combustion liner for segmented combustion, so that each section can burn more fully, burn cleaner, and have a better combustion effect, and can also avoid the loss of exhaust gas to pollute the environment, and the environmental protection is also better.

[0024] The combustion chamber may not be provided with a sealed top and air inlet channel, and the entire open top of the combustion chamber can be directly connected in series with the bottom of the curing furnace. When the circulating fan is started, negative pressure is generated in the combustion chamber, and the mixed gas in the combustion chamber can directly enter each section of the combustion chamber for combustion. Alternatively, the combustion chamber may not be required, and the entire combustion chamber equipped with a combustion spray gun and a circulating fan as a whole can be directly placed in the curing furnace. When the combustion spray gun and the circulating fan are started, the mixed gas in the curing furnace can directly enter the combustion chamber for combustion.

[0025] The combustion liner includes a plurality of sections of combustion liner with successively increasing diameters, interconnected circulating air ducts for replenishing a combustible mixed gas are arranged between the connected combustion liner, and the combustion liner is provided with a plurality of combustible mixed gas replenishing through holes, and the combustible mixed gas can enter the different sections of the combustion liner from the circulating air ducts and the through holes to replenish combustion.

[0026] The first section of the combustion liner is inserted into the front end of the second section of the combustion liner, and a plurality of air inlet grids are arranged at the front end of the first section of the combustion liner as a first circulation air duct, and a second circulation air duct is arranged between the first section of the combustion liner and the second section of the combustion liner, and the second section of the combustion liner also includes a plurality of through holes; the second section of the combustion liner is inserted into the front end of the third section of the combustion liner, and a third circulation air duct is arranged between the second section of the combustion liner and the third section of the combustion liner, and the third section of the combustion liner also includes a plurality of through holes; the end of the third section of the combustion liner is sealingly connected to the air inlet of the circulation fan.

[0027] An insert-connected combustion liner with a diameter that increases successively is provided, and a circulating air duct is formed between the combustion liner to supplement the combustible mixed gas to cooperate with the combustion of each section of the combustion liner, and a plurality of combustible mixed gas supplementing through holes are provided in the combustion liner, so that the combustible mixed gas can enter the different sections of the combustion liner from the circulating air duct and the through holes to assist combustion, and the combustible mixed gas generated in the curing furnace is continuously circulated to supplement the different positions in the combustion liner for segmented combustion, so that the combustion of each section can be more complete, the combustion is cleaner, the combustion effect is also higher, and the exhaust gas loss to pollute the environment can be avoided, the environmental protection is also better, and it can also avoid that the flame of the combustion liner has been fully burned in the previous section of the combustion liner, and the lack of combustible mixed gas. When the fuel is supplemented, the combustion flame will be weakened when the flame enters the next section of the combustion liner, and it cannot burn better.

[0028] The combustion liner is provided with two sections of combustion inner liner with successively increasing diameters, and interconnected combustible mixed gas supplementary circulation air ducts are provided between the connected combustion inner liner. A plurality of air inlet grids are provided at the front end of the first section of the combustion inner liner as the first circulation air duct, and a plurality of arranged combustible mixed gas supplementary through holes are provided at the second section of the combustion inner liner. The combustible mixed gas can enter the combustion inner liner from the circulation air duct and the through holes and burn, and the end of the second section of the combustion inner liner is sealingly connected to the air inlet of the circulation fan.

[0029] An insert-connected combustion liner with successively increasing diameters is provided, and a circulating air duct is formed between the combustion liner to supplement the combustible mixed gas to cooperate with the combustion of each section of the combustion liner, and a plurality of combustible mixed gas supplementing through holes are provided in the combustion liner, so that the combustible mixed gas can enter the different sections of the combustion liner from the circulating air duct and the through holes to assist combustion. After the circulating fan is started, the combustible mixed gas is continuously circulated to supplement the combustible mixed gas into the combustion liner for combustion, so that the combustion of each section can be more complete, the combustion is cleaner, the combustion effect is also higher, and the exhaust gas loss to pollute the environment can be avoided. In addition, the manufacturing process is relatively simple and easy to manufacture, with low cost and good effect.

