Waste heat utilization device for PVB resin production

Abstract

The invention relates to the field of waste heat utilization, in particular to a waste heat utilization device for PVB resin production. Most of existing production devices are difficult to recycle heat energy generated in the production process, energy consumption is caused to a great extent, and the production cost is increased. A waste heat utilization device for PVB resin production comprises a bottom frame and the like. The bottom frame is fixedly connected with a stirring kettle, the bottom of the stirring kettle is provided with a kettle door, the top of the stirring kettle is fixedly connected with a thermal insulation box, and the thermal insulation box is rotatably connected with a box cover. The hot water can preheat the raw materials, then the water enters the water tank again, heat in the stirring cylinder can be recycled, the raw materials in the feeding hopper can be preheated, the raw materials in the stirring kettle are cooled through the water, and meanwhile the water is preheated, so that the energy efficiency is improved, the production cost is reduced, the cooling water can be recycled, and the energy consumption is reduced. The water resource waste is reduced.

Description

Technical Field

[0001] This invention relates to the field of waste heat utilization, and more particularly to a waste heat utilization device for PVB resin production. Background Technology

[0002] PVB resin is an important polymer material widely used in automotive glass lamination, coatings, adhesives, and other fields. Current PVB resin production processes require heating the raw materials first, followed by cooling after homogenization. This entire process generates a large amount of heat, and existing production equipment struggles to recover and utilize this heat, resulting in significant energy consumption and increased production costs. Summary of the Invention

[0003] To address the shortcomings or disadvantages of the existing technology, this invention provides a waste heat recovery device for PVB resin production, which can recover heat from the mixing tank and preheat the raw materials, thereby improving energy efficiency and reducing production costs.

[0004] A waste heat recovery device for PVB resin production includes a base frame, a mixing vessel fixedly connected to the base frame, a vessel door at the bottom of the mixing vessel, a heat insulation box fixedly connected to the top of the mixing vessel, a cover rotatably connected to the heat insulation box, four perforated paddle frames fixedly connected to the bottom of the cover, each perforated paddle frame having a guide slot, all four perforated paddle frames being located inside the heat insulation box, a discharge valve fixedly connected to the heat insulation box, a mixing cylinder fixedly connected to the top of the heat insulation box, a mounting ring fixedly connected to the top of the mixing cylinder, a feed hopper fixedly connected to the mounting ring, the feed hopper having a water chamber and an air chamber, and a discharge port at the bottom of the feed hopper, the mounting ring being connected to the heat insulation box... A top cover is fixedly connected between the feeding hoppers. Two water pipes are fixedly connected between the insulation box and the feeding hopper. The two water pipes are symmetrically arranged. The insulation box is connected to the water cavity in the feeding hopper through the two water pipes. A drain pipe is fixedly connected to the feeding hopper. The water cavity in the feeding hopper is connected to the drain pipe. A transfer box is fixedly connected to the outer wall of the mixing vessel. The transfer box is fixedly connected to the drain pipe and is connected to the drain pipe. A water tank is fixedly connected to the outer wall of the mixing vessel. The transfer box is fixedly connected to the water tank and is connected to the water tank. A hot stirring mechanism is provided on the mounting ring frame. A cooling stirring mechanism is provided inside the mixing vessel.

[0005] Optionally, the thermal stirring mechanism includes a dual-shaft motor, which is fixedly connected to the mounting ring frame. A heating stirring paddle is fixedly connected to the output shaft at the bottom of the dual-shaft motor. The heating stirring paddle is located inside the stirring cylinder, and its bottom is fixedly connected to the box cover. A discharge protrusion is fixedly connected to the output shaft at the top of the dual-shaft motor, and the discharge protrusion is located inside the discharge port of the feed hopper.

