Burner for washing powder drying preparation process

Abstract

The present application relates to a burner for a washing powder drying preparation process, and relates to the technical field of burners. The burner provides the hot air required for the washing powder drying preparation. The burner includes a burner body, a feeding mechanism, and a tailings conveying mechanism. The feeding mechanism and the tailings conveying mechanism are respectively arranged at the inlet end and the outlet end of the burner body. The feeding mechanism conveys the external biomass powder fuel into the burner body, and the tailings conveying mechanism transports the residue after its combustion to the next process. The burner also includes a plurality of gas combustion chambers, and the plurality of gas combustion chambers are connected and arranged in sequence. One end of the plurality of gas combustion chambers is connected to one side of the burner body, and the other end of the plurality of gas combustion chambers outputs hot air through a high-temperature gate valve. The burner of the present application has the following effects: harmless combustion, relatively low combustion cost, and can provide more and continuous hot air for large-scale washing powder drying production enterprises.

Description

Technical Field

[0001] The present application relates to the technical field of biomass powder burners, and in particular to a burner used in a washing powder drying and preparation process. Background Art

[0002] At present, the preparation of washing powder drying usually requires hot air to dehydrate the washing powder into powder. The hot air required in the current technology is conventionally achieved by burning natural gas or electric heating. Electric heating may seem to be the most environmentally friendly in a washing powder production plant, but the manufacture of electricity itself will cause pollution. The consumption of electricity is a kind of energy consumption, and the power of electric heating equipment is relatively small. A single washing powder drying tower needs to be equipped with an electric heating equipment. The washing powder drying tower is divided into different specifications according to the production volume, such as 8M drying tower, 4M drying tower, etc. The higher the drying tower, the greater the power of the electric heating equipment required, so the higher the production cost. Production enterprises are also involved in the problems of high electricity prices and gradient electricity prices for industrial electricity. Burning natural gas is relatively environmentally friendly compared to the most traditional burning of coal, but natural gas combustion equipment, like electric heating equipment, has a series of problems extended by relatively small power. Washing powder drying towers are usually distributed in the factory area. For example, the installation of natural gas combustion equipment requires the laying of natural gas pipelines. Natural gas itself is flammable and explosive, and the washing powder drying tower contains washing powder powder. Natural gas and washing powder powder have explosion hazards. Furthermore, if the natural gas open flame is set at a position close to the washing powder drying tower, it has explosion hazards. If the natural gas open flame is set at a position far away from the washing powder drying tower, it will relatively bring more natural gas costs due to heat loss, and the hot air supply will also be relatively reduced, which is more in line with the small-scale hot air demand. At present, there are also some new fuels with very low prices on the market, such as biomass powder. For enterprises, the low fuel cost is very suitable for large-scale continuous combustion, thereby generating more and continuous hot air, but the disadvantage of biomass powder combustion is that it is easy to produce smoke and release some harmful gases. This is superimposed on the environmental risks of the washing powder production line itself, which can easily cause such enterprises to fall into the crisis of substandard environmental emissions.

[0003] In view of the above-mentioned related technologies, in the face of the large-scale washing powder drying tower required more and continuous hot air demand, there is an urgent need for a burner that has harmless combustion, relatively low combustion cost, and can provide more and continuous hot air for large-scale washing powder drying production enterprises. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a burner for a washing powder drying preparation process.

[0005] The present application provides a burner for a washing powder drying preparation process, which adopts the following technical solution:

[0006] A burner for a washing powder drying preparation process, the burner provides the hot air required for the washing powder drying preparation, the burner comprises a burner body, a feeding mechanism, and a tailings conveying mechanism, the feeding mechanism and the tailings conveying mechanism are respectively arranged at the inlet end and the outlet end of the burner body, the feeding mechanism conveys the external biomass powder fuel into the burner body, and the tailings conveying mechanism transports the residue after combustion to the next process, the burner also comprises a plurality of gas combustion chambers, the plurality of gas combustion chambers are connected and arranged in sequence, one end of the plurality of gas combustion chambers is connected to one side of the burner body, and the other end of the plurality of gas combustion chambers outputs hot air through a high-temperature gate valve.

[0007] By adopting the above technical solution, a combination of a burner body and multiple gas combustion chambers is adopted to achieve full combustion from biomass powder combustion to combustible gas, avoid the emission of harmful gases produced by biomass powder combustion, and reduce the environmental risks of washing powder drying production enterprises. The initial fuel of this technical solution is biomass powder, and the fuel cost is lower than that of natural gas, electricity, etc., which can better meet the needs of washing powder drying production enterprises for more and continuous hot air. The above three effects are produced by the same technical solution. Adjusting the opening degree of the high-temperature gate valve can adjust the negative pressure state in the burner body and multiple gas combustion chambers.

[0008] Optionally, the burner body includes a burner chamber, a fan, an air inlet valve, a conveyor belt, a residue trough, a combustible gas outlet, a conveying power equipment, a combustible gas exhaust assisting structure, a water cooling mechanism, a feed gate and a ash cleaning bin. The surrounding wall structure of the burner chamber is made of refractory bricks, and the outside of the refractory bricks is evenly wrapped with thermal insulation material. A metal shell is arranged on the outside of the thermal insulation material. The fan is arranged on a side of the burner body away from the gas combustion chamber, and two air inlets are respectively provided on a side of the burner body close to the fan, each air inlet corresponds to an air inlet valve, and the fan is connected to the two air inlet valves through parallel air ducts. The conveyor belt is horizontally arranged in the burner chamber, one end of the conveyor belt corresponds to the feed of the feeding mechanism, and the other end of the conveyor belt corresponds to the tailings conveying mechanism. A residue trough is arranged at one end of the burner chamber close to the tailings conveying mechanism, and the length direction of the residue trough is parallel to the width direction of the conveyor belt, and the residue trough is arranged at one end of the conveyor belt At the end, the vertical bottom of the residue trough is connected to the tailings conveying mechanism, the combustible gas port is opened on the side of the burner chamber close to the gas combustion chamber, the burner chamber conveys the combustible gas to the gas combustion chamber through the combustible gas port, the combustible gas exhaust auxiliary structure is arranged at the top of the burner chamber, the combustible gas port and the combustible gas exhaust auxiliary structure are arranged in sequence in the conveying direction of the conveyor belt, and a feed gate is also provided at the inlet end of the burner body, which is cooled by a water cooling mechanism inside the feed gate. The feed gate controls the discharge amount and speed of the feeding mechanism to the conveyor belt, and adjusts the thickness of the fuel spread on the conveyor belt. The burner body is also provided with a pressure sensor and a temperature sensor for detection, and a cleaning bin is arranged on one end of the burner body close to the feeding mechanism, the cleaning bin is connected to the burner chamber, the conveyor belt extends into the cleaning bin, and is connected to the conveying power equipment through a reducer and a transmission shaft in the cleaning bin, and the conveying power equipment is arranged on the side of the burner body away from the gas combustion chamber.

