A sludge drying device

Abstract

The invention discloses a sludge drying device, comprising an adding part, a preheating pipe, a heat collector, a flash chamber and a greenhouse connected in sequence. The sludge drying device is also provided with a heat conduction system, the heat conduction system comprising a heat conduction pipe, the preheating pipe is arranged as a double-layer pipe, the adding part is connected with the preheating pipe, the heat collector and the flash chamber are connected through a separation pipe, the greenhouse is arranged as a double-layer glass sandwich structure, the greenhouse and the flash chamber are connected through a sludge outlet pipe, the greenhouse and the adding part are connected through a heat conduction pipe, the heat conduction pipe, the sandwich between the two layers of pipes on the preheating pipe, and the sandwich structure of the greenhouse form a closed loop, and heat conduction liquid circulates in the heat conduction pipe, the preheating pipe and the greenhouse through the closed loop; the invention has a simple and practical structure, integrates the flash chamber and the greenhouse, and greatly improves the drying efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of sludge drying, and in particular to a sludge drying device. Background Art

[0002] With the development of society, the disposal of garbage needs to be solved urgently, especially sludge. Sludge contains a large number of various organic pollutants, and the organic pollutants are not easy to degrade, and the toxicity remains for a long time, which will cause environmental pollution. Pathogenic microorganisms in sludge will also affect humans through the food chain. Heavy metal pollution and sludge eutrophication have a great impact on plants and animals. These factors require sludge to be dried and processed.

[0003] Most existing sludge drying devices use single flash drying or solar greenhouse drying. The equipment structure of this structure is complex, the cost is high, the drying time is unstable, and it is greatly affected by environmental factors.

[0004] In view of the above-mentioned defects, it is necessary to provide a new type of high-efficiency, low-energy consumption and reliable sludge drying device. Summary of the invention

[0005] In order to solve the above technical defects, the technical solution adopted by the present invention is to provide a sludge drying device, including an adding part, a preheating pipe, a collector, a flash chamber and a greenhouse connected in sequence, the sludge drying device is also provided with a heat conduction system, the heat conduction system includes a heat conduction pipe, the preheating pipe is arranged as a double-layer pipe, the adding part is connected to the preheating pipe, the collector and the flash chamber are connected through a separation pipe, the greenhouse is arranged as a double-layer glass sandwich structure, the greenhouse and the flash chamber are connected through a sludge outlet pipe, the greenhouse and the adding part are connected through a heat conduction pipe, the heat conduction pipe, the interlayer between the two layers of pipes on the preheating pipe, and the interlayer structure of the greenhouse form a closed loop, and the heat conduction liquid circulates through the closed loop in the heat conduction pipe, the preheating pipe and the greenhouse.

[0006] Preferably, the adding portion is provided with a sludge adding port and a heat transfer liquid adding port, the sludge enters the inner tube of the preheating tube through the sludge adding port, and the heat transfer liquid enters the middle interlayer of the preheating tube and the heat transfer tube respectively through the heat transfer liquid adding port.

[0007] Preferably, a heat collector is provided corresponding to the preheating tube, the heat collector is configured as a solar trough collector, and the preheating tube is placed in the heat collector.

[0008] Preferably, the heat transfer system further comprises a heat transfer liquid circulator, which is disposed on the heat transfer pipe and provides power for the heat transfer liquid in the heat transfer pipe.

[0009] Preferably, a groove structure is installed in the flash chamber, and the groove structure includes a plurality of groove components, and each of the groove components is arranged in multiple layers and spaced apart; the upper end surface of the groove component is arranged in a plane shape, and a plurality of grooves are arranged at the middle position of the upper end surface of the groove component.

[0010] Preferably, each of the groove components is provided with a material opening, and the material openings on two adjacent groove components are symmetrically arranged, and each of the groove components is also provided with a groove pusher, and the groove pusher and the material opening on the same groove component are arranged on both sides of the material opening on the adjacent groove components.

[0011] Preferably, a metal stirring crawler is provided in the greenhouse, the metal stirring crawler is spaced apart up and down, the metal stirring crawler is a double-layer structure, a heating pipe is distributed in the middle layer, and the heating pipe is connected to the greenhouse layer.

[0012] Preferably, the greenhouse feed inlet on the greenhouse is also provided with a heater to heat the sludge entering the greenhouse from the greenhouse feed inlet.

[0013] Preferably, a metal crawler conveyor belt is also provided at the bottom of the greenhouse, and the metal crawler conveyor belt conveys the sludge to the discharge port of the greenhouse.

