Sludge drying machine with heat energy recovery function

Abstract

The utility model discloses a sludge drying machine with a heat energy recovery function, which comprises a drying mechanism, and a waste heat recovery mechanism is arranged on one side of the drying mechanism; the waste heat recovery mechanism comprises a first flow dividing pipe, the upper portion of the surface of the first flow dividing pipe communicates with a recovery tank, a first partition plate and a second partition plate are fixed to the inner wall of the recovery tank, an outer heating cavity is formed by the surface of the first partition plate and the inner wall of the recovery tank, and a heat absorption cavity is formed in the interlayer position of the first partition plate and the second partition plate. A heat distribution tank is fixed to the surface of the recovery tank, the bottom of the heat absorption cavity communicates with a conveying pump through a pipeline, the surface of the conveying pump communicates with a backflow pipe, the surface of a first flow distribution pipe communicates with a second flow distribution pipe, and the surface of the second flow distribution pipe communicates with a heat conduction pipe. The sludge drying machine has the advantage of being capable of recycling waste heat of steam used during sludge drying, and the problem that an existing sludge drying machine is difficult to recycle the used waste heat of the steam is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge drying, in particular to a sludge drying machine with a heat energy recovery function. Background Art

[0002] A sludge dryer is a mechanical device used to reduce the volume and weight of wet sludge and stabilize it for subsequent processing or disposal. Typically, a steam sludge dryer uses steam as a heat source to heat and evaporate the water in the sludge.

[0003] A large amount of steam is required when drying sludge, and the steam will be discharged directly after drying. This will result in the waste heat in the steam being unable to be effectively utilized, causing heat energy waste and not being environmentally friendly. Utility Model Content

[0004] The utility model aims to provide a sludge dryer with heat recovery function, which has the advantage of being able to recover the waste heat of steam used in sludge drying, and solves the problem that it is difficult for the current sludge dryer to recover the waste heat of steam used.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sludge dryer with heat recovery function, comprising a drying mechanism, a waste heat recovery mechanism being arranged on one side of the drying mechanism;

[0006] The waste heat recovery mechanism includes a first diverter pipe, a recovery tank is connected above the surface of the first diverter pipe, a first partition and a second partition are fixed to the inner wall of the recovery tank, the surface of the first partition and the inner wall of the recovery tank form an external heating chamber, and a heat absorption chamber is formed at the interlayer of the first partition and the second partition, a heat diverter tank is fixed on the surface of the recovery tank, a delivery pump is connected to the bottom of the heat absorption chamber through a pipeline, a reflux pipe is connected to the surface of the delivery pump, the surface of the first diverter pipe is connected to the second diverter pipe, the surface of the second diverter pipe is connected to a heat conduction pipe, and the bottom of the heat absorption chamber is connected to a drain valve.

[0007] As a preferred sludge dryer with heat recovery function of the utility model, the drying mechanism includes a drying tank, a motor is fixed on the top of the drying tank, the motor output shaft passes through the interior of the drying tank and is fixed with a stirring rod, a heat-conducting jacket is fixed on the surface of the drying tank, an air filling pipe is provided at the bottom of the heat-conducting jacket, and the top of the heat-conducting jacket is connected to the first diversion pipe.

[0008] As a preferred embodiment of the sludge dryer with heat recovery function of the utility model, a plurality of heat-conducting fins are fixed on the surface of the heat absorption chamber and the second partition plate.

[0009] As a preferred embodiment of the sludge dryer with heat recovery function of the utility model, the heat conducting pipe is arranged in a spiral structure, and the heat conducting pipe is in contact with the surface of the reflux pipe.

[0010] As a preferred embodiment of the sludge dryer with heat recovery function of the utility model, the bottom of the heat-conducting jacket and the bottom of the first diversion pipe are both connected to a drain valve.

[0011] As a preferred embodiment of the sludge dryer with heat recovery function of the utility model, the inner walls of the recovery tank and the heat separation tank are both fixed with heat insulation plates.

[0012] As a preferred sludge dryer with heat recovery function of the utility model, a controller is fixed on the surface of the recovery tank.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model can recover the excess steam remaining during sludge drying by setting a waste heat recovery mechanism. During the sludge drying process by the drying mechanism, the excess steam can enter the first shunt pipe, and the first shunt pipe can guide the steam to the outer heating chamber and the inner side of the second partition. At this time, water can be injected into the heat absorption chamber, and the steam flows in the outer heating chamber and the second partition, forming a double heat exchange with the water in the heat absorption chamber, so that the water in the heat absorption chamber can be heated by both inside and outside, thereby improving the heat transfer efficiency, avoiding direct contact of the steam with the water to be preheated, and preventing contamination between the water and the steam. At the same time, the delivery pump can pump the water at the bottom of the heat absorption chamber Out, and re-transported to the top of the heat absorption chamber, so that the water flow generates flow, and the water circulates in the heat absorption chamber to form forced convection. Compared with natural convection, it can more effectively take away the steam heat and improve the heat exchange efficiency. At the same time, part of the steam from the first diverter pipe can also be introduced into the heat distribution tank and the heat conduction pipe through the second diverter pipe. The heat conduction pipe can directly transfer the surface heat to the return pipe by fitting the return pipe, and the steam inside the heat distribution tank can further heat the return pipe, thereby further improving the heating effect of the water flow inside the return pipe, so that the steam thermal energy can be fully utilized. After the steam recovery is completed, the drain valve can be opened to discharge the hot water inside the heat absorption chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the drying mechanism in the utility model;

[0018] Figure 4It is a cross-sectional structural diagram of the waste heat recovery mechanism in the utility model;

[0019] Figure 5 It is a partial cross-sectional structural schematic diagram of the waste heat recovery mechanism in the utility model.

