CN206345771U - A kind of sludge hydrofuge anhydration system - Google Patents

Abstract

The utility model provides a sludge dehumidification and drying system, which comprises a drying box body, the drying box body is provided with a feed port, the bottom of the drying box body is provided with a material outlet port, and one side of the drying box body is provided with a transport sludge The mesh belt is equipped with a heat pump condenser on the other side. The mesh belt and the heat pump condenser are separated by a partition, and the bottom of the partition is provided with a vent, the drying box is equipped with a circulating fan, and the top of the drying box is provided with an air supply port Connect the heating circulation mechanism with the moisture discharge port, the supplementary air port and the moisture discharge port. The sludge dehumidification and drying system adopts low-temperature drying to reduce the content of volatile substances in the tail gas and reduce the treatment cost. The entire drying process is carried out in a closed environment, and no odor is discharged into the external environment, which meets environmental protection requirements; Type drying equipment, and electric energy as the only energy source, is suitable for various types of sludge drying systems and has a wide range of applications; the use of secondary heat recovery technology improves the heat utilization efficiency of the drying system.

Description

A sludge dehumidification and drying system

technical field

The utility model belongs to the technical field of sludge drying treatment, in particular to a sludge dehumidification and drying system.

Background technique

Existing sludge drying systems are mainly based on rotary disc drying process, paddle drying process, belt drying, fluidized bed drying process, etc.; however, these drying systems mostly use saturated steam, heat conduction Oil and the like are used as heat sources, which have the disadvantages of high energy consumption, limited heat sources, and secondary pollution. The heat pump dehumidification drying device has the advantages of low energy consumption, less pollutant discharge, and is not limited by heat sources; the belt dryer has a simple structure, less maintenance parts, strong adaptability to different sludge, low drying process temperature, and safety. Therefore, it is necessary to design a sludge drying system that effectively combines heat pump energy-saving technology with belt drying equipment to expand the application range of new energy drying equipment.

Utility model content

The purpose of this utility model is to overcome the above-mentioned problems in the existing sludge drying system, provide a sludge dehumidification and drying system that effectively combines heat pump energy-saving technology and belt drying equipment, and expand the application range of new energy drying equipment.

The technical solution of the utility model is to provide a sludge dehumidification and drying system, including a drying box, the drying box is provided with a feed port, the bottom of the drying box is provided with a discharge port, and the drying box One side of the body is equipped with a mesh belt for transporting sludge. One end of the mesh belt is located directly below the feed port, and the discharge port is located directly below the end of the mesh belt. The other side of the drying box is equipped with a heat pump condenser. The mesh belt and The heat pump condenser is separated by a partition, and the bottom of the partition is provided with a vent, the drying box is provided with a circulating fan, and the top of the drying box is provided with an air supply port and a moisture discharge port, and the air supply port and the moisture discharge port The port is connected to the heating cycle mechanism.

Further, the above-mentioned drying box is divided into multiple sections, and two adjacent sections are separated by a windshield, and each section is respectively provided with a heat pump condenser and a circulating fan.

Further, the above-mentioned feeding port is provided with a feeding buffer bin and a extrusion feeding mechanism, and the feeding buffer bin is arranged above the extrusion feeding mechanism.

Further, the extruded strand feeding mechanism includes a crusher and an extruded strand machine.

Further, the above-mentioned mesh belt includes a support mesh belt and a leak-proof mesh belt arranged superimposed on each other.

Further, the above-mentioned mesh belt is provided with multiple layers from top to bottom, and the end of the upper layer mesh belt is connected to the beginning end of the lower layer mesh belt.

Further, the inside of the drying box is provided with an air equalizing plate.

Further, the above-mentioned heating cycle mechanism includes a primary heat recovery device, a heat pump evaporator and a centrifugal fan. The inlet is connected, the cold side outlet of the primary heat recovery unit is connected to the supplementary air outlet, the cold air outlet of the heat pump evaporator is connected to the suction outlet of the centrifugal fan, and the heat pump evaporator is connected to the heat pump condenser through copper pipes.