[0030] The beneficial effects of the present invention are as follows: a highly efficient circulating combustion device is provided with a combustion chamber and a circulating fan, the combustion chamber is provided with a plurality of sections of combustion chamber channels and a plurality of sections of circulating air ducts, the waste gas in the curing furnace is sucked into the combustion chamber for staged combustion, a high-temperature flame and a high-temperature gas are generated in the combustion chamber, and then transported by the circulating fan to the curing furnace for circulating heat supply, and the circulation is continuous; the combustion chamber is divided into a multi-section combustion chamber and cooperates with a multi-section circulating air duct, which can suck the hot gas, combustible VOCs waste gas, etc. in the curing furnace, and the combustible mixed gas into the combustion chamber for staged full combustion, and each section of the combustion can obtain combustible The mixed gas supplements combustion, which makes the combustion more complete. It is easier and more effective to remove harmful exhaust gases generated in the curing furnace, save fuel for the combustion spray gun, improve combustion efficiency, and avoid the flame of the combustion tank being fully burned in the previous combustion tank and lacking combustible mixed gas. When the fuel is supplemented, the combustion flame will weaken when the flame enters the next combustion tank, and it cannot burn better. The combustible mixed gas generated in the curing furnace is continuously circulated to supplement different positions in the combustion tank for efficient segmented combustion. Each section can burn more completely and cleanly, avoiding exhaust gas leakage to pollute the environment, and is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] Figure 1 This is a view of a high-efficiency circulating combustion device used in conjunction with a curing oven; Figure 2 It is an exploded view of a high-efficiency circulating combustion device; Figure 3 It is a cross-sectional view of a high-efficiency circulating combustion device; Figure 4 It is a view that burns gall; Figure 5 is an exploded view of the second embodiment, a high-efficiency circulating combustion device used in conjunction with a curing furnace; Figure 6 is a cross-sectional view of a high-efficiency circulating combustion device in the second embodiment; Figure 7 is a view of a combustion chamber and a circulating fan of the second embodiment; Figure 8 is a view of a combustion chamber and a circulating fan of the third embodiment; Fig. 9 is a cross-sectional view of a high-efficiency circulating combustion device in the third embodiment; Fig.10 is a view of a combustion chamber and a circulation fan of a fourth embodiment; In the figure: 1, combustion chamber, 2, combustion liner, 3, air inlet channel, 4, combustion spray gun, 5, first section combustion liner, 6, curing furnace, 7, baffle, 8, circulation fan, 9, driving motor, 10, air outlet channel, 11, air intake valve, 12, fire viewing part, 30, first circulation air duct, 31, second circulation air duct, 32, third circulation air duct, 33, through hole, 51, second section combustion liner, 52, third section combustion liner, 53, closing part. DETAILED DESCRIPTION

[0033] exist Figure 1-4 In the illustrated embodiment, a high-efficiency circulating combustion device comprises a combustion chamber 1, a combustion liner 2, a combustion spray gun 4 and a circulating fan 8. The combustion chamber 1 is provided with a combustion liner 2 and a circulating fan 8. The air outlet channel 10 of the circulating fan 8 is connected in series with the curing furnace 6. The combustion liner 2 is provided with a plurality of sections of combustion inner liner channels and a plurality of sections of circulating air ducts, which can suck the mixed combustible exhaust gas in the curing furnace 6 into the combustion liner 2 for staged combustion. The high-temperature flame and high-temperature gas generated in the combustion liner 2 are then transported by the circulating fan 8 to the curing furnace 6 for circulating heat supply. The circulating fan 8 continuously sucks the gas in the curing furnace 6 from the circulating air duct into the combustion liner 2 for combustion and heating, and then transports it to the curing furnace 6 again for continuous circulation.