[0006] Optionally, the cooling and stirring mechanism includes a motor frame, which is fixedly connected to the outer wall of the stirring vessel. A servo motor is fixedly connected to the motor frame. A shaft tube is rotatably connected inside the stirring vessel. A ring tube is rotatably connected to one end of the shaft tube, and the shaft tube communicates with the ring tube. The ring tube is fixedly connected to the water tank, and the ring tube communicates with the water tank. Three hollow stirring paddles are fixedly connected to the shaft tube, and the shaft tube communicates with all three hollow stirring paddles. A bent pipe is rotatably connected to one end of the shaft tube. The shaft tube is connected to the bend tube. A wheel frame is fixedly connected to the shaft tube. The wheel frame is located inside the bend tube. A connecting rod is rotatably connected to the wheel frame. A plug frame is slidably connected inside the bend tube. The plug frame is rotatably connected to the connecting rod. Four one-way water inlet valves are fixedly connected to the plug frame. A pipe frame is fixedly connected to the outer wall of the mixing vessel. A water pipe is fixedly connected between the insulation box and the bend tube. The insulation box and the bend tube are connected through the water pipe. The water pipe is fixedly connected to the pipe frame.

[0007] Optionally, it also includes a flue gas preheating mechanism, which is disposed on the stirred tank. The flue gas preheating mechanism includes annular tubes. Two annular tubes are fixedly connected between the stirred tank and the feed hopper. The two annular tubes are symmetrically arranged. The gas chamber in the stirred tank and the feed hopper are connected through the two annular tubes. A fixing frame is fixedly connected to the lower part of the inner wall of the two annular tubes. A top plug is slidably connected to the fixing frame. Both top plugs are provided with guide arc surfaces. A one-way air valve is fixedly connected to the top plug. A return spring is connected between the top plug and the fixing frame. The return spring is sleeved on the top plug.

[0008] The beneficial effects of this invention are as follows: First, the dual-axis motor drives the heating and stirring paddle to stir and heat the raw materials in the stirring tank. After the raw materials are mixed evenly, they fall downwards into the stirring vessel. Simultaneously, the servo motor drives three hollow stirring paddles to stir the raw materials. The water in the hollow stirring paddles cools the raw materials in the stirring vessel. The plug frame drives four one-way water inlet valves to continuously pump water from the bend into the insulation box. The heating stirring paddle heats the water in the insulation box, and the four hollow paddle frames stir the water in the insulation box. The uniform heating ensures that the water in the insulated box is heated more evenly. Hot water enters the water chamber in the feed hopper to preheat the raw materials in the feed hopper. Then, the water in the water chamber in the feed hopper enters the transfer box, and then the water in the transfer box re-enters the water tank. In this way, heat in the mixing tank can be recovered, the raw materials in the feed hopper can be preheated, and the raw materials in the mixing vessel can be cooled by water. At the same time, the water is preheated, thereby improving energy efficiency, reducing production costs, and also enabling the recycling of cooling water to reduce water waste.

[0009] When the shaft tube drives the three hollow agitators to rotate, the three hollow agitators continuously push the two top plugs to move away from the shaft tube, thereby continuously drawing the hot air in the mixing vessel into the air chamber in the feed hopper through the two annular tubes. In this way, the hot air in the mixing vessel can preheat the raw materials in the feed hopper, further improving the waste heat utilization efficiency and reducing production costs. In addition, by intermittently discharging the hot air in the mixing vessel, the evaporation of moisture in the mixing vessel can be accelerated, while the air pressure in the mixing vessel can be balanced. Attached Figure Description

[0010] Figure 1 A three-dimensional structural diagram of the present invention.

[0011] Figure 2 A first partial cross-sectional three-dimensional structural schematic diagram of the cooling and stirring mechanism of the present invention.

[0012] Figure 3 This invention Figure 2 A magnified three-dimensional structural diagram of A in the middle.

[0013] Figure 4 A partial cross-sectional three-dimensional structural schematic diagram of the thermal stirring mechanism of the present invention.

[0014] Figure 5 A cross-sectional three-dimensional structural diagram of the shaft tube and hollow stirring impeller of the present invention.

