Steel mill cold rolling oil sludge collection and quantitative dilution recycling system

Abstract

The utility model relates to the technical field of steel mill cold rolling oil sludge purification treatment, in particular to a steel mill cold rolling oil sludge collecting, quantitative diluting and recycling system. Comprising an emulsion tank, a magnetic separator, a collecting tank, an S-shaped heating pipe, a collecting barrel and a centrifugal purification module, according to the steel mill cold rolling oil sludge collecting, diluting and recycling system, the S-shaped heating pipe is installed in the collecting tank, the collecting tank and the S-shaped heating pipe work in a matched mode, the viscosity of an oil product is reduced through heating, friction resistance of the oil product during conveying in a pipeline is reduced, and the oil product flows more smoothly; the emulsion and the rolling oil after the oil sludge is separated can return to the emulsion pool to be recycled, and the technology is simple to operate and conforms to the principle of reduction, harmlessness and recycling.

Description

Technical Field

[0001] The utility model relates to the technical field of steel mill cold rolling sludge purification treatment, in particular to a steel mill cold rolling sludge collection and quantitative dilution recycling system. Background Art

[0002] Cold rolling sludge in steel mills is a solid-liquid mixture that cannot be treated by the enterprise's sewage treatment plant. It is generally treated by outsourcing, which is costly. The sludge contains more than 50% rolling oil, which means that each line needs to add new oil every day. The purchase cost of each barrel of oil is high, which increases costs. In order to recycle the rolling oil in the sludge, it needs to be diluted and separated by a centrifuge for solid-liquid separation to recycle the rolling oil. However, the amount of sludge separated by the magnetic pump is uneven. In order to ensure the cleanliness of the recycled rolling oil, a standard separation process needs to be formulated, which requires quantitative dilution, and insulation to prevent deterioration, and then transfer to a set container for separation and purification.

[0003] my country produces tens of millions of tons of oily sludge every year, which has not been properly disposed of and effectively recycled so far. Dumping, burning, or refining by traditional methods, this disorderly and uncontrolled situation has led to serious environmental pollution on the one hand, and a huge waste of resources on the other. In the prior art, two single-stand rolling mills are used. During the rolling and cleaning process of cold-rolled strip steel, a large amount of emulsion is consumed, and a large amount of iron-containing sludge is produced. The sludge is in the form of black slurry with obvious fluidity, which brings great difficulties to loading and transportation. The sludge is composed of water, oil, iron powder, and the rest are solids such as dust. It contains a large amount of organic matter with high recovery value. At the same time, the grease in the cold rolling section is mostly mineralized rolling oil, which has poor biodegradability, is difficult to handle, and has great environmental toxicity. Utility Model Content

[0004] In view of the problems in the prior art that it is difficult to separate cold-rolled sludge in steel mills and the small output of cold-rolled sludge from a single stand in a steel mill that is difficult to collect and utilize in a unified manner, the utility model provides a system for collecting and quantitatively diluting and recycling cold-rolled sludge in steel mills, which solves the problem of difficulty in separating cold-rolled sludge in steel mills and realizes the recovery and recycling of cold-rolled sludge.

[0005] A steel mill cold rolling sludge collection and quantitative dilution recycling system, comprising an emulsion tank, a magnetic separator, a collection tank, an S-shaped heating tube, a collection barrel and a centrifugal purification module;

[0006] The magnetic separator is located in the emulsion tank, the discharge end of the magnetic separator is connected to the feed end of the collection tank through pipeline one, the discharge end at the bottom of the collection tank is connected to the feed end at the top of the collection barrel through pipeline two, an S-shaped heating pipe is installed in the collection tank, the S-shaped heating pipe is connected to the circulating hot water outside the collection tank, the collection barrel is connected to the emulsion tank through the emulsion pipeline, and the discharge end of the collection barrel is connected to the centrifugal purification module through a pipeline;

[0007] Pipeline 2 is equipped with screw pump 1, manual ball valve 3, and electric ball valve 2; the emulsion pipeline is equipped with manual ball valve 1, pneumatic diaphragm pump, manual ball valve 2, and electric ball valve 1.

[0008] Furthermore, the collecting bucket is provided with a liquid level meter.

