CN211575803U - Paint slag low-temperature continuous drying device - Google Patents

Abstract

The utility model discloses a paint slag low-temperature continuous drying device, which comprises a drying box (10), wherein a conveying belt (6) for circular feeding is arranged in the drying box, a feeding hole (4), an air supply outlet (8), a discharging hole (9) and a return air inlet (22) are arranged on the drying box, one end of the conveying belt is arranged below the feeding hole (4), and the other end of the conveying belt is arranged above the discharging hole (9); and the air return opening (22) is sequentially communicated with a condensing box (14) of the evaporation system (21), a heating box (11) of the condensing system (12) and the air supply opening (8) through pipelines. The utility model discloses simple process, the waste water easy to handle that the filter-out was pressed, and do not produce new waste gas, the energy waste is very little simultaneously, and the dehydration is with low costs, realizes automated production easily after adding automatic supporting measure.

Description

Paint slag low-temperature continuous drying device

Technical Field

The utility model relates to a danger wastes material drying device, concretely relates to paint sediment low temperature continuous drying device.

Background

Paint slag is a dangerous waste, and the production process comprises the following steps: the paint is scattered in water in the operation processes of spraying and the like, and is formed after being collected and dehydrated by a plate filter press. Paint residues typically contain 40% to 80% water, which causes additional costs in the handling and transfer of the paint residues. The water content of the paint slag is reduced, and the paint slag is not only advocated by national environmental protection, but also is a key outlet for the requirements of waste production enterprises. For example: if the paint slag containing 70% of water can be dehydrated to 10%, the cost of dangerous waste treatment is reduced by 67%, and the cost of dangerous waste transfer transportation can be greatly reduced.

Present drying device generally adopts high temperature drying, and this kind of drying device can make if being used for the stoving of paint sediment: firstly, new wastewater which is difficult to treat is generated, the COD of the wastewater reaches more than one hundred thousand, the wastewater contains various high-toxicity substances, and the treatment cost is high; secondly, the generated waste gas needs a special tail gas treatment device and may contain carcinogenic dioxin; thirdly, the drying energy consumption is high and the cost is high.

Therefore, it is necessary to develop a low-temperature drying device suitable for drying paint residues.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a paint slag low-temperature continuous drying device is provided to the not enough that current drying device is not suitable for paint slag drying.

In order to solve the technical problem, the utility model provides a paint sediment low temperature continuous drying device, including the stoving case, the stoving incasement sets up the conveyer belt that is used for the circulation pay-off, be equipped with feed inlet, supply-air outlet, discharge gate and return air inlet on the stoving case, wherein:

one end of the conveying belt is arranged below the feeding hole, and the other end of the conveying belt is arranged above the discharging hole;

and the air return inlet is sequentially communicated with a condensing box of the evaporation system, a heating box of the condensing system and the air supply outlet through pipelines.

The utility model discloses an regard as the return air after collecting the hot-blast collection of drying to send into the stoving case again as the air supply after dehumidification, intensification processing to the return air through vaporization system, condensing system, thereby realize the continuous low temperature drying to the paint sediment.

Furthermore, the air supply outlet is arranged near the discharge port, and the air inlet direction of the air supply outlet is opposite to the advancing direction of the materials on the conveying belt, so that the contact time of the materials on the conveying belt and the hot air is longer, and the hot air contacted by the materials closer to the discharge port is drier, and the drying effect is better.

Furthermore, a material layer thickness adjusting device is arranged between the feeding hole and the conveying belt, so that the thickness of materials on the conveying belt is controllable, and the drying effect is guaranteed.

Furthermore, the condensing system comprises a plurality of stages of heating boxes which are sequentially connected in series and communicated through an air supply pipe, and condensing pipes are respectively arranged in each heating box; the evaporation system comprises a plurality of stages of condensing boxes which are sequentially connected in series and communicated through an air supply pipe, and evaporation pipes are respectively arranged in each condensing box. Thus, after the return air is cooled by the multistage condensation box, moisture in the return air is basically condensed into water and is discharged by the drain pipe, and the water enters the multistage heating pipe for multistage temperature rise and then is sent into the drying box to be used as hot air for drying.

Furthermore, a drain pipe is arranged at the bottom of the condensing box and is connected with a wastewater pool through a pipeline so as to collect wastewater generated in the drying process.

Furthermore, a compressor and a refrigerant tank are arranged between the condensing pipe of the condensing system and the evaporating pipe of the evaporating system, a refrigerant outlet of the compressor is connected with an inlet of each condensing pipe, and an outlet of each condensing pipe is connected with a refrigerant return port of the refrigerant tank; the refrigerant inlet of the compressor is connected with the outlet of each evaporation pipe, and the inlet of each evaporation pipe is connected with the refrigerant outlet of the refrigerant tank, so that a set of compressor and the refrigerant tank are utilized to provide refrigerant, the cost is saved, and the manufacturing cost is reduced.

