CN111039539A

CN111039539A - Sludge drying device

Info

Publication number: CN111039539A
Application number: CN201911426150.8A
Authority: CN
Inventors: 丁世磊; 徐六一; 付联燕; 胡贤龙; 曹光东; 白丁旺; 许睿圣; 李海金
Original assignee: Anhui University of Technology AHUT
Current assignee: Anhui University of Technology AHUT
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-21

Abstract

The invention discloses a sludge drying device, which comprises an adding part, a preheating pipe, a heat collector, a flash evaporation chamber and a greenhouse which are sequentially connected, wherein the sludge drying device is also provided with a heat conduction system, the heat conduction system comprises a heat conduction pipe, the preheating pipe is arranged into a double-layer conduit, the adding part is connected with the preheating pipe, the heat collector is connected with the flash evaporation chamber through a separation pipeline, the greenhouse is arranged into a double-layer glass sandwich structure, the greenhouse is connected with the flash evaporation chamber through a sludge delivery pipe, the greenhouse is connected with the adding part through a heat conduction pipe, the heat conduction pipe, a sandwich layer between two layers of pipes on the preheating pipe and the sandwich layer structure of the greenhouse form a closed loop, and heat conduction liquid circularly circulates in the heat conduction pipe, the preheating pipe and the greenhouse through the closed loop; the invention has simple and practical structure, integrates the flash chamber and the greenhouse into a whole, and greatly improves the drying efficiency.

Description

Sludge drying device

Technical Field

The invention relates to the technical field of sludge drying, in particular to a sludge drying device.

Background

Along with social development, the treatment of garbage needs to be solved urgently, particularly, sludge contains a large amount of various organic pollutants, the organic pollutants are not easy to degrade, the toxic residual time is long, environmental pollution is caused, pathogenic microorganisms in the sludge can also influence human beings through a food chain, heavy metal pollution and sludge eutrophication have great influence on plant animals, and the factors all enable the sludge to be treated after being dried.

Most of the existing sludge drying devices adopt single flash drying or solar greenhouse drying, the equipment structure of the structure is complex, the required cost is high, the drying time is unstable, and the influence of environmental factors is large.

In view of the above-mentioned drawbacks, there is a need to provide a new sludge drying apparatus with high efficiency, low energy consumption and reliability.

Disclosure of Invention

In order to solve the technical defects, the invention adopts the technical scheme that the sludge drying device comprises an adding part, a preheating pipe, a heat collector, a flash evaporation chamber and a greenhouse which are sequentially connected, the sludge drying device is also provided with a heat conduction system, the heat conduction system comprises a heat conduction pipe, the preheating pipe is arranged into a double-layer conduit, the adding part is connected with the preheating pipe, the heat collector is connected with the flash chamber through a separation pipeline, the greenhouse is arranged into a double-layer glass sandwich structure, the greenhouse and the flash chamber are connected through a sludge delivery pipe, the greenhouse is connected with the adding part through a heat conduction pipe, the heat conduction pipe, an interlayer between two layers of pipes on the preheating pipe and an interlayer 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.

Preferably, the adding part is provided with a sludge adding port and a heat conducting liquid adding port, sludge enters the inner pipe of the preheating pipe through the sludge adding port, and heat conducting liquid enters the intermediate interlayer of the preheating pipe and the heat conducting pipe through the heat conducting liquid adding port respectively.

Preferably, the preheating pipe is correspondingly provided with a heat collector, the heat collector is a solar trough type heat collector, and the preheating pipe is arranged in the heat collector.

Preferably, the heat conducting system further comprises a heat conducting liquid circulator, the heat conducting liquid circulator is arranged on the heat conducting pipe, and the heat conducting liquid circulator provides power for the heat conducting liquid in the heat conducting pipe.

Preferably, a groove structure is arranged in the flash chamber, the groove structure comprises a plurality of groove components, and the groove components are arranged at intervals in a multilayer manner; the upper end face of the groove component is planar, and a plurality of grooves are formed in the middle of the upper end face of the groove component.