[0009] Furthermore, the collecting barrel is provided with a stirrer.

[0010] Furthermore, the centrifugal purification module includes a purification barrel and a centrifuge, and the discharge end of the collection barrel is connected to the purification barrel through a pipeline.

[0011] Furthermore, a second screw pump is provided in the pipeline connecting the bottom end of the collecting barrel and the centrifugal purification module.

[0012] Furthermore, the purification barrel is provided with a stirrer.

[0013] The beneficial effects of the utility model are:

[0014] (1) The utility model provides a steel mill cold rolling sludge collection and quantitative dilution recycling system, which solves the problem of difficult separation of rolling sludge and enables the emulsion and rolling oil after the sludge is separated to be returned to the emulsion pool for recycling.

[0015] (2) The utility model installs an S-shaped heating tube in the collection tank. The collection tank and the S-shaped heating tube work together to reduce the viscosity of the oil by heating, thereby reducing the friction resistance of the oil when it is transported in the pipeline, making the flow of the oil smoother.

[0016] (3) The utility model provides a quantitatively diluted sludge which enters the purification barrel of the centrifugal purification module through screw pump 2. The purification barrel is connected to two pipelines. One end of the utility model separates the sludge through a centrifuge, and the separated liquid returns to the purification barrel. The other end of the utility model returns the emulsion and rolling oil after the sludge is separated to the emulsion tank through circulation pipeline 2 for recycling, thus realizing the principle of recycling and reusing cold rolling sludge as a resource.

[0017] (4) The utility model solves the problem that the output of rolling sludge from a single cold rolling stand in a steel plant is small and difficult to collect and utilize in a unified manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic structural diagram of a specific implementation method of the utility model.

[0020] In the figure: 1-emulsion tank, 2-magnetic separator, 3-collecting tank, 4-S-shaped heating tube, 5-collecting barrel, 6-centrifugal purification module, 7-pipeline one, 8-pipeline two, 9-emulsion pipeline, 10-screw pump one, 11-manual ball valve three, 12-electric ball valve two, 13-liquid level gauge, 14-agitator, 15-manual ball valve one, 16-pneumatic diaphragm pump, 17-manual ball valve two, 18-electric ball valve one, 19-screw pump two, 20-purification barrel, 21-centrifuge, 22-circulation pipeline one, 23-circulation pipeline two. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0022] Example 1

[0023] like Figure 1 The utility model provides a steel mill cold rolling sludge collection and quantitative dilution recycling system, including an emulsion tank 1, a magnetic separator 2, a collection tank 3, an S-shaped heating tube 4, a collection barrel 5, and a centrifugal purification module 6;

[0024] The magnetic separator 2 is located in the emulsion tank 1. The discharge end of the magnetic separator 2 is connected to the feed end of the collection tank 3 through a pipeline 7. The discharge end at the bottom of the collection tank 3 is connected to the feed end at the top of the collection barrel 5 through a pipeline 8. An S-shaped heating tube 4 is installed inside the collection tank 3. The S-shaped heating tube 4 is connected to the circulating hot water outside the collection tank 3. The S-shaped heating tube 4 is heated to reduce the viscosity of the oil, reduce the friction resistance of the oil when it is transported in the pipeline, and make the flow of the oil smoother. By heating, the oil is promoted. The moisture and impurities in the product are settled to improve the quality of the oil product; the collecting barrel 5 is connected to the emulsion tank 1 through the emulsion pipeline 9, the centrifugal purification module 6 includes a purification barrel 20 and a centrifuge 21, the discharging end of the collecting barrel 5 is connected to the purification barrel 20, the centrifuge 21 extracts liquid from the purification barrel 20 through the circulation pipeline 1 22, and performs solid-liquid separation on the sludge. The separated liquid is returned to the purification barrel 20, and the emulsion and rolling oil after the sludge is separated are returned to the emulsion tank 1 through the circulation pipeline 2 23 for recycling.