[0015] Figure 6 A second partial cross-sectional three-dimensional structural schematic diagram of the cooling and stirring mechanism of the present invention.

[0016] Figure 7 This invention Figure 7 A magnified three-dimensional structural diagram of B.

[0017] Figure 8 A cross-sectional three-dimensional structural schematic diagram of the stirred tank and the annular tube of the present invention.

[0018] Figure 9 This invention Figure 9 A magnified three-dimensional structural diagram of C.

[0019] Figure 10 This invention provides a cross-sectional perspective view of the mounting ring, feed hopper, and discharge convex ball.

[0020] Figure 11 A three-dimensional structural diagram showing the disassembled structure of the insulated box, box cover, and hollowed-out paddle frame of this invention.

[0021] The markings in the attached diagram are: 1: base frame, 2: mixing vessel, 21: vessel door, 3: insulated box, 31: box cover, 32: perforated paddle frame, 33: discharge valve, 4: mixing cylinder, 5: mounting ring frame, 6: feed hopper, 61: top cover, 7: water pipe, 8: drain pipe, 9: transfer box, 10: water tank, 1101: dual-shaft motor, 1102: heating mixing paddle, 1103: discharge ball, 1201: motor frame, 12 02: Servo motor, 1203: Shaft tube, 12031: Ring tube, 1204: Hollow agitator, 1205: Bend tube, 1206: Wheel frame, 1207: Connecting rod, 1208: Plug frame, 1209: One-way water inlet valve, 1210: Pipe frame, 1211: Water pipe, 1301: Ring tube, 1302: Fixing frame, 1303: Top plug, 1304: One-way air valve, 1305: Return spring. Detailed Implementation

[0022] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, welding, and bonding that are mature in the prior art, and will not be described in detail here.

[0023] Example 1 A waste heat recovery device for PVB resin production, such as Figures 1-11As shown, the system includes a base frame 1, on which a stirring vessel 2 is bolted. The bottom of the stirring vessel 2 has a vessel door 21. The top of the stirring vessel 2 is bolted to an insulated box 3, on which a box cover 31 is rotatably connected. Four hollowed-out paddle frames 32 are bolted to the bottom of the box cover 31. Each hollowed-out paddle frame 32 has a guide slot. All four hollowed-out paddle frames 32 are located inside the insulated box 3. A discharge valve 33 is flanged to the insulated box 3. A stirring cylinder 4 is welded to the top of the insulated box 3. A mounting ring frame 5 is bolted to the top of the stirring cylinder 4. A feed hopper 6 is bolted to the mounting ring frame 5. The feed hopper 6 has a water chamber and an air chamber inside, and a discharge port at the bottom. The mounting ring frame 5 and the feed hopper 6 are connected... A top cover 61 is bolted to the insulated box 3 and the feed hopper 6. Two water pipes 7 are connected by flanges and are symmetrically arranged. The insulated box 3 is connected to the water cavity in the feed hopper 6 through the two water pipes 7. A drain pipe 8 is bolted to the flange on the feed hopper 6 and is connected to the drain pipe 8. A transfer box 9 is fixedly connected to the outer wall of the mixing vessel 2 and is fixedly connected to the drain pipe 8. The transfer box 9 is connected to the drain pipe 8 and is connected to the drain pipe 8. A water tank 10 is bolted to the outer wall of the mixing vessel 2 and is fixedly connected to the water tank 10. The transfer box 9 is connected to the water tank 10 and is connected to the water tank 10. A hot stirring mechanism is provided on the mounting ring 5 and a cooling stirring mechanism is provided inside the mixing vessel 2.

[0024] The thermal stirring mechanism includes a dual-shaft motor 1101, which is bolted to the mounting ring 5. A heating stirring paddle 1102 is welded to the output shaft at the bottom of the dual-shaft motor 1101. The heating stirring paddle 1102 is located inside the stirring cylinder 4, and its bottom is fixedly connected to the box cover 31. A discharge protrusion 1103 is welded to the output shaft at the top of the dual-shaft motor 1101, and the discharge protrusion 1103 is located inside the discharge port of the feed hopper 6.

