Thermal desorption treatment device for oily sludge

Abstract

The utility model discloses an oily sludge thermal desorption treatment device which comprises a pre-crushing filtering structure, the pre-crushing filtering structure is connected to a drying structure, the drying structure is connected to a pyrolysis structure, the pyrolysis structure is connected to a spraying structure, the spraying structure is connected to a collecting structure, the drying structure comprises a drying box, and a heating structure is arranged on the outer side wall of the drying box. Fixing notches are formed in the upper wall and the lower wall of the drying box, a connecting pipeline is arranged between the two fixing notches, the lower end of the connecting pipeline is connected to an air outlet formed in the pyrolysis structure, and the upper end of the connecting pipeline is connected to the spraying structure. According to the sludge drying and pyrolysis device, gas generated by the pyrolysis structure is used for carrying out heat exchange on pretreated sludge, so that sludge drying and pyrolysis gas cooling are realized, and the working efficiency of a subsequent spraying structure is conveniently improved; on the other hand, the inclined part is arranged in the connecting pipeline, so that the contact area is increased, the heat exchange effect is improved, and meanwhile, part of heat exchange condensed oil water is directly recycled and collected at the lower part of the spraying box body.

Description

Technical Field

[0001] The utility model relates to the technical field of oily sludge treatment equipment, in particular to an oily sludge thermal desorption treatment device. Background Art

[0002] Oily sludge refers to sludge mixed with petroleum hydrocarbons such as crude oil, various refined oils, and residual oil, which is a hazardous waste. The most common treatment method is currently incineration, which is to burn the oily sludge in an aerobic state after mixing. Although it is fast and very effective, the oily components are not utilized and the cost is high. In addition, since it will remain in soil residues or be discharged with flue gas, it needs to be pre-treated to remove heavy metals. When chlorinated hydrocarbons are incinerated, incomplete combustion products will be formed. Furthermore, as an improvement to the existing technology, thermal desorption is used for treatment. When conventional thermal desorption is used to treat oily sludge, the sludge is generally pyrolyzed, and the pyrolysis gas is sprayed to separate the oil-water mixture and non-condensable gas. However, the equipment in the above structure is generally arranged separately, the energy recovery efficiency is low, and there is a problem of resource waste. Utility Model Content

[0003] The purpose of the utility model is to provide a treatment device for effectively utilizing energy in the process of thermal desorption treatment of oily sludge in view of the deficiencies existing in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides an oily sludge thermal desorption treatment device, which adopts the following technical scheme:

[0005] A thermal desorption treatment device for oily sludge comprises a pre-crushing and filtering structure, the pre-crushing and filtering structure is connected to a drying structure, the drying structure is connected to a pyrolysis structure, the pyrolysis structure is connected to a spray structure, and the spray structure is connected to a collection structure. The invention is characterized in that: the drying structure comprises a drying box, a heating structure is provided on the outer wall of the drying box, fixed notches are provided on the upper and lower walls of the drying box, a connecting pipe is provided between the two fixed notches, the lower end of the connecting pipe is connected to an air outlet arranged on the pyrolysis structure, and the upper end of the connecting pipe is connected to the spray structure.

[0006] A further improvement of the oily sludge thermal desorption treatment device of the utility model is that the connecting pipeline comprises a bending portion which is arranged obliquely upward.

[0007] A further improvement of the oily sludge thermal desorption treatment device of the utility model is that a fixed pipe is provided below the connecting pipe, the fixed pipe is arranged obliquely, a control valve is provided at the lower end of the fixed pipe, the connecting pipe is connected to the side of the fixed pipe close to the lower end, and the upper end of the fixed pipe is connected to the gas outlet of the pyrolysis structure.

[0008] The further improvement of the oily sludge thermal desorption treatment device of the utility model is that the spray structure includes a spray box, the upper end of the connecting pipe is connected to the spray box, and a spray structure is also provided in the spray box, and the lower end of the fixed pipe is connected to the spray box.

