High-viscosity waste emulsion treatment device for hot rolling mill train

Abstract

The utility model relates to waste liquid treatment device technical field, concretely is a kind of high viscosity waste emulsion treatment device of hot rolling unit, include: raw liquid tank;Evaporator is used to carry out evaporation separation to waste liquid from raw liquid tank;Ceramic membrane filter is used to filter the condensate of steam from evaporator;Unloading tank, for collecting the concentrated solution discharged by evaporator;Still include compressor, heat exchange tank;The steam outlet of evaporator is connected with the inlet of compressor, heat exchange tank is equipped with heat exchange pipe, the outlet of compressor is connected with the inlet of heat exchange tank, and outlet connects ceramic membrane filter;The inlet of heat exchange pipe is connected with raw liquid tank, and outlet is connected with evaporator;The utility model separates water from waste emulsion by setting evaporator, and the remaining waste mineral oil and concentrated solution after separating water are used as dangerous waste outsourcing treatment;After separating water, the amount of dangerous waste is reduced, and the environmental protection risk and the cost of dangerous waste treatment are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of waste liquid treatment devices, specifically a device for treating high-viscosity waste emulsion from a hot rolling mill. Background Technology

[0002] During the hot rolling mill production process, emulsion is sprayed onto the sheet metal for cooling, cleaning, and lubrication. During this cycle, other oil leaks and impurities such as aluminum powder are introduced into the emulsion system, making the emulsion dirty and increasing its ash content. It is necessary to reduce the ash content of the emulsion by filtration, settling and skimming, or partial replacement. The skimmed-off oil cannot be reused and forms waste emulsion. Waste emulsion is treated as hazardous waste, which increases environmental risks and hazardous waste treatment costs. Utility Model Content

[0003] The main purpose of this utility model is to provide a high-viscosity waste emulsion treatment device for hot rolling mills, so as to solve the problem that the waste oil skimmed off during the hot rolling mill production process in the prior art cannot be reused and is treated as hazardous waste, which increases environmental risks and the cost of hazardous waste treatment.

[0004] To achieve the above objectives, this utility model provides a device for treating high-viscosity waste emulsion from a hot rolling mill, comprising: Original solution tank; An evaporator is used to evaporate and separate waste liquid from the feed tank. Ceramic membrane filters are used to filter the condensate from the steam coming from the evaporator; The discharge tank is used to collect the concentrated liquid discharged from the evaporator.

[0005] Furthermore, it also includes a compressor and a heat exchange tank; the compressor inlet is connected to the steam outlet of the evaporator, the heat exchange tank is equipped with heat exchange tubes, the heat exchange tank inlet is connected to the compressor outlet, and the outlet is connected to a ceramic membrane filter; the heat exchange tube inlet is connected to a raw liquid tank, and the outlet is connected to the evaporator; the compressor is used to compress and heat the steam discharged from the evaporator; the high-temperature steam in the heat exchange tank transfers heat to the liquid in the heat exchange tubes, heating the liquid in the heat exchange tubes.

[0006] Furthermore, it also includes a storage tank, which is connected to a bag filter, and the bag filter is connected to a stock solution tank.

[0007] Furthermore, the compressor outlet is connected to a steam buffer tank, which is connected to an evaporator.

[0008] This invention separates water from waste emulsion by using an evaporator. The remaining waste mineral oil and concentrate (black oily viscous substance) after water separation are treated as hazardous waste by an external contractor. Water separation reduces the amount of hazardous waste, thereby reducing environmental risks and treatment costs. By using a ceramic membrane filter, the separated water can be filtered to intercept suspended solids and large molecules, further reducing COD in the wastewater and ultimately achieving compliant discharge. Attached Figure Description

[0009] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0010] Figure 1 This is a schematic diagram of the high-viscosity waste emulsion treatment device for the hot rolling mill in the embodiment. Figure 2 This is a schematic diagram of the evaporator structure in the embodiment; In the diagram: 1. Raw material tank; 2. Evaporator; 201. Heating chamber; 202. Evaporation chamber; 203. Circulation pipe; 204. Heating pipe; 205. Steam chamber; 206. Feed inlet; 207. Steam outlet; 208. Finished liquid outlet; 3. Compressor; 4. Ceramic membrane filter; 5. Discharge tank; 6. Heat exchange tank; 7. Heat exchange pipe; 8. Bag filter; 9. Steam buffer tank; 10. Storage tank; 11. Raw material buffer tank; 12. Condensate drain tank; 13. Raw water tank; 14. Concentrate buffer tank; 15. Concentrate collection tank. Detailed Implementation