[0020] In the figure: 1. Drying mechanism; 101. Drying tank; 102. Motor; 103. Stirring rod; 104. Heat-conducting jacket; 2. Waste heat recovery mechanism; 201. First shunt pipe; 202. Recovery tank; 203. First partition; 204. Second partition; 205. External heating chamber; 206. Heat absorption chamber; 207. Heat distribution tank; 208. Delivery pump; 209. Reflux pipe; 210. Second shunt pipe; 211. Heat-conducting pipe; 212. Drain valve; 213. Heat-conducting fins; 214. Heat insulation board; 215. Steam trap; 3. Controller. DETAILED DESCRIPTION

[0021] See also Figure 1-5 , a sludge dryer with heat recovery function, comprising a drying mechanism 1, a waste heat recovery mechanism 2 is arranged on one side of the drying mechanism 1;

[0022] The drying mechanism 1 is used to dry the sludge, and the waste heat recovery mechanism 2 recovers the heat of the excess steam remaining during the sludge drying.

[0023] The waste heat recovery mechanism 2 includes a first shunt pipe 201, the surface of the first shunt pipe 201 is connected with a recovery tank 202, the inner wall of the recovery tank 202 is fixed with a first baffle 203 and a second baffle 204, the surface of the first baffle 203 and the inner wall of the recovery tank 202 form an external heating chamber 205, the first baffle 203 and the second baffle 204 sandwich form a heat absorption chamber 206, the top of the first shunt pipe 201 is connected with the bottom of the inner wall of the external heating chamber 205 and the bottom of the inner side of the second baffle 204, the surface of the recovery tank 202 is fixed with a heat distribution tank 207, and the bottom of the heat absorption chamber 206 is connected with a heat transfer tank 207 through a pipeline. The delivery pump 208 is fixed to the bottom of the recovery tank 202. The surface of the delivery pump 208 is connected with a reflux pipe 209. The top of the reflux pipe 209 is connected with the top of the heat absorption chamber 206. The surface of the reflux pipe 209 is located inside the heat distribution tank 207. The surface of the first shunt pipe 201 is connected with the second shunt pipe 210. The surface of the second shunt pipe 210 is connected with a heat conduction pipe 211. The heat conduction pipe 211 is located inside the heat distribution tank 207. The top of the second shunt pipe 210 is connected with the bottom of the heat distribution tank 207. The bottom of the heat absorption chamber 206 is connected with a drain valve 212. The top of the heat absorption chamber 206 is provided with a water inlet.

[0024] During the sludge drying process of the drying mechanism 1, the excess steam can enter the first shunt pipe 201, and the first shunt pipe 201 can guide the steam into the inner side of the external heating chamber 205 and the second partition 204. At this time, water can be injected into the heat absorption chamber 206, and the steam flows in the external heating chamber 205 and the second partition 204, forming a double heat exchange with the water in the heat absorption chamber 206, so that the water in the heat absorption chamber 206 can be heated by both inside and outside, thereby improving the heat transfer efficiency, avoiding direct contact of steam with the water to be preheated, and preventing contamination between water and steam. At the same time, the delivery pump 208 can extract the water at the bottom of the heat absorption chamber 206 and re-deliver it to the top of the heat absorption chamber 206, so that the water flow can flow. , so that water circulates in the heat absorption chamber 206 to form forced convection. Compared with natural convection, it can more effectively take away the steam heat and improve the heat exchange efficiency. At the same time, part of the steam from the first shunt pipe 201 can also be introduced into the heat distribution tank 207 and the heat conducting pipe 211 through the second shunt pipe 210. The heat conducting pipe 211 can directly transfer the surface heat to the return pipe 209 by fitting the return pipe 209, and the steam inside the heat distribution tank 207 can also further heat the return pipe 209, thereby further improving the heating effect of the water flow inside the return pipe 209, so that the steam thermal energy can be fully utilized. After the steam recovery is completed, the drain valve 212 can be opened to discharge the hot water inside the heat absorption chamber 206.

