Explosion-proof rotary furnace and control method thereof

Abstract

The invention relates to the technical field of rotary furnaces, in particular to an anti-explosion rotary furnace and a control method thereof.The anti-explosion rotary furnace comprises an anti-explosion rotary furnace body, a circulating pipeline, an inert gas storage tank, a pressure relief mechanism, a filtering mechanism, a first monitoring part, a second monitoring part, a third monitoring part and a fourth monitoring part; the first monitoring part, the second monitoring part, the third monitoring part and the fourth monitoring part are used for monitoring the concentration and pressure of gas on the side, away from the outlet end of the baking chamber, of the filtering mechanism, the concentration and pressure of gas at the position of the first pipeline, the concentration and pressure of gas at the position of the second pipeline and the concentration of gas on the side, close to the outlet end of the baking chamber, of the filtering mechanism correspondingly. By monitoring the concentration and pressure of the gas in the explosion-proof rotary furnace, inert gas is supplemented into the explosion-proof rotary furnace or mixed gas in the explosion-proof rotary furnace is released, and real-time accurate explosion-proof and explosion-suppression of different baked foods and explosion-proof rotary furnaces of different models can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of rotary furnaces, in particular to an explosion-proof rotary furnace and a control method thereof. Background Art

[0002] Rotary oven baking equipment refers to equipment that uses a variety of different energy sources (such as electricity, diesel, gas, etc.) to heat the combustion chamber, sends hot air into the furnace through a heat exchanger and a fan, and then bakes the items in the furnace. It is widely used in food, agriculture, chemical industry and other fields.

[0003] Existing heating methods for food baking rotary furnaces include:

[0004] 1. Use heated air: heating and baking are carried out through direct contact between hot air and food;

[0005] 2. Use radiation elements: heat and bake food by direct contact with radiation waves;

[0006] 3. Heating and baking are carried out by combining heated air with radiation heat exchange;

[0007] Among these heating methods, the mechanism of action is mainly to heat the food from the outside to the inside through heat conduction, convection heat transfer and radiation heat transfer (although radiation heat transfer radiation waves can achieve heating from the inside to the outside, the penetration depth of radiation waves is very small, and the food is still mainly heated from the outside to the inside).

[0008] When baking food in a rotary oven, there are usually the following explosion risks:

[0009] 1. Under the heating mechanism of the above-mentioned rotary oven for baking food, for food containing a large amount of gas (for example, moon cakes and bread with fillings), it is impossible to prevent the internal gas from expanding, resulting in the risk of explosion during the baking process due to the rapid expansion of gas;

[0010] 2. The heating process of food is a complex physical and chemical process. When the food is baked in a rotary oven, the food will release a large amount of water vapor, generate or volatilize dust particles, and combustible or non-combustible gases. As for the internal structure of the rotary oven, it has a relatively independent baking chamber with excellent sealing performance. Once the air, water vapor, dust particles, combustible or non-combustible gases in the oven accumulate to a certain amount, the pressure in the baking chamber will gradually increase, and there is a risk of explosion caused by excessive pressure;

[0011] 3. For the combustible gases and combustible dust generated or volatilized during the food baking process, when their concentration reaches a certain level and the temperature in the furnace rises to the baking temperature, the temperature of the entire baking room is very high, especially in the rotary furnace that burns fuel. The gas temperature outside the combustion chamber is as high as 800 degrees Celsius or above. When combustible gases and combustible dust pass through, dangerous situations such as deflagration and explosion are very likely to occur. Summary of the invention

[0012] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides an explosion-proof rotary furnace and a control method thereof. By improving the explosion-proof method of the explosion-proof rotary furnace, it is possible to accurately prevent and suppress explosions in real time.

[0013] The technical solution adopted by the present invention is as follows:

[0014] A kind of explosion-proof rotary furnace, comprising: an explosion-proof rotary furnace, a circulation pipeline, an inert gas storage tank, a pressure relief mechanism, a filtering mechanism, a first monitoring unit, a second monitoring unit, a third monitoring unit and a fourth monitoring unit, wherein the explosion-proof rotary furnace is provided with a baking chamber, and the baking chamber is used for baking food, the circulation pipeline comprises: a first pipeline and a second pipeline, one end of the first pipeline is connected to the second pipeline, the other end of the first pipeline is connected to the outlet end of the baking chamber, and the other end of the second pipeline is connected to the inlet end of the baking chamber, the inert gas storage tank is connected to the explosion-proof rotary furnace, a nozzle is arranged on one side of the inert gas storage tank, the nozzle is located in the first pipeline, and the nozzle is connected to the inert gas storage tank through a first connecting pipe, an electric regulating valve is connected in series on the first connecting pipe, and the pressure relief mechanism comprises: a pressure relief pipe and a pressure relief valve, the pressure relief pipe runs through the explosion-proof rotary furnace a rotary furnace, and the pressure relief pipe is connected to the second pipeline, the pressure relief valve is located outside the explosion-proof rotary furnace and is connected in series to the pressure relief pipe, the filtering mechanism is located at the outlet end of the baking chamber, the filtering mechanism comprises: a filtering part, the filtering part is used to filter the gas discharged from the outlet end of the baking chamber, the first monitoring part is located on the side of the filtering mechanism away from the outlet end of the baking chamber, and is used to monitor the concentration and pressure of the gas on the side of the filtering mechanism away from the outlet end of the baking chamber, the second monitoring part is located in the first pipeline, and is used to monitor the concentration and pressure of the gas at the position of the first pipeline, the third monitoring part is located in the second pipeline, and is used to monitor the concentration and pressure of the gas at the position of the second pipeline, and the fourth monitoring part is located on the side of the filtering mechanism close to the outlet end of the baking chamber, and is used to monitor the concentration of the gas on the side of the filtering mechanism close to the outlet end of the baking chamber.

[0015] Therefore, by monitoring the concentration and pressure of the gas in the explosion-proof rotary furnace to add inert gas into the explosion-proof rotary furnace or release the mixed gas in the explosion-proof rotary furnace, real-time and accurate explosion prevention and suppression of different baked foods and different types of explosion-proof rotary furnaces can be achieved.

[0016] Furthermore, it also includes: a heat exchange part, which includes: a burner and a heat exchanger, the burner and the heat exchanger are both located in the first pipeline, the burner is connected to the heat exchanger, and the heat exchanger is connected to the outside of the explosion-proof rotary furnace through a smoke exhaust port.

[0017] Furthermore, it also includes: a fan, which is installed on the explosion-proof rotary furnace, one end of the fan is connected to the first pipeline, and the other end of the fan is connected to the second pipeline.

[0018] Furthermore, the circulation pipeline further includes: a third pipeline, the other end of the second pipeline is connected to one end of the third pipeline, and the other end of the third pipeline is connected to the inlet end of the baking chamber.

[0019] Furthermore, a second connecting pipe is provided on the other side of the inert gas storage tank, the second connecting pipe extends to the outside of the explosion-proof rotary furnace, the second connecting pipe is connected in series with a stop valve, and the stop valve is located outside the explosion-proof rotary furnace.

[0020] Furthermore, the pressure relief mechanism is also connected in series with a muffler, which is located on the side of the pressure relief valve away from the explosion-proof rotary furnace, and a discharge pipe is also provided at one end of the pressure relief pipe away from the explosion-proof rotary furnace. Thus, by adding a muffler, the noise generated during pressure relief can be reduced.

[0021] Furthermore, the filtering mechanism further comprises: a baffle, a solid adsorption part and a dust collection tank, wherein the baffle, the filtering part and the solid adsorption part are connected in sequence, and the dust collection tank is located at the bottom of the filtering part and is connected to the baffle and the solid adsorption part; the filtering part comprises: a fixed plate and a filter screen, wherein the filter screen is slidably connected to the fixed plate, and the baffle and the solid adsorption part are both connected to the fixed plate. Thus, through the baffle, when the gas flows through the gap of the baffle, due to a sharp turn, the solid dust can be thrown out and achieve the initial separation, and fall into the dust collection tank, and then, the mixed gas passes through the filter screen to achieve the screening of the solid dust (separation again), and the screened dust adheres to the filter screen or falls into the dust collection tank; by replacing the filter screen and the dust collection tank, the efficient filtering of the filter screen is ensured; the solid adsorption part adsorbs and removes the combustible organic gas in the mixed gas, effectively reducing the concentration of the combustible organic gas in the air, and preventing the mixed gas entering the burner and the heat exchanger from exploding under the action of high temperature.

[0022] Furthermore, it also includes: a motor, a rotating shaft and a grill, wherein the motor is installed outside the explosion-proof rotary furnace, the grill is located inside the baking chamber, and the driving end of the motor is connected to the grill through the rotating shaft. Thus, the grill is driven to rotate by the motor, so that the food in the grill is evenly baked.