[0009] By adopting the above technical solution, the surrounding wall structure of the burner chamber can provide sufficient insulation for the combustion of biomass powder in the burner body, stabilize the internal combustion temperature, and optimize the combustion effect. Another function is to provide sufficient temperature for the combustible gas after combustion to ensure the full combustion of the combustible gas in the gas combustion chamber. Another function is to provide sufficient temperature for the hot air discharged from the gas combustion chamber. The cooperation between the fan and the air inlet valve is to ensure that there is sufficient oxygen for fuel combustion and the sufficiency of fuel combustion. The function of the air inlet valve is to adjust the air intake volume and then control the combustion temperature in the burner chamber. The position design of the two air inlet valves is to adjust the position where the fuel combustion is completed on the conveyor belt, that is, to ensure that the fuel combustion process on the conveyor belt is completed before the combustible gas exhaust structure, so that the combustible gas can enter the gas combustion chamber well. The horizontally arranged conveyor belt is transported from the inlet end to the outlet end, that is, the biomass powder fuel entering is burned flat on the conveyor belt. The uniform speed of the conveyor belt slowly displaces the burning fuel from the inlet end, and the combustible gas generated by the combustion enters the gas combustion chamber smoothly through the combustible gas port under the action of negative pressure. The overall structure and setting position of the combustible gas exhaust auxiliary structure are to form a solid obstacle behind the combustible gas outlet so that all combustible gases can be discharged through the combustible gas outlet. A feed gate is also added to the inlet end of the burner body. The opening and closing degree of the feed gate can well adjust the paving thickness of the biomass powder on the conveyor belt, ensuring the completeness of combustion while maintaining a good temperature and the position where the combustion is completed. The cold water inside the feed gate can well cool the side of the feed gate facing the burner chamber, extending the service life of the feed gate. The addition of a cleaning bin can facilitate the cleaning of the conveyor belt and the observation of one end of the conveyor belt. The conveyor belt extends into the cleaning bin and is connected to the conveying power equipment through a reducer and a drive shaft in the cleaning bin, which can provide a sufficient non-combustion area for the conveyor belt, facilitate the cooling of the conveyor belt, and protect the connection between the conveyor belt and the reducer, drive shaft, etc.

[0010] Optionally, the combustible gas exhaust-aiding structure includes a front arch, a middle arch and a rear arch, which are arranged in sequence in the conveying direction of the conveyor belt. The front arch, the middle arch and the rear arch all start to rise from the same side wall of the combustible gas outlet in the burner chamber along the top of the burner chamber. The height of the middle arch is higher than the front arch, and the height of the rear arch is higher than the middle arch.

[0011] By adopting the above technical solution, the heights of the front arch, the middle arch and the rear arch are set to form a barrier that becomes lower as it approaches the outlet end, thereby effectively blocking the combustible gas from reaching the outlet end of the burner body.

[0012] Optionally, the two air inlets are arranged in sequence in the conveying direction of the conveyor belt, one of the air inlets is close to the feeding end of the conveyor belt and in front of the position of the conveyor belt corresponding to the combustible gas outlet, and the other air inlet is close to the slag discharge end of the conveyor belt and corresponds to the position of the combustible gas exhaust structure.

[0013] By adopting the above technical solution, the two air inlets are respectively arranged at the feeding end and the slag discharge end of the conveyor belt, and the air inlet of the air inlet is used to adjust the temperature in the burner body, to adjust the air pressure at the front and rear ends of the burner body, and to supply the air required for combustion in the burner body to ensure the full combustion of the biomass powder in the burner body. It avoids the situation such as smoke coming out from one end caused by the uneven air pressure at the front and rear ends of the gas combustion chamber.

[0014] Optionally, the feeding mechanism includes a feeding bin, a feeding elevator, a feeding observation platform and a feed port. The feeding observation platform is arranged at the top of the burner body and close to the end of the inlet end. The feeding bin and the feeding elevator are arranged side by side at the inlet end. The position of the feeding observation platform corresponds to the position of the feeding bin. The top of the feeding bin is open and the feed port is connected to the bottom of the feeding bin, so the length of the feed port matches the width of the conveyor belt. The opening and closing of the feed gate adjusts the feeding speed of the feed port to the conveyor belt.

[0015] By adopting the above technical solution, the top of the loading bin receives the fuel sent by the loading elevator, and the bottom of the loading bin delivers the fuel to the feed port. The width of the feed port is designed to make the fuel evenly spread on the conveyor belt. The feed gate adjusts the opening and closing of the feed port, thereby adjusting the amount and speed of the discharge, and finally adjusting the thickness of the flattening on the conveyor belt in coordination with the conveying displacement of the conveyor belt. The loading observation platform can facilitate the operation of the loading elevator in the loading bin, and can also timely and intuitively observe the condition of the fuel in the loading bin, whether there are foreign objects, humidity, etc.