[0009] A further improvement of the oily sludge thermal desorption treatment device of the utility model is that the outlet at the upper end of the spray structure is connected to the combustion chamber, and the gas outlet at the upper end of the combustion chamber is connected to the pyrolysis structure.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model utilizes the gas generated by the pyrolysis structure to perform heat exchange on the pretreated sludge to achieve sludge drying and cooling of the pyrolysis gas, which is convenient for improving the working efficiency of the subsequent spraying structure; on the other hand, an inclined portion is arranged inside the connecting pipe to increase the contact area and improve the heat exchange effect. At the same time, part of the oil and water condensed by the heat exchange is directly recovered and collected at the bottom of the spray box. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] In the figure: 1 drying box, 2 heating structure, 3 connecting pipe, 4 fixed pipe, 5 pyrolysis structure, 6 spray structure, 7 collecting structure, 8 combustion chamber. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] like Figure 1 As shown, a thermal desorption treatment device for oily sludge includes a pre-crushing and filtering structure (not shown in the figure), the pre-crushing and filtering structure is connected to the drying structure, the drying structure is connected to the pyrolysis structure 5, the pyrolysis structure is connected to the spray structure 6, the spray structure is connected to the collection structure 7, the drying structure includes a drying box 1, a heating structure 2 is provided on the outer wall of the drying box, fixed notches are provided on the upper wall and the lower wall of the drying box, a connecting pipe 3 is provided between the two fixed notches, the lower end of the connecting pipe is connected to the air outlet arranged on the pyrolysis structure, and the upper end of the connecting pipe is connected to the spray structure. The connecting pipe includes a bending portion arranged obliquely upward. It is used to increase the contact area and improve the heat exchange effect.

[0016] Furthermore, a fixed pipe 4 is provided below the connecting pipe, the fixed pipe is arranged obliquely, a control valve is provided at the lower end of the fixed pipe, the connecting pipe is connected to the side of the fixed pipe close to the lower end, and the upper end of the fixed pipe is connected to the gas outlet of the pyrolysis structure. The oil-water mixture condensed after part of the heat exchange is collected; at the same time, the pyrolysis gas enters the fixed pipe from top to bottom, which also makes it easy to place the oil-water mixture in the fixed pipe near the lower end.

[0017] The spray structure includes a spray box, the upper end of the connecting pipe is connected to the spray box, and a spray structure is also provided in the spray box, and the lower end of the fixed pipe is connected to the spray box. The condensable gas in the pyrolysis gas is sprayed to obtain an oil-water mixture, which is then placed in the collection structure for subsequent operations such as phase separation.

[0018] The upper outlet of the spray structure is connected to the combustion chamber 8, and the upper air outlet of the combustion chamber is connected to the pyrolysis structure; on the other hand, it can also be connected to the heating structure.

[0019] The working principle of the utility model is as follows: the oily sludge is crushed and filtered and then placed in a drying structure, and then dried before entering a pyrolysis furnace for pyrolysis, the pyrolysis gas passes through the drying structure for heat exchange and then enters a spray structure to separate the oil-water mixture and the non-condensable gas, and the non-condensable gas enters a combustion chamber for combustion and impurity removal, and the obtained gas is used as the heating gas of the pyrolysis furnace or the heating gas of the drying box.

[0020] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A thermal desorption treatment device for oily sludge, comprising a pre-crushing and filtering structure, the pre-crushing and filtering structure is connected to a drying structure, the drying structure is connected to a pyrolysis structure, the pyrolysis structure is connected to a spraying structure, the spraying structure is connected to a collecting structure, characterized in that: The drying structure comprises a drying box, a heating structure is provided on the outer wall of the drying box, fixed notches are provided on the upper wall and the lower wall of the drying box, a connecting pipe is provided between the two fixed notches, the lower end of the connecting pipe is connected to the air outlet arranged on the pyrolysis structure, and the upper end of the connecting pipe is connected to the spray structure.

2. The oily sludge thermal desorption treatment device according to claim 1, characterized in that: The connecting pipe comprises a bending portion which is arranged obliquely upward.

3. The oily sludge thermal desorption treatment device according to claim 2, characterized in that: A fixed pipe is arranged below the connecting pipe, the fixed pipe is arranged obliquely, a control valve is arranged at the lower end of the fixed pipe, the connecting pipe is connected to the side of the fixed pipe close to the lower end, and the upper end of the fixed pipe is connected to the gas outlet of the pyrolysis structure.

4. The oily sludge thermal desorption treatment device according to claim 3 is characterized in that: The spray structure comprises a spray box, the upper end of the connecting pipe is connected to the spray box, the spray box is further provided with a spray structure, and the lower end of the fixed pipe is connected to the spray box.

5. The oily sludge thermal desorption treatment device according to claim 4, characterized in that: The outlet at the upper end of the spray structure is connected to the combustion chamber, and the gas outlet at the upper end of the combustion chamber is connected to the pyrolysis structure.

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