[0025] The cooling and stirring mechanism includes a motor frame 1201, which is fixedly connected to the outer wall of the stirring vessel 2. A servo motor 1202 is bolted to the motor frame 1201. A shaft tube 1203 is rotatably connected inside the stirring vessel 2. One end of the shaft tube 1203 is rotatably connected to a ring tube 12031, which communicates with the ring tube 12031. The ring tube 12031 is fixedly connected to the water tank 10, which also communicates with the water tank 10. Three hollow stirring paddles 1204 are welded onto the shaft tube 1203, which communicates with all three hollow stirring paddles 1204. One end of the shaft tube 1203 is rotatably connected to a bent pipe 1205. 3 is connected to the bend 1205. A wheel frame 1206 is fixedly connected to the shaft tube 1203. The wheel frame 1206 is located inside the bend 1205. A connecting rod 1207 is rotatably connected to the wheel frame 1206. A plug frame 1208 is slidably connected inside the bend 1205. The plug frame 1208 is rotatably connected to the connecting rod 1207. Four one-way water inlet valves 1209 are connected to the plug frame 1208 through flanges. A pipe frame 1210 is welded to the outer wall of the stirring tank 2. A water pipe 1211 is connected between the insulation box 3 and the bend 1205 through a flange. The insulation box 3 and the bend 1205 are connected through the water pipe 1211. The water pipe 1211 is fixedly connected to the pipe frame 1210.

[0026] First, the operator introduces water into the water tank 10. The water in the water tank 10 flows through the ring pipe 12031 and the shaft pipe 1203 into the three hollow agitator paddles 1204. Then, the water in the three hollow agitator paddles 1204 flows through the shaft pipe 1203 into the bent pipe 1205. Next, the operator feeds the raw material into the feed hopper 6 and starts the dual-axis motor 1101 and the servo motor 1202. The two output shafts of the dual-axis motor 1101 drive the heating agitator paddle 1102 and the feeding convex ball 1103 to rotate, respectively. As the feeding convex ball 1103 rotates, the raw material in the feed hopper 6 gradually falls into the mixing cylinder 4. The heating agitator paddle 1204... 102 will stir and heat the raw materials in the mixing tank 4. After the raw materials are mixed evenly, the discharge valve 33 will open, and the raw materials in the mixing tank 4 will fall downward into the mixing vessel 2. At the same time, the servo motor 1202 will drive the shaft tube 1203 to rotate. The rotation of the shaft tube 1203 will drive the wheel frame 1206 and the three hollow stirring paddles 1204 to rotate. The raw materials will be stirred in the three hollow stirring paddles 1204. During the stirring process, the water in the hollow stirring paddles 1204 will cool down the raw materials in the mixing vessel 2. The rotation of the wheel frame 1206 will drive the connecting rod 1207 to move up and down reciprocally. The up and down reciprocating movement of the connecting rod 1207 will drive the stopper 1208. The reciprocating movement of the stopper 1208 causes the four one-way inlet valves 1209 to move up and down, continuously pumping water from the bend 1205 into the water pipe 1211. As water is continuously pumped into the bend 1205, it enters the insulated chamber 3. The dual-shaft motor 1101 drives the heating and stirring paddle 1102 to continue rotating, heating the water in the insulated chamber 3. The rotation of the heating and stirring paddle 1102 also causes the chamber cover 31 to rotate, which in turn causes all four perforated paddle holders 32 to rotate, stirring the water in the insulated chamber 3. The uniform heating ensures that the water in the insulated box 3 is heated more evenly. The heated water in the insulated box 3 enters the water chamber in the feed hopper 6 through two water pipes 7. The hot water preheats the raw materials in the feed hopper 6. Then, the water in the water chamber in the feed hopper 6 enters the transfer box 9 through the drain pipe 8. The water in the transfer box 9 then re-enters the water tank 10. In this way, the heat in the mixing tank 4 can be recovered, the raw materials in the feed hopper 6 can be preheated, and the raw materials in the mixing vessel 2 can be cooled by water. At the same time, the water is preheated, thereby improving energy efficiency, reducing production costs, and also enabling the recycling of cooling water to reduce water waste.