[0016] Optionally, a gap is provided between the two ends of the width of the conveyor belt and the inner wall of the burner chamber, and the gap width is 6-15mm. A through hole is opened on the side wall of the outlet end of the burner body. There are two through holes, and the two through holes are arranged on the same horizontal plane. The two through holes are arranged at both ends in the width direction of the conveyor belt. The horizontal plane where the two through holes are located is higher than the horizontal plane where the conveyor belt is located and lower than the lowest point of the combustible gas exhaust structure. A closed door is hinged on the through hole, and a guard plate is added in the gap between the conveyor belt and the inner wall of the burner chamber. The guard plate has a hollow structure, is connected to the water cooling mechanism, and the length of the guard plate matches the length of the conveyor belt.

[0017] By adopting the above technical solution, the gap between the conveyor belt and the inner wall of the burner chamber can effectively protect the life of the refractory bricks in the inner wall of the burner chamber and avoid local overtemperature in the entire brick structure. The number of openings and the design of the corresponding positions can intuitively observe whether the conveyor belt is arched, whether the burning fuel is transported horizontally, whether the conveyor belt is deviated, whether the combustion position on the conveyor belt is within the predetermined range, and the color of the burning flame can also be observed, so that the naked eye can intuitively judge the sufficiency of the combustion of biomass powder. The guard plate that passes cold water can block the flame on the conveyor belt and provide protection for the transmission chain, transmission shaft and other structures on both sides of the width of the conveyor belt.

[0018] Optionally, the tailings conveying mechanism includes a slag bucket, a slag discharger and a slag pit. Water is added to the slag discharger, and the amount of water added does not exceed the inspection hole of the slag discharger. The slag discharger is linked to the conveyor belt, the bottom end of the residue trough is fixedly connected to the top of the slag bucket, the bottom of the slag bucket is sealed to the slag discharger, and a slag pit is arranged vertically below the end of the slag discharger away from the slag bucket. The slag pit is used to receive the water brought out by the slag discharger during the conveying process.

[0019] By adopting the above technical scheme, the bottom of the slag bucket is sealed and connected to the slag discharger, and water is added to the slag discharger, so that a water seal with a certain liquid level height can be formed inside the slag bucket. The main function of the water seal is to ensure the negative pressure environment inside the burner body. It is also to soak the residue to avoid unnecessary dust. Furthermore, it is to cool the residue in time to avoid damage to the slag discharger due to its high temperature.

[0020] Optionally, multiple gas combustion chambers burn independently, and a gas through hole is opened on the partition wall between two adjacent gas combustion chambers. The gas through holes between the multiple gas combustion chambers are arranged in a non-linear manner, and are arranged in a staggered manner.

[0021] By adopting the above technical solution, the burner body and multiple gas combustion chambers are connected in series to form a negative pressure combustion channel, so that the combustible gas generated by the burner body can be fully burned in the multiple gas combustion chambers connected in series, thereby achieving the purpose of harmless combustion. The staggered gas through holes between the gas combustion chambers increase the residence time of the combustible gas in a single gas combustion chamber, thereby greatly increasing the combustion time of the combustible gas in the gas combustion chamber and maximizing the full combustion.

[0022] Optionally, the plurality of gas combustion chambers are all made of refractory bricks, the outside of the refractory bricks is evenly wrapped with insulation material, a metal shell is arranged outside the insulation material, and a door for cleaning and maintenance is opened on one of the side walls of a single gas combustion chamber.

[0023] By adopting the above technical solution, refractory bricks can resist high temperatures to the maximum extent and have good thermal insulation performance, which can provide the conditions required for the full combustion of combustible gas. While the thermal insulation material keeps warm, it can effectively prevent heat loss caused by thermal radiation. The interior of the gas combustion chamber needs to be cleaned of soot and coke regularly to ensure the adequacy of the next combustion.

[0024] Optionally, a mixing chamber is provided at the hot air outlet end of the gas combustion chamber, and a high-temperature gate valve regulates the channel opening of the gas combustion chamber and the mixing chamber. A hot air main pipe is provided at the top of the mixing chamber, and a chimney and a hot air delivery pipe are connected to the hot air main pipe in parallel. The hot air delivery pipe is connected to the washing powder drying preparation production line, and a vent valve is provided on the chimney. The side wall of the mixing chamber is connected to a temperature regulating air duct, and an air supply fan and a cold air regulating valve are provided on the temperature regulating air duct. A temperature sensor and a pressure sensor are provided in the mixing chamber.

[0025] By adopting the above technical solution, the function of the mixing chamber is to adjust the temperature of the hot air (air supply fan and cold air regulating valve). The hot air main pipe is used to discharge excess hot air (chimney) and to transport the required hot air to the downstream (hot air delivery pipe). It can also adjust the negative pressure environment of the entire combustion (vent valve). The temperature sensor and pressure sensor are used to detect the pressure and temperature in the mixing chamber to properly maintain the negative pressure environment and appropriate temperature.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] The technical solution of the present application can enable low-priced biomass powder to be used in washing powder production enterprises, and the harmless combustion of biomass powder can be achieved through the combustion of fuel and the full combustion of combustible gas, thereby reducing the environmental risks brought by biomass powder to washing powder production enterprises, and the combustion cost is low. By burning in a negative pressure environment, the air supply volume and air pressure at the inlet and outlet ends of the burner body are controlled to achieve relatively smokeless combustion of the burner body. All combustible smoke generated by the combustion enters multiple gas combustion chambers connected in series for full combustion, and finally achieves harmless combustion emissions. Through large-scale continuous combustion on the conveyor belt, a steady stream of combustible gas can be produced for the gas combustion chamber. After combustion in multiple gas combustion chambers connected in series, relatively more and continuous hot air is produced to meet the drying needs of large-scale washing powder production enterprises.

