Gypsum board calcination waste heat and waste material recycling system and method

Abstract

The invention discloses a waste heat and waste material recycling system for gypsum board calcination. The waste heat and waste material recycling system comprises a cooling bin, a recycling air channel, a recycling ash channel, a temperature sensor and a controller. The cooling bin is provided with a plurality of air pipes and temperature sensors, and fans are arranged at the ends of the air pipes; the recovery air duct is communicated to an air outlet of the fan and can convey high-temperature airflow into the calcining bin; an ash storage tank and a conveyor are arranged at the lower end of the ash recovery channel; the controller is electrically connected to the fan, the first valve, the conveyor and the temperature sensor; the invention further discloses a gypsum board calcination waste heat and waste material recycling method. By arranging the air pipe and the fan, heat of high-temperature coal ash can be taken away and conveyed into the calcining bin, meanwhile, the ash recycling channel and the conveyor are arranged, cooled coal ash can be recycled and conveyed into the mixing bin to be mixed with gypsum ash for use, and recycling of gypsum board calcining waste heat and coal ash is achieved.

Description

Technical Field

[0001] This invention relates to the field of gypsum board production technology, specifically to a system and method for recycling waste heat and waste materials from gypsum board calcination. Background Technology

[0002] Existing gypsum production lines often use closed storage tanks to store high-temperature coal ash materials and discharge them through pipelines. However, because high-temperature coal ash cools down slowly, it causes significant thermal damage to storage and conveying equipment. Furthermore, coal ash cannot be directly mixed with calcined gypsum powder at high temperatures. Therefore, the coal ash is usually discharged directly. During this process, the sensible heat carried by the high-temperature material is dissipated directly through the tank and lost along with the coal ash, resulting in a waste of material and thermal energy.

[0003] Therefore, the existing methods of storing and discharging high-temperature coal ash using storage tanks and pipelines have the problem of wasting materials and heat energy because the coal ash at high temperatures is difficult to mix directly with gypsum powder and needs to be discharged. Summary of the Invention

[0004] The purpose of this invention is to provide a system and method for recycling waste heat and waste materials from gypsum board calcination, in order to solve the technical problem in the prior art that it is difficult to directly mix and utilize coal ash under high temperature conditions with gypsum powder, which requires discharge and thus leads to waste of materials and heat energy.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0006] A system for recovering waste heat and waste materials from gypsum board calcination includes:

[0007] A cooling chamber is used to hold coal ash. Several air ducts are installed through the lower part of the interior of the cooling chamber. A fan is connected to the end of the air duct. The fan can guide low-temperature air through the air duct to absorb the heat of high-temperature coal ash.

[0008] The recovery air duct is connected to the air outlet of the fan and can transport the high-temperature airflow in the cooling chamber to the calcination chamber.

[0009] The bottom of the cooling chamber is provided with the ash recovery channel, and the other end of the ash recovery channel is connected to the ash storage tank. The bottom of the ash storage tank is provided with a conveyor, which can uniformly transport the cooled coal ash to the gypsum powder mixing silo.

[0010] A temperature sensor is installed inside the cooling chamber, and a first valve is installed at the connection between the cooling chamber and the recovery ash channel. The temperature sensor can detect the temperature of the coal ash.

[0011] A controller is electrically connected to the fan, the first valve, the conveyor, and the temperature sensor. The controller is used to control the opening and closing of the fan, the first valve, and the conveyor, and is able to receive the detection signal from the temperature sensor.

[0012] High-temperature coal ash is placed into the cooling chamber. The temperature sensor detects that the temperature is higher than the high-temperature threshold and can feed back the detection signal to the controller. The controller then turns on the fan to deliver the air heated by the high-temperature coal ash to the gypsum calcination chamber.

[0013] The temperature sensor detects that the coal ash temperature is below the low temperature threshold and can feed back the detection signal to the controller, so that the controller can open the first valve to discharge ash, and at the same time shut down the blower and start the conveyor to transport the ash to the gypsum powder mixing silo.

[0014] As a preferred embodiment of the present invention, a plurality of the air ducts are horizontally arranged inside the cooling chamber, and the air ducts are divided into multiple layers from top to bottom, with the projections of adjacent layers of air ducts intersecting each other on the horizontal plane.

