Oil-containing flue gas treatment device for cold rolling

Abstract

The oil-containing flue gas treatment device comprises a treatment cylinder and an air extracting pump, the air extracting pump is installed on one side of the treatment cylinder, the air inlet end of the air extracting pump is connected with a top opening of the treatment cylinder in a penetrating mode through an air extracting pipe, a partition plate is fixedly installed in the treatment cylinder, and the surface of the partition plate is connected with an air cylinder in a penetrating mode. An alkali liquor spraying pipe is inserted in the position, located below the partition plate, of the surface of one side of the treatment barrel in a penetrating mode, and an acid liquor spraying pipe is inserted in the position, located above the air cylinder, of the surface of one side of the treatment barrel in a penetrating mode; and the surfaces of the acid liquor spray pipe and the alkali liquor spray pipe are communicated and connected with atomizing nozzles. The oil-containing flue gas treatment device has the advantages that the treatment barrel is adopted, continuous treatment of oil-containing flue gas for cold rolling is completed through spraying of alkali liquor and acid liquor, the trouble of frequently replacing the alkali liquor and the acid liquor is omitted, the treatment process is more continuous and reliable, and use convenience and working efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the clean production technical field, specifically, relate to oil -laden flue gas treatment device for cold rolling. BACKGROUND

[0002] The oil mist amount produced in the production rolling process of the cold rolled strip is large and high in concentration, and the environmental pollution caused by it can seriously affect the health of the operators, therefore, the oil mist must be treated efficiently to reach the emission standard, and the emulsion must be sprayed to the roll and the rolling gap during the rolling process of the cold rolled strip to ensure the quality of the strip, while the emulsion cools the roll and the rolled piece, the temperature of the emulsion itself rises rapidly, and the following three types of oil mist can be produced: 1. atomized emulsion produced by the impact of the emulsion, the particle range is 20-30um, and accounts for more than 96% of the oil mist amount, and does not contain solid dust; 2. a part of the oil film attached to the surface of the strip will be atomized under the heating of the strip residual temperature 100 DEG C, and the particle diameter is less than 10um; 3. the temperature of the circulating emulsion is controlled at 50-55 DEG C, and a small amount of aerosol gas can also be produced when it is sprayed to the rolling mill, and the particle range is 0.01-5um, and accounts for a very small part of the total amount of oil mist.

[0003] After searching, it is found that the publication number is CN213556193U, and the name is cold rolling mill flue gas treatment device, which puts forward the problem that the flue gas treatment device needs to be set in the cold rolling process to treat the flue gas, by connecting the oil mist separator and the waste oil pool on the gas collecting hood, the oil mist produced in the cold rolling process of the cold rolling mill can be treated, and the cleanliness of the discharged gas is increased, but in the actual use process, the application adopts the way of ventilation pickling and ventilation water washing to treat the oil-containing flue gas, the acid and alkali liquid are in the saturated state after working for a period of time, and the workers need to replace them, but the replacement process cannot treat the flue gas, which affects the continuity and efficiency of the work, at the same time, the first adsorption layer and the second adsorption layer also need to be cleaned frequently, which is more troublesome, and further improvement can be made.

[0004] For the problems in the related art, no effective solution has been proposed so far. UTILITY MODEL CONTENTS

[0005] (I) technical problems solved

[0006] In view of the shortcomings of the prior art, the utility model provides an oil-containing flue gas treatment device for cold rolling, which has the advantages of convenient use, continuous work and high efficiency, and solves the problems in the above background technology.

[0007] (II) technical scheme

[0008] In order to realize the above-mentioned advantages of convenient use, continuous work and high efficiency, the utility model adopts the following specific technical scheme:

[0009] The oil-containing flue gas treatment device for cold rolling comprises a treatment cylinder and an air extraction pump, one side of the treatment cylinder is provided with the air extraction pump, the air inlet end of the air extraction pump is connected with the top opening of the treatment cylinder through an air extraction pipe, a partition plate is fixedly installed in the treatment cylinder, air cylinders are connected through the surface of the partition plate, downcomers are connected through the outer side of the air cylinders and located on the surface of the partition plate, the downcomers extend to the bottom of the treatment cylinder, lye spray pipes are inserted through and connected with the surface of one side of the treatment cylinder below the partition plate, acid liquid spray pipes are inserted through and connected with the surface of one side of the treatment cylinder above the air cylinders, atomizing nozzles are connected through the surfaces of the acid liquid spray pipes and the lye spray pipes, liquid level switches are fixedly installed at the bottom of the treatment cylinder, an air inlet pipe is connected through the surface of one side of the bottom of the treatment cylinder, a bottom pipe is connected through the bottom surface of the treatment cylinder, a self-cleaning filter is connected through the bottom opening of the bottom pipe, an oil-water separator is installed on the other side of the treatment cylinder, the liquid inlet end of the oil-water separator is connected with the liquid outlet pipe of the self-cleaning filter through a connecting pipe, and electromagnetic valves are installed on the surface of the bottom pipe and electrically connected with the output end of the liquid level switches.