[0028] The design of the water seal at the slag discharge point on the burner body, the design of the air inlet on the burner body, the design of the vent valve on the mixing chamber, and the air supply fan on the mixing chamber are all for maintaining the negative pressure environment during the entire combustion process, so that there is no overflow of combustion smoke in the combustion channel composed of the burner body and multiple gas combustion chambers, and the combustion is fully effective, ultimately achieving smokeless and harmless biomass powder.

[0029] The pressure sensors and temperature sensors installed in the burner body and the mixing chamber are to provide reference values ​​for the negative pressure so as to adjust the pressure and maintain a stable negative pressure environment.

[0030] All relevant designs of the conveyor belt are mainly to spread the fuel well, translate the burning fuel, maintain the continuity of combustion, and output more and continuous combustible gas.

[0031] The positions of the two air outlets and the conveyor belt, the air volume control, and the relative position with the combustible gas exhaust-aiding structure, and the combustible gas exhaust-aiding structure are designed to achieve combustion of the fuel in the space between the front end of the conveyor belt and the combustible gas exhaust-aiding structure, so that the combustible gas produced by the combustion can enter the gas combustion chamber as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The utility model is a schematic diagram of the overall structure of a burner used in a washing powder drying preparation process.

[0033] Figure 2 It is a cross-sectional view of the burner body from one side.

[0034] Figure 3 It is a cross-sectional view of the other side of the burner body.

[0035] Figure 4 The present invention is a cross-sectional view in the length direction of a burner used in a washing powder drying preparation process.

[0036] Explanation of the reference numerals: 1. Burner body; 2. Gas combustion chamber; 3. Fan; 4. Conveyor belt; 5. Combustible gas outlet; 6. Feed gate; 7. Ash cleaning bin; 8. Air inlet; 9. Residue trough; 10. Conveying power equipment; 11. Front arch; 12. Middle arch; 13. Rear arch; 14. Loading bin; 15. Loading observation platform; 16. Closed door; 17. Slag hopper; 18. Gas through hole; 19. Mixing chamber; 20. Hot air main pipe; 21. Chimney; 22. Hot air delivery pipe; 23. Air supply fan; 24. Temperature-adjusting air duct; 25. Guard plate; 26. Ash cleaning port; 27. First observation port; 28. Second observation port; 29. ​​Isolation arch. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0038] The embodiment of the present application discloses a burner for a washing powder drying preparation process.

[0039] Reference Figure 1, a burner for a washing powder drying preparation process, the burner provides the hot air required for the washing powder drying preparation, the burner includes a burner body 1, a feeding mechanism, and a tailings conveying mechanism, the feeding mechanism and the tailings conveying mechanism are respectively arranged at the inlet end and the outlet end of the burner body 1, the feeding mechanism conveys the biomass powder fuel outside it into the burner body 1, and the tailings conveying mechanism transports the residue after its combustion to the next process (the next process here refers to the slag pile or the residue collection box or the residue removal vehicle, etc.), the burner also includes a plurality of gas combustion chambers 2, and the plurality of gas combustion chambers 2 are connected and arranged in sequence. Five gas combustion chambers 2 are shown in the figure of this application, and other numbers of multiple gas combustion chambers 2 can be set according to different fuel types. One end of the plurality of gas combustion chambers 2 is connected to one side of the burner body 1, and the other end of the plurality of gas combustion chambers 2 outputs hot air. Here, the plurality of gas combustion chambers 2 connected and arranged in sequence are regarded as a whole, and "one end of the plurality of gas combustion chambers 2" refers to the inlet end of the combustible gas of the first gas combustion chamber 2, and "the other end of the plurality of gas combustion chambers 2" refers to the outlet end of the combustible gas of the fifth gas combustion chamber 2. The burner of the present application overcomes the shortcomings of some previous combustion methods, such as large smoke, large temperature fluctuations, and high labor intensity. Through the whole process control of negative pressure, smokeless combustion is achieved. The combination of the burner body 1 and multiple gas combustion chambers 2 achieves full combustion of biomass powder and combustible gas, and the combustion is harmless. In addition to being suitable for the combustion of biomass powder, the burner of the present application can also be suitable for other forms of biomass powder, such as long strips, cylindrical and other large particles.