[0011] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0012] Example 1 like Figure 1As shown, a high-viscosity waste emulsion treatment device for a hot rolling mill includes a raw liquid tank 1. One end of the raw liquid tank 1 is connected to a heat exchange tube 7 via a pipe, and the heat exchange tube 7 is located inside a heat exchange tank 6. The other end of the heat exchange tube 7 is connected to a raw liquid buffer tank 11 via a pipe. The raw liquid buffer tank 11 is connected to the feed inlet of an evaporator 2 via a pipe. The evaporator 2 is used to compress and heat the waste liquid from the raw liquid tank 1. The steam outlet of the evaporator 2 is connected to the inlet of a compressor 3 via a pipe. The compressor 3 is used to compress and heat the steam discharged from the evaporator 2. The outlet of the compressor 3 is connected to a condensate discharge tank 12 via a pipe. The condensate discharge tank 12 is connected to the heat exchange tank 6 via a pipe. The heat exchange tank 6 is connected to a raw water tank 13 via a pipe. The raw water tank 13 is connected to a ceramic membrane filter 4 via a pipe. The ceramic membrane filter 4 is used to filter the condensate from the compressor 3.

[0013] The compressor 3 is used to compress and heat the steam discharged from the evaporator 2; the high-temperature steam in the heat exchange tank 6 transfers heat to the liquid in the heat exchange tube 7, heating the liquid in the heat exchange tube 7; the liquid is preheated to increase the heating rate of the liquid, so that the liquid can be heated quickly after entering the evaporator 2.

[0014] The outlet of the finished liquid of the evaporator 2 is connected to the unloading tank 5 through a pipeline. The unloading tank 5 is used to collect the concentrated liquid discharged from the evaporator 2. The unloading tank 5 is connected to the concentrated liquid buffer tank 14 through a pipeline. The concentrated liquid buffer tank 14 is connected to the concentrated liquid collection tank 15 through a pipeline.

[0015] Example 2 Example 2 also provides a high-viscosity waste emulsion treatment device for hot rolling mills, which differs from the high-viscosity waste emulsion treatment device for hot rolling mills in Example 1 only in that: like Figure 2 As shown, the evaporator 2 is an external heating evaporator; the evaporator 2 includes a heating chamber 201 and an evaporation chamber 202, which are connected by a circulation pipe 203; the heating chamber 201 is provided with a plurality of heating tubes 204 and a steam chamber 205 for heating the heating tubes 204, and a feed liquid inlet 206 is provided on the heating chamber 201; the evaporation chamber 202 is provided with a steam outlet 207 and a finished liquid outlet 208.

[0016] Example 3 Example 3 also provides a high-viscosity waste emulsion treatment device for hot rolling mills, which differs from the high-viscosity waste emulsion treatment device for hot rolling mills in Example 2 only in that: It also includes a storage tank 10, which is connected to a bag filter 8, and the bag filter 8 is connected to a raw material tank 1; the bag filter 8 is a coarse filter used to filter impurities and aluminum shavings in the waste emulsion.

[0017] Example 4 Example 4 also provides a high-viscosity waste emulsion treatment device for hot rolling mills, which differs from the high-viscosity waste emulsion treatment device for hot rolling mills in Example 3 only in that: The outlet of compressor 3 is connected to a steam buffer tank 9, which is connected to an evaporator 2. Part of the steam after being compressed and heated by compressor 3 is fed into the heating chamber of evaporator 2.

[0018] The above embodiment separates water from the waste emulsion by setting up an evaporator. The remaining waste mineral oil and concentrate (black oily viscous substance) after water separation are treated as hazardous waste by an external contractor. Water separation reduces the amount of hazardous waste, thereby reducing environmental risks and the cost of hazardous waste treatment. By setting up a ceramic membrane filter, the separated water can be filtered to intercept suspended solids and large molecules in the water, further reducing the COD in the wastewater and ultimately achieving the discharge standard.

[0019] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for treating high-viscosity waste emulsion from a hot rolling mill, characterized in that, include: Original liquid tank (1); Evaporator (2) is used to evaporate and separate waste liquid from raw liquid tank (1); A ceramic membrane filter (4) is used to filter the condensate from the steam coming from the evaporator (2); The unloading tank (5) is used to collect the concentrated liquid discharged from the evaporator (2).

2. The high-viscosity waste emulsion treatment device for hot rolling mills as described in claim 1, characterized in that, It also includes a compressor (3) and a heat exchange tank (6); the inlet of the compressor (3) is connected to the steam outlet of the evaporator (2), the heat exchange tank (6) is provided with a heat exchange tube (7), the inlet of the heat exchange tank (6) is connected to the outlet of the compressor (3), and the outlet is connected to a ceramic membrane filter (4); the inlet of the heat exchange tube (7) is connected to a raw liquid tank (1), and the outlet is connected to the evaporator (2).

3. The hot rolling mill high-viscosity waste emulsion treatment device as described in claim 1, characterized in that, It also includes a storage tank (10) connected to a bag filter (8) connected to a raw material tank (1).

4. The high-viscosity waste emulsion treatment device for hot rolling mills as described in claim 2, characterized in that, The outlet of the compressor (3) is connected to a steam buffer tank (9), and the steam buffer tank (9) is connected to an evaporator (2).

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