CN209969183U

CN209969183U - Paint waste residue organic solvent recovery plant

Info

Publication number: CN209969183U
Application number: CN201920681082.9U
Authority: CN
Inventors: 陈莹钧; 任正伟; 伍建军; 赵文良; 曾鲁燕; 柳旭惠
Original assignee: Jinhua Mengyuan Environment Science And Technology Co Ltd
Current assignee: Jinhua Mengyuan Environment Science And Technology Co Ltd
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-01-21
Anticipated expiration: 2029-05-14

Abstract

The utility model provides a paint waste residue organic solvent recovery device, which comprises an oil storage tank, a drying box, a condenser and a liquid storage tank, wherein the drying box is internally provided with a containing cavity for placing paint waste residue and an oil guide pipe arranged at the periphery of the containing cavity; the air outlet of the drying box is connected with the air inlet of the condenser, and the air outlet of the condenser is connected with the liquid storage tank. The utility model discloses an external oil tank, in storing the conduction oil in the oil tank and circulating into the oil pipe, the heating holds the interior paint waste residue of chamber, heats the evaporation with the organic solvent in the paint waste residue, and vapor and partial gaseous state solvent that the in-process that heats the evaporation produced get into the condenser, and the moisture content is higher in the solution of retrieving after the cooling, and organic solvent floats on the surface of water, easily with the separation of water, waste water emits into industrial waste water treatment facility.

Description

Paint waste residue organic solvent recovery plant

Technical Field

The utility model relates to a paint technical field relates to the recovery of paint waste residue and reapplies, especially relates to a paint waste residue organic solvent recovery plant.

Background

The source of organic waste gas generated during painting of workpieces on a painting line is volatile organic solvents in paint, such as toluene, xylene, ethyl acetate and the like, and the content of the organic waste gas in the paint is generally about 50%. Paint waste residues are inevitably generated in the organic waste gas treatment process of the coating line, and the solid content of the waste residues is 70%, the organic solvent is 20% and the water content is 10%.

Paint waste belongs to the hazardous waste strictly controlled by environmental protection departments, enterprises must transport the hazardous waste to a specified unit for centralized treatment according to requirements, and pay the disposal cost of the hazardous waste, for example, in Zhejiang province, the average disposal cost of the hazardous waste is 4000 yuan/ton.

At present, environmental protection departments in various regions pay great attention to paint waste residue treatment, but do not pay attention to the problem of air pollution caused by continuous volatilization of organic solvents in the short period of several weeks and several months for incineration treatment of waste residue.

The Chinese patent with application number 201510508890.1 discloses a method for recycling paint waste residues, which comprises the following steps: s1, drying and crushing the collected paint waste residues to obtain a waste paint residue filler; and S2, adding the waste paint slag filler into the conventional preparation process of the anticorrosive paint or the antirust paint according to the conventional addition amount of the filler to obtain the anticorrosive paint or the antirust paint. In paragraph [ 0010 ] of the detailed description, there is disclosed: the collected paint sludge is dried in order to drive off the water content of the paint sludge, preferably completely, at least to a water content of not more than 1% by mass. However, there is no disclosure in this patent of how the organic solvent in the paint sludge is recovered.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a paint waste residue organic solvent recovery plant to overcome prior art's above-mentioned defect.

In order to achieve the purpose, the utility model provides a paint waste residue organic solvent recovery equipment, including oil storage tank, drying cabinet, condenser and liquid storage tank, be equipped with the appearance chamber that is used for placing the paint waste residue and establish in the oil pipe that leads of appearance chamber periphery in the drying cabinet, the oil storage tank embeds there is conduction oil, the oil-out of oil storage tank is connected with lead oil pipe's oil inlet through first oil pipe, the oil inlet of oil storage tank is connected with lead oil pipe's oil-out through second oil pipe; the air outlet of the drying box is connected with the air inlet of the condenser, and the air outlet of the condenser is connected with the liquid storage tank.

Preferably, the paint drying box further comprises a crushing device for crushing the paint waste residue in the drying box.