[0023] Furthermore, the first monitoring unit, the second monitoring unit and the third monitoring unit have the same structure; the first monitoring unit includes: a first concentration sensor and a pressure sensor; and the fourth monitoring unit is a second concentration sensor.

[0024] A method for controlling an explosion-proof rotary furnace comprises the following steps:

[0025] S1, obtaining the concentration of the gas in the first monitoring part, the concentration of the gas in the second monitoring part, and the concentration of the gas in the third monitoring part. If the concentration of the gas in the first monitoring part, the concentration of the gas in the second monitoring part, or the concentration of the gas in the third monitoring part exceeds 90% of the first preset explosion concentration, then execute S2; otherwise, execute S9;

[0026] S2, opening the electric regulating valve so that the inert gas in the inert gas storage tank is sprayed into the first pipeline through the first connecting pipe;

[0027] S3, if the concentration of the gas in the first monitoring part, the concentration of the gas in the second monitoring part, or the concentration of the gas in the third monitoring part exceeds 90% of the second explosion preset concentration, then execute S4, otherwise, execute S7;

[0028] S4, opening the pressure relief valve to discharge the mixed gas in the second pipeline;

[0029] S5, if the concentration of the gas in the first monitoring part, the concentration of the gas in the second monitoring part, or the concentration of the gas in the third monitoring part exceeds 80% of the first preset explosion concentration, execute S6;

[0030] S6, closing the electric regulating valve and the pressure relief valve, and executing S9;

[0031] S7, if the concentration of the gas in the first monitoring part, the concentration of the gas in the second monitoring part, or the concentration of the gas in the third monitoring part exceeds 80% of the first preset explosion concentration, execute S8, otherwise, execute S3;

[0032] S8, closing the electric regulating valve, and executing S9;

[0033] S9, obtaining the pressure of the first monitoring part gas, the pressure of the second monitoring part gas, and the pressure of the third monitoring part gas. If the concentration of the pressure of the first monitoring part gas, the pressure of the second monitoring part gas, or the pressure of the third monitoring part gas exceeds 90% of the preset pressure, executing S10, otherwise, executing S12;

[0034] S10, opening the pressure relief valve to discharge the mixed gas in the second pipeline;

[0035] S11, if the concentration of the pressure of the gas in the first monitoring part, the pressure of the gas in the second monitoring part, or the pressure of the gas in the third monitoring part exceeds 80% of the preset pressure;

[0036] S12, closing the pressure relief valve.

[0037] The beneficial effects of the present invention are as follows:

[0038] The present invention monitors the concentration and pressure of the gas in the explosion-proof rotary furnace to supplement the inert gas into the explosion-proof rotary furnace or release the mixed gas in the explosion-proof rotary furnace, thereby realizing real-time and accurate explosion prevention and suppression of different baked foods and explosion-proof rotary furnaces of different models.

[0039] The present invention also includes the following advantages:

[0040] 1. The present invention only adds small equipment such as an inert gas storage tank, a pressure relief valve, a solid adsorption part, a filter screen, and a baffle to the traditional rotary furnace, without changing the existing rotary furnace structure and baking process. It is simple and clear and easy to operate.

[0041] 2. The present invention uses small equipment such as inert gas storage tanks, pressure relief valves, solid adsorption parts, filters, baffles, etc. to reduce the concentration of mixed gas, combustible emissions, adsorption of combustible gases, and other means to achieve integrated explosion-proof and explosion-suppression of explosion-proof rotary furnaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of the explosion-proof rotary furnace of the present invention;

[0043] Figure 2 is a cross-sectional view of an explosion-proof rotary furnace of the present invention;

[0044] Figure 3 It is a structural schematic diagram of an inert gas storage tank of the present invention;

[0045] Figure 4 It is a structural schematic diagram of the pressure relief mechanism of the present invention;

[0046] Figure 5 It is a structural schematic diagram of the filtering mechanism of the present invention;

[0047] Figure 6 It is a structural schematic diagram of the filter unit of the present invention;

[0048] Figure 7 The schematic diagram of the structure of the first monitoring unit of the present invention is

[0049] Figure 8 The present invention is a flow chart of the method for controlling the explosion-proof rotary furnace of the present invention.