[0014] Preferably, the greenhouse is L-shaped as a whole, and a sludge agitator is provided on one side of the greenhouse discharge port.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The greatest advantage of the present invention is that it integrates the flash chamber and greenhouse into one, which greatly improves the drying efficiency; 2. It adopts a trough-type solar collector to reduce costs, is easy to install and maintain, and is energy-saving and safe; 3. Multi-layer grooves are used inside the flash chamber to improve space utilization, and the sludge in each groove forms a thin layer, which further improves the drying efficiency; 4. The flash chamber and greenhouse are used for double drying, which improves the sludge drying efficiency; 5. With the addition of an external power supply, it can continue to heat at night when there is no light, and achieve stable drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural view of the sludge drying device;

[0017] Figure 2 A setting view of the preheating tube;

[0018] Figure 3 is a structural view of the flash chamber;

[0019] Figure 4 Structural diagram of the separation device

[0020] Figure 5 is a structural view of the flash chamber groove;

[0021] Figure 6 A structural view of the greenhouse;

[0022] Figure 7 It is a structural view of the metal crawler conveyor belt.

[0023] The numbers in the figure represent:

[0024] 1-adding part; 2-preheating pipe; 3-collector; 4-separation pipeline; 5-greenhouse feed port; 6-groove assembly; 7-heat pipe; 8-heat transfer liquid circulator; 9-flash chamber; 10-sludge outlet pipe; 11-single door closed structure; 12-heater; 13-fan; 14-metal stirring crawler; 15-agitator; 16-adding port partition; 17-greenhouse discharge port; 18-groove pusher. DETAILED DESCRIPTION

[0025] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0026] like Figure 1 As shown, Figure 1 It is a structural view of the sludge drying device; the sludge drying device of the present invention is connected in sequence to an adding part 1, a preheating tube 2, a collector 3, a flash chamber 9 and a greenhouse. The sludge is added through the adding part 1 and enters the flash chamber 9 for flash evaporation after being preheated by the preheating tube 2, and then is heated in the greenhouse.

[0027] The adding part 1 is provided with a sludge adding port and a heat transfer liquid adding port. Sludge is added into the preheating tube 2 through the sludge adding port, and heat transfer liquid is added into the preheating tube 2 through the heat transfer liquid adding port. Figure 2 As shown, Figure 2 The figure is a view of the arrangement of the preheating tube 2; the preheating tube 2 is arranged as a double-layer conduit, the sludge flows through the inner tube of the preheating tube 2, and the heat transfer liquid flows in the middle layer between the inner tube and the outer tube. The adding part 1 is provided with an adding port partition 16 for separating the sludge adding port and the heat transfer liquid adding port.

[0028] The preheating tube 2 is provided with a collector 3 corresponding to the preheating tube 2, and the collector 3 is arranged side by side on one side of the flash chamber 9 and the greenhouse. The collector 3 is generally set as a solar trough collector 3, and the preheating tube 2 is placed in the trough collector 3. During the day, the sludge drying device can generate heat through light to achieve the drying operation at the position of the collector 3. The collector 3 can preliminarily dry and heat the sludge and the heat transfer liquid at the position of the preheating tube 2 at the same time.

[0029] like Figure 3 As shown, Figure 3It is a structural view of the flash chamber 9; the preheater is placed at an angle, and the outlet position of the preheating tube 2 is connected to the flash chamber 9 and the greenhouse respectively through a separation pipe 4; the separation pipe 4 includes a double-layer glass tube of an oil guide pipe and a mud guide pipe, and the oil guide pipe is arranged inside the mud guide pipe, so the outer circle of the separation pipe 4 circulates heat transfer oil and the inner circle circulates sludge; the heat transfer liquid in the middle layer between the inner tube and the outer tube of the preheating tube 2 is connected to the greenhouse through the oil guide pipe, and the sludge in the inner tube of the preheating tube 2 is connected to the feed port of the flash chamber 6 at the upper part of the flash chamber 9 through the mud guide pipe.

[0030] like Figure 4 As shown, Figure 4 This is a structural diagram of the separation device. A separation device corresponding to the separation pipeline 4 is provided at the entrance of the flash chamber. The outer circle of the double-layer glass tube is connected to the pipeline leading to the greenhouse, and the heat transfer oil directly leads to the greenhouse from the right outlet; the inner circle sludge directly flows into the separation device, and flows into the flash chamber through the four hollow cylinders under the separation device.

[0031] A groove structure is installed in the flash chamber 9. Specifically, the groove structure includes a plurality of groove components 6. The groove components 6 are arranged in multiple layers and placed horizontally.

[0032] When the sludge enters the flash chamber 9 through the feed port of the flash chamber 9 , the vacuum pump arranged in the flash chamber 9 extracts the air inside the flash chamber 9 for flash evaporation, and the sludge is flash dried on the groove assembly 6 in the flash chamber 9 .

