Sludge drying and airing device

Abstract

The utility model discloses a sludge drying and airing device which comprises a drying and airing machine body, a drying and airing space is arranged in the drying and airing machine body, and a plurality of sludge conveying assemblies are arranged in the drying and airing space from top to bottom in a staggered mode. A heating and drying assembly communicating with the drying and airing space is further arranged in the drying and airing machine body and comprises an electric heater and a centrifugal fan arranged at an opening in the lower end of an electric heating coil. The sludge slitting machine is designed at the feed port of the drying and airing machine body, so that the fed sludge can be crushed and slit, the size of the fed sludge can be reduced, and the subsequent drying and airing quality of the sludge can be improved; and secondly, the heat exchange assembly is designed at the heat extraction end of the drying and airing machine body, exhausted hot air can heat exhausted fresh air, and therefore the heating power of a follow-up electric heater can be reduced, and recycling of heat resources is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sludge drying treatment technical field, concretely is a kind of sludge drying and airing device. BACKGROUND

[0002] Sludge treatment is an important part of wastewater treatment, but due to the high moisture content of sludge, drying and airing treatment must be carried out before advanced treatment. Currently, sludge belt dryer is usually used for drying and airing operation of sludge, and its working principle is mainly to realize drying and airing of sludge through two heat transfer processes.

[0003] At present, when low-temperature belt dryer is drying and airing, sludge needs to be poured into low-temperature belt dryer. Since high-moisture sludge is easy to form into blocks, it is difficult to dry the blocky sludge completely when pouring into the dryer for drying, resulting in that the moisture content of blocky sludge is still high, which affects the quality of subsequent sludge treatment. Secondly, hot gas is currently used to realize drying operation of sludge. After drying, the hot gas with moisture will be directly discharged through the waste gas purification system, which will cause waste of heat resources.

[0004] Therefore, a sludge drying and airing device is provided. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at solving the above-mentioned problems and provides a sludge drying and airing device.

[0006] The utility model adopts the following technical scheme: a sludge drying and airing device, comprising a drying and airing machine body, the drying and airing machine body has a drying and airing space inside, a plurality of groups of sludge conveying assemblies are staggered from top to bottom in the drying and airing space;

[0007] The drying and airing machine body is further provided with a heating and drying assembly which is communicated with the drying and airing space, the heating and drying assembly comprises an electric heater and a centrifugal fan which is arranged at the opening of the lower end of the electric heating coil pipe;

[0008] The upper end of the drying and airing machine body is provided with an air extraction member and a sludge slitting machine which are communicated with the drying and airing space, the air outlet end of the air extraction member is provided with a heat exchange assembly, the heat outlet end of the heat exchange assembly is communicated with the upper end opening of the electric heater, for realizing recovery of waste heat.

[0009] In a preferred embodiment, the sludge conveying assembly is a belt conveyor, and the two sides of the belt in the belt conveyor are provided with continuous baffles which are higher than the height of the belt.

[0010] In a preferred embodiment, the heat exchange assembly comprises a heat exchanger, a fresh air outlet pipe and a waste gas inlet pipe, the top of the heat exchanger is provided with a fresh air inlet connected with the outside, the fresh air inlet is internally provided with an air pump, one side of the bottom of the heat exchanger is provided with a fresh air outlet connected with the fresh air inlet, the fresh air outlet pipe is arranged between the fresh air outlet and the upper end opening of the electric heater, the left and right sides of the heat exchanger are respectively provided with a waste gas outlet and a waste gas inlet, the waste gas inlet pipe is arranged between the air exhaust component and the waste gas inlet, and the heat exchanger is internally provided with a heat exchange copper coil connected with the waste gas outlet and the waste gas inlet.

[0011] In a preferred embodiment, the sludge cutting machine has a cutting roller group for cutting sludge inside, and the bottom of the sludge cutting machine has a discharge port arranged above the feeding side of the sludge conveying assembly at the uppermost end of the drying and airing space.

[0012] In a preferred embodiment, a spiral conveyor is further included, one end of the spiral conveyor extends into the drying and airing space, and the spiral conveyor has a feeding port arranged above the discharging side of the sludge conveying assembly at the lowermost end of the drying and airing space.

[0013] In a preferred embodiment, the outer end of the drying and airing machine body is provided with a plurality of maintenance door bodies.

[0014] In a preferred embodiment, the bottom of the drying and airing space is provided with a ventilation port connected with the air outlet end of the centrifugal fan.

[0015] In a preferred embodiment, a plurality of electric heating sheets are arranged at intervals inside the electric heater, and the electric heating sheets are provided with passages for gas flow between each other.

[0016] In a preferred embodiment, the air exhaust component is a fan, the upper end of the drying and airing machine body is provided with a dehumidifier, and the air inlet end and the air outlet end of the dehumidifier are connected with the circulating pipeline.

[0017] In a preferred embodiment, the front end of the drying and airing machine body is further provided with a control panel.

[0018] In summary, due to the adoption of the above technical scheme, the present application has the following beneficial effects:

[0019] 1、In the present application, a sludge cutting machine is designed at the feeding port of the drying and airing machine body, which can crush and cut the input sludge, reduce the size of the input sludge, and improve the subsequent drying and airing quality.