[0050] Among them: 1. Explosion-proof rotary furnace;

[0051] 101. Baking room;

[0052] 2. Circulation pipeline;

[0053] 201, first pipeline; 202, second pipeline; 203, third pipeline;

[0054] 3. Inert gas storage tank;

[0055] 301, nozzle; 302, first connecting pipe; 303, electric regulating valve; 304, second connecting pipe; 305, stop valve; 306, third connecting pipe; 307, safety valve;

[0056] 4. Pressure relief mechanism;

[0057] 401, pressure relief pipe; 402, pressure relief valve; 403, muffler; 404, vent pipe;

[0058] 5. Filter mechanism;

[0059] 501, filter unit; 5011, fixed plate; 5012, filter screen; 502, baffle; 503, solid adsorption unit; 504, dust collection tank;

[0060] 6. First Monitoring Department;

[0061] 601, a first concentration sensor; 602, a pressure sensor;

[0062] 7. Second Monitoring Department;

[0063] 8. The third monitoring department;

[0064] 9. Second concentration sensor;

[0065] 10. Heat exchange part;

[0066] 11. Burner; 12. Heat exchanger;

[0067] 13. Smoke exhaust port;

[0068] 14. Fan;

[0069] 15. Motor;

[0070] 16. Rotating shaft;

[0071] 17. Grill. DETAILED DESCRIPTION

[0072] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0073] like Figures 1 to 7 As shown, an explosion-proof rotary furnace comprises: an explosion-proof rotary furnace 1, a circulation pipeline 2, an inert gas storage tank 3, a pressure relief mechanism 4, a filtering mechanism 5, a first monitoring unit 6, a second monitoring unit 7, a third monitoring unit 8 and a fourth monitoring unit. The explosion-proof rotary furnace 1 is provided with a baking chamber 101, and the baking chamber 101 is used for baking food. The circulation pipeline 2 comprises: a first pipeline 201 and a second pipeline 202, one end of the first pipeline 201 is connected to the second pipeline 202, and the other end of the first pipeline 201 is connected to the baking chamber 101. The outlet end of the baking chamber 101 is connected, the other end of the second pipeline 202 is connected to the inlet end of the baking chamber 101, the inert gas storage tank 3 is connected to the explosion-proof rotary furnace 1, a nozzle 301 is arranged on one side of the inert gas storage tank 3, the nozzle 301 is located in the first pipeline 201, and the nozzle 301 is connected to the inert gas storage tank 3 through the first connecting pipe 302, the first connecting pipe 302 is connected in series with an electric regulating valve 303, and the pressure relief mechanism 4 includes: a pressure relief pipe 401 and a pressure relief valve 40 2. The pressure relief pipe 401 runs through the explosion-proof rotary furnace 1, and the pressure relief pipe 401 is connected to the second pipe 202. The pressure relief valve 402 is located outside the explosion-proof rotary furnace 1 and is connected in series to the pressure relief pipe 401. The filter mechanism 5 is located at the outlet end of the baking chamber 101. The filter mechanism 5 includes: a filter part 501, and the filter part 501 is used to filter the gas discharged from the outlet end of the baking chamber 101. The first monitoring part 6 is located on the side of the filter mechanism 5 away from the outlet end of the baking chamber 101, and is used to monitor the concentration and pressure of the gas on the side of the filter mechanism 5 away from the outlet end of the baking chamber 101. The second monitoring part 7 is located in the first pipe 201 and is used to monitor the concentration and pressure of the gas at the position of the first pipe 201. The third monitoring part 8 is located in the second pipe 202 and is used to monitor the concentration and pressure of the gas at the position of the second pipe 202. The fourth monitoring part is located on the side of the filter mechanism 5 close to the outlet end of the baking chamber 101, and is used to monitor the concentration of the gas on the side of the filter mechanism 5 close to the outlet end of the baking chamber 101. Therefore, by monitoring the concentration and pressure of the gas in the explosion-proof rotary furnace 1, inert gas is added to the explosion-proof rotary furnace 1 or the mixed gas in the explosion-proof rotary furnace 1 is released, real-time and accurate explosion prevention and suppression of different baked foods and different models of explosion-proof rotary furnaces 1 can be achieved.

[0074] Specifically, the inert gas enters the first pipe 201 and mixes with the gas in the first pipe 201 to form a mixed gas. The released inert gas can quickly reduce the concentration of the entire mixed gas.

[0075] Specifically, the baking chamber 101 is also equipped with a cabinet door (not shown in the figure). When the baking operation is performed, the cabinet door is closed to form a closed space in the baking chamber 101 to improve the baking efficiency of the entire device.

[0076] In this embodiment, it also includes: a heat exchange part 10, the heat exchange part 10 includes: a burner 11 and a heat exchanger 12, the burner 11 and the heat exchanger 12 are both located in the first pipe 201, the burner 11 is connected to the heat exchanger 12, and the heat exchanger 12 is connected to the outside of the explosion-proof rotary furnace 1 through the smoke exhaust port 13. Specifically, the heat exchange part 10 can also adopt an electric heating method, such as: an electric heating pipe or an electric heating wire.