Preferably, each groove component is provided with a material port, the material ports on two adjacent groove components are symmetrically arranged, each groove component is further provided with a groove pushing handle, and the groove pushing handle and the material port on the same groove component are arranged on two sides of the material port on the adjacent groove component.

Preferably, a metal stirring crawler belt is arranged in the greenhouse, the metal stirring crawler belt is arranged at an upper interval and a lower interval, the metal stirring crawler belt is of a double-layer structure, heating pipes are distributed on a middle interlayer, and the heating pipes are communicated with the greenhouse interlayer.

Preferably, a heater is further arranged at the greenhouse feeding port on the greenhouse to heat the sludge entering the greenhouse from the greenhouse feeding port.

Preferably, the bottom of the greenhouse is further provided with a metal crawler belt, and the metal crawler belt conveys sludge to the greenhouse discharge port.

Preferably, the greenhouse is L-shaped as a whole, and a sludge stirrer is arranged on one side of a discharge port of the greenhouse.

Compared with the prior art, the invention has the beneficial effects that: 1, the invention has the greatest advantages of integrating a flash chamber and a greenhouse, and greatly improving the drying efficiency; 2, the groove type solar heat collector is adopted, so that the cost is reduced, the installation and the maintenance are easy, and the energy is saved and the safety is realized; 3, the flash evaporation chamber is internally provided with a plurality of layers of grooves, so that the space utilization rate is improved, and sludge in each groove forms a thin layer, so that the drying efficiency is further improved; 4, double drying is carried out in a flash chamber and a heating chamber, so that the sludge drying efficiency is improved; and 5, an external power supply is added, so that the heating can be continuously carried out at night without illumination, and the drying is stable.

Drawings

FIG. 1 is a structural view of the sludge drying apparatus;

FIG. 2 is a view showing the arrangement of the preheating tube;

FIG. 3 is a structural view of the flash chamber;

FIG. 4 is a view showing the structure of the separation apparatus

FIG. 5 is a structural view of the flash chamber groove;

FIG. 6 is a structural view of the greenhouse;

fig. 7 is a structural view of the metal track belt.

The figures in the drawings represent:

1-an addition section; 2-preheating pipe; 3, a heat collector; 4-a separation conduit; 5-feeding hole of greenhouse; 6-a groove component; 7-a heat conducting pipe; 8-a heat transfer liquid circulator; 9-a flash chamber; 10-a sludge delivery pipe; 11-single door closed configuration; 12-a heater; 13-a fan; 14-a metal stirring caterpillar; 15-a stirrer; 16-addition port partition plate; 17-greenhouse discharge port; 18-groove pusher.

Detailed Description

The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.

As shown in fig. 1, fig. 1 is a structural view of the sludge drying apparatus; the sludge drying device comprises an adding part 1, a preheating pipe 2, a heat collector 3, a flash chamber 9 and a greenhouse which are sequentially connected, wherein sludge is added through the adding part 1 and enters the flash chamber 9 for flash evaporation through preheating treatment of the preheating pipe 2, and then heating treatment is carried out in the greenhouse.

The adding part 1 is provided with a sludge adding port and a heat conducting liquid adding port. The sludge is added into the preheating pipe 2 through the sludge adding port, and the heat-conducting liquid is added into the preheating pipe 2 through the heat-conducting liquid adding port. As shown in fig. 2, fig. 2 is a view showing the arrangement of the preheating tube 2; the preheating pipe 2 is a double-layer guide pipe, sludge flows through the inner pipe of the preheating pipe 2, and heat-conducting liquid flows through the interlayer between the inner pipe and the outer pipe. An adding port partition plate 16 is arranged in the adding part 1 and used for separating the sludge adding port and the heat-conducting liquid adding port.