[0015] The temperature sensor is located on the inner wall of the cooling chamber.

[0016] As a preferred embodiment of the present invention, the upper end of the cooling chamber is provided with an ash inlet, the bottom of the cooling chamber is provided with an ash outlet, the first valve is disposed in the ash outlet, and the first valve faces vertically downward.

[0017] As a preferred embodiment of the present invention, the air inlet of the fan is provided with an air inlet pipe, and the same end of a plurality of air pipes is connected to the air inlet pipe, and the air outlet of the fan is connected to the air inlet of the recovery air duct.

[0018] The recovery air duct is provided with several branch pipes at its end, and each branch pipe is provided with a distribution fan. The ends of the several branch pipes are respectively connected to different calcination chambers. The controller is electrically connected to the distribution fan to control the opening and closing of the distribution fan and adjust the power of the distribution fan.

[0019] As a preferred embodiment of the present invention, the ash storage tank includes a tank body and a support, the support supporting the tank body, the upper end of the tank body is provided with an inlet, the bottom of the tank body is provided with an outlet, the outlet is provided with a second valve, and the controller is electrically connected to the second valve to control the opening and closing of the second valve;

[0020] The ash recovery channel is inclined, with its upper inclined end connected to the first valve and its lower inclined end connected to the inlet. When the first valve is opened, the coal ash can fall downwards into the tank along the ash recovery channel.

[0021] As a preferred embodiment of the present invention, a weighing chamber is provided below the tank body, and at least three weighing support legs are provided at the bottom of the weighing chamber, which can support the weighing chamber.

[0022] The weighing support leg is used to weigh the weight of the weighing chamber.

[0023] In a preferred embodiment of the present invention, the weighing support leg includes a support rod and a sleeve rod, the sleeve rod is sleeved on the support rod, a spring is provided at the upper end of the support rod, a weighing sensor is provided at the top end of the sleeve rod, and the upper end of the spring abuts against the weighing sensor.

[0024] The controller is electrically connected to the weighing sensor to obtain the weight of the weighing bin.

[0025] As a preferred embodiment of the present invention, the top inlet of the weighing bin is connected to the outlet of the tank body through a flexible first material pipe, and the side outlet of the weighing bin is connected to the conveyor through a flexible second material pipe.

[0026] The weighing bin is equipped with a third valve at its discharge port, and the controller is electrically connected to the third valve to control its opening and closing.

[0027] As a preferred embodiment of the present invention, the conveyor includes a conveying pipe, one end of which is connected to the third valve, and the other end of which is provided with an air pump, the exhaust port of which is connected to the mixing chamber.

[0028] The weighing chamber is equipped with an air valve at its upper end, and the controller is electrically connected to the air pump and the air valve to control the opening and closing of the air pump and the air valve.

[0029] To address the aforementioned technical problems, the present invention further provides the following technical solution:

[0030] Step 100: High-temperature coal ash accumulates to the bottom of the cooling chamber and covers the air duct. The temperature sensor detects that the temperature is higher than the high temperature threshold and sends a detection signal to the controller to turn on the fan.

[0031] Step 200: The blower guides low-temperature air through the air duct to absorb the heat of high-temperature coal ash, and then transports it to the calcination chamber to preheat the gypsum powder through the recovery air duct.

[0032] Step 300: The temperature sensor detects that the temperature is below the low temperature threshold, sends a detection signal to the controller to shut down the fan, and opens the first valve to start the conveyor to transport the low-temperature coal ash to the gypsum powder mixing silo.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] This invention, by setting up air ducts and fans, can remove the heat from high-temperature coal ash and transport it to the calcination chamber. At the same time, it is equipped with a recovery ash channel and a conveyor to recover and transport the cooled coal ash to the mixing chamber for mixing with gypsum ash, thus realizing the recovery and utilization of waste heat from gypsum board calcination and coal ash. Attached Figure Description

[0035] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0036] Figure 1 A schematic diagram of the waste heat and waste material recycling system for gypsum board calcination provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the cooling chamber and recovery air duct structure provided in an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the structure of the recycling ash channel provided in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the lower cross-sectional structure of the cooling chamber provided in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the weighing support leg structure provided in an embodiment of the present invention.