[0034] The combustion chamber 2 includes a first combustion chamber 5 which cooperates with a first circulation duct 30. When the circulation fan 8 is started to generate negative pressure in the combustion chamber 1, the gas can only enter the combustion chamber 2 from the circulation duct and then reach the circulation fan 8 of the combustion chamber 1 for output. When the flame sprayed by the combustion spray gun 4 is started to burn in the first combustion chamber 5, the combustible mixed gas with impurities in the curing furnace 6 is sucked into the first combustion chamber 5 from the first circulation duct 30 and ignited and burned. After combustion, a high-temperature flame is produced, and the mixed gas is burned and reduced. A second combustion liner 51 is arranged at the rear end of the first combustion liner 5 in the combustion liner 2 to cooperate with the second circulation duct 31, so that the mixed gas in the curing furnace 6 is sucked from the second circulation duct 31 into the second combustion liner 51 to be ignited and burned. The second circulation duct 31 replenishes the combustible mixed gas to the second combustion liner 51, so that the combustible mixed gas in the second combustion liner 51 is replenished, burns more completely, and produces a more fierce flame, thereby solving the problem that the flame of the first combustion liner has been fully burned and lacks the combustible mixed gas to be replenished, so that the combustion flame is weakened when the flame enters the second combustion liner and cannot burn better.

[0035] A third combustion liner 52 is arranged at the rear end of the second combustion liner 51 in the combustion liner 2, and a third circulation air duct 32 is arranged at the front end of the third combustion liner 52. The combustible mixed gas in the curing furnace 6 is sucked into the third combustion liner 52 from the third circulation air duct 32 and ignited and burned. The third circulation air duct 32 replenishes the combustible mixed gas in the third combustion liner 52, and the combustible mixed gas is burned in the third combustion liner, so as to solve the problem that the flame of the second combustion liner has been fully burned and lacks the combustible mixed gas to be replenished, so that the combustion flame is weakened when the flame enters the third combustion liner, and cannot burn better.

[0036] There is no limitation. For example, when used in a larger curing furnace, a fourth combustion liner can be provided in cooperation with a fourth circulation air duct, and the combustible mixture gas is sucked from the fourth circulation air duct into the fourth combustion liner and ignited and burned. Similarly, more combustion liner segments can be provided in sequence and used in cooperation with the circulation air duct to achieve segmented and sufficient combustion of the combustible mixture gas in the combustion liner.

[0037] There are multiple sections of combustion inner chambers in the combustion chamber 2, which cooperate with multiple sections of circulating air ducts. The combustible mixed gas in the curing furnace can be sucked into the combustion chamber 2 in sequence for full combustion in sections. The combustion of each section can be more complete, the combustion can be cleaner, the heat generated can be more, and it is easier to effectively remove the harmful exhaust gas generated in the curing furnace. The exhaust gas generated in the curing furnace 6 is used as a supplementary fuel for combustion, which saves fuel for the combustion gun, improves the combustion efficiency, and can generate more heat to supply the curing furnace 6, so that the product in the curing furnace 6 can get a better curing temperature. If one or more circulating air ducts are set at the front end of the combustion chamber, and the mixed gas in the curing furnace is sucked into the combustion chamber for combustion at the same time, without the combustible mixed gas supplemented in sections, the combustion in the combustion chamber 2 will be incomplete, the combustion efficiency will be low, the combustion effect will be poor, the energy consumption will be increased, and it will be difficult to improve the combustion efficiency and remove impurities in the mixed gas. The technical solution is designed to cooperate with a multi-stage combustion liner and a multi-stage circulating air duct to realize continuous circulation to replenish the combustible mixed gas generated in the curing furnace 6 to different positions in the combustion liner 2 for segmented combustion. The combustion of each section can be more complete, the combustion is cleaner, the combustion effect is higher, and the waste gas loss can be avoided to pollute the environment, and the environmental protection is also better.