Further, a temperature sensor and a humidity sensor are provided in the drying box, and a flow sensor is provided at the air inlet and the air outlet of the primary heat recovery device.

Further, the outlet of the drying box is provided with a discharge buffer bin, and the outlet of the discharge buffer bin is connected to a screw conveyor.

Compared with the prior art, the utility model has the beneficial effects:

(1) The sludge dehumidification and drying system provided by the utility model recovers the heat in the dehumidification gas through the heating cycle mechanism for recycling, which saves energy consumption. Compared with gas, it can save energy by more than 20%, and it can save energy compared with fuel oil. above 50.

(2) In the sludge dehumidification and drying system provided by the utility model, the sludge adopts a fully enclosed low-temperature (less than 80°C) drying process in the drying box, which reduces the volatilization of volatile substances in the sludge, The material temperature is low and the oxygen content is low, which can effectively ensure the safe operation of the system.

(3) The sludge dehumidification and drying system provided by the utility model can send the odor generated in the system to the purification device for treatment through the centrifugal fan and discharge it up to the standard, without causing secondary environmental pollution and meeting the environmental protection requirements.

(4) The sludge dehumidification and drying system provided by the utility model utilizes ambient air for heating and does not require an additional heat source. Electric energy is the only energy source of the system, which is not limited by heat sources and has a wide range of applications.

The utility model will be described in further detail below in conjunction with the accompanying drawings.

Description of drawings

Figure 1 is a schematic diagram of the working process of the sludge dehumidification and drying system of the present invention.

Fig. 2 is a top view of the sludge dehumidification and drying system of the present invention.

Fig. 3 is a front view of the sludge dehumidification and drying system of the present invention.

Fig. 4 is a right view of the sludge dehumidification and drying system of the present invention.

Fig. 5 is a schematic diagram of the operation process of the sludge dehumidification and drying system from the right side of the utility model.

Explanation of Reference Signs: 1. Drying box; 2. Circulating fan; 3. Windshield; 4. Air supply port; 5. Dehumidification port; 6. Heat pump condenser; 7. Primary heat recovery device; 8. Copper Tube; 9. Heat pump compressor; 10. Expansion valve; 11. Heat pump evaporator; 12. Centrifugal fan; 13. Mesh belt; 14. Screw conveyor; 17. Feed buffer bin; 18. Evening plate; 19. Partition.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, Figure 2, Figure 3, Figure 4 and Figure 5, this embodiment provides a sludge dehumidification and drying system, including a drying box 1, and the drying box 1 is provided with a feed The bottom of the drying box 1 is provided with a discharge port, and one side of the drying box 1 is provided with a mesh belt 13 for transporting sludge. One end of the mesh belt 13 is located directly below the feed port, and the discharge port is located at the Right below the end of 13, the other side of the drying box 1 is provided with a heat pump condenser 6, the mesh belt 13 is separated from the heat pump condenser 6 by a partition 19, and the bottom of the partition 19 is provided with an air vent through which the The heat pump condenser 6 communicates with the mesh belt 13. The drying box 1 is provided with a circulation fan 2 to form air circulation in the drying box 1. The circulation fan 2 is preferably controlled by frequency conversion to adjust the circulation in the drying box 1. air volume, the top of the drying box 1 is provided with an air supply port 4 and a moisture discharge port 5, the air supply port 4 and the moisture discharge port 5 are connected to a heating cycle mechanism, and the humidity exhausted air discharged from the moisture discharge port 5 and the ambient air are heated The circulation mechanism performs heat exchange, and the heated ambient air enters the inside of the drying box 1 through the supplementary air port 5 and is used for low-temperature drying of the sludge again.