The preheating pipes 2 are correspondingly provided with heat collectors 3, and the heat collectors 3 are arranged on one sides of the flash evaporation chambers 9 and the greenhouse side by side. The heat collector 3 is generally arranged as a solar trough heat collector 3, the preheating pipe 2 is arranged in the trough heat collector 3, and the drying operation of the sludge drying device at the position of the heat collector 3 can be realized by illumination and heat production in the daytime. The heat collector 3 can simultaneously carry out primary drying and heating on the sludge and the heat conducting liquid at the position of the preheating pipe 2.

As shown in fig. 3, fig. 3 is a structural view of the flash chamber 9; the preheater is obliquely arranged, and the outlet position of the preheating pipe 2 is respectively connected with the flash evaporation chamber 9 and the greenhouse through a separation pipeline 4; the separation pipeline 4 comprises an oil guide pipe and a double-layer glass pipe of a mud guide pipe, wherein the oil guide pipe is arranged in the mud guide pipe, so that heat conduction oil flows through the outer ring of the separation pipeline 4, and sludge flows through the inner ring; the heat-conducting liquid in the interlayer between the inner pipe and the outer pipe of the preheating pipe 2 is communicated with the greenhouse through the oil guide pipe, and the sludge in the inner pipe of the preheating pipe 2 is communicated with a feed inlet of the flash chamber 6 at the upper part of the flash chamber 9 through the sludge guide pipe.

As shown in fig. 4, fig. 4 is a structure diagram of a separation device, a separation device is arranged at an inlet of the flash chamber corresponding to the separation pipeline 4, an outer ring of a double-layer glass tube is connected with a pipeline leading to a greenhouse, and heat conduction oil directly leads to the greenhouse from an outlet at the right side; the sludge in the inner ring directly flows into the separation device and flows into the flash evaporation chamber through four hollow cylinders below the separation device.

A groove structure is arranged in the flash chamber 9, specifically, the groove structure comprises a plurality of groove components 6, and the groove components 6 are arranged in a multilayer mode at intervals and are horizontally placed.

When sludge enters the flash chamber 9 through the feed inlet of the flash chamber 9, a vacuum pump arranged in the flash chamber 9 pumps air out of the flash chamber 9 for flash evaporation, and the sludge is subjected to flash evaporation drying on the groove component 6 in the flash chamber 9.

As shown in fig. 5, fig. 5 is a structural view of the flash chamber groove; the upper end surface of each groove component is arranged in a plane shape, gaps are reserved between the edge parts of the groove components and the inner wall surface of the flash chamber, the gaps are symmetrically distributed between adjacent layers, and the groove components are arranged at intervals in multiple layers. The gap between the edge part of the groove component and the inner wall surface of the flash chamber avoids abnormal accumulation of sludge on each groove component.

Preferably, a plurality of grooves are formed in the middle of the upper end face of the groove assembly, and the grooves are generally arranged to be small in thickness, so that sludge can form a sludge thin layer in the grooves.

And each groove component is provided with a material port, the material ports on two adjacent groove components are symmetrically arranged, and the circulation of sludge between the two adjacent groove components can be realized through the material ports. Each groove component is also provided with a groove pushing handle 18, and the groove pushing handle 18 and the material port on the same groove component are arranged on two sides of the material port on the adjacent groove component. Preferably, the upper end surface of the groove component is rectangular, and the groove pushing handle 18 is a movable pushing plate arranged on the upper end surface of the groove component; on the rectangular upper end surface of the groove component, the groove pushing handle 18 is pushed from one end of the upper end surface to the other end, so that the pushing of the sludge on the upper end surface of the groove component can be realized.