[0040] like Figure 2As shown, the burner body 1 includes a burner chamber, a fan 3, an air inlet valve, a conveyor belt 4, a residue trough 9, a combustible gas port 5, a conveying power device 10, a combustible gas exhaust assisting structure, a water cooling mechanism, a feed gate 6 and a ash cleaning bin 7. The surrounding wall structure of the burner chamber is made of refractory bricks, and the bottom and top surfaces of the burner chamber are also made of refractory bricks. The outside of the refractory bricks is evenly wrapped with insulation material, and a metal shell is arranged on the outside of the insulation material. The fan 3 is arranged on the side of the burner body 1 away from the gas combustion chamber, and two air inlets 8 are respectively opened on the side of the burner body 1 close to the fan 3. An air inlet valve is corresponding to each air inlet 8. The fan 3 is connected to the two air inlet valves respectively through parallel air ducts. The conveyor belt 4 is horizontally arranged in the burner chamber, and one end of the conveyor belt 4 corresponds to the feed of the feeding mechanism. The other end of the conveyor belt 4 corresponds to the tailings conveying mechanism. A residue trough 9 is arranged at one end of the burner chamber close to the tailings conveying mechanism. The length direction of the residue trough 9 is parallel to the width direction of the conveyor belt 4. The residue trough 9 is arranged at one end of the conveyor belt 4. The vertical bottom of the residue trough 9 is connected to the tailings conveying mechanism. A combustible gas port 5 is opened on one side of the burner chamber close to the gas combustion chamber 2. The burner chamber conveys the combustible gas to the gas combustion chamber 2 through the combustible gas port 5. The combustible gas exhaust-aiding structure is arranged at the top of the burner chamber. The combustible gas port 5 and the combustible gas exhaust-aiding structure are arranged in sequence in the conveying direction of the conveyor belt 4. A feed gate 6 is also provided at the inlet end of the burner body 1. The feed gate 6 is cooled by a water cooling mechanism. The feed gate 6 controls the discharge amount and speed of the feeding mechanism to the conveyor belt 4, and adjusts the thickness of the fuel spread on the conveyor belt 4. The burner body 1 is also provided with a pressure sensor and a temperature sensor for detection. The ash cleaning bin 7 is arranged on one end of the burner body 1 close to the feeding mechanism. The ash cleaning bin 7 is communicated with the burner chamber. The conveyor belt 4 extends into the ash cleaning bin 7 and is connected to the conveying power device 10 in the ash cleaning bin 7 through a reducer and a transmission shaft. The conveying power device 10 is arranged on the side of the burner body 1 away from the gas combustion chamber. The conveying power device 10 refers to a motor, etc. The specific action of the feed gate 6 is driven by the adjusting screw. The ash cleaning bin 7 is provided with a plurality of ash cleaning ports 26, a plurality of first observation ports 27, and a plurality of second observation ports 28. The plurality of ash cleaning ports 26 are arranged in parallel at the vertical bottom of one of the sides of the ash cleaning bin 7. The fuel particles, slag ash, etc. dropped on the conveyor belt 4 are cleaned through the ash cleaning ports 26. The plurality of ash cleaning ports 26 are evenly distributed side by side in the width direction of the conveyor belt 4. Multiple first observation ports 27 and the cleaning ports 26 are arranged on the same side of the cleaning bin 7. Multiple first observation ports 27 are arranged side by side for observing whether the conveyor belt 4 is offset, etc. Multiple second observation ports 28 are evenly distributed side by side on the top of the cleaning bin 7 for observing the situation above the conveyor belt 4.The front and rear rotating shafts of the conveyor belt 4 are driven by chains. The two chains are respectively located on both sides of the width of the burner chamber. A guard plate 25 is provided on the outside of the chain. The guard plate 25 is used to isolate the flame of fuel combustion. The guard plate 25 is a hollow structure. Cold water is passed into the guard plate 25 to achieve the purpose of protecting the chain by the guard plate 25. An isolation arch 29 is also provided inside the burner chamber. The isolation arch 29 is arranged between the feed port and the combustible gas port 5. The isolation arch 29 is fixedly connected to the top of the burner chamber. The isolation arch 29 is made of refractory bricks.

[0041] like Figure 2 , 3 As shown, the combustible gas exhaust assisting structure includes a front arch 11, a middle arch 12 and a rear arch 13, which are arranged in sequence in the conveying direction of the conveyor belt 4. The front arch 11, the middle arch 12 and the rear arch 13 all start to arch from the same side wall of the combustible gas passage 5 in the burner chamber along the top of the burner chamber. The arch height of the middle arch 12 is higher than that of the front arch 11, and the arch height of the rear arch 13 is higher than that of the middle arch 12. The front arch 11, the middle arch 12 and the rear arch 13 are all made of refractory bricks. There is no gap between the front arch 11 and the middle arch 12, and between the middle arch 12 and the rear arch 13.

[0042] like Figure 2 As shown, the two air inlets 8 are sequentially arranged in the conveying direction of the conveyor belt 4, one of which is close to the feed end of the conveyor belt 4 and in front of the conveying position of the combustible gas port 5 corresponding to the conveyor belt 4, and the other is close to the slag discharge end of the conveyor belt 4 and corresponds to the position of the combustible gas exhaust structure. The two air inlets 8 are arranged on the same horizontal plane, the horizontal plane where the two air inlets 8 are located is higher than the horizontal plane where the upper surface of the conveyor belt 4 is located, and the position of the air inlet 8 close to the slag discharge end of the conveyor belt 4 is lower than the lowest point of the combustible gas exhaust structure. In this way, it is ensured that the air inlet 8 is smooth, unobstructed, and effective, and the air inlet is above the upper surface of the conveyor belt 4. The air inlet 8 close to the feed end of the conveyor belt 4 can well adjust the negative pressure at the feed end of the conveyor belt 4 and the degree of combustion at the feed end of the conveyor belt 4. Similarly, the air inlet 8 at the slag discharge end of the conveyor belt 4 can well adjust the negative pressure at the slag discharge end of the conveyor belt 4 and the degree of combustion at the slag discharge end of the conveyor belt 4. Finally, the combustion is achieved in the combustion area of ​​the conveyor belt 4 , that is, between the separating arch 29 and the front arch 11 of the conveyor belt 4 .

[0043] like Figure 1 , 2As shown, the feeding mechanism includes a feeding bin 14, a feeding elevator, a feeding observation platform 15 and a feeding port. The feeding observation platform 15 is arranged at the top of the burner body 1 and close to the end of the inlet end. The feeding bin 14 and the feeding elevator are arranged side by side at the inlet end. The position of the feeding observation platform 15 corresponds to the position of the feeding bin 14. The top of the feeding bin 14 is an opening, and the bottom of the feeding bin 14 is connected to the feeding port, so the length of the feeding port matches the width of the conveyor belt 4. The opening and closing degree of the feeding gate 6 adjusts the feeding speed of the feeding port to the conveyor belt 4. The discharge of the feeding gate 6 cooperates with the operation of the conveyor belt 4 to regulate the stacking thickness of the biomass powder fuel, thereby ensuring the adequacy of the combustion. The feeding elevator adopts the design of an electric hoist plus a hook. The upper end of the electric hoist realizes the horizontal displacement of the biomass powder fuel through a horizontal guide rail, and then moves from the stacking area to the feeding port. The fuel situation in the feeding bin 14 can be easily observed through the feeding observation platform 15.