[0041] The labels in the diagram represent the following:

[0042] 1-Cooling chamber; 2-Recovery air duct; 3-Recovery ash duct; 4-Weighing sensor; 5-Controller;

[0043] 11-Air duct; 12-Fan; 13-First valve; 14-Ash inlet; 15-Ash outlet; 21-Branch pipe; 31-Ash storage tank; 32-Conveyor; 33-Tank body; 34-Support; 35-Second valve; 36-Weighing bin; 37-Weighing support leg;

[0044] 121-Air inlet pipe; 211-Distribution fan; 321-Conveying pipe; 322-Air pump; 331-Inlet; 332-Outlet; 361-First material pipe; 362-Second material pipe; 363-Third valve; 364-Air valve; 371-Support rod; 372-Sleeve rod; 373-Spring; 374-Weighing sensor. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] like Figure 1 As shown, the present invention provides a system for recycling waste heat and waste materials from gypsum board calcination, comprising:

[0047] Cooling chamber 1 is used to hold coal ash. Several air ducts 11 are installed through the lower part of the interior of cooling chamber 1. Fans 12 are connected to the ends of the air ducts 11. Fans 12 can guide low-temperature air through the air ducts 11 to absorb the heat of high-temperature coal ash.

[0048] Recovery air duct 2 is connected to the air outlet of fan 12. Recovery air duct 2 can transport the high-temperature airflow in cooling chamber 1 to calcination chamber.

[0049] The bottom of the cooling chamber 1 is provided with a recycling ash channel 3. The other end of the recycling ash channel 3 is connected to the ash storage tank 31. The bottom of the ash storage tank 31 is provided with a conveyor 32, which can uniformly transport the cooled coal ash to the gypsum powder mixing silo.

[0050] Temperature sensor 4 is installed inside cooling chamber 1. A first valve 13 is installed at the connection between cooling chamber 1 and recovery ash channel 3. Temperature sensor 4 can detect the temperature of coal ash.

[0051] The controller 5 is electrically connected to the fan 12, the first valve 13, the conveyor 32 and the temperature sensor 4. The controller 5 is used to control the opening and closing of the fan 12, the first valve 13 and the conveyor 32, and can receive the detection signal from the temperature sensor 4.

[0052] Among them, high-temperature coal ash is placed into cooling chamber 1. Temperature sensor 4 detects that the temperature is higher than the high temperature threshold and can feed back the detection signal to controller 5. Controller 5 then turns on fan 12 to deliver the air heated by the high-temperature coal ash to gypsum calcination chamber.

[0053] Temperature sensor 4 detects that the coal ash temperature is below the low temperature threshold and can send a detection signal to controller 5 so that controller 5 can open the first valve 13 to discharge ash, and at the same time turn off the blower 12 and turn on the conveyor 31 to transport the ash to the gypsum powder mixing silo.

[0054] In this embodiment, several air ducts 11 are installed in the cooling chamber 1, and a fan 12 is installed at one end of the air duct 11. The air outlet of the fan 12 is connected to a recovery air duct 2. The end of the recovery air duct 2 is connected to the gypsum powder calcination chamber. A recovery ash duct 3 is connected to the lower end of the cooling chamber 1. The recovery ash duct 3 is connected to the ash storage chamber 31. The bottom of the ash storage chamber 31 is connected to the gypsum powder mixing chamber through a conveyor 32. A temperature sensor 4 is installed in the cooling chamber 1. A controller 5 is electrically connected to the fan 12, the first valve 13, the conveyor 32, and the temperature sensor 4. After the high-temperature coal ash accumulates in the cooling chamber 1, the temperature is greater than the high temperature threshold of the temperature sensor 4. The temperature sensor 4 can feed back a detection signal to the controller 5 to turn on the fan 12 and deliver the air heated by the high-temperature coal ash to the gypsum calcination chamber. When the temperature sensor 4 detects that the coal ash temperature is lower than the low temperature threshold, it can feed back a detection signal to the controller 5 to open the first valve 13 to discharge the ash. At the same time, the fan 12 is turned off and the conveyor 31 is turned on to transport the ash to the gypsum powder mixing chamber.