[0033] like Figure 5 As shown, Figure 5 The structure view of the flash chamber groove; the upper end surface of the groove assembly is set to be flat, and there is a gap between the edge of each groove assembly and the inner wall of the flash chamber, and the gaps are symmetrically distributed between adjacent layers, and each groove assembly is arranged in multiple layers. The gap between the edge of the groove assembly and the inner wall of the flash chamber prevents abnormal accumulation of sludge on each groove assembly.

[0034] Preferably, a plurality of grooves are provided at the middle position of the upper end surface of the groove assembly, and the thickness of the grooves is generally set to be relatively small, so that the sludge can form a thin sludge layer in the grooves.

[0035] Each of the groove components is provided with a material opening, and the material openings on two adjacent groove components are symmetrically arranged, and the material openings can realize the circulation of sludge between the two adjacent groove components. Each of the groove components is also provided with a groove pusher 18, and the groove pusher 18 and the material opening on the same groove component are arranged on both sides of the material opening on the adjacent groove components. Preferably, the upper end surface of the groove component is arranged in a rectangular shape, and the groove pusher 18 is a movable push plate arranged on the upper end surface of the groove component; on the upper end surface of the rectangular groove component, by pushing the groove pusher 18 from one end of the upper end surface to the other end, the sludge on the upper end surface of the groove component can be pushed.

[0036] Specifically, the sludge flows in from the upper feed port and preferentially fills the uppermost groove assembly; Figure 5 When the sludge from Figure 5 After the material port on the left side flows into this layer, the groove pusher 18 on the left side, that is, the groove pusher 18 on this layer, is pushed, and the sludge moves to the right. Since the groove is lower than the upper end surface of the groove assembly, the sludge fills the groove first; after filling the groove of the groove assembly of this layer, the sludge flows into the next layer through the material port on the right side, and so on, thereby filling all the groove assemblies of the entire flash chamber layer by layer. This structure realizes flash drying of sludge in a thin layer, combines the advantages of flash drying and thin layer drying, and has excellent drying efficiency. At the same time, structurally speaking, the structure is simple in structure and easy to assemble and disassemble, which can realize rapid replacement of parts and components and improve production efficiency.

[0037] A single-door closing structure 11 is also provided at the bottom of each groove assembly 5. Specifically, a door structure is provided at the bottom of each groove. A control switch sensor is attached to the door structure. The switch cycle can be preset. The specific time is determined by experiments according to the properties of the sludge to be treated. When the sludge fills the flash chamber in the manner described, the switch remains closed before the specified flash time has passed, and the door structure is in a closed state; after the flash drying is completed, the control switch sensor opens the door structure of the groove, and the sludge on each layer of the groove assembly is pushed again through the groove pusher 18, so that the sludge falls layer by layer and is finally discharged from the flash chamber 9. The sludge that has completed this process is sent to the next link for processing, thereby improving space utilization and drying efficiency.

[0038] like Figure 6 As shown, Figure 6 It is a structural view of the greenhouse; the sludge in the flash chamber 9 is transported to the greenhouse feed port 5 of the greenhouse through the sludge outlet pipe 10; the greenhouse is configured as a double-layer glass structure, and the glass interlayer between the double-layer glass in the greenhouse is passed through the heat transfer liquid heated by the collector 3, thereby achieving thermal insulation heating of the greenhouse.

[0039] like Figure 7 As shown, Figure 7 This is a structural view of the metal stirring crawler 14. The greenhouse is provided with a metal stirring crawler 14. The metal stirring crawler 14 is spaced apart from top to bottom and is a double-layer structure. Six heating tubes are distributed in the middle interlayer. The tail ends of the heating tubes are connected to each other in a U shape and a heat transfer fluid is passed through the heating tubes. The heat transfer fluid enters and exits one side of the two heating tubes to form a cycle. The inlet and outlet of the heating tubes are connected to the glass interlayer on the greenhouse. The heat transfer fluid in the two also forms a circulation to complete the final drying. The structure of the metal stirring crawler 14 realizes the synchronization of transportation, stirring and heating of the sludge in the greenhouse. The upper and lower layers are spaced apart in distribution to increase the sludge transportation distance. Combined with the double insulation of the greenhouse and the heating effect of the heat transfer fluid, the sludge drying efficiency is greatly improved, and the space is fully utilized and saved.

[0040] Preferably, the greenhouse feed inlet 5 is also provided with a heater 12, which can further heat the sludge entering the greenhouse feed inlet 5. The greenhouse is also provided with a fan 13 for removing water vapor.

[0041] Preferably, the greenhouse is L-shaped as a whole, and a metal crawler conveyor is provided at the bottom of the greenhouse, and the metal crawler conveyor conveys the sludge after being transported and stirred by the metal stirring crawler 14 to the greenhouse discharge port 17, and a sludge stirrer 15 is also provided on one side of the greenhouse discharge port 17, and the sludge stirrer 15 stirs the sludge to be discharged again.