Specifically, sludge flows in from the feed inlet at the upper part and preferentially fills the groove assembly at the uppermost layer; referring to fig. 5, after the sludge flows into the layer from the material opening on the left side in fig. 5, the groove pushing handle 18 on the left side is pushed, that is, the groove pushing handle 18 on the layer, so that the sludge moves to the right side, and the groove is preferentially filled with the sludge because the position of the groove is lower than the position of the upper end surface of the groove component; after the grooves of the groove component on the layer are filled, sludge flows into the next layer through the material port on the right side, and the steps are repeated, so that all the groove components of the whole flash evaporation chamber are filled layer by layer. The structure realizes flash drying of the sludge in a lamellar manner, combines the advantages of flash drying and lamellar drying, and has excellent drying efficiency. Meanwhile, structurally, the structure is simple, the assembly and disassembly are easy, the parts can be quickly replaced, and the production efficiency is improved.

The bottom of each groove component 5 is also provided with a single-door type closing structure 11, specifically, the bottom of each groove is provided with a door structure, a control switch sensor is attached to the door structure, the switch period can be preset, and the specific time is determined by experiments according to the property of the treated sludge. When the flash chamber is filled with the sludge in the manner, the switch is kept closed and the door structure is in a closed state before the specified flash time; after the flash evaporation drying is finished, the control switch sensor drives the door structure of the groove, and the groove pushing hands 18 push the sludge on each layer of the groove assembly again, so that the sludge falls layer by layer and is finally discharged from the flash evaporation chamber 9, the sludge after the process is conveyed to the next link for treatment, and the space utilization rate and the drying efficiency are improved.

As shown in FIG. 6, FIG. 6 is a structural view of the greenhouse; the sludge in the flash chamber 9 is transported to a greenhouse feed inlet 5 of the greenhouse through a sludge delivery pipe 10; the greenhouse is of a double-layer glass structure, and heat conducting liquid heated by the heat collector 3 is communicated with a glass interlayer between the double layers of glass on the greenhouse, so that the greenhouse is heated in a heat preservation manner.

As shown in fig. 7, fig. 7 is a structural view of the metal stirring crawler 14, the metal stirring crawler 14 is arranged in the greenhouse, the metal stirring crawler 14 is arranged at an interval from top to bottom, the metal stirring crawler 14 is of a double-layer structure, six heating pipes are distributed in an interlayer, the tail ends of the heating pipes are communicated in pairs to form a U shape, heat conducting liquid is introduced into the heating pipes, the heat conducting liquid respectively enters and exits from one side of each of the two heating pipes to form a cycle, the inlet and the outlet of each of the heating pipes are communicated with the interlayer of the glass on the greenhouse, the heat conducting liquid in the two heating pipes also forms a cycle, and the. The structure of the metal stirring crawler 14 realizes the transportation, stirring and heating synchronization of sludge in the greenhouse, the upper layer and the lower layer are arranged at intervals in distribution, the sludge transportation distance is increased, the double heat preservation and the heating effect of the heat conducting liquid of the greenhouse are combined, the sludge drying efficiency is greatly improved, and the space is fully utilized and saved.

Preferably, the greenhouse feeding port 5 is further provided with a heater 12 for further heating the sludge entering at the greenhouse feeding port 5. The greenhouse is also provided with a fan 13 for removing water vapor.

Preferably, the whole greenhouse is L-shaped, the bottom of the greenhouse is further provided with a metal crawler belt, the metal crawler belt conveys the sludge conveyed and stirred by the metal stirring crawler 14 to the greenhouse discharge port 17, one side of the greenhouse discharge port 17 is further provided with a sludge stirrer 15, and the sludge stirrer 15 stirs the sludge to be discharged again. A

The heat-conducting liquid adding port, the preheating pipe 2, the greenhouse and the heating pipe form a heat-conducting system of the sludge drying device, and the heat-conducting system realizes the heat-conducting effect of the preheating pipe 2 and the greenhouse; specifically, the heat conduction system is further provided with a heat conduction pipe 7 and a heat conduction liquid circulator 8, the greenhouse is connected with the preheating pipe 2 through the separation pipeline 4, the adding part 1 is connected with the greenhouse through the heat conduction pipe 7, heat conduction liquid circulates in the heat conduction pipe 7, an interlayer between two layers of pipes on the preheating pipe 2, the greenhouse interlayer structure and the heating pipe, the heat conduction liquid circulator 8 is arranged on the heat conduction pipe 7, the heat conduction liquid is led into the heat conduction system through the heat conduction liquid adding port, and the heat conduction liquid circulator 8 provides power for the heat conduction liquid in the heat conduction pipe 7, so that the heat conduction liquid can flow circularly.