[0055] In this embodiment, by setting up duct 11 and fan 12, low-temperature air can be guided by fan 12 to absorb the heat of high-temperature coal ash, and then transported to the calcination chamber waste heat gypsum powder through recovery duct 2. By setting up recovery ash channel 3, cooled coal ash can be transported to ash storage silo 31, and then transported to powder mixing silo by conveyor 32 to be mixed with calcined gypsum powder. At the same time, temperature sensor 4 in cooling silo 1 can detect coal ash temperature and can feed back a signal to controller 5 to turn on fan 12 when high-temperature coal ash is put in. When the temperature is lower than the low temperature threshold, fan 12 is turned off and first valve 13 is opened to discharge ash, thus realizing the recovery and utilization of coal ash and waste heat.

[0056] In order to ensure that coal ash can fall smoothly and accumulate at the bottom of the cooling chamber 1, and to avoid the formation of dead space between the upper and lower air ducts 11, which would make it difficult for coal ash to fall, the following preferred embodiments are proposed.

[0057] like Figures 4 to 5 As shown, several air ducts 11 are horizontally installed inside the cooling chamber 1. The air ducts 11 are divided into multiple layers from top to bottom, and the projections of adjacent layers of air ducts 11 on the horizontal plane are intersected.

[0058] Temperature sensor 4 is located on the inner wall of cooling chamber 1.

[0059] Specifically, the staggered arrangement of adjacent air ducts 11 allows coal ash to be discharged to both sides in a staggered manner when passing through the air ducts 11, which is conducive to the discharge of gas and avoids concentrated blockage.

[0060] The temperature sensor 4 is located on the inner wall of the cooling chamber 1, which is far away from the central air duct 11. This avoids the temperature sensor 4 being too close to the air duct 11, which would cause the temperature sensor 4 to detect the temperature drop in the air duct 11 and shut down the fan 12 in advance, while the temperature of the coal ash on the side is too high.

[0061] To achieve the installation of the first valve 1, the following preferred embodiments are proposed.

[0062] like Figure 2 As shown, the upper end of the cooling chamber 1 is provided with an ash inlet 14, the bottom of the cooling chamber 1 is provided with an ash outlet 15, and the first valve 13 is provided in the ash outlet 15, and the first valve 13 is vertically downward.

[0063] Specifically, the first valve 13 is vertically downward, which allows coal ash to fall under the influence of gravity when it is opened.

[0064] In addition, existing downward-facing valves usually have an agitator installed to prevent excessive material from being squeezed and difficult to fall, in order to ensure the smooth descent of the material. In this embodiment, an agitator can also be installed below the air duct 11 to ensure the smooth descent of the coal ash, which is a commonly used technical means.

[0065] Currently, gypsum calcination may involve multiple calcination chambers. The amount of heat required for preheating varies depending on the amount of gypsum powder in each chamber. Therefore, in order to distribute the waste heat as rationally as possible, the following preferred embodiments are proposed.

[0066] like Figure 2 As shown, the air inlet of the fan 12 is provided with an air inlet pipe 121, and the same end of several air pipes 11 is connected to the air inlet pipe 121. The air outlet of the fan 12 is connected to the air inlet of the recovery air duct 2.

[0067] The end of the recovery air duct 2 is provided with several branch pipes 21, each branch pipe 21 is provided with a distribution fan 211, and the ends of the several branch pipes 21 are respectively connected to different calcination chambers. The controller 5 is electrically connected to the distribution fan 211 to control the opening and closing of the distribution fan 211 and adjust the power of the distribution fan 211.

[0068] Specifically, the blower 12 delivers the hot air in the air duct 11 to the recovery air duct 2. By adjusting the power of multiple distribution blowers 211 through the controller, the hot air can be diverted to preheat different calcination chambers.

[0069] In order to enable coal ash to fall into the ash storage bin 31 through the ash recovery channel 3, the following preferred embodiments are proposed.

[0070] like Figure 3As shown, the ash storage tank 31 includes a tank body 33 and a support 34. The support 34 supports the tank body 33. The upper end of the tank body 33 is provided with an inlet 331, and the bottom of the tank body 33 has an outlet 332. The outlet 332 is provided with a second valve 35. The controller 5 is electrically connected to the second valve 35 to control the opening and closing of the second valve 35.