[0025] Further, the drying mechanism 1 includes a drying tank 101, a motor 102 is fixed on the top of the drying tank 101, the output shaft of the motor 102 penetrates into the interior of the drying tank 101 and is fixed with a stirring rod 103, a heat-conducting jacket 104 is fixed on the surface of the drying tank 101, a gas-filling pipe is provided at the bottom of the heat-conducting jacket 104, the top of the heat-conducting jacket 104 is connected with the first shunt pipe 201, a feeding port is provided at the top of the drying tank 101, and a solenoid valve is connected at the bottom of the drying tank 101;

[0026] The sludge is added to the drying tank 101 through the feeding port. When the motor 102 is started, the stirring rod 103 will stir the sludge. At the same time, steam can be injected into the heat-conducting jacket 104 through the gas pipe. The steam flows in the heat-conducting jacket 104 and releases heat. The heat is transferred to the sludge in the tank through the wall of the drying tank 101, thereby achieving indirect heating of the sludge, so that the sludge can be dried. The dried sludge can be discharged through the solenoid valve, and the excess steam in the heat-conducting jacket 104 can be introduced into the first diversion pipe 201.

[0027] Furthermore, a plurality of heat conducting fins 213 are fixed on the surface of the heat absorption chamber 206 and the second partition plate 204;

[0028] The heat-conducting fins 213 can increase the heat exchange area, improve the heat exchange efficiency, and enhance the effects of heat conduction and convection heat exchange, so that the water flow inside the heat absorption chamber 206 can be heated faster.

[0029] Furthermore, the heat conducting pipe 211 is arranged in a spiral structure, and the heat conducting pipe 211 is in contact with the surface of the return pipe 209;

[0030] The spiral structure of the heat conducting pipe 211 can prolong the time that the steam stays inside the heat conducting pipe 211, thereby making the heat absorbing efficiency of the heat conducting pipe 211 better and making the heating effect of the return pipe 209 better.

[0031] Furthermore, the bottom of the heat-conducting jacket 104 and the bottom of the first diverter pipe 201 are both connected to a steam trap 215;

[0032] The provision of the steam trap 215 ensures that the condensate generated inside the heat-conducting jacket 104 and the first diverter pipe 201 can be discharged normally, and prevents the steam from being discharged through the steam trap 215 .

[0033] Furthermore, the inner walls of the recovery tank 202 and the heat separation tank 207 are both fixed with heat insulation plates 214;

[0034] The heat insulation board 214 can provide heat insulation for the recovery tank 202 and the heat separation tank 207, thereby reducing the heat loss on the surfaces of the recovery tank 202 and the heat separation tank 207, making it difficult for the recovery tank 202 and the heat separation tank 207 to cool naturally.

[0035] Furthermore, a controller 3 is fixed on the surface of the recovery tank 202, and the controller 3 is electrically connected to the motor 102, the solenoid valve at the bottom of the drying tank 101 and the delivery pump 208;

[0036] The controller 3 can operate the motor 102 , the solenoid valve and the delivery pump 208 .

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge dryer with heat recovery function, comprising a drying mechanism (1), characterized in that: A waste heat recovery mechanism (2) is provided on one side of the drying mechanism (1); The waste heat recovery mechanism (2) comprises a first shunt pipe (201), the surface of the first shunt pipe (201) is connected to a recovery tank (202), the inner wall of the recovery tank (202) is fixed with a first partition plate (203) and a second partition plate (204), the surface of the first partition plate (203) and the inner wall of the recovery tank (202) form an external heating chamber (205), and the first partition plate (203) and the second partition plate (204) form a heat absorption chamber (206) at the sandwich. ), a heat distribution tank (207) is fixed on the surface of the recovery tank (202), a delivery pump (208) is connected to the bottom of the heat absorption chamber (206) through a pipeline, a return pipe (209) is connected to the surface of the delivery pump (208), a second branch pipe (210) is connected to the surface of the first branch pipe (201), a heat conduction pipe (211) is connected to the surface of the second branch pipe (210), and a drain valve (212) is connected to the bottom of the heat absorption chamber (206).

2. The sludge dryer with heat recovery function according to claim 1, characterized in that: The drying mechanism (1) comprises a drying tank (101), a motor (102) is fixed on the top of the drying tank (101), an output shaft of the motor (102) penetrates into the interior of the drying tank (101) and is fixed with a stirring rod (103), a heat-conducting jacket (104) is fixed on the surface of the drying tank (101), a gas-filling pipe is provided at the bottom of the heat-conducting jacket (104), and the top of the heat-conducting jacket (104) is connected to a first shunt pipe (201).

3. The sludge dryer with heat recovery function according to claim 1, characterized in that: A plurality of heat-conducting fins (213) are fixed on the surfaces of the heat-absorbing cavity (206) and the second partition plate (204).

4. The sludge dryer with heat recovery function according to claim 1, characterized in that: The heat conducting pipe (211) is arranged in a spiral structure, and the heat conducting pipe (211) is in contact with the surface of the return pipe (209).

5. The sludge dryer with heat recovery function according to claim 2, characterized in that: The bottom of the heat-conducting jacket (104) and the bottom of the first diversion pipe (201) are both connected to a drain valve (215).

6. The sludge dryer with heat recovery function according to claim 1, characterized in that: Heat insulation boards (214) are fixed to the inner walls of the recovery tank (202) and the heat separation tank (207).

7. The sludge dryer with heat recovery function according to claim 1, characterized in that: A controller (3) is fixed on the surface of the recovery tank (202).

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