Furthermore, an air inlet of a first-stage heating box of the condensing system is connected with an air outlet of a last-stage condensing box of the evaporating system through an air pump so as to improve the flow rate of return air and ensure the hot air supply of the drying box.

Furthermore, a filter screen is arranged in the air return inlet to prevent large-particle dust from entering the air return pipe along with the air outlet.

Compared with the prior art, the beneficial effects of the utility model are that:

1. low energy consumption. The electricity consumption is only 0.33 degree per 1Kg of water dried. While the traditional process needs 1 degree of electricity for drying 1Kg of water.

2. And the maintenance cost is low. Due to the simple design principle, the maintenance cost is only equivalent to the maintenance of one air conditioner.

3. And the running cost is low. The utility model discloses equipment can be convenient install full automated control additional, central monitoring does not need to set up the post very much, only needs routine inspection every day.

4. No odor and zero emission. The drying process is carried out in a closed space, and zero emission of gas is realized. The drying temperature in the treatment process is controllable, and is about 70 ℃, so that the generation of irritability and harmful gas is avoided.

5. The quality of the condensed water is ensured. Because the evaporation temperature is low, the COD of distilled water can be controlled to be about 400, and the treatment is very easy.

6. No explosion hazard. Low temperature drying reduces the ignition energy of a possible ignition source, thereby avoiding the risk of explosion.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a return air duct; 2. wet hot air; 3. a filter screen; 4. a feed inlet; 5. a material layer thickness adjusting device; 6. a conveyor belt; 7. a belt pulley; 8. an air supply outlet; 9. a discharge port; 10. a drying box; 11. a heating box; 12. a condensing system; 13. a compressor; 14. a condenser tank; 15 a wastewater tank; 16. a refrigerant tank; 17. an air supply pipe; 18. an air pump; 19. a valve; 20. a drain pipe; 21 an evaporation system; 22. an air return opening; 23. a condenser tube; 24. and (4) an evaporation tube.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

For convenience of description, the relative positional relationship of the components, such as: the descriptions of the upper, lower, left, right, etc. are described with reference to the layout directions of the drawings in the specification, and do not limit the structure of the present patent.

Example 1:

as shown in fig. 1, an embodiment of the present invention includes a drying box 10, a condensing system 12, an evaporating system 21, and a wastewater disposal 15.

The drying box 10 is provided with a feeding hole 4, an air supply hole 8, a discharge hole 9 and a return air inlet 22.

The drying box 10 is internally provided with a conveying belt 6, the conveying belt 6 is wound on two groups of belt pulleys 7 which are separately arranged and can rotate around the belt pulleys 7 under the driving of the belt pulleys 7, one end of the conveying belt 6 is arranged below the feeding hole 4, and the other end of the conveying belt 6 is arranged above the discharging hole 9.

The air supply outlet 8 is arranged near the discharge outlet 9, and the air inlet direction is opposite to the advancing direction of the materials on the conveying belt 6.

A material layer thickness adjusting device 5 is arranged between the feed port 4 and the conveying belt 6 to adjust the material layer thickness of the paint slag on the conveying belt 6.

The condensing system 12 comprises a plurality of stages of heating boxes 11 which are sequentially connected in series and communicated through an air supply pipe, and condensing pipes 23 are respectively arranged in each heating box 11.

The evaporation system 21 comprises a plurality of stages of condensation boxes 14 which are sequentially connected in series and communicated through an air supply pipe, evaporation pipes 24 are respectively arranged in each condensation box 14, drain pipes 20 are arranged at the bottom of each condensation box 14, and each drain pipe 20 is respectively connected with a wastewater disposal basin 15.

A compressor 13 and a refrigerant tank 16 are arranged between the condensing pipe 23 of the condensing system 12 and the evaporating pipe 24 of the evaporating system 21, the refrigerant outlet of the compressor 13 is connected with the inlet of each condensing pipe 23, and the outlet of each condensing pipe 23 is connected with the refrigerant return opening of the refrigerant tank 16; the refrigerant inlet of the compressor 13 is connected to the outlet of each evaporation tube 24, and the inlet of each evaporation tube 24 is connected to the refrigerant outlet of the refrigerant tank 16.