[0044] like Figure 2 , 3 As shown, there is a gap between the two ends of the width of the conveyor belt 4 and the inner wall of the burner chamber, and the gap width is 6-15mm. The burner body 1 is provided with two openings on the side wall of the outlet end, and the two openings are arranged on the same horizontal plane. The two openings are arranged at both ends of the width direction of the conveyor belt 4, and the horizontal plane where the two openings are located is higher than the horizontal plane where the conveyor belt 4 is located and lower than the lowest point of the combustible gas exhaust assisting structure. A hinged closed door 16 is provided on the opening, and the opening is closed by the closed door 16 when observation and negative pressure adjustment are not required.

[0045] like Figure 2 , 3 As shown, the tailings conveying mechanism includes a slag bucket 17, a slag discharger and a slag pit. Water is added to the slag discharger, and the amount of water added does not exceed the inspection hole of the slag discharger. The slag discharger is linked with the conveyor belt 4. The bottom end of the residue trough 9 is fixedly connected to the top of the slag bucket 17. The bottom of the slag bucket 17 is sealed with the slag discharger. A slag pit is arranged vertically below the end of the slag discharger away from the slag bucket 17. The slag pit is used to receive the water brought out during the conveying process of the slag discharger. The means of "the slag discharger is linked with the conveyor belt 4" can be to control the respective power supply motors to rotate at the same speed. The slag discharger adopts a small model in the prior art to meet the slag discharge requirements of combustion. After the conveyor belt 4 stops, the slag discharger needs to be opened for another 10 minutes to discharge the slag. The slag discharger cannot be stopped when the conveyor belt 4 is running to avoid the slag discharger jamming. The slag hopper 17 and the slag discharger are well sealed, and water is only added to the slag discharger, while the slag discharger pit does not need water, so as to facilitate the cleaning of the coke nodules; if the seal between the slag hopper 17 and the slag discharger is not good, water is allowed to be added to the slag pit, but the water level in the slag discharger cannot exceed the inspection hole of the slag discharger to prevent the slag or ash in the slag discharger from entering the slag pit, which is inconvenient to clean. The slag discharger includes a driving wheel assembly, a supporting wheel assembly, a driven wheel assembly, a chain plate assembly, a power output assembly, etc.

[0046] like Figure 4 As shown, multiple gas combustion chambers 2 burn independently, and a gas through hole 18 is opened on the partition wall between two adjacent gas combustion chambers 2. The gas through holes 18 between the multiple gas combustion chambers 2 are arranged in a non-linear manner, and are arranged in a staggered manner. The non-linear arrangement means that the connecting line of all the gas through holes 18 is not a straight line. The staggered arrangement means that the gas through holes 18 of the first gas combustion chamber and the second gas combustion chamber are opened on the left, the gas through holes 18 of the second gas combustion chamber and the third gas combustion chamber are opened on the right, the gas through holes 18 of the third gas combustion chamber and the fourth gas combustion chamber are opened on the left, and the gas through holes 18 of the fourth gas combustion chamber and the fifth gas combustion chamber are opened on the right.

[0047] like Figure 1 , 4 As shown, the multiple gas combustion chambers 2 are all made of refractory bricks, the outside of the refractory bricks are evenly wrapped with insulation materials, a metal shell is arranged outside the insulation materials, and a door for cleaning and maintenance is opened on one of the side walls of a single gas combustion chamber 2.

[0048] like Figure 1 , 4 As shown, a mixing chamber 19 is provided at the hot air outlet end of the gas combustion chamber 2, a hot air main pipe 20 is provided at the top of the mixing chamber 19, a chimney 21 and a hot air delivery pipe 22 are connected in parallel to the hot air main pipe 20, the hot air delivery pipe 22 is connected to the washing powder drying preparation production line, a vent valve is provided on the chimney 21, a temperature regulating air duct 24 is connected to the side wall of the mixing chamber 19, an air supply fan 23 and a cold air regulating valve are provided on the temperature regulating air duct 24, and a temperature sensor and a pressure sensor are provided in the mixing chamber 19.

[0049] By using the burner of the present application, the dust content of the hot air can meet the national emission standards, and the degree of automation is relatively high: automatic unloading (the loading elevator automatically unloads the material), automatic feeding (the feeding gate 6 controls the feeding amount and cooperates with the rotation of the conveyor belt 4 to realize automatic flat feeding), automatic slag discharge (the slag bucket 17 cooperates with the slag discharger, the slag bucket 17 receives the slag, and the slag discharger automatically and continuously discharges the slag), the rotation of the conveyor belt 4 realizes the automatic displacement of the combustion material, and ensures that the combustible gas is delivered to the gas combustion chamber 2. The conveyor belt 4 and the slag discharger are linked to ensure the smoothness of slag discharge and slag discharge, and avoid too much residue in the slag bucket 17 affecting the water seal effect, and then affecting the negative pressure environment, temperature, and combustion sufficiency in the gas burner body.

[0050] The implementation principle of the embodiment of the present application is as follows: the burner uses biomass powder as fuel, and produces high-temperature combustible gas through combustion conversion of the burner body 1. The combustible gas enters multiple gas combustion chambers 2 for secondary combustion and polymerization purification. The clean hot air is exported from the multiple gas combustion chambers 2 to the mixing chamber 19, and a certain amount of natural wind is mixed through the air supply fan 23 and the cold air regulating valve, and adjusted to the temperature required for the washing powder drying process, and enters the drying tower for drying. The burnt slag is discharged from the outlet end of the burner body 1 to the slag discharger, and is sent to the cart for transportation through the slag discharger.

[0051] The temperature of the hot air entering the drying tower is adjusted by adjusting the cold air regulating valve; the total amount of combustible gas supplied is adjusted by adjusting the amount of fuel supplied and the amount of air used to support combustion (specifically adjusting the fan 3 and the air inlet valve), and finally the total amount of heating air is adjusted; the burner body 1 and multiple gas combustion chambers 2 are kept at negative pressure by adjusting the air supply fan 23, the cold air regulating valve and the high-temperature gate valve. The tail of the burner chamber is locally regulated by the closed door 16, and the feed end of the burner chamber can also be locally regulated by the ash cleaning port 26, multiple first observation ports 27, and multiple second observation ports 28. All of the above adjustments will affect the wind temperature, air volume and wind pressure of the entire burner. During the adjustment, the operator should observe repeatedly until the entire burner is balanced, that is, the combustion in a negative pressure environment maintained in this application is achieved by the comprehensive synergy of all relevant pressure regulation-related components.