Detailed implementation, as shown in Figure 1, the heating cycle mechanism includes a primary heat recovery device 7, a heat pump evaporator 11 and a centrifugal fan 12, and the dehumidification port 5 is connected to the hot side inlet of the primary heat recovery device 7 Connection, the hot side outlet of the primary heat recovery device 7 is connected to the gas inlet of the heat pump evaporator 11, the cold side outlet of the primary heat recovery device 7 is connected to the supplementary air outlet 4, and the cold air outlet of the heat pump evaporator 11 is connected to the suction port of the centrifugal fan 12 , the heat pump evaporator 11 is connected to the heat pump condenser 6 through a copper pipe 8 . The dehumidified gas generated in the drying box 1 enters the hot side of the primary heat recovery device 7 through the dehumidification port 5 for heat exchange and cooling, and the ambient air enters the primary heat recovery device 7 through the cold side of the primary heat recovery device 7 for cooling. After heat exchange and heating, the heated ambient air enters the interior of the drying box 1 through the supplementary air port 4 on the top of the drying box 1, realizing primary heat recovery of the dehumidified gas, and the cooled dehumidified gas is further cooled by the heat pump evaporator 11, The cooled dehumidified gas is discharged to the tail gas purification device through the centrifugal fan 12 to realize secondary heat recovery of the dehumidified gas. The heat pump evaporator 11 is connected to the heat pump condenser 6 through a copper tube 8, and the copper tube 8 is provided with a heat pump compressor 9 and an expansion valve 10. After the low-pressure steam is compressed by the heat pump compressor 9, it becomes high-temperature and high-pressure steam and enters the heat pump condenser 6 to release heat. The hot air generated by the heat release of the heat pump condenser 6 heats up the sludge from the bottom of the mesh belt 13 through the circulating fan 2 and releases heat at the same time. The final low-temperature and high-pressure liquid passes through the expansion valve 10 to become a low-temperature and low-pressure liquid and flows back to the heat pump evaporator 11 to realize the circulation of the heating working medium.

Further, the drying box 1 is provided with a temperature sensor and a humidity sensor, and the temperature and humidity in the drying box 1 can be detected in real time through the temperature sensor and the humidity sensor, so that the sludge can be dried within the required range of the design process conditions. The effect of sludge drying is improved. The air inlet and outlet of the primary heat recovery device 7 are provided with flow sensors. By adjusting the air intake and output volume of the primary heat recovery device 7, the sludge treatment capacity is guaranteed And the moisture content of the output material can be adjusted within a certain range (10-40%) to meet various subsequent processing requirements.

In addition, in a preferred embodiment, the inside of the drying box 1 is provided with an air equalizing plate 18 for evenly distributing the hot air coming in from the heat pump condenser 6 so that the sludge is evenly heated. The drying box 1 can be divided into multiple sections according to the processing requirements, and two adjacent sections are separated by a windshield 3, and the sludge to be dried on the mesh belt 13 passes through each section of the drying box 1 in turn, and each section A heat pump condenser 6 and a circulation fan 2 are correspondingly arranged respectively to further improve the drying effect of the sludge. Equally, described mesh belt 13 can be provided with multi-layer from top to bottom according to processing requirement, and the end of upper layer mesh belt is connected with the beginning of lower floor mesh belt, and described mesh belt 13 comprises support mesh belt and leak-proof mesh belt that are superimposedly arranged, Through the design of the multi-layer mesh belt, the drying time of the sludge in the drying box 1 is increased, so that the sludge is dried more thoroughly, and the moisture content of the sludge discharge can be as low as 10%.

The feed inlet is provided with a feed buffer bin 17 and an extrusion feed mechanism 16, the feed buffer bin 17 is arranged above the extrude feed mechanism 16, and the extrude feed mechanism 16 includes a crusher and an extruder. bar machine; the feeding buffer bin 17 is used for short-term storage of the sludge to be dried, so that the sludge treatment capacity in the drying box 1 can be effectively controlled, and the setting of the extrusion feeding mechanism 16 is used for large The lumps of sludge are crushed and squeezed to make the sludge dry more evenly and thoroughly. The outlet of the drying box 1 is provided with a discharge buffer bin 15 for short-term storage of dried sludge, the outlet of the discharge buffer bin 15 is connected to a screw conveyor 14, and the dried sludge is passed through the screw conveyor 14. Sludge is discharged and conveyed.