The flash evaporation chamber 9 and the greenhouse can be respectively provided with a flash evaporation chamber 9 observation port and a greenhouse observation port so as to observe the drying condition of the sludge in the flash evaporation chamber 9 and the greenhouse.

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

The sludge drying device can also be provided with an external power supply, and the electric drying plate and the heater 12 are powered by the external power supply, so that the sludge drying device can be continuously heated at night without illumination, and the sludge drying device can be stably dried.

The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a sludge drying device, its characterized in that, is including the interpolation portion, preheater tube, heat collector, flash chamber and the greenhouse that connect gradually, sludge drying device still is provided with heat conduction system, heat conduction system includes the heat pipe, the preheater tube sets up to double-deck pipe, add the portion with the preheater tube is connected, the heat collector with the flash chamber passes through the separation pipeline and connects, the greenhouse sets up to double glazing sandwich structure, the greenhouse with the flash chamber passes through the mud delivery pipe and connects, the greenhouse with the interpolation portion passes through the heat pipe and connects, the heat pipe, the interlayer between the last two-layer pipe of preheater tube, the sandwich structure of greenhouse forms closed loop, and the heat conduction liquid is in the heat pipe the preheater tube, the greenhouse passes through closed loop circulation.

2. The sludge drying apparatus as claimed in claim 1, wherein the adding portion is provided with a sludge adding port through which sludge enters the inner pipe of the preheating pipe and a heat transfer liquid adding port through which heat transfer liquid enters the intermediate layer of the preheating pipe and the heat transfer pipe, respectively.

3. The sludge drying device as claimed in claim 2, wherein the preheating pipe is correspondingly provided with a heat collector, the heat collector is a solar trough heat collector, and the preheating pipe is arranged in the heat collector.

4. The sludge drying apparatus of claim 1, wherein the heat transfer system further comprises a heat transfer fluid circulator disposed on the heat transfer tube, the heat transfer fluid circulator powering the heat transfer fluid within the heat transfer tube.

5. The sludge drying apparatus of claim 1, wherein a groove structure is installed in the flash chamber, the groove structure comprises a plurality of groove assemblies, and the groove assemblies are arranged in a multi-layer spaced manner; the upper end face of the groove component is planar, and a plurality of grooves are formed in the middle of the upper end face of the groove component.

6. The sludge drying apparatus as claimed in claim 5, wherein each of said groove assemblies has a material opening, and said material openings of two adjacent groove assemblies are symmetrically disposed, and each of said groove assemblies further has a groove pushing handle, and said groove pushing handle and said material opening of the same groove assembly are disposed at two sides of said material opening of the adjacent groove assembly.

7. The sludge drying device as claimed in claim 1, wherein the greenhouse is provided with metal stirring caterpillar tracks which are arranged at intervals up and down, the metal stirring caterpillar tracks are of a double-layer structure, heating pipes are distributed in the middle interlayer, heat-conducting liquid flows in the heating pipes, and the heating pipes are communicated with the interlayer of the greenhouse.

8. The sludge drying apparatus as claimed in claim 7, wherein the greenhouse inlet port of the greenhouse is further provided with a heater for heating the sludge introduced into the greenhouse from the greenhouse inlet port.

9. The sludge drying apparatus as claimed in claim 7, wherein a metal crawler belt is further provided at the bottom of the greenhouse, and the metal crawler belt conveys the sludge to the discharge port of the greenhouse.

10. The sludge drying apparatus as claimed in claim 7, wherein the greenhouse is L-shaped as a whole, and a sludge stirrer is provided at a side of the discharge port of the greenhouse.