Preferably, a circulating pump is arranged on the second oil pipe.

Preferably, the first oil pipe is communicated with the second oil pipe through a third oil pipe, and a first control valve is arranged on the third oil pipe.

Preferably, the cooling water line of the condenser is connected to a cooling tower.

As above, the utility model relates to a paint waste residue organic solvent recovery plant has following beneficial effect: the utility model discloses an external oil tank, in storing the conduction oil in the oil tank and circulating into the oil pipe, the heating holds the interior paint waste residue of chamber, heats the evaporation with the organic solvent in the paint waste residue, and vapor and partial gaseous state solvent that the in-process that heats the evaporation produced get into the condenser, and the moisture content is higher in the solution of retrieving after the cooling, and organic solvent floats on the surface of water, easily with the separation of water, waste water emits into industrial waste water treatment facility.

Drawings

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

Description of the element reference numerals

1	Oil storage tank
		11	First oil pipe
111	Second control valve
		12	Second oil pipe
121	Circulating pump
		122	Flow meter
123	Third control valve
		13	Third oil pipe
131	First control valve
		2	Drying cabinet
21	Containing chamber
		22	Air outlet pipe
221	Fourth control valve
		3	Condenser
31	Cooling tower
		4	Liquid storage tank

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

As shown in fig. 1, the utility model provides a paint waste residue organic solvent recovery plant, including oil storage tank 1, drying cabinet 2, condenser 3 and storage liquid tank 4, be equipped with the appearance chamber 21 that is used for placing the paint waste residue in the drying cabinet 2, the utility model discloses a drying cabinet 2 is for opening the door, puts into the appearance chamber 21 with the paint waste residue, makes the paint waste residue dry, and the vapor and the partial gaseous state solvent that produce heat from the paint waste residue and evaporate, uses electrical heating usually among the prior art, but electrical heating cost is higher, if use the easy explosion of steam heating and the temperature of steam heating can not reach the settlement standard, makes the drying efficiency of paint waste residue lower, so heat conduction oil evaporation is used in the utility model. In an embodiment, the box inlayer of drying cabinet 2 is equipped with leads oil pipe, leads oil pipe and can wind the periphery that holds chamber 21 evenly sets up, makes the paint waste residue that holds in the chamber 21 is heated evenly, 1 built-in conduction oil that has of oil storage tank, the oil-out of oil storage tank 1 through first oil pipe 11 with lead oil pipe's oil inlet and connect, oil storage tank 1's oil inlet pass through second oil pipe 12 with lead oil pipe's oil-out and connect to during the conduction oil of oil storage tank 1 gets into through first oil pipe 11 and leads oil pipe, flow into second oil pipe 12 from the oil-out of leading oil pipe, get into in the oil storage tank 1 at last, thereby accomplish a circulation, the utility model discloses a heating medium uses the conduction oil, and its heating temperature can reach about 300 ℃, can effectively evaporate out the moisture and the organic solvent of oil paint waste residue. The air outlet of the drying box 2 is connected with the air inlet of the condenser 3, the air outlet of the condenser 3 is connected with the liquid storage tank 4, water vapor and part of gaseous solvents generated in the drying process enter the condenser 3, the solution is recovered into the liquid storage tank 4 after being cooled, the water content in the recovered solution is high, the organic solvent floats on the water surface, and after the water and the organic solvent are separated, the wastewater is discharged into an industrial wastewater treatment facility.

Because the lacquer sediment after the stoving is cubic, still has partly organic solvent and moisture to fail to evaporate out in drying cabinet 2 stoving, consequently need carry out shredding to it, the utility model discloses in use crushing apparatus to smash the lacquer sediment after the stoving, the graininess lacquer sediment particle diameter that obtains uses 8 ~ 12mm as suitable, and crushing apparatus can use rubbing crusher, and the lacquer sediment after smashing is put into drying cabinet 2 once more and is dried, heats remaining organic solvent and moisture and evaporates.