In summary, the sludge dehumidification and drying system provided by the utility model adopts low-temperature drying (less than 80°C), so that the content of volatile substances in the tail gas is small, and the treatment cost is small. The entire drying process is carried out in a closed environment. No odor is discharged into the external environment and meets environmental protection requirements; belt drying equipment and electric energy are used as the only energy source, suitable for various types of sludge drying systems, stable operation, and less maintenance parts; two-stage heat recovery process is adopted , greatly improve the heat utilization efficiency of the drying system, and the system is safe to operate without nitrogen filling, and there is no hidden danger of explosion.

The above examples are only illustrations of the utility model, and do not constitute a limitation to the protection scope of the utility model. All designs identical or similar to the utility model all belong to the protection scope of the utility model.

Claims (10)

1. a kind of sludge hydrofuge anhydration system, including drying box (1), it is characterised in that：The drying box (1) be provided with into Material mouth, drying box (1) bottom is provided with discharging opening, guipure (13) of the interior side of the drying box (1) provided with transport sludge, net Band (13) one end part is immediately below charging aperture, and discharging opening is located at the underface of guipure (13) end, drying box (1) opposite side Provided with heat pump condenser (6), guipure (13) is separated by with heat pump condenser (6) by dividing plate (19), and dividing plate (19) bottom is provided with Ventilating opening, the drying box (1) is provided with the top of circulating fan (2), the drying box (1) provided with wind-supplying mouth (4) and row Wet mouth (5), the wind-supplying mouth (4) and moisture exhausting port (5) connection heat cycles mechanism.

2. sludge hydrofuge anhydration system as claimed in claim 1, it is characterised in that：The drying box (1) is divided into more piece, phase Separated between the section of neighbour two by deep bead (3), and often save and be correspondingly arranged a heat pump condenser (6) and circulating fan (2) respectively.

3. sludge hydrofuge anhydration system as claimed in claim 1, it is characterised in that：The charging aperture is provided with feed surge storehouse (17) and extrusion feeding mechanism (16), the feed surge storehouse (17) is arranged on above extrusion feeding mechanism (16).

4. sludge hydrofuge anhydration system as claimed in claim 3, it is characterised in that：The extrusion feeding mechanism (16) includes broken Broken machine and banded extruder.

5. sludge hydrofuge anhydration system as claimed in claim 1, it is characterised in that：The guipure (13) includes superimposed set Supporting network band and leakproof guipure.

6. sludge hydrofuge anhydration system as claimed in claim 1, it is characterised in that：The guipure (13) is from top to bottom provided with more Layer, and upper wire end of tape is connected with lower net rim end.

7. sludge hydrofuge anhydration system as claimed in claim 1, it is characterised in that：Provided with equal inside the drying box (1) Aerofoil (18).

8. sludge hydrofuge anhydration system as claimed in claim 1, it is characterised in that：The heat cycles mechanism includes one-level heat Recover (7), evaporator with heat pump (11) and centrifugal blower (12), the moisture exhausting port (5) and one-level heat regenerator (7) hot side entrance Connection, one-level heat regenerator (7) hot side outlet is connected with evaporator with heat pump (11) gas access, one-level heat regenerator (7) cold side Outlet connection wind-supplying mouth (4), the cold air air outlet of evaporator with heat pump (11) is connected with centrifugal blower (12) suction opeing, the heat Pump evaporator (11) is connected by copper pipe (8) with heat pump condenser (6).

9. sludge hydrofuge anhydration system as claimed in claim 8, it is characterised in that：Temperature is provided with the drying box (1) Sensor and humidity sensor, one-level heat regenerator (7) air inlet and air outlet are provided with flow sensor.

10. sludge hydrofuge anhydration system as claimed in claim 1, it is characterised in that：On the discharging opening of the drying box (1) Provided with discharging buffering chamber (15), discharging buffering chamber (15) outlet connection conveying worm (14).