[0077] In this embodiment, it also includes: a fan 14, which is installed on the explosion-proof rotary furnace 1, one end of the fan 14 is connected to the first pipe 201, and the other end of the fan 14 is connected to the second pipe 202. Specifically, the heat exchange unit 10 is used to heat and exchange air, and the fan 14 is used to circulate air between the first pipe 201, the second pipe 202, the third pipe 203 and the baking chamber 101, and the circulating air is used to bake the food in the baking chamber 101.

[0078] In this embodiment, the circulation pipeline 2 further includes: a third pipeline 203 , the other end of the second pipeline 202 is connected to one end of the third pipeline 203 , and the other end of the third pipeline 203 is connected to the inlet end of the baking chamber 101 .

[0079] In this embodiment, a second connecting pipe 304 is provided on the other side of the inert gas storage tank 3 , and the second connecting pipe 304 extends to the outside of the explosion-proof rotary furnace 1 . The second connecting pipe 304 is connected in series with a stop valve 305 , and the stop valve 305 is located outside the explosion-proof rotary furnace 1 . Specifically, the inert gas storage tank 3 is made of metal and is made into a sealed cavity; the second connecting pipe 304 is also connected in series with a pressure gauge (not shown in the figure), and the pressure in the inert gas storage tank 3 can be monitored by the pressure gauge, so as to open the stop valve 305 and inject inert gas into the inert gas storage tank 3 through the second connecting pipe 304; the inert gas storage tank 3 is also provided with a third connecting pipe 306, and the third connecting pipe 306 is provided with a safety valve 307. When the inert gas storage tank 3 is over-pressured, the safety valve 307 is opened, and the inert gas in the inert gas storage tank 3 is discharged through the third connecting pipe 306 to realize automatic pressure relief of over-pressure. In addition, the third connecting pipe 306 is arranged upward, so that the over-pressure inert gas can be discharged upward to a safe area; the inert gas storage tank 3 is square in shape and can also serve as the outer shell of the explosion-proof rotary furnace 1.

[0080] In this embodiment, the pressure relief mechanism 4 is also connected in series with a muffler 403, which is located on the side of the pressure relief valve 402 away from the explosion-proof rotary furnace 1, and a discharge pipe 404 is also provided at one end of the pressure relief pipe 401 away from the explosion-proof rotary furnace 1. Therefore, by installing the muffler 403, the noise generated during pressure relief can be reduced.

[0081] In this embodiment, the filtering mechanism 5 also includes: a baffle 502, a solid adsorption part 503 and a dust collection trough 504. The baffle 502, the filter part 501 and the solid adsorption part 503 are connected in sequence. The dust collection trough 504 is located at the bottom of the filter part 501 and is connected to the baffle 502 and the solid adsorption part 503; the filter part 501 includes: a fixed plate 5011 and a filter net 5012. The filter net 5012 is slidably connected to the fixed plate 5011. The baffle 502 and the solid adsorption part 503 are both connected to the fixed plate 5011. Therefore, through the baffle 502, when the gas flows through the gap of the baffle 502, due to the sharp turn, the solid dust (a gas-solid mixture of combustible gas and combustible dust mixed in the air after the hot air passes through the food) can be thrown out and initially separated and fall into the dust collection tank 504, and then the mixed gas passes through the filter 5012 to achieve solid dust screening (separation again), and the screened dust adheres to the filter 5012 or falls into the dust collection tank 504; by replacing the filter 5012 and the dust collection tank 504, the efficient filtration of the filter 5012 is guaranteed; the combustible organic gas in the mixed gas is adsorbed and removed by the solid adsorption part 503, so as to effectively reduce the concentration of combustible organic gas in the air, and the mixed gas entering the burner 11 and the heat exchanger 12 is subjected to high temperature to explode.

[0082] Specifically, the baffle 502 is fixed to the fixed plate 5011 by welding or bolts, and the baffle 502 is provided with multiple pieces, and the multiple pieces are arranged parallel to each other; the baffle 502 is a metal thin plate, and the width of the baffle 502 is equivalent to that of the fixed plate 5011; the cross-sectional area of ​​the gap between the parallel baffles 502 should make the air flow rate 2m / s-5m / s, and the angle between the baffle 502 and the air flow direction is less than 45°. When the air flows through the gap between the parallel baffles 502, the air can achieve preliminary separation of dust from the air due to the sharp turn, and the separated dust settles into the dust collection trough 504 under the action of gravity.