[0027] Example 2 Based on Example 1, such as Figures 8-9As shown, it also includes a flue gas preheating mechanism, which is installed on the stirring vessel 2. The flue gas preheating mechanism includes annular pipes 1301. Two annular pipes 1301 are connected between the stirring vessel 2 and the feed hopper 6 via flanges. The two annular pipes 1301 are symmetrically arranged. The gas chambers in the stirring vessel 2 and the feed hopper 6 are connected through the two annular pipes 1301. Fixing frames 1302 are welded to the lower part of the inner wall of the two annular pipes 1301. Top plugs 1303 are slidably connected to the fixing frames 1302. Both top plugs 1303 are provided with guide arc surfaces. One-way air valves 1304 are connected to the top plugs 1303 via flanges. A return spring 1305 is connected between the top plugs 1303 and the fixing frames 1302 via hooks. The return spring 1305 is sleeved on the top plugs 1303.

[0028] When the shaft tube 1203 drives the three hollow impellers 1204 to rotate, the hollow impellers 1204 will contact the top plug 1303. The rotation of the hollow impellers 1204 will push the top plug 1303 to move away from the shaft tube 1203, and the return spring 1305 will be compressed. The top plug 1303 will drive the one-way valve 1304 to move away from the shaft tube 1203. As the hollow impellers 1204 continue to rotate, the hollow impellers 1204 will disengage from the top plug 1303, and the return spring 1305 will return to its original position. The return spring 1305 will then move the top plug 1303 away from the one-way valve 1304. 4 and the top plug 1303 move towards the shaft tube 1203 to reset. This process is repeated so that the three hollow stirring paddles 1204 continuously push the two top plugs 1303 away from the shaft tube 1203, thereby continuously drawing the hot air in the stirring vessel 2 into the air chamber in the feed hopper 6 through the two annular tubes 1301. In this way, the hot air in the stirring vessel 2 can preheat the raw materials in the feed hopper 6, further improving the waste heat utilization efficiency and reducing production costs. In addition, by intermittently discharging the hot air in the stirring vessel 2, the evaporation of moisture in the stirring vessel 2 can be accelerated, and the air pressure in the stirring vessel 2 can be balanced.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for PVB resin production, characterized in that, The system includes a base frame (1), on which a stirring vessel (2) is fixedly connected. The bottom of the stirring vessel (2) is provided with a vessel door (21). The top of the stirring vessel (2) is fixedly connected to a heat insulation box (3). A box cover (31) is rotatably connected to the heat insulation box (3). Four hollow paddle frames (32) are fixedly connected to the bottom of the box cover (31). All four hollow paddle frames (32) are located inside the heat insulation box (3). A discharge valve (33) is fixedly connected to the heat insulation box (3). A stirring cylinder (4) is fixedly connected to the top of the heat insulation box (3). An installation ring frame (5) is fixedly connected to the top of the stirring cylinder (4). A feed hopper (6) is fixedly connected to the installation ring frame (5). A water chamber and an air chamber are opened inside the feed hopper (6). A top cover (61) is fixedly connected between the installation ring frame (5) and the feed hopper (6). The heat insulation box ( 3) Two water pipes (7) are fixedly connected to the feed hopper (6). The two water pipes (7) are symmetrically arranged. The insulation box (3) is connected to the water cavity in the feed hopper (6) through the two water pipes (7). A drain pipe (8) is fixedly connected to the feed hopper (6). The water cavity in the feed hopper (6) is connected to the drain pipe (8). A transfer box (9) is fixedly connected to the outer wall of the mixing vessel (2). The transfer box (9) is fixedly connected to the drain pipe (8). The transfer box (9) is connected to the drain pipe (8). A water tank (10) is fixedly connected to the outer wall of the mixing vessel (2). The transfer box (9) is fixedly connected to the water tank (10). The transfer box (9) is connected to the water tank (10). A hot stirring mechanism is provided on the mounting ring frame (5). A cooling stirring mechanism is provided inside the mixing vessel (2).