[0052] Before the burner body 1 starts, it is necessary to fill the water cooling mechanism with cold water, open the vent valve and high-temperature gate valve, ignite and dry the burner chamber, detect the temperature in the burner chamber by the temperature sensor, detect the pressure in the burner chamber by the pressure sensor, and adjust the high-temperature gate valve to keep a slight negative pressure in the burner chamber. When the temperature in the burner chamber reaches the next stage, start the slag discharger, adjust the speed of the reducer and the combustion-supporting fan 3 matched with the conveyor belt 4 according to the temperature and time requirements of the burner chamber; adjust the thickness of the fuel layer through the feed gate 6. In order to prevent the temperature of the chimney 21 from being too high, open the cold air regulating valve of the mixing chamber 19 and introduce an appropriate amount of cold air. When the temperature of the gas combustion chamber 2 reaches the qualified temperature, hot air can be transported to the washing powder drying tower. First, the induced draft fan is opened in the washing powder drying workshop, and the hot air enters the drying tower, then the vent valve of the chimney 21 is closed, and the opening degree of the cold air regulating valve is adjusted to adjust the hot air temperature in the mixing chamber 19 to the temperature required for drying production. The whole process should be carried out step by step. If the input hot air temperature rises, the frequency of the reducer of the conveyor belt 4 and the frequency of the combustion-supporting fan 3 should be slowly reduced to reduce the amount of fuel, or the cold air regulating valve should be opened to increase the cold air volume to maintain the input hot air temperature. The burner body 1 should always maintain a slight negative pressure state, and the chimney 21 vent valve should be in a closed state.

[0053] According to the production requirements, adjust the feeding speed of the conveyor belt 4 and observe the combustion situation in the burner body 1; adjust the speed of the combustion-supporting fan 3 and the opening of the two air inlet valves to make the flame uniform and white, and the fuel layer stable. Try to let the fuel burn out 30 cm in front of the rear arch 13 to reduce the amount of ash raised, avoid strong combustion of the fuel in the front part of the burner body 1 and keep the temperature of the gas combustion chamber 2 (the measuring point is located in the gas combustion chamber 2 in front of the mixing chamber 19) at about 900°C. Observe the combustion of the fuel on the conveyor belt 4. It should be basically a horizontal straight line (parallel to the width direction of the conveyor belt 4) at the burnout point. The fuel layer should be burned out about 30 cm in front of the rear arch 13. If the fuel layer burns strongly in the front half of the conveyor belt 4 and is burned out at a long distance from the rear arch 13, the air inlet valve should be adjusted, the air inlet valve at the inlet end of the burner body 1 should be closed, and the air inlet valve at the outlet end of the burner body 1 should be opened to reduce the combustion speed of the fuel layer in the front part, reasonably utilize the effective area of ​​the conveyor belt 4, and allow the fuel layer to burn evenly on the entire conveyor belt 4 to reduce the amount of ash raised, prevent local overheating and a large amount of ash raised and coking.

[0054] During the combustion process, there should be enough fuel in the feeding mechanism to maintain the continuity of combustion and to seal the feeding position. During normal production, the temperature of the hot air entering the drying tower should be maintained to make it suitable for the product drying production process. The opening degree of the cold air regulating valve should be adjusted to keep the temperature of the hot air entering the drying tower stable.

Claims

1. A burner for a washing powder drying preparation process, the burner provides hot air required for washing powder drying preparation, the burner comprises a burner body (1), a feeding mechanism and a tailings conveying mechanism, the feeding mechanism and the tailings conveying mechanism are respectively arranged at the inlet end and the outlet end of the burner body (1), the feeding mechanism conveys the external biomass powder fuel into the burner body (1), and the tailings conveying mechanism transports the residue after combustion to the next process, characterized in that: The burner also includes a plurality of gas combustion chambers (2), the plurality of gas combustion chambers (2) are arranged in sequence, one end of the plurality of gas combustion chambers (2) is connected to one side of the burner body (1), and the other end of the plurality of gas combustion chambers (2) outputs hot air through a high-temperature gate valve; the burner body (1) includes a burner chamber, a fan (3), an air inlet valve, a conveyor belt (4), a residue tank (9), a combustible gas outlet (5), a conveying power device (10), a combustible gas exhaust assisting structure, a water cooling mechanism, a feed gate (6) and a ash cleaning bin (7); the surrounding wall structure of the burner chamber is made of refractory bricks, and the outside of the refractory bricks is The burner body (1) is uniformly wrapped with a heat-insulating material, a metal shell is arranged outside the heat-insulating material, a fan (3) is arranged on a side of the burner body (1) away from the gas combustion chamber, two air inlets (8) are respectively opened on a side of the burner body (1) close to the fan (3), each air inlet (8) is correspondingly provided with an air inlet valve, the fan (3) is respectively connected to the two air inlet valves through parallel air ducts, a conveyor belt (4) is horizontally arranged in the burner chamber, one end of the conveyor belt (4) corresponds to the feeding mechanism, and the other end of the conveyor belt (4) corresponds to the tailing conveying mechanism, a residue trough (9) is arranged at one end of the burner chamber close to the tailing conveying mechanism, and the residue trough (9) ) is parallel to the width direction of the conveyor belt (4), a slag trough (9) is arranged at one end of the conveyor belt (4), the vertical bottom of the slag trough (9) is connected to the tailing conveying mechanism, a combustible gas port (5) is arranged on the side of the burner chamber close to the gas combustion chamber (2), the burner chamber conveys the combustible gas to the gas combustion chamber (2) through the combustible gas port (5), a combustible gas exhaust assisting structure is arranged at the top of the burner chamber, the combustible gas port (5) and the combustible gas exhaust assisting structure are arranged in sequence in the conveying direction of the conveyor belt (4), a feed gate (6) is further provided at the inlet end of the burner body (1), and a feed gate (6) is provided at the inlet end of the feed gate (6). The interior is cooled by a water cooling mechanism, and the feed gate (6) controls the discharge amount and speed of the feeding mechanism to the conveyor belt (4), and adjusts the thickness of the fuel spread on the conveyor belt (4). The burner body (1) is also provided with a pressure sensor and a temperature sensor for detection. The ash cleaning bin (7) is arranged on one end of the burner body (1) close to the feeding mechanism, and the ash cleaning bin (7) is connected to the burner chamber. The conveyor belt (4) extends into the ash cleaning bin (7) and is connected to the conveying power device (10) in the ash cleaning bin (7) through a reducer and a transmission shaft. The conveying power device (10) is arranged on the side of the burner body (1) away from the gas combustion chamber.