[0083] Specifically, the filter 5012 is a metal filter 5012 with a metal frame, which is easy to replace by sliding installation.

[0084] Specifically, the solid adsorption part 503 (filled with solid adsorbent) adopts a box-type structure to facilitate the replacement of the solid adsorbent, and is a high-temperature resistant metal shell; the solid adsorbent is used in the low and medium temperature range (100℃-120℃, food baking temperature range), for example: food-grade silica gel, zeolite molecular sieve, activated alumina, etc.

[0085] Specifically, the filter unit 501 , the baffle 502 , the solid adsorption unit 503 and the dust collection trough 504 are arranged along the height direction of the side plate at the outlet end of the baking chamber 101 , so that the space of the baking chamber 101 can be saved.

[0086] It should be noted that:

[0087] 1. Release the mixed gas through the pressure relief mechanism 4 to reduce the pressure of the mixed gas, thereby achieving explosion-proof treatment of excessive pressure;

[0088] Second, the inert gas is released through the inert gas storage tank 3 to reduce the concentration of the mixed gas. The baffle 502 and the filter 5012 cooperate with each other to filter the dust in the mixed gas. The solid adsorption part 503 can adsorb the combustible gas in the mixed gas, thereby achieving explosion-proof treatment of excessive concentration.

[0089] In this embodiment, the oven further comprises: a motor 15, a rotating shaft 16 and a grill 17. The motor 15 is installed outside the explosion-proof rotary oven 1, and the grill 17 is located inside the baking chamber 101. The driving end of the motor 15 is connected to the grill 17 through the rotating shaft 16. Thus, the grill 17 is driven to rotate by the motor 15, so that the food in the grill 17 is evenly baked.

[0090] In this embodiment, the first monitoring unit 6 , the second monitoring unit 7 and the third monitoring unit 8 have the same structure; the first monitoring unit 6 includes: a first concentration sensor 601 and a pressure sensor 602 ; the fourth monitoring unit is a second concentration sensor 9 .

[0091] The baking process of the food of the present invention is: first, open the cabinet door, put the food to be baked into the grill 17, and then close the cabinet door; then, start the heat exchange part 10, the fan 14 and the motor 15, heat the heat source gas through the heat exchange part 10 to form a heat source gas, and use the fan 14 to make the heat source gas circulate in the first pipe 201, the second pipe 202, the third pipe 203 and the baking chamber 101, control the grill 17 to rotate through the motor 15, so that the food rotates, and use the flowing heat source gas to bake the rotating food. After the food is baked, close the heat exchange part 10, the fan 14 and the motor 15, open the cabinet door, and the baking of the food can be completed.

[0092] like Figure 8 As shown, a control method for an explosion-proof rotary furnace comprises the following steps:

[0093] S1, obtaining the concentration of the gas in the first monitoring part 6, the concentration of the gas in the second monitoring part 7, and the concentration of the gas in the third monitoring part 8. If the concentration of the gas in the first monitoring part 6, the concentration of the gas in the second monitoring part 7, or the concentration of the gas in the third monitoring part 8 exceeds 90% of the first explosion preset concentration, then execute S2, otherwise, execute S9;

[0094] S2, opening the electric regulating valve 303, so that the inert gas in the inert gas storage tank 3 is sprayed into the first pipeline 201 through the first connecting pipe 302;

[0095] S3, if the concentration of the gas in the first monitoring part 6, the concentration of the gas in the second monitoring part 7 or the concentration of the gas in the third monitoring part 8 exceeds 90% of the second explosion preset concentration, then execute S4, otherwise, execute S7;

[0096] S4, opening the pressure relief valve 402 to discharge the mixed gas in the second pipeline 202;

[0097] S5, if the concentration of the gas in the first monitoring part 6, the concentration of the gas in the second monitoring part 7 or the concentration of the gas in the third monitoring part 8 exceeds 80% of the first explosion preset concentration, execute S6;

[0098] S6, close the electric regulating valve 303 and the pressure relief valve 402, and execute S9;

[0099] S7, if the concentration of the gas in the first monitoring part 6, the concentration of the gas in the second monitoring part 7 or the concentration of the gas in the third monitoring part 8 exceeds 80% of the first explosion preset concentration, then execute S8, otherwise, execute S3;

[0100] S8, close the electric regulating valve 303, and execute S9;