[0071] The recovery ash channel 3 is inclined, with the upper end of the inclined recovery ash channel 3 connected to the first valve 13 and the lower end of the inclined recovery ash channel 3 connected to the inlet 331. When the first valve 13 is opened, the coal ash can fall down into the tank 33 along the recovery ash channel 3.

[0072] Specifically, the ash recovery channel 3 is inclined, allowing coal ash to fall from the inlet 331 into the tank 33 through the ash recovery channel 3. The second valve 35 is used to control the opening and closing of the tank 33.

[0073] When cooling coal ash is mixed with calcined gypsum powder, it is necessary to add the powder in a quantitative manner according to the amount of gypsum powder. Therefore, the following preferred embodiments are proposed.

[0074] like Figure 3 As shown, a weighing chamber 36 is provided below the tank body 33, and at least three weighing support legs 37 are provided at the bottom of the weighing chamber 36, which can support the weighing chamber 36.

[0075] Among them, the weighing support leg 37 is used to weigh the weight of the weighing chamber 36.

[0076] The weighing support leg 37 includes a support rod 371 and a sleeve rod 372. The sleeve rod 372 is sleeved on the support rod 371. A spring 373 is provided at the upper end of the support rod 371. A weighing sensor 374 is provided at the top of the sleeve rod 372. The upper end of the spring 373 presses against the weighing sensor 374.

[0077] The controller 5 is electrically connected to the weighing sensor 374 to obtain the weight of the weighing chamber 36.

[0078] Specifically, after the coal ash is discharged into the weighing bin 36, it is weighed and quantified by the weighing sensor 374, and then transported to the mixing bin by the conveyor 32.

[0079] The weighing sensor 374 measures the total weight of the weighing bin 36. Therefore, the weight of the coal ash is obtained by subtracting the weight of the weighing bin 36 itself from the weight measured by the weighing sensor 374. After obtaining the required weight of coal ash, the second valve 35 needs to be closed to prevent the coal ash from falling, thereby realizing the quantitative weighing of coal ash.

[0080] During weighing, the spring 373 is compressed under the pressure of the coal ash, and the weighing chamber 36 will also partially descend. In order to accommodate the descent of the weighing chamber 36, the following preferred embodiment is proposed.

[0081] like Figure 3 As shown, the top inlet of the weighing bin 36 is connected to the outlet of the tank body 33 through a flexible first material pipe 361, and the side outlet of the weighing bin 36 is connected to the conveyor 31 through a flexible second material pipe 362.

[0082] The weighing chamber 36 is equipped with a third valve 363 at its discharge port. The controller 5 is electrically connected to the third valve 363 to control the opening and closing of the third valve 363.

[0083] Specifically, the first material pipe 361 and the second material pipe 362 are flexible pipes that can adapt to the lifting and lowering of the weighing bin 36. In practice, the first material pipe 361 and the second material pipe 362 can be partially lengthened as redundancy.

[0084] To achieve the conveying function of conveyor 32, the following preferred embodiments are proposed.

[0085] like Figure 3 As shown, the conveyor 32 includes a conveying pipe 321, one end of which is connected to a third valve 363, and the other end of which is equipped with an air pump 322. The exhaust port of the air pump 322 is connected to the mixing chamber.

[0086] The weighing chamber 36 is equipped with an air valve 364 at its upper end. The controller 5 is electrically connected to the air pump 322 and the air valve 364 to control the opening and closing of the air pump 322 and the air valve 364.

[0087] Specifically, the air pump 322 can pump and transport coal ash to the mixing chamber through the conveying pipe 321. During the pumping process, in order to balance the air pressure in the weighing chamber 36, the air valve 364 needs to be opened.

[0088] Based on the above embodiments, a method for recycling waste heat and waste materials from gypsum board calcination is provided, comprising the following steps:

[0089] Step 100: High-temperature coal ash accumulates to the bottom of the cooling chamber and covers the air duct. The temperature sensor detects that the temperature is higher than the high temperature threshold and sends a detection signal to the controller to turn on the fan.