[0010] Further, a top cover is fixedly installed above the air cylinders through a support, and the top cover is in an umbrella shape.

[0011] Further, a plurality of air cylinders are uniformly arranged.

[0012] Further, the acid liquid spray pipes are connected with acid liquid pumping equipment.

[0013] Further, the lye spray pipes are connected with lye pumping equipment.

[0014] Further, a demister is fixedly installed at the top of the treatment cylinder.

[0015] Further, supporting legs are fixedly installed at the bottom of the treatment cylinder.

[0016] Further, the top of the treatment cylinder is in a horn shape.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the oil-containing flue gas treatment device for cold rolling has the following beneficial effects:

[0019] (1) This utility model employs a treatment cylinder. When treating the oily fumes from cold rolling, the air pump is started to extract the air from inside the treatment cylinder, thus creating a negative pressure state inside the treatment cylinder. The oily fumes from cold rolling are drawn into the treatment cylinder through the air inlet pipe. The alkali spray pipe is connected to the alkali pumping equipment, and the alkali is sprayed out through the atomizing nozzle, combining with the oily fumes from cold rolling to remove acidic substances and capture particulate matter and oil from the oily fumes, causing them to fall to the bottom of the treatment cylinder. The oily fumes from cold rolling that have undergone alkali washing pass through the air cylinder and enter the area above the partition. The acid spray pipe is connected to the acid pumping equipment, and the acid... After being sprayed through the atomizing nozzle, the alkaline substances in the oily fumes from cold rolling are removed. The acid solution enters the bottom of the treatment cylinder through the drain pipe. After purification, the gas is discharged through the exhaust pipe. When the liquid level reaches the set value, the liquid level switch opens the solenoid valve. After the wastewater and oil are filtered through the self-cleaning filter to remove impurities, solid particles are filtered out. The alkaline solution, acid solution, and oil enter the oil-water separator, where the oil is separated out, completing the treatment of the oily fumes from cold rolling. This device achieves continuous treatment of oily fumes from cold rolling through the spraying of alkaline and acid solutions, eliminating the trouble of frequently changing alkaline and acid solutions. The treatment process is more continuous and reliable, improving the convenience of use and work efficiency.

[0020] (2) This utility model adopts a self-cleaning filter. The alkaline solution and acid solution produce a neutralization reaction at the bottom of the treatment cylinder, which reduces the corrosiveness to subsequent equipment, protects the oil-water separator and the self-cleaning filter. The self-cleaning filter can automatically complete the cleaning, saving the trouble of frequent manual cleaning, and further improving the convenience of use and work efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the external structure of the oily flue gas treatment device for cold rolling proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the air cylinder proposed in this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the acid spray nozzle proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the oily flue gas treatment device for cold rolling proposed in this utility model.

[0026] In the picture:

[0027] 1, processing cylinder; 2, air inlet pipe; 3, mist eliminator; 4, lye spray pipe; 5, acid liquid spray pipe; 6, atomizing nozzle; 7, partition; 8, air cylinder; 9, top cover; 10, downpipe; 11, bottom pipe; 12, self-cleaning filter; 13, electromagnetic valve; 14, liquid level switch; 15, air extraction pipe; 16, air extraction pump; 17, connecting pipe; 18, oil-water separator; 19, support. DETAILED DESCRIPTION

[0028] To further illustrate the embodiments, the utility model provides with the drawings, these drawings are the part of the utility model disclosure, it mainly used to explain the embodiment, and can cooperate with the relevant description of the specification to explain the operation principle of the embodiment, cooperate with reference to these contents, the person skilled in the art should be able to understand other possible implementation ways and the advantages of the utility model, the components in the drawing are not drawn according to scale, and similar component symbols are usually used to indicate similar components.

[0029] According to the embodiment of the utility model, oil-containing flue gas treatment device for cold rolling is provided.