[0020] 2、The utility model discloses a heat exchange component is designed to the heat exhaust end of dry airing machine body, and the exhaust gas with heat can heat the new air of exhaust through the heat exchanger, and the new air after heating is arranged into the electric heater, can reduce the power of electric heater in heating to the same temperature, realizes the recycling of heat resources.

[0021] 3、The utility model discloses a sludge conveying assembly, sludge slitting machine, heating drying assembly are integrated in dry airing machine body, can make the whole structure more compact, reduces the land occupation of whole and cost. DRAWINGS

[0022] Figure 1 It is the front view plane structure schematic diagram of the whole utility model.

[0023] Figure 2 It is the front view plane structure schematic diagram of the whole utility model after removing maintenance door body.

[0024] Figure 3 It is the three-dimensional structure schematic diagram of the whole utility model after removing maintenance door body and heat exchange component.

[0025] Figure 4 It is the plan view structure schematic diagram of the whole utility model.

[0026] Mark in drawing: 1-screw conveyor, 101-feed inlet, 2-dry airing machine body, 3-heat exchanger, 4-new air exhaust pipe, 5-sludge slitting machine, 501-discharge port, 502-slitting roller group, 6-exhaust component, 7-control panel, 8-electric heater, 9-centrifugal fan, 10-sludge conveying assembly, 11-baffle, 12-vent, 13-waste gas exhaust pipe. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is in conjunction with the drawings and example, and the utility model is further detailedly explained. It should be understood that the specific example described here is only used to explain the utility model, and is not used to limit the utility model.

[0028] REFERENCE Figures 1-4The utility model provides a kind of sludge drying and airing device, including drying and airing machine body 2, drying and airing space is inside drying and airing machine body 2, and drying and airing space is staggered from top to bottom with multiple groups of sludge conveying components 10, drying and airing machine body 2 inside is further provided with the heating drying component being communicated with drying and airing space, heating drying component includes electric heater 8 and is located at the opening of centrifugal fan 9 of electric heating coil pipe 8 lower end, drying and airing space bottom has the vent 12 being communicated with the air outlet end of centrifugal fan 9, electric heater 8 is spaced apart with multiple groups of electric heating sheet, and the passage for gas flow is between two electric heating sheets, when drying sludge, sludge is input on sludge conveying component 10, sludge is transported in section by sludge conveying component 10, in the process of conveying, electric heater 8 heats air, then air is blown into drying and airing space by centrifugal fan 9, sludge can be heated and dried.

[0029] In addition, multiple sludge conveying components 10 are designed as vertical type, and the overall floor area can be also saved.

[0030] Further, the upper end of drying and airing machine body 2 is provided with air extraction member 6 and sludge slitting machine 5 being communicated with drying and airing space, air extraction member 6 is fan, and heated air can be extracted from drying and airing space lower direction to upper by air extraction member 6, in the process of heat moving upward, sludge on sludge conveying component 10 can be heated and dried.

[0031] Further, sludge slitting machine 5 is provided with slitting roller group 502 for slitting sludge inside, and the bottom of sludge slitting machine 5 is provided with discharge port 501, discharge port 501 is arranged above the feeding side of the uppermost sludge conveying component 10 of drying and airing space, sludge slitting machine 5 is designed at the feeding port of drying and airing machine body 2, and sludge can be crushed and slit, so that the size of input sludge can be reduced, thereby improving the drying and airing quality of subsequent, wherein the power source of slitting roller group 502 comes from driving motor.

[0032] Further, the air outlet end of the air extraction member 6 is provided with a heat exchange assembly, the heat outlet end of the heat exchange assembly is connected with the upper end opening of the electric heater 8, and the heat exchange assembly is used for recycling waste heat. The heat exchange assembly comprises a heat exchanger 3, a fresh air exhaust pipe 4 and a waste gas exhaust pipe 13. The top of the heat exchanger 3 is provided with a fresh air exhaust inlet 301 connected with the outside. The fresh air exhaust inlet 301 is internally provided with an air extraction pump (not shown in the figure). The bottom of the heat exchanger 3 is provided with a fresh air exhaust outlet connected with the fresh air exhaust inlet 301. The fresh air exhaust pipe 4 is arranged between the fresh air exhaust outlet and the upper end opening of the electric heater 8. The left and right sides of the heat exchanger 3 are respectively provided with a waste gas exhaust outlet and a waste gas exhaust inlet. The waste gas exhaust pipe 13 is arranged between the air extraction member and the waste gas exhaust inlet. The heat exchanger 3 is internally provided with a heat exchange copper coil (not shown in the figure) connected with the waste gas exhaust outlet and the waste gas exhaust inlet. The heat exchange assembly is designed at the air outlet end of the drying and airing machine body 2. The exhaust waste gas with heat can heat the exhaust fresh air through the heat exchanger 3. The heated fresh air is exhausted into the electric heater 8, so that the power of the electric heater 8 for heating air to the same temperature can be reduced, and the recycling of heat resources is realized.