[0038] The fire outlet ends of the first combustion liner 5 and the second combustion liner 51 of the combustion liner 2 are provided with a closing portion 53, that is, the fire outlet is narrowed and shrunk, so that the flame will be collected when it reaches the fire outlet position, generating a higher temperature flame and injection pressure, the burning flame is more fierce, the mixed gas can also be further fully burned, and the combustion effect is better.

[0039] The circulating air duct of the combustion chamber 2 is provided with an air intake valve 11. The size of the air intake opening of the circulating air duct can be adjusted by rotating the air intake valve 11, so that the air intake volume of the circulating air duct can be adjusted by rotating the air intake valve 11.

[0040] The combustion bladder 2 may be provided with a fire-viewing portion 12, which can directly observe the flame burning state in each section of the inner bladder of the combustion bladder 2. By observing the flame color in each section of the inner bladder of the combustion bladder 2, it can be judged whether the combustion is sufficient. For example: if it is observed that the flame in the combustion bladder 2 is red, with black smoke, and the combustion is not fierce, the air intake opening of the larger circulation air duct can be opened by adjusting the air intake valve 11, a large air intake volume can be adjusted, or the firepower of the combustion spray gun 4 can be adjusted to increase the coordination, the flame color in the bladder can be observed, and the appropriate air intake volume and combustion ratio can be controlled to achieve sufficient combustion. The fire-viewing portion 12 provided in the combustion bladder 2 can be a tubular observation port, and a sealed transparent glass can be installed inside the observation port to seal the observation port without affecting the line of sight. A detachable cover can be provided at the observation port to seal the tube hole, and the cover can be opened when the flame needs to be observed to observe the flame.

[0041] Yes, but it is not limited. The combustion chamber 1 is sealed. When the circulating fan 8 is started, a negative pressure is generated in the combustion chamber 1. The gas in the curing furnace 6 can only enter the combustion chamber 2 from a number of circulating air ducts and then enter the combustion chamber 1. The combustion spray gun 4 sprays flames into the combustion chamber 2 to burn the combustible waste gas in different sections of the combustion chamber 2, generating heat energy that is circulated and supplied to the curing furnace 6, which can form a better heat exchange, provide a stable curing temperature for the curing furnace 6, continuously generate heat and circulate it to the curing furnace 6 to cure the workpiece, and can also avoid the loss of waste gas to pollute the environment.

[0042] The combustion spray gun 4 is arranged at the outer end of the combustion chamber 1 to spray combustion flames into the combustion chamber 2. The combustion spray gun 4 is a combination of a gas pipe and a flame gun. The gas pipe transports fuel to the flame gun, and the flame gun sprays combustion to the center of the combustion chamber 2.

[0043] The rear end of the combustion chamber 2 is provided with a baffle 7. The flame ejected from the combustion chamber 2 spreads to the surroundings after hitting the baffle 7, making the temperature inside the combustion chamber 1 higher, generating more heat radiation and heat, and forming a heat exchange chamber for hot air circulation in the combustion chamber 1. The rear end of the baffle 7 is provided with a circulating fan 8. The air inlet of the circulating fan 8 is located at the rear end of the high-temperature baffle 7, and the hot air flow (hot air) at the rear end of the combustion chamber 1 is pumped into the curing furnace.

[0044] The driving motor 9 of the circulating fan 8 can be arranged outside the combustion chamber 1. The rotating shaft of the driving motor 9 passes through the wall of the combustion chamber 1 and is connected to the impeller of the circulating fan 8. The driving motor 9 rotates to control the rotation of the impeller to realize exhaust.

[0045] The combustion chamber 2 may be provided with a first combustion chamber 5 and a second combustion chamber 51 made of refractory material, which may be any one of an asbestos chamber, a metal chamber, a graphene-coated high-temperature layer chamber, a ceramic chamber, etc. The combustion chamber 2 may also be a single combustion chamber 2 with multiple combustion chamber sections.