[0030] The utility model will be further explained in combination with the specific embodiment and the drawings, such as Figures 1-4As shown, according to the oil-containing flue gas treatment device for cold rolling of the utility model embodiment, including processing cylinder 1 and exhaust pump 16, processing cylinder 1 side is equipped with exhaust pump 16, and exhaust pump 16 suction end is connected with processing cylinder 1 top mouth through exhaust pipe 15, and processing cylinder 1 inside is fixedly installed with baffle 7, baffle 7 surface is connected with air cylinder 8, and air cylinder 8 outside is located baffle 7 surface and is connected with downspout 10, and downspout 10 extends to processing cylinder 1 bottom, and downspout 10 bottom mouth is lower than the lowest trigger liquid level of liquid level switch 14, avoids that flue gas is not treated and leaks, and processing cylinder 1 side surface is located baffle 7 below and is inserted with lye spray pipe 4, and processing cylinder 1 side surface is located air cylinder 8 above and is inserted with acid liquid spray pipe 5, and the surface of acid liquid spray pipe 5 and lye spray pipe 4 is all connected with atomizing nozzle 6, and atomizing nozzle 6 is evenly distributed, and processing cylinder 1 bottom is fixedly installed with liquid level switch 14, and processing cylinder 1 bottom side surface is connected with air inlet pipe 2, and processing cylinder 1 bottom surface is connected with bottom pipe 11, and bottom pipe 11 bottom mouth is connected with self-cleaning filter 12, and processing cylinder 1 other side is installed with oil-water separator 18, and oil-water separator 18 liquid inlet end is connected with the liquid outlet pipe of self-cleaning filter 12 through connecting pipe 17, and bottom pipe 11 surface is installed with electromagnetic valve 13, and the input end of electromagnetic valve 13 is electrically connected with the output end of liquid level switch 14, when treating oil-containing flue gas for cold rolling, exhaust pump 16 starts, and the air inside processing cylinder 1 is extracted, so that the inside of processing cylinder 1 presents negative pressure state, and oil-containing flue gas for cold rolling is sucked into processing cylinder 1 through air inlet pipe 2, lye spray pipe 4 is connected with lye pumping equipment, and lye is sprayed out through atomizing nozzle 6, and is combined with oil-containing flue gas for cold rolling, removes acidic substances in oil-containing flue gas for cold rolling, and captures particulate matter and oil of oil-containing flue gas for cold rolling, so that it falls into processing cylinder 1 bottom together, and oil-containing flue gas for cold rolling after lye washing passes through air cylinder 8 and enters above baffle 7, acid liquid spray pipe 5 is connected with acid liquid pumping equipment, and acid liquid is sprayed out through atomizing nozzle 6, and removes alkaline substances in oil-containing flue gas for cold rolling, and acid liquid enters processing cylinder 1 bottom along downspout 10, and purified gas is discharged along exhaust pipe 15, when liquid level reaches the set value, liquid level switch 14 opens electromagnetic valve 13, and after sewage and oil are filtered through self-cleaning filter 12, impurities are removed, solid particles are filtered, and lye, acid liquid and oil enter oil-water separator 18, and oil is separated, to complete the treatment of oil-containing flue gas for cold rolling, the device completes the continuous treatment of oil-containing flue gas for cold rolling through the spraying of lye and acid liquid, and the trouble of frequent replacement of lye and acid liquid is saved, the treatment process is more continuous and reliable, the convenience and work efficiency are improved, meanwhile, lye and acid liquid produce neutralization reaction at processing cylinder 1 bottom, reduce the corrosiveness to subsequent equipment, protect oil-water separator 18 and self-cleaning filter 12, and self-cleaning filter 12 can automatically clean, the trouble of frequent manual cleaning is saved, and the convenience and work efficiency are further improved.

[0031] In one embodiment, the top cover 9 is fixedly installed above the air cylinder 8 by the support 19, and the top cover 9 is in the shape of an umbrella, which avoids the acid liquid directly passing through the air cylinder 8.

[0032] In one embodiment, the air cylinder 8 is uniformly arranged with a plurality of air cylinders, which improves the exhaust capacity.

[0033] In one embodiment, the acid liquid nozzle 5 is connected to an acid liquid pumping device, which is a common structure in the art and is not shown in the figure.

[0034] In one embodiment, the alkali liquid nozzle 4 is connected to an alkali liquid pumping device, which is a common structure in the art and is not shown in the figure.

[0035] In one embodiment, a demister 3 is fixedly installed at the top of the treatment cylinder 1, which avoids water mist entering the air exhaust pipe 15.

[0036] In one embodiment, a support leg is fixedly installed at the bottom of the treatment cylinder 1, which facilitates the installation of the self-cleaning filter 12.

[0037] In one embodiment, the top of the treatment cylinder 1 is in the shape of a horn, which facilitates the collection and discharge of air.