[0090] Step 200: The blower guides low-temperature air through the air duct to absorb the heat of high-temperature coal ash, and then transports it to the calcination chamber to preheat the gypsum powder through the recovery air duct.

[0091] Step 300: The temperature sensor detects that the temperature is below the low temperature threshold, sends a detection signal to the controller to shut down the fan, and opens the first valve to start the conveyor to transport the low-temperature coal ash to the gypsum powder mixing silo.

[0092] In this embodiment, when in use, high-temperature coal ash is transported to the cooling chamber 1 and accumulates at the bottom of the cooling chamber 1. Temperature sensor 4 detects that the temperature is higher than the threshold and sends a feedback signal to the controller to turn on the fan 21. The fan 12 draws low-temperature air through the air duct 11 to absorb the heat of the high-temperature coal ash.

[0093] Then, the heated coal ash is transported to the recovery air duct 2 by the blower 12. The power of multiple distribution blowers 211 is adjusted by the controller 5 to divert the high-temperature air and transport it to each calcination chamber to preheat the gypsum powder.

[0094] After the high-temperature coal ash is cooled, the temperature sensor 4 detects that the temperature is below the threshold and sends a feedback signal to the controller 5 to shut down the fan 12 and open the first valve 13. The coal ash falls into the ash storage tank 31 along the recovery ash channel 3.

[0095] The controller 5 opens the second valve 35 to allow the coal ash to fall into the weighing chamber 36. Based on the weight of the gypsum powder in the mixing chamber, the weighing sensor 374 weighs the required weight of coal ash and sends a signal back to the controller 5 to close the second valve 35 and open the third valve 364 and the air valve 364 so that the coal ash can be drawn into the mixing chamber by the air pump 322.

[0096] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A system for recovering and utilizing waste heat and waste materials from gypsum board calcination, characterized in that, include: Cooling chamber (1), the cooling chamber (1) is used to hold coal ash, and several air ducts (11) are installed through the lower end of the interior of the cooling chamber (1). A fan (12) is connected to the end of the air duct (11). The fan (12) can guide low temperature air through the air duct (11) to absorb the heat of high temperature coal ash. The recovery air duct (2) is connected to the air outlet of the fan (12) and can transport the high-temperature airflow in the cooling chamber (1) to the calcining chamber. The bottom of the cooling chamber (1) is provided with the recycling ash channel (3), and the other end of the recycling ash channel (3) is connected to the ash storage tank (31). The bottom of the ash storage tank (31) is provided with a conveyor (32), which can uniformly transport the cooled coal ash to the gypsum powder mixing silo. Temperature sensor (4), a temperature sensor (4) is installed in the cooling chamber (1), a first valve (13) is installed at the connection between the cooling chamber (1) and the recycling ash channel (3), and the temperature sensor (4) can detect the temperature of coal ash; The controller (5) is electrically connected to the fan (12), the first valve (13), the conveyor (32) and the temperature sensor (4). The controller (5) is used to control the opening and closing of the fan (12), the first valve (13) and the conveyor (32), and can receive the detection signal of the temperature sensor (4). High-temperature coal ash is placed into the cooling chamber (1). The temperature sensor (4) detects that the temperature is higher than the high temperature threshold and can feed back the detection signal to the controller (5). The controller (5) then turns on the fan (12) to deliver the air heated by the high-temperature coal ash to the gypsum calcination chamber. The temperature sensor (4) detects that the coal ash temperature is lower than the low temperature threshold and can feed back the detection signal to the controller (5) so that the controller (5) can open the first valve (13) to discharge ash, and at the same time turn off the blower (12) and turn on the conveyor (31) to transport to the gypsum powder mixing silo.

2. The waste heat and waste material recovery system for gypsum board calcination according to claim 1, characterized in that, Several of the aforementioned air ducts (11) are horizontally arranged inside the cooling chamber (1). The air ducts (11) are divided into multiple layers from top to bottom, and the projections of adjacent layers of air ducts (11) on the horizontal plane are intersecting. The temperature sensor (4) is located on the inner wall of the cooling chamber (1).