2. A burner for a washing powder drying preparation process according to claim 1, characterized in that: The combustible gas exhaust assisting structure comprises a front arch (11), a middle arch (12) and a rear arch (13), wherein the front arch (11), the middle arch (12) and the rear arch (13) are arranged in sequence in the conveying direction of the conveyor belt (4), and the front arch (11), the middle arch (12) and the rear arch (13) all start to rise from the same side wall of the combustible gas passage (5) in the burner chamber along the top of the burner chamber, the middle arch (12) has a higher arch height than the front arch (11), and the rear arch (13) has a higher arch height than the middle arch (12).

3. A burner for a washing powder drying preparation process according to claim 1 or 2, characterized in that: The two air inlets (8) are arranged in sequence in the conveying direction of the conveyor belt (4), one of the air inlets (8) is close to the feeding end of the conveyor belt (4) and is in front of the conveying position of the combustible gas outlet (5) corresponding to the conveying position of the conveyor belt (4), and the other air inlet (8) is close to the slag discharge end of the conveyor belt (4) and corresponds to the position of the combustible gas exhaust assisting structure.

4. A burner for a washing powder drying preparation process according to claim 1, characterized in that: The feeding mechanism comprises a feeding bin (14), a feeding elevator, a feeding observation platform (15) and a feeding port. The feeding observation platform (15) is arranged at the top of the burner body (1) and close to the end of the inlet end. The feeding bin (14) and the feeding elevator are arranged side by side at the inlet end. The position of the feeding observation platform (15) corresponds to the position of the feeding bin (14). The top of the feeding bin (14) is open and the bottom of the feeding bin (14) is connected to the feeding port. Therefore, the length of the feeding port matches the width of the conveyor belt (4). The opening and closing degree of the feeding gate (6) adjusts the feeding speed of the feeding port to the conveyor belt (4).

5. A burner for a washing powder drying preparation process according to claim 1, characterized in that: Gaps are provided between the two ends of the width of the conveyor belt (4) and the inner wall of the burner chamber, and the width of the gap is 6-15 mm. The burner body (1) is provided with a through hole on the side wall at the outlet end, and there are two through holes. The two through holes are arranged on the same horizontal plane. The two through holes are arranged at both ends of the width direction of the conveyor belt (4). The horizontal plane where the two through holes are located is higher than the horizontal plane where the conveyor belt (4) is located and lower than the lowest point of the combustible gas exhaust auxiliary structure. A closed door (16) is hinged on the through hole. A guard plate (25) is added in the gap between the conveyor belt (4) and the inner wall of the burner chamber. The guard plate (25) is a hollow structure. The guard plate (25) is connected to the water cooling mechanism. The length of the guard plate (25) matches the length of the conveyor belt (4).

6. A burner for a washing powder drying preparation process according to claim 1, characterized in that: The tailings conveying mechanism comprises a slag bucket (17), a slag discharger and a slag pit. Water is added to the slag discharger, and the amount of water added does not exceed the inspection hole of the slag discharger. The slag discharger is linked to the conveyor belt (4). The bottom end of the residue trough (9) is fixedly connected to the top of the slag bucket (17). The bottom of the slag bucket (17) is sealed to the slag discharger. A slag pit is arranged vertically below one end of the slag discharger away from the slag bucket (17). The slag pit is used to receive water brought out by the slag discharger during the conveying process.

7. A burner for a washing powder drying preparation process according to claim 1, characterized in that: The plurality of gas combustion chambers (2) burn independently, a gas through hole (18) is provided on the partition wall between two adjacent gas combustion chambers (2), and the gas through holes (18) between the plurality of gas combustion chambers (2) are arranged in a non-linear manner and are arranged in a staggered manner.

8. A burner for a washing powder drying preparation process according to claim 1 or 7, characterized in that: The plurality of gas combustion chambers (2) are all made of refractory bricks, the outside of the refractory bricks is evenly wrapped with insulation material, a metal shell is arranged outside the insulation material, and a door for cleaning and maintenance is opened on one of the side walls of a single gas combustion chamber (2).

9. A burner for a washing powder drying preparation process according to claim 1, characterized in that: A mixing chamber (19) is provided at the hot air outlet end of the gas combustion chamber (2); a high-temperature gate valve regulates the channel opening of the gas combustion chamber (2) and the mixing chamber (19); a hot air main pipe (20) is provided at the top of the mixing chamber (19); a chimney (21) and a hot air delivery pipe (22) are connected in parallel to the hot air main pipe (20); the hot air delivery pipe (22) is connected to a washing powder drying preparation production line; a vent valve is provided on the chimney (21); a temperature regulating air pipe (24) is connected to the side wall of the mixing chamber (19); an air supply fan (23) and a cold air regulating valve are provided on the temperature regulating air pipe (24); and a temperature sensor and a pressure sensor are provided in the mixing chamber (19).

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