Preferably, the second oil pipe 12 is provided with a circulating pump 121, a flowmeter 122 and a third control valve 123, the first oil pipe 11 is provided with a second control valve 111, the first oil pipe 11 is communicated with the second oil pipe 12 through a third oil pipe 13, the third oil pipe 13 is provided with a first control valve 131, the flow of the heat transfer oil is controlled through the first control valve 131, the second control valve 111 and the third control valve 123, and the heat transfer oil can circularly heat the paint waste residues in the cavity 21 through the circulating pump 121. Preferably, the cooling water pipeline of the condenser 3 is connected with the cooling tower 31, the condenser 3 is a shell and tube condenser, the water vapor and the volatile organic solvent in the drying box 2 enter the shell and tube condenser, and the cooling water after heat exchange is processed by the cooling tower 31 and then is recycled in a closed loop.

The process steps implemented by the utility model are as follows: s1, filling the paint waste residues into a material bag, putting the material bag into the cavity 21 of the drying box 2, opening the oil pipe 1, performing first heating evaporation on the paint waste residues by using heat conduction oil, and allowing part of water vapor and the gaseous solvent to enter a condenser 3; s2, opening the drying box 2, taking out the paint waste residue in the drying box 2, crushing the paint waste residue by the crusher, and putting the material into the drying box 2 again; s3, carrying out secondary heating evaporation on the paint waste residues, and enabling most of water vapor and the gaseous solvent to enter a condenser 3; s3, cooling the water vapor and the gaseous solvent by the condenser 3 to form a solution, entering the liquid storage tank 4, and carrying out solvent separation and recovery treatment.

The utility model discloses can carry out removing of paint waste residue and glue before the use, solve the lacquer sediment effectively and remove to glue the problem and will help reducing the energy consumption, improve organic solvent's recovery efficiency, the paint mist coagulant of adopting generally is these two types of organic polyamine type and inorganic bentonite type.

In the process of paint spraying of a coating line, at least 50% of organic solvent is estimated to be deposited in paint slag, and if the utility model is adopted, the good environmental benefit can be obtained while the resources are recycled. If the dangerous waste disposal cost is calculated by taking 4000 yuan/ton as a base number, the weight of the paint slag can be reduced by 30 percent after the paint slag is dried for the second time, namely the dangerous waste disposal cost of 1200 yuan can be reduced for each ton of the paint slag; about 100kg of organic solvent can be recovered from each ton of paint slag, and the organic solvent can be sold as a chemical raw material under the permission of an environmental protection department.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The equipment for recovering the organic solvent from the paint waste residue is characterized by comprising an oil storage tank (1), a drying box (2), a condenser (3) and a liquid storage tank (4), wherein a containing cavity (21) for containing the paint waste residue and an oil guide pipe arranged on the periphery of the containing cavity (21) are arranged in the drying box (2), heat conduction oil is arranged in the oil storage tank (1), an oil outlet of the oil storage tank (1) is connected with an oil inlet of the oil guide pipe through a first oil pipe (11), and an oil inlet of the oil storage tank (1) is connected with an oil outlet of the oil guide pipe through a second oil pipe (12); the air outlet of the drying box (2) is connected with the air inlet of the condenser (3), and the air outlet of the condenser (3) is connected with the liquid storage tank (4).

2. The apparatus for recovering the organic solvent from the paint waste according to claim 1, wherein: the paint drying box also comprises crushing equipment for crushing the paint waste residue in the drying box (2).

3. The apparatus for recovering the organic solvent from the paint waste according to claim 1, wherein: and a circulating pump (121) is arranged on the second oil pipe (12).

4. The apparatus for recovering the organic solvent from the paint waste according to claim 1, wherein: the first oil pipe (11) is communicated with the second oil pipe (12) through a third oil pipe (13), and a first control valve (131) is arranged on the third oil pipe (13).

5. The apparatus for recovering the organic solvent from the paint waste according to claim 1, wherein: and a cooling water pipeline of the condenser (3) is connected with a cooling tower (31).