[0101] S9, obtaining the pressure of the gas in the first monitoring part 6, the pressure of the gas in the second monitoring part 7, and the pressure of the gas in the third monitoring part 8. If the concentration of the pressure of the gas in the first monitoring part 6, the pressure of the gas in the second monitoring part 7, or the pressure of the gas in the third monitoring part 8 exceeds 90% of the preset pressure, then executing S10, otherwise, executing S12;

[0102] S10, opening the pressure relief valve 402 to discharge the mixed gas in the second pipeline 202;

[0103] S11, if the concentration of the pressure of the gas in the first monitoring part 6, the pressure of the gas in the second monitoring part 7 or the pressure of the gas in the third monitoring part 8 exceeds 80% of the preset pressure;

[0104] S12, close the pressure relief valve 402.

[0105] In summary, the present invention monitors the concentration and pressure of the gas in the explosion-proof rotary furnace 1 to supplement the inert gas into the explosion-proof rotary furnace 1 or release the mixed gas in the explosion-proof rotary furnace 1, thereby realizing real-time and accurate explosion prevention and suppression of different baked foods and different models of explosion-proof rotary furnaces 1.

[0106] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. An explosion-proof rotary furnace, characterized in that: include: An explosion-proof rotary furnace (1), wherein the explosion-proof rotary furnace (1) is provided with a baking chamber (101), wherein the baking chamber (101) is used for baking food; A circulation pipeline (2), wherein the circulation pipeline (2) comprises: a first pipe (201) and a second pipe (202), wherein one end of the first pipe (201) is connected to the second pipe (202), the other end of the first pipe (201) is connected to the outlet end of the baking chamber (101), and the other end of the second pipe (202) is connected to the inlet end of the baking chamber (101); an inert gas storage tank (3), the inert gas storage tank (3) being connected to the explosion-proof rotary furnace (1), a nozzle (301) being arranged on one side of the inert gas storage tank (3), the nozzle (301) being located in the first pipeline (201), and the nozzle (301) being connected to the inert gas storage tank (3) via a first connecting pipe (302), and an electric regulating valve (303) being connected in series to the first connecting pipe (302); A pressure relief mechanism (4), the pressure relief mechanism (4) comprising: a pressure relief pipe (401) and a pressure relief valve (402), wherein the pressure relief pipe (401) runs through the explosion-proof rotary furnace (1), and the pressure relief pipe (401) is connected to the second pipeline (202), and the pressure relief valve (402) is located outside the explosion-proof rotary furnace (1) and is connected in series to the pressure relief pipe (401); A filtering mechanism (5), the filtering mechanism (5) being located at the outlet end of the baking chamber (101), the filtering mechanism (5) comprising: A filter unit (501), the filter unit (501) is used to filter the gas discharged from the outlet of the baking chamber (101) A first monitoring unit (6), a second monitoring unit (7), a third monitoring unit (8) and a fourth monitoring unit, wherein the first monitoring unit (6) is located on a side of the filter mechanism (5) away from the outlet end of the baking chamber (101), and is used to monitor the concentration and pressure of the gas on the side of the filter mechanism (5) away from the outlet end of the baking chamber (101); the second monitoring unit (7) is located in the first pipeline (201), and is used to monitor the concentration and pressure of the gas at the position of the first pipeline (201); the third monitoring unit (8) is located in the second pipeline (202), and is used to monitor the concentration and pressure of the gas at the position of the second pipeline (202); the fourth monitoring unit is located on a side of the filter mechanism (5) close to the outlet end of the baking chamber (101), and is used to monitor the concentration of the gas on the side of the filter mechanism (5) close to the outlet end of the baking chamber (101).

2. The explosion-proof rotary furnace according to claim 1, characterized in that: Also includes: A heat exchange unit (10), wherein the heat exchange unit (10) comprises: A burner (11) and a heat exchanger (12), wherein the burner (11) and the heat exchanger (12) are both located in the first pipe (201), the burner (11) is connected to the heat exchanger (12), and the heat exchanger (12) is connected to the outside of the explosion-proof rotary furnace (1) through a smoke exhaust port (13).

3. The explosion-proof rotary furnace according to claim 1, characterized in that: Also includes: A fan (14), wherein the fan (14) is installed on the explosion-proof rotary furnace (1), one end of the fan (14) is connected to the first pipeline (201), and the other end of the fan (14) is connected to the second pipeline (202).