[0042] The heat transfer liquid addition port, the preheating pipe 2, the greenhouse and the heating pipe form a heat transfer system of the sludge drying device, and the heat transfer system realizes the heat conduction effect of the preheating pipe 2 and the greenhouse; specifically, the heat transfer system is also provided with a heat transfer pipe 7 and a heat transfer liquid circulator 8, the greenhouse and the preheating pipe 2 are connected through the separation pipe 4, the addition part 1 and the greenhouse are connected through the heat transfer pipe 7, the heat transfer liquid circulates in the heat transfer pipe 7, the interlayer between the two layers of pipes on the preheating pipe 2, the greenhouse interlayer structure and the heating pipe, the heat transfer liquid circulator 8 is arranged on the heat transfer pipe 7, the heat transfer liquid is introduced into the heat transfer system through the heat transfer liquid addition port, and the heat transfer liquid circulator 8 provides power for the heat transfer liquid in the heat transfer pipe 7, thereby realizing the circulation of the heat transfer liquid.

[0043] The flash chamber 9 and the greenhouse may be provided with a flash chamber 9 observation port and a greenhouse observation port respectively, so as to observe the drying conditions of the sludge in the flash chamber 9 and the greenhouse.

[0044] Preferably, sensors may be provided in the flash chamber 9 and the greenhouse, and the sensors detect the physical quantities of humidity and temperature inside the flash chamber 9 and the greenhouse, so as to facilitate the control of the flash chamber 9 and the greenhouse.

[0045] The sludge drying device may also be provided with an external power supply, through which the electric drying plate and the heater 12 are powered, so that heating can continue when there is no light at night, and stable drying can be achieved.

[0046] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. A sludge drying device, characterized in that: The sludge drying device comprises an adding part, a preheating pipe, a heat collector, a flash chamber and a greenhouse connected in sequence. The sludge drying device is further provided with a heat conduction system, the heat conduction system comprises a heat conduction pipe, the preheating pipe is provided as a double-layer pipe, the adding part is connected with the preheating pipe, the heat collector and the flash chamber are connected through a separation pipe, the greenhouse is provided as a double-layer glass sandwich structure, the greenhouse and the flash chamber are connected through a sludge outlet pipe, the greenhouse and the adding part are connected through a heat conduction pipe, the heat conduction pipe, the sandwich between the two layers of pipes on the preheating pipe, and the sandwich structure of the greenhouse form a closed loop, and the heat conduction liquid circulates through the closed loop in the heat conduction pipe, the preheating pipe and the greenhouse; The adding part is provided with a sludge adding port and a heat transfer liquid adding port, the sludge enters the inner tube of the preheating tube through the sludge adding port, and the heat transfer liquid enters the middle interlayer of the preheating tube and the heat transfer tube respectively through the heat transfer liquid adding port; A groove structure is installed in the flash chamber, and the groove structure includes a plurality of groove components, and each of the groove components is arranged in multiple layers at intervals; the upper end surface of the groove component is arranged in a plane shape, and a plurality of grooves are arranged at the middle position of the upper end surface of the groove component; Each of the groove components is provided with a material opening, and the material openings on two adjacent groove components are symmetrically arranged, and each of the groove components is also provided with a groove pusher, and the groove pusher and the material opening on the same groove component are arranged on both sides of the material opening on the adjacent groove component; The groove push handle is a movable push plate arranged on the upper end surface of the groove component, and a single-door closing structure is also arranged at the bottom of each groove component.

2. The sludge drying device according to claim 1, characterized in that: A heat collector is provided corresponding to the preheating tube, the heat collector is a solar trough collector, and the preheating tube is placed in the heat collector.

3. The sludge drying device according to claim 1, characterized in that: The heat transfer system further comprises a heat transfer liquid circulator, which is arranged on the heat transfer pipe and provides power for the heat transfer liquid in the heat transfer pipe.

4. The sludge drying device according to claim 1, characterized in that: A metal stirring crawler is arranged in the greenhouse, and the metal stirring crawler is arranged at intervals up and down. The metal stirring crawler is a double-layer structure, and a heating pipe is distributed in the middle layer. A heat transfer fluid flows in the heating pipe, and the heating pipe is connected to the greenhouse interlayer.

5. The sludge drying device according to claim 4, characterized in that: The greenhouse feed inlet on the greenhouse is also provided with a heater to heat the sludge entering the greenhouse from the greenhouse feed inlet.

6. The sludge drying device according to claim 4, characterized in that: A metal crawler conveyor is also provided at the bottom of the greenhouse, and the metal crawler conveyor conveys the sludge to the discharge port of the greenhouse.

7. The sludge drying device according to claim 4, characterized in that: The greenhouse is L-shaped as a whole, and a sludge agitator is arranged on one side of the greenhouse discharge port.

Images