[0038] Working principle:

[0039] In the treatment of oil-containing flue gas for cold rolling, the air suction pump 16 is started to suck out the air inside the treatment cylinder 1, so that the inside of the treatment cylinder 1 is in a negative pressure state, the oil-containing flue gas for cold rolling is sucked into the treatment cylinder 1 through the air inlet pipe 2, the alkali liquid spraying pipe 4 is connected to the alkali liquid pumping device, the alkali liquid is sprayed out through the atomizing nozzle 6, combined with the oil-containing flue gas for cold rolling, removes the acidic substances in the oil-containing flue gas for cold rolling, and captures the particulate matter and oil of the oil-containing flue gas for cold rolling, so that they fall into the bottom of the treatment cylinder 1 together, the alkali-washed oil-containing flue gas for cold rolling passes through the air cylinder 8 into the upper part of the baffle 7, the acid liquid spraying pipe 5 is connected to the acid liquid pumping device, the acid liquid is sprayed out through the atomizing nozzle 6, the alkaline substances in the oil-containing flue gas for cold rolling are removed, the acid liquid enters the bottom of the treatment cylinder 1 along the downspout 10, and the purified gas is discharged along the air suction pipe 15; when the liquid level reaches the set value, the liquid level switch 14 opens the electromagnetic valve 13, the sewage and oil are filtered and impurities are removed after passing through the self-cleaning filter 12, the solid particles are filtered, the alkali liquid, the acid liquid and the oil enter the oil-water separator 18, the oil is separated out, the treatment of the oil-containing flue gas for cold rolling is completed, the device completes the continuous treatment of the oil-containing flue gas for cold rolling through the spraying of alkali liquid and acid liquid, which saves the trouble of frequent replacement of alkali liquid and acid liquid, the treatment process is more continuous and reliable, and the convenience and working efficiency are improved. At the same time, the alkali liquid and the acid liquid produce a neutralization reaction at the bottom of the treatment cylinder 1, reducing the corrosiveness to subsequent equipment, protecting the oil-water separator 18 and the self-cleaning filter 12, and the self-cleaning filter 12 can automatically clean, saving the trouble of frequent manual cleaning, and further improving the convenience and working efficiency.

[0040] In the present application, unless otherwise specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction relationship between two elements, unless otherwise specified, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application.

[0041] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An oil fume treatment device for cold rolling characterized by comprising: The utility model provides a kind of acid-alkali treatment device, including processing cylinder (1) and suction pump (16), the processing cylinder (1) one side is equipped with suction pump (16), and suction pump (16) intake end is connected with the top mouth of processing cylinder (1) through suction pipe (15) and passes through, and processing cylinder (1) inside is fixedly installed with baffle (7), the surface of baffle (7) is connected with air cylinder (8) and passes through, and air cylinder (8) outside is located baffle (7) surface and passes through and is connected with downspout (10), and downspout (10) extends to the bottom of processing cylinder (1), the processing cylinder (1) one side surface is located below baffle (7) and is inserted with lye spray pipe (4) and passes through, and processing cylinder (1) one side surface is located above air cylinder (8) and is inserted with acid liquid spray pipe (5) and passes through, and the surface of acid liquid spray pipe (5) and lye spray pipe (4) is connected with atomizing nozzle (6) and passes through, the bottom of processing cylinder (1) is fixedly installed with liquid level switch (14), and the bottom of processing cylinder (1) one side surface is connected with air inlet pipe (2) and passes through, the bottom surface of processing cylinder (1) is connected with bottom pipe (11) and passes through, and bottom pipe (11) bottom mouth is connected with self-cleaning filter (12) and passes through, the other side of processing cylinder (1) is equipped with oil-water separator (18), and oil-water separator (18) liquid inlet end is connected with the liquid outlet pipe of self-cleaning filter (12) and passes through connecting pipe (17), the surface of bottom pipe (11) is installed with electromagnetic valve (13), and the input end of electromagnetic valve (13) is electrically connected with the output end of liquid level switch (14).

2. The oil-containing flue gas treatment device for cold rolling according to claim 1, characterized by, The air cylinder (8) is fixedly installed with top cover (9) through support (19) above, and the top cover (9) is umbrella-shaped structure.

3. The oil-containing flue gas treatment device for cold rolling according to claim 1, characterized by, The air cylinder (8) is evenly arranged with multiple.

4. The oil-laden flue gas treatment device for cold rolling according to claim 1, characterized by, The acid liquid spray pipe (5) is connected with acid liquid pumping equipment.

5. The oil-laden flue gas treatment device for cold rolling according to claim 1, characterized by, The lye spray pipe (4) is connected with alkali liquid pumping equipment.

6. The oil-laden flue gas treatment device for cold rolling according to claim 1, characterized by, The processing cylinder (1) is fixedly installed with demister (3) in top.

7. The oil-laden flue gas treatment device for cold rolling according to claim 1, characterized by, The processing cylinder (1) bottom surface is fixedly installed with support leg.

8. The oil-laden flue gas treatment device for cold rolling according to claim 1, characterized by, The top of processing cylinder (1) is horn-shaped structure.

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