[0033] The fresh air exhaust inlet 301 is detachably provided with a filter screen, which can filter dust and impurities in the air. The air extraction pump can be replaced by a fan or other air extraction equipment. The waste gas exhaust inlet can be connected with an external waste gas treatment system (not shown in the figure).

[0034] It should be noted that the principle of the heat exchanger 3 is to realize heat exchange through the good heat conduction performance of the copper pipe itself. Since the heat exchanger 3 is an existing technology, the internal structure is not described in detail.

[0035] Further, the sludge conveying assembly 10 is a belt conveyor. The two sides of the belt of the belt conveyor are provided with continuous baffles 11 higher than the height of the belt. The belt conveyor is an existing technology, and the specific description is omitted. The baffles 11 designed on the two sides can prevent materials from falling from the two sides of the conveying belt of the belt conveyor.

[0036] The width of the discharge port 501 of the sludge slitting machine 5 is less than the width of the conveying belt of the belt conveyor.

[0037] Further, the screw conveyor 1 is further provided. One end of the screw conveyor 1 extends into the drying and airing space. The screw conveyor 1 has a feeding port 101. The feeding port 101 is arranged above the discharge side of the sludge conveying assembly 10 at the lowermost end of the drying and airing space. The screw conveyor 1 can conveniently transfer the dried materials to the next processing stage. In addition, other screw conveyors 1 can be externally arranged to realize the feeding operation of the sludge slitting machine 5.

[0038] Further, the outer end of the drying and airing machine body 2 is provided with a plurality of sets of maintenance door bodies, through which the internal components can be conveniently maintained, and the front end of the drying and airing machine body 2 is also provided with a control panel 7 (which needs to be externally connected to a power source), wherein the control panel 7 is electrically connected with the internal equipment of the drying and airing machine body 2, and the operation of the whole drying and airing machine body 2 is controlled through the control panel 7.

[0039] Among them, the drying and airing space can also be designed, such as a temperature and humidity sensor, which can monitor the temperature and humidity changes in the drying and airing space.

[0040] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sludge drying and airing device comprising a drying and airing machine body, characterized by: The drying and airing machine body has a drying and airing space inside, and a plurality of sludge conveying assemblies are staggered from top to bottom in the drying and airing space; The drying and airing machine body further has a heating and drying assembly communicating with the drying and airing space, and the heating and drying assembly comprises an electric heater and a centrifugal fan arranged at an opening of a lower end of the electric heating coil pipe; An air exhaust member and a sludge slitting machine are arranged at an upper end of the drying and airing machine body and communicate with the drying and airing space, and a heat exchange assembly is arranged at an air outlet end of the air exhaust member, and a heat outlet end of the heat exchange assembly communicates with an upper end opening of the electric heater to realize waste heat recovery.

2. A sludge drying and sunning apparatus as claimed in claim 1, characterized in that: The sludge conveying assembly is a belt conveyor, and continuous baffles higher than the belt are arranged at both sides of the belt.

3. A sludge drying and sunning apparatus as claimed in claim 1, characterized in that: The heat exchange assembly comprises a heat exchanger, a fresh air outlet pipe and a waste gas inlet pipe, the heat exchanger has a fresh air inlet communicating with the outside, and a suction pump is arranged in the fresh air inlet, one side of a bottom of the heat exchanger is provided with a fresh air outlet communicating with the fresh air inlet, the fresh air outlet pipe is arranged between the fresh air outlet and the upper end opening of the electric heater, the heat exchanger has a waste gas outlet and a waste gas inlet at left and right sides respectively, the waste gas inlet pipe is arranged between the air exhaust member and the waste gas inlet, and the heat exchanger further has a heat exchange copper coil pipe communicating with the waste gas outlet and the waste gas inlet.

4. A sludge drying and sunning apparatus as claimed in claim 1, wherein: The sludge slitting machine has a slitting roller group for slitting sludge, and the sludge slitting machine has a discharge port at a bottom thereof, and the discharge port is arranged above a feeding side of the uppermost sludge conveying assembly in the drying and airing space.

5. A sludge drying and sunning apparatus as claimed in claim 1, wherein: A screw conveyor is further arranged, one end of the screw conveyor extends into the drying and airing space, and the screw conveyor has a feeding port arranged above a discharging side of the lowermost sludge conveying assembly in the drying and airing space.

6. A sludge drying and sunning apparatus as claimed in claim 1, characterized in that: A plurality of maintenance door bodies are arranged at outer ends of the drying and airing machine body.

7. A sludge drying and sunning apparatus as claimed in claim 1, wherein: The drying and airing space has a ventilation port at a bottom thereof and communicating with an air outlet end of the centrifugal fan.

8. A sludge drying and sunning apparatus as claimed in claim 1, characterized in that: A plurality of electric heating sheets are arranged at intervals in the electric heater, and a channel for gas flow is arranged between every two electric heating sheets.

9. A sludge drying and sunning apparatus as claimed in claim 1, wherein: The air exhaust member is a fan.

10. A sludge drying and sunning apparatus as claimed in claim 1, wherein: The drying and airing machine body further has a control panel at a front end thereof.

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