[0025] Pipeline 2 8 is provided with a screw pump 10, a manual ball valve 3 11, and an electric ball valve 2 12; the emulsion pipeline 9 is provided with a manual ball valve 15, a pneumatic diaphragm pump 16, a manual ball valve 2 17, and an electric ball valve 18; the collecting barrel 5 is provided with a liquid level meter 13 and an agitator 14; a screw pump 2 19 is provided in the pipeline connecting the bottom end of the collecting barrel 5 and the purification barrel 20.

[0026] The specific working process of the utility model is as follows:

[0027] The magnetic separator 2 removes ferromagnetic impurities in the sludge during the sludge treatment, and the removed sludge enters the collecting tank 3 through the pipeline 1 7. The collecting tank 3 is installed with an S-shaped heating tube 4, which is connected to the circulating hot water outside the collecting tank 3. The sludge is heated by the S-shaped heating tube 4 to reduce the viscosity of the oil product, reduce the friction resistance of the oil product when it is transported in the pipeline, and make the oil product flow more smoothly from the collecting tank 3 to the pipeline 2 8; the pneumatic diaphragm pump 16 and the electric ball valve 18 are opened in the emulsion pipeline 9, and the emulsion in the emulsion tank 1 is injected into the collecting barrel 5 by two volumes through the pneumatic diaphragm pump 16, and the signal of the liquid level meter 13 is fed back to the controller. After reaching the liquid level, the controller controls the pneumatic diaphragm pump 16 to stop working. At the same time, the electric ball valve 18 is closed. At this time, the agitator 14 in the collecting barrel 5 starts to work, and then the electric ball valve 2 12 is opened. The screw pump 10 transports the sludge in the collecting tank 3 to the collecting barrel 5, and injects a volume of sludge into the collecting barrel 5. Through the signal feedback of the liquid level meter 13, the controller controls the closing of the electric ball valve 2 12, and the screw pump 2 19 is opened to transport the quantitatively diluted sludge to the purification barrel 20 of the centrifugal purification module 6. The purification barrel 20 is equipped with an agitator. The centrifuge 21 draws liquid from the purification barrel 20 through the circulation pipeline 1 22 to separate the solid and liquid of the sludge. The separated liquid is returned to the purification barrel 20, and the emulsion and rolling oil after the sludge is separated are returned to the emulsion tank 1 through the circulation pipeline 2 23 for recycling.

[0028] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field may easily think of changes or substitutions within the technical scope disclosed in the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. A steel mill cold rolling sludge collection and quantitative dilution recycling system, characterized in that: It includes an emulsion tank, a magnetic separator, a collection tank, an S-shaped heating tube, a collection barrel and a centrifugal purification module; The magnetic separator is located in the emulsion tank, the discharge end of the magnetic separator is connected to the feed end of the collection tank through pipeline one, the discharge end at the bottom of the collection tank is connected to the feed end at the top of the collection barrel through pipeline two, an S-shaped heating pipe is installed in the collection tank, the S-shaped heating pipe is connected to the circulating hot water outside the collection tank, the collection barrel is connected to the emulsion tank through the emulsion pipeline, and the discharge end of the collection barrel is connected to the centrifugal purification module through a pipeline; Pipeline 2 is equipped with screw pump 1, manual ball valve 3, and electric ball valve 2; the emulsion pipeline is equipped with manual ball valve 1, pneumatic diaphragm pump, manual ball valve 2, and electric ball valve 1.

2. A steel mill cold rolling sludge collection and quantitative dilution recycling system as claimed in claim 1, characterized in that: The collecting bucket is provided with a liquid level gauge.

3. A steel mill cold rolling sludge collection and quantitative dilution recycling system as claimed in claim 1, characterized in that: The collecting bucket is provided with an agitator.

4. A steel mill cold rolling sludge collection and quantitative dilution recycling system as claimed in claim 1, characterized in that: The centrifugal purification module includes a purification barrel and a centrifuge, and the discharge end of the collection barrel is connected to the purification barrel through a pipeline.

5. A steel mill cold rolling sludge collection and quantitative dilution recycling system as claimed in claim 1, characterized in that: A screw pump 2 is arranged in the pipeline connecting the bottom end of the collecting barrel and the centrifugal purification module.

6. A steel mill cold rolling sludge collection and quantitative dilution recycling system as claimed in claim 4, characterized in that: The purification barrel is provided with a stirrer.

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