[0046] exist Figure 5-7 In the second embodiment shown, a high-efficiency circulating combustion device is provided, wherein a combustion chamber 1 is provided with a combustion liner 2 and a circulating fan 8, wherein the air outlet channel 10 of the circulating fan 8 is connected in series with the curing furnace 6, and the air inlet channel 3 of the combustion chamber 1 is connected in series with the curing furnace 6, wherein the combustion liner 2 is provided with a plurality of sections of combustion inner liner and a plurality of sections of circulating air ducts, and the circulating air ducts can draw the mixed combustible exhaust gas entering the combustion chamber 1 into the combustion liner 2 for staged combustion, and the high-temperature flame and high-temperature gas generated in the combustion liner 2 are transported by the circulating fan 8 to the curing furnace 6 for circulating heat supply, and circulate continuously.

[0047] The combustion liner 2 includes a plurality of combustion liner sections with successively increasing diameters, and interconnected circulation ducts are arranged between the connected combustion liner sections. The first combustion liner section 5 of the combustion liner 2 is inserted into the front end of the second combustion liner section 51, and the front end of the first combustion liner section 5 is provided with a plurality of air inlet grids as the first circulation duct 30, and a second circulation duct 31 is arranged between the first combustion liner section 5 and the second combustion liner section 51; the second combustion liner section 51 is inserted into the front end of the third combustion liner section 52, and a third circulation duct 32 is arranged between the second combustion liner section 51 and the third combustion liner section 52; the end of the third combustion liner section 52 is sealedly connected to the air inlet of the circulation fan 8.

[0048] When the circulation fan 8 is started, negative pressure is generated in the combustion tank, and the gas is sucked into the first combustion tank 5 from the first circulation duct 30 for combustion, the gas from the second circulation duct 31 is sucked into the second combustion tank 51 for combustion, and the gas from the third circulation duct 32 is sucked into the third combustion tank 52 for combustion. The high-temperature gas after combustion is then transported to the curing furnace 6 through the circulation fan 8.

[0049] The combustion spray gun 4 is arranged at the front end of the combustion tank 2, and the ignition end of the combustion spray gun 4 is inserted into the first combustion tank 5 to spray the combustion flame. When the circulating fan 8 is started and the flame sprayed by the combustion spray gun 4 is started to burn in the first combustion tank 5, the combustible mixed gas with impurities in the curing furnace 6 enters the combustion chamber 1 from the air inlet channel 3, and is then sucked into the first combustion tank 5 from the first circulating air duct 30 to ignite and burn, and a high-temperature flame is produced after combustion, and the mixed gas is burned and reduced; the second circulating air duct 31 sucks the combustible mixed gas into the second combustion tank 51 to supplement the combustion, and the flame in the second combustion tank 51 is supplemented with the mixed gas, so that the flame can be kept burning more fully, and a high-temperature flame is produced after combustion, and the mixed gas is burned. The mixed gas is burned and reduced; the third circulating air duct 32 sucks the combustible mixed gas into the third combustion liner 52 to supplement the combustion. The flame in the third combustion liner 52 is supplemented by the mixed gas, so that the flame can maintain sufficient combustion, and a high-temperature flame is generated after combustion. The mixed gas is burned and reduced, and the heat generated by the combustion is then transported to the curing furnace 6 through the circulating fan 8 for circulating heat supply. The circulating fan 8 continuously sucks the combustible exhaust gas generated when the workpiece in the curing furnace 6 is cured from the circulating air duct into the combustion liner 2 for staged combustion and heating, and then transported to the curing furnace 6 again for continuous circulation.