4. The explosion-proof rotary furnace according to claim 1, characterized in that: The circulation pipeline (2) also includes: A third pipe (203), the other end of the second pipe (202) is connected to one end of the third pipe (203), and the other end of the third pipe (203) is connected to the inlet end of the baking chamber (101).

5. The explosion-proof rotary furnace according to claim 1, characterized in that: A second connecting pipe (304) is provided on the other side of the inert gas storage tank (3), the second connecting pipe (304) extending to the outside of the explosion-proof rotary furnace (1), the second connecting pipe (304) being connected in series with a stop valve (305), the stop valve (305) being located outside the explosion-proof rotary furnace (1).

6. The explosion-proof rotary furnace according to claim 1, characterized in that: The pressure relief mechanism (4) is also connected in series with a muffler (403), and the muffler (403) is located on a side of the pressure relief valve (402) away from the explosion-proof rotary furnace (1). A discharge pipe (404) is also provided at one end of the pressure relief pipe (401) away from the explosion-proof rotary furnace (1).

7. The explosion-proof rotary furnace according to claim 1, characterized in that: The filtering mechanism (5) further comprises: A baffle (502), a solid adsorption part (503) and a dust collection trough (504), wherein the baffle (502), the filter part (501) and the solid adsorption part (503) are connected in sequence, and the dust collection trough (504) is located at the bottom of the filter part (501) and is connected to the baffle (502) and the solid adsorption part (503); The filtering unit (501) comprises: A fixed plate (5011) and a filter screen (5012), wherein the filter screen (5012) is slidably connected to the fixed plate (5011), and the baffle (502) and the solid adsorption part (503) are both connected to the fixed plate (5011).

8. The explosion-proof rotary furnace according to claim 1, characterized in that: Also includes: A motor (15), a rotating shaft (16) and a grill (17), wherein the motor (15) is installed outside the explosion-proof rotary furnace (1), the grill (17) is located inside the baking chamber (101), and the driving end of the motor (15) is connected to the grill (17) via the rotating shaft (16).

9. The explosion-proof rotary furnace according to claim 1, characterized in that: The first monitoring unit (6), the second monitoring unit (7) and the third monitoring unit (8) have the same structure; The first monitoring unit (6) comprises: A first concentration sensor (601) and a pressure sensor (602); The fourth monitoring unit is a second concentration sensor (9).

10. A method for controlling an explosion-proof rotary furnace according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, obtaining the concentration of the gas in the first monitoring part (6), the concentration of the gas in the second monitoring part (7), and the concentration of the gas in the third monitoring part (8); if the concentration of the gas in the first monitoring part (6), the concentration of the gas in the second monitoring part (7), or the concentration of the gas in the third monitoring part (8) exceeds 90% of the first explosion preset concentration, executing S2; otherwise, executing S9; S2, opening the electric regulating valve (303) so that the inert gas in the inert gas storage tank (3) is sprayed into the first pipeline (201) through the first connecting pipe (302); S3, if the concentration of the gas in the first monitoring part (6), the concentration of the gas in the second monitoring part (7) or the concentration of the gas in the third monitoring part (8) exceeds 90% of the second explosion preset concentration, then execute S4; otherwise, execute S7; S4, opening the pressure relief valve (402) to discharge the mixed gas in the second pipeline (202); S5, if the concentration of the gas in the first monitoring part (6), the concentration of the gas in the second monitoring part (7) or the concentration of the gas in the third monitoring part (8) exceeds 80% of the first preset explosion concentration, execute S6; S6, closing the electric regulating valve (303) and the pressure relief valve (402), and executing S9; S7, if the concentration of the gas in the first monitoring part (6), the concentration of the gas in the second monitoring part (7) or the concentration of the gas in the third monitoring part (8) exceeds 80% of the first explosion preset concentration, then execute S8; otherwise, execute S3; S8, closing the electric regulating valve (303), and executing S9; S9, obtaining the pressure of the gas in the first monitoring part (6), the pressure of the gas in the second monitoring part (7), and the pressure of the gas in the third monitoring part (8); if the concentration of the pressure of the gas in the first monitoring part (6), the pressure of the gas in the second monitoring part (7), or the pressure of the gas in the third monitoring part (8) exceeds 90% of the preset pressure, executing S10; otherwise, executing S12; S10, opening the pressure relief valve (402) to discharge the mixed gas in the second pipeline (202); S11, if the concentration of the pressure of the gas in the first monitoring part (6), the pressure of the gas in the second monitoring part (7), or the pressure of the gas in the third monitoring part (8) exceeds 80% of the preset pressure; S12, closing the pressure relief valve (402).

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