3. The waste heat and waste material recovery system for gypsum board calcination according to claim 2, characterized in that, The upper end of the cooling chamber (1) is provided with an ash inlet (14), and the bottom of the cooling chamber (1) is provided with an ash outlet (15). The first valve (13) is located in the ash outlet (15) and the first valve (13) is vertically downward.

4. The waste heat and waste material recovery system for gypsum board calcination according to claim 3, characterized in that, The air inlet of the fan (12) is provided with an air inlet pipe (121), and the same end of several air pipes (11) is connected to the air inlet pipe (121). The air outlet of the fan (12) is connected to the air inlet of the recovery air duct (2). The end of the recovery air duct (2) is provided with several branch pipes (21), each of the branch pipes (21) is provided with a distribution fan (211), and the ends of the several branch pipes (21) are respectively connected to different calcination chambers. The controller (5) is electrically connected to the distribution fan (211) to control the opening and closing of the distribution fan (211) and adjust the power of the distribution fan (211).

5. A waste heat and waste material recovery system for gypsum board calcination according to claim 1, characterized in that, The ash storage tank (31) includes a tank body (33) and a support (34). The support (34) supports the tank body (33). The upper end of the tank body (33) is provided with an inlet (331). The bottom of the tank body (33) has an outlet (332). The outlet (332) is provided with a second valve (35). The controller (5) is electrically connected to the second valve (35) to control the opening and closing of the second valve (35). The recycling ash channel (3) is inclined, with the upper inclined end of the recycling ash channel (3) connected to the first valve (13) and the lower inclined end of the recycling ash channel (3) connected to the inlet (331). When the first valve (13) is opened, the coal ash can fall down into the tank (33) along the recycling ash channel (3).

6. A waste heat and waste material recovery system for gypsum board calcination according to claim 5, characterized in that, A weighing chamber (36) is provided below the tank body (33), and at least three weighing support legs (37) are provided at the bottom of the weighing chamber (36), which can support the weighing chamber (36). The weighing support leg (37) is used to weigh the weighing chamber (36).

7. A waste heat and waste material recovery system for gypsum board calcination according to claim 6, characterized in that, The weighing support leg (37) includes a support rod (371) and a sleeve rod (372). The sleeve rod (372) is sleeved on the support rod (371). A spring (373) is provided at the upper end of the support rod (371). A weighing sensor (374) is provided at the top inside the sleeve rod (372). The upper end of the spring (373) presses against the weighing sensor (374). The controller (5) is electrically connected to the weighing sensor (374) to obtain the weight of the weighing bin (36).

8. A waste heat and waste material recovery system for gypsum board calcination according to claim 7, characterized in that, The top inlet of the weighing bin (36) is connected to the outlet of the tank (33) through a flexible first material pipe (361), and the side outlet of the weighing bin (36) is connected to the conveyor (31) through a flexible second material pipe (362). The weighing bin (36) is equipped with a third valve (363) at its discharge port. The controller (5) is electrically connected to the third valve (363) to control the opening and closing of the third valve (363).

9. A waste heat and waste material recovery system for gypsum board calcination according to claim 8, characterized in that, The conveyor (32) includes a conveying pipe (321), one end of which is connected to the third valve (363), and the other end of which is equipped with an air pump (322), the exhaust port of which is connected to the mixing chamber; The weighing chamber (36) is equipped with an air valve (364) at its upper end. The controller (5) is electrically connected to the air pump (322) and the air valve (364) to control the opening and closing of the air pump (322) and the air valve (364).

10. A method for recovering and utilizing waste heat and waste materials from the calcination of gypsum board according to any one of claims 1-9, characterized in that, Includes the following steps: Step 100: High-temperature coal ash accumulates to the bottom of the cooling chamber and covers the air duct. The temperature sensor detects that the temperature is higher than the high temperature threshold and sends a detection signal to the controller to turn on the fan. Step 200: The blower guides low-temperature air through the air duct to absorb the heat of high-temperature coal ash, and then transports it to the calcination chamber to preheat the gypsum powder through the recovery air duct. Step 300: The temperature sensor detects that the temperature is below the low temperature threshold, sends a detection signal to the controller to shut down the fan, and opens the first valve to start the conveyor to transport the low-temperature coal ash to the gypsum powder mixing silo.

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