[0050] Each section of the combustion liner 2 can be supported and connected by a support bone, and the support bone connects the multiple combustion liner into a whole combustion liner 2. It is not limited, and a baffle 7 can be set in each section of the combustion liner, or only in the second section of the combustion liner 51 and the third section of the combustion liner 52. When the jet flame hits the baffle 7, it will spread to the surroundings, and the mixed gas entering the circulating air duct can be more fully ignited.

[0051] An insert-connected combustion liner with a diameter that increases successively is provided to cooperate with the combustion liner to form a circulating air duct, so as to avoid the situation in which the flame of the combustion liner is weakened when the flame enters the next combustion liner due to the lack of combustible mixed gas due to the flame being fully burned in the previous combustion liner when the fuel is replenished, and the combustible mixed gas generated in the curing furnace 6 is replenished to different positions in the combustion liner 2 for segmented combustion, so that each section can burn more fully, burn cleaner, and have a better combustion effect, and can also avoid the loss of exhaust gas to pollute the environment, and the environmental protection is also better.

[0052] It is possible, but not limited to, that the combustion chamber 2 may be provided with a fire viewing portion 12 , and the fire viewing portion 12 can directly observe the flame combustion state in each section of the inner chamber of the combustion chamber 2 .

[0053] It is not limited. The combustion chamber 1 may not be provided with a sealed top and air inlet channel 3. The entire open top of the combustion chamber 1 can be directly connected in series with the bottom of the curing furnace 6. When the circulating fan 8 is started, negative pressure is generated in the combustion chamber 2, and the mixed gas in the combustion chamber 1 can directly enter each section of the combustion chamber for combustion. Or the combustion chamber 1 may not be needed, and the entire combustion chamber 2 equipped with the combustion spray gun 4 and the circulating fan 8 as a whole can be directly placed in the curing furnace 6. When the combustion spray gun 4 and the circulating fan 8 are started, the mixed gas in the curing furnace 6 can directly enter the combustion chamber 2 for combustion.

[0054] exist Figure 8-9 In the third embodiment shown, a high-efficiency circulating combustion device is provided, wherein the combustion vessel 2 includes a plurality of sections of combustion inner vessels with successively increasing diameters, interconnected combustion inner vessels are provided with interconnected circulating air ducts for replenishing combustible mixed gas, and the combustion inner vessel is provided with a plurality of combustible mixed gas replenishing through holes, and the combustible mixed gas can enter into different sections of the combustion inner vessel from the circulating air ducts and the through holes 33 to replenish combustion.

[0055] The first section combustion liner 5 of the combustion liner 2 is inserted into the front end of the second section combustion liner 51, and a plurality of air inlet grids are arranged at the front end of the first section combustion liner 5 as the first circulation air duct 30, and a second circulation air duct 31 is arranged between the first section combustion liner 5 and the second section combustion liner 51, and the second section combustion liner 51 also includes a plurality of through holes 33; the second section combustion liner 51 is inserted into the front end of the third section combustion liner 52, and a third circulation air duct 32 is arranged between the second section combustion liner 51 and the third section combustion liner 52, and the third section combustion liner 52 also includes a plurality of through holes 33; the end of the third section combustion liner 52 is sealingly connected to the air inlet of the circulation fan 8.

[0056] An insert-connected combustion liner with a diameter that increases successively is provided, and a circulating air duct is formed between the combustion liner to supplement the combustible mixed gas to cooperate with the combustion of each section of the combustion liner, and a plurality of combustible mixed gas supplementing through holes 33 are provided in the combustion liner, so that the combustible mixed gas can enter the different sections of the combustion liner from the circulating air duct and the through holes 33 to assist combustion, and the combustible mixed gas generated in the curing furnace 6 is continuously circulated to supplement the different positions in the combustion liner 2 for segmented combustion, so that the combustion of each section can be more complete, the combustion is cleaner, the combustion effect is better, and the exhaust gas loss to pollute the environment can be avoided, and the environmental protection is better, and it can also avoid that the flame of the combustion liner has been fully burned in the previous section of the combustion liner, and the lack of combustible mixed gas. When the fuel is supplemented, the combustion flame will be weakened when the flame enters the next section of the combustion liner, and it cannot burn better.