2. The waste heat recovery device for PVB resin production according to claim 1, characterized in that, The hollowed-out propeller frame (32) has a flow guide slot.

3. The waste heat recovery device for PVB resin production according to claim 1, characterized in that, The bottom of the feed hopper (6) has a discharge port.

4. The waste heat recovery device for PVB resin production according to claim 1, characterized in that, The hot stirring mechanism includes a dual-shaft motor (1101), which is fixedly connected to the mounting ring (5). A heating stirring paddle (1102) is fixedly connected to the output shaft at the bottom of the dual-shaft motor (1101). The heating stirring paddle (1102) is located inside the stirring cylinder (4). The bottom of the heating stirring paddle (1102) is fixedly connected to the box cover (31). A feeding convex ball (1103) is fixedly connected to the output shaft at the top of the dual-shaft motor (1101). The feeding convex ball (1103) is located inside the discharge port of the feed hopper (6).

5. A waste heat recovery device for PVB resin production according to claim 2, characterized in that, The cooling and stirring mechanism includes a motor frame (1201), the motor frame (1201) is fixedly connected to the outer wall of the stirring vessel (2), a servo motor (1202) is fixedly connected to the motor frame (1201), a shaft tube (1203) is rotatably connected inside the stirring vessel (2), a ring tube (12031) is rotatably connected to one end of the shaft tube (1203), the shaft tube (1203) is connected to the ring tube (12031), the ring tube (12031) is fixedly connected to the water tank (10), the ring tube (12031) is connected to the water tank (10), three hollow stirring paddles (1204) are fixedly connected to the shaft tube (1203), the shaft tube (1203) is connected to all three hollow stirring paddles (1204), a bent pipe (1205) is rotatably connected to one end of the shaft tube (1203), the shaft tube (1203) is rotatably connected to the bent pipe (1205 ... The shaft tube (1203) is connected to the bend (1205), and a wheel frame (1206) is fixedly connected to the shaft tube (1203). The wheel frame (1206) is located inside the bend (1205), and a connecting rod (1207) is rotatably connected to the wheel frame (1206). A stopper (1208) is slidably connected inside the bend (1205), and the stopper (1208) is rotatably connected to the connecting rod (1207). 08) Four one-way water inlet valves (1209) are fixedly connected to the upper part. A pipe rack (1210) is fixedly connected to the outer wall of the stirring tank (2). A water pipe (1211) is fixedly connected between the insulation box (3) and the bend (1205). The insulation box (3) and the bend (1205) are connected through the water pipe (1211). The water pipe (1211) is fixedly connected to the pipe rack (1210).

6. The waste heat recovery device for PVB resin production according to claim 3, characterized in that, It also includes a flue gas preheating mechanism, which is installed on the stirring vessel (2). The flue gas preheating mechanism includes an annular tube (1301). Two annular tubes (1301) are fixedly connected between the stirring vessel (2) and the feed hopper (6). The two annular tubes (1301) are symmetrically arranged. The gas chambers in the stirring vessel (2) and the feed hopper (6) are connected through the two annular tubes (1301). A fixing frame (1302) is fixedly connected to the lower part of the inner wall of the two annular tubes (1301). A top plug (1303) is slidably connected to the fixing frame (1302). A one-way air valve (1304) is fixedly connected to the top plug (1303). A return spring (1305) is connected between the top plug (1303) and the fixing frame (1302).

7. A waste heat recovery device for PVB resin production according to claim 3, characterized in that, Both of the top plugs (1303) are provided with guide arc surfaces.

8. A waste heat recovery device for PVB resin production according to claim 3, characterized in that, The return spring (1305) is fitted onto the top plug (1303).

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