An air inlet of a first-stage heating box of the condensing system 12 is connected with an air outlet of a final-stage condensing box 14 of the evaporating system 21 through an air pump 18, and an air outlet of a final-stage heating box of the condensing system 12 is connected with an air supply outlet 8 of the drying box 10 through an air supply pipe 17; the air return opening 22 of the drying box 10 is connected with the air inlet of the first-stage condensation box of the evaporation system 21 through the air return pipe 1.

A filter screen 3 is arranged in the return air inlet 22 to prevent large-particle dust from entering the return air pipe 1 along with the outlet air.

The utility model discloses during the use, material (moisture paint sediment) gets into stoving case 10 through feed inlet 4 to on falling the conveyer belt 6 of stoving incasement installation, through bed of material thickness adjusting device 5 after adjusting the bed of material thickness of material on conveyer belt 6, moisture paint sediment removes along with conveyer belt 6. The dry hot air is fed from the air supply opening 8 through the air supply pipe 17, the direction of the hot air fed from the air supply opening 8 is opposite to the advancing direction of the materials, under the action of the dry hot air, moisture in the paint residues is rapidly evaporated into the hot air, and the hot air with humidity enters the return air pipe 1 from the position near the feed opening 4 through the return air inlet 22.

The refrigerant in the refrigerant tank 16 enters the evaporation system 21 under the action of the compressor 13, and the refrigerant rapidly evaporates to absorb heat, so that the temperature in each condensation box 14 is rapidly reduced, and then the refrigerant returns to the condensation system 12 to perform condensation and heat release, so that the temperature of each heating box 11 is rapidly increased.

The damp and hot air enters the condensing box 14 of the evaporation system 21 through the return air pipe 1 and sequentially passes through each stage of condensing box, the damp and hot air is rapidly cooled in the condensing box 14 and condenses the damp into liquid water, and the liquid water enters the wastewater pool 15 through the drain pipe 20 of the condensing box 14. The dried cold air is conveyed into a heating box 11 of a condensing system 12 through an air pump 18 to be heated step by step, the temperature of the dried air heated by the condensing system 12 is 60-75 ℃, and the dried air enters a drying box 10 through an air supply pipe 17 and an air supply outlet 8.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims (8)

1. A low-temperature continuous drying device for paint residues comprises a drying box (10), wherein a conveying belt (6) for circular feeding is arranged in the drying box, a feeding hole (4), an air supply outlet (8), a discharging hole (9) and an air return opening (22) are arranged on the drying box, and is characterized in that,

one end of the conveying belt is arranged below the feeding hole (4), and the other end of the conveying belt is arranged above the discharging hole (9);

and the air return opening (22) is sequentially communicated with a condensing box (14) of the evaporation system (21), a heating box (11) of the condensing system (12) and the air supply opening (8) through pipelines.

2. The paint slag low-temperature continuous drying device according to claim 1, wherein the air supply opening (8) is arranged near the discharge opening (9), and the air supply direction of the air supply opening is opposite to the advancing direction of materials on the conveying belt.

3. The paint slag low-temperature continuous drying device according to claim 1, characterized in that a material layer thickness adjusting device (5) is arranged between the feeding hole (4) and the conveying belt (6).

4. The paint slag low-temperature continuous drying device according to claim 1, wherein the condensing system (12) comprises a plurality of stages of heating boxes (11) which are sequentially connected in series and communicated through an air supply pipe, and a condensing pipe (23) is respectively arranged in each heating box; the evaporation system (21) comprises a plurality of stages of condensation boxes (14) which are sequentially connected in series and communicated through an air supply pipe, and evaporation pipes (24) are respectively arranged in each condensation box.

5. The paint slag low-temperature continuous drying device as claimed in claim 1, wherein a drain pipe (20) is installed at the bottom of the condensation box and is connected with a wastewater pool (15) through a pipeline.

6. The paint slag low-temperature continuous drying device according to claim 4, wherein a compressor (13) and a refrigerant tank (16) are arranged between a condensation pipe (23) of the condensation system and an evaporation pipe (24) of the evaporation system, a refrigerant outlet of the compressor is connected with an inlet of each condensation pipe, and an outlet of each condensation pipe is connected with a refrigerant return opening of the refrigerant tank; the refrigerant inlet of the compressor is connected with the outlet of each evaporation pipe, and the inlet of each evaporation pipe is connected with the refrigerant outlet of the refrigerant tank.

7. The paint slag low-temperature continuous drying device according to claim 4, wherein an air inlet of a first-stage heating box of the condensation system is connected with an air outlet of a last-stage condensation box of the evaporation system through an air pump (18).

8. The paint slag low-temperature continuous drying device according to claim 1, wherein a filter screen (3) is arranged in the air return opening (22).

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