[0057] The combustion chamber 1 may not be provided with a sealed top, and the entire open top of the combustion chamber 1 can be directly connected to the bottom of the curing furnace 6 for installation, or the entire combustion chamber 2 equipped with the combustion spray gun 4 and the circulating fan 8 can be directly placed into the curing furnace 6. When the combustion spray gun 4 and the circulating fan 8 are started, the mixed gas in the curing furnace 6 can directly enter the combustion chamber 2 for combustion.

[0058] exist Fig.10 In the fourth embodiment shown, a high-efficiency circulating combustion device is provided, wherein the combustion vessel 2 includes two sections of combustion inner vessels with successively increasing diameters, and interconnected combustible mixture gas supplementary circulating air ducts are provided between the connected combustion inner vessels. A plurality of air inlet grids are provided at the front end of the first section of the combustion inner vessel 5 as the first circulating air duct 30, and a plurality of arranged combustible mixture gas supplementary through holes 33 are provided at the second section of the combustion inner vessel 51. The combustible mixture gas can enter the combustion inner vessel from the circulating air duct and the through holes 33 for combustion, and the end of the second section of the combustion inner vessel 51 is sealingly connected to the air inlet of the circulating fan 8.

[0059] An insert-connected combustion liner with successively increasing diameters is provided, and a circulating air duct is formed between the combustion liner to supplement the combustible mixed gas to cooperate with the combustion of each section of the combustion liner, and a plurality of combustible mixed gas supplementing through holes are provided in the combustion liner, so that the combustible mixed gas can enter the different sections of the combustion liner from the circulating air duct and the through hole 33 to assist combustion. After the circulating fan 8 is started, the combustible mixed gas is continuously circulated to supplement the combustion liner 2 for combustion, so that the combustion of each section can be more complete, the combustion is cleaner, the combustion effect is better, and the exhaust gas loss to pollute the environment can be avoided. In addition, the manufacturing process is relatively simple and easy to manufacture, with low cost and good effect.

Claims

1. A high-efficiency circulating combustion device, comprising a combustion chamber, a combustion liner, and a circulating fan, characterized in that: A combustion chamber and a circulating fan are arranged in the combustion chamber. The air outlet channel of the circulating fan is communicated with the curing furnace. The combustion chamber is provided with a plurality of sections of combustion chamber channels and a plurality of sections of circulating air ducts. The exhaust gas in the curing furnace can be sucked into the combustion chamber for staged combustion. High-temperature flames and high-temperature gases are generated in the combustion chamber, which are then transported to the curing furnace by the circulating fan for circulating heat supply. The circulating fan continuously sucks the gas in the curing furnace from the circulating air duct into the combustion chamber for combustion and heating, and then transports it to the curing furnace again for continuous circulation.

2. A high-efficiency circulating combustion device according to claim 1, characterized in that: The combustion chamber is provided with a first combustion chamber that cooperates with a first circulation air duct. When the circulation fan is started, negative pressure is generated in the combustion chamber, and the combustible mixed gas in the curing furnace is sucked from the first circulation air duct into the first combustion chamber to ignite and burn; the rear end of the first combustion chamber in the combustion chamber is provided with a second combustion chamber that cooperates with a second circulation air duct. The mixed gas in the curing furnace is sucked from the second circulation air duct into the second combustion chamber to ignite and burn, and the second circulation air duct replenishes the combustible mixed gas to the second combustion chamber.

3. A high-efficiency circulating combustion device according to claim 2, characterized in that: A third combustion liner is arranged at the rear end of the second combustion liner in the combustion liner, and a third circulation air duct is arranged at the front end of the third combustion liner. The combustible mixed gas in the curing furnace is sucked into the third combustion liner from the third circulation air duct to be ignited and burned. The third circulation air duct replenishes the combustible mixed gas in the third combustion liner.

4. A high-efficiency circulating combustion device according to claim 2 or 3, characterized in that: The first section combustion inner liner and the second section combustion inner liner of the combustion liner are provided with closing parts at the fire outlet ends.

5. A high-efficiency circulating combustion device according to claim 4, characterized in that: An air intake valve is arranged in the circulating air duct of the combustion chamber, and the size of the air intake opening of the circulating air duct can be adjusted by rotating the air intake valve.

6. The high-efficiency circulating combustion device according to claim 1, characterized in that: The combustion liner is provided with a plurality of sections of combustion liner with successively increasing diameters, and interconnected circulation air ducts are provided between the connected combustion liner. The first section of the combustion liner is inserted into the front end of the second section of the combustion liner, and a plurality of air inlet grids are provided at the front end of the first section of the combustion liner as the first circulation air duct, and a second circulation air duct is provided between the first section of the combustion liner and the second section of the combustion liner; the second section of the combustion liner is inserted into the front end of the third section of the combustion liner, and a third circulation air duct is provided between the second section of the combustion liner and the third section of the combustion liner; and the end of the third section of the combustion liner is sealingly connected to the air inlet of the circulation fan.

7. A high-efficiency circulating combustion device according to claim 6, characterized in that: The combustion inner vessels connected to the combustion vessels are supported and connected by support bones, and the support bones connect the multiple combustion inner vessels into an integral combustion vessel; a baffle is provided in each section of the combustion inner vessel, or a baffle is provided only in the second section of the combustion inner vessel and the third section of the combustion inner vessel, when the jet flame hits the baffle, it will spread to the surroundings, and can more fully ignite the mixed gas entering the circulating air duct.

8. The high-efficiency circulating combustion device according to claim 1, characterized in that: The first section of the combustion liner is inserted into the front end of the second section of the combustion liner, and a plurality of air inlet grids are arranged at the front end of the first section of the combustion liner as a first circulation air duct, and a second circulation air duct is arranged between the first section of the combustion liner and the second section of the combustion liner, and the second section of the combustion liner also includes a plurality of through holes; the second section of the combustion liner is inserted into the front end of the third section of the combustion liner, and a third circulation air duct is arranged between the second section of the combustion liner and the third section of the combustion liner, and the third section of the combustion liner also includes a plurality of through holes; the end of the third section of the combustion liner is sealingly connected to the air inlet of the circulation fan.

9. The high-efficiency circulating combustion device according to claim 1, characterized in that: The combustion liner is provided with two sections of combustion inner liner with successively increasing diameters, and interconnected combustible mixed gas supplementary circulation air ducts are provided between the connected combustion inner liner. A plurality of air inlet grids are provided at the front end of the first section of the combustion inner liner as the first circulation air duct, and a plurality of arranged combustible mixed gas supplementary through holes are provided at the second section of the combustion inner liner. The combustible mixed gas can enter the combustion inner liner from the circulation air duct and the through holes and burn, and the end of the second section of the combustion inner liner is sealingly connected to the air inlet of the circulation fan.

10. A high-efficiency circulating combustion device according to any one of claims 6 to 9, characterized in that: The combustion chamber is not provided with a sealed top and an air inlet channel, and the entire open top of the combustion chamber is directly connected in series with the bottom of the curing furnace. When the circulating fan is started, a negative pressure is generated in the combustion chamber, and the mixed gas in the combustion chamber can directly enter each section of the combustion chamber for combustion; or the entire combustion chamber equipped with a combustion spray gun and a circulating fan as a whole can be directly placed in the curing furnace, and the curing furnace is used as the combustion chamber. When the combustion spray gun and the circulating fan are started, the mixed gas in the curing furnace can directly enter the combustion chamber for combustion.

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