Odor treatment system for corn starch workshop

Abstract

The utility model provides a corn starch workshop peculiar smell treatment system which comprises an induced draft fan, a washing tower and an exhaust fan, an inlet of the induced draft fan is connected with a storage tank generating peculiar smell in a corn starch workshop, an outlet of the induced draft fan is connected with an air inlet of the washing tower, and an exhaust port in the top of the washing tower is connected with the exhaust fan. The washing tower is internally and sequentially provided with a first filler filter layer and a second filler filter layer from top to bottom, and a first spraying pipe with a nozzle and a second spraying pipe with a nozzle are arranged above the first filler filter layer and the second filler filter layer respectively; the second spraying pipe is connected with a process water pipeline of a corn starch workshop, and a circulating pipeline is arranged at the lower part of the washing tower and is connected to the first spraying pipe. According to the utility model, sulfur dioxide gas and other peculiar smell gas generated in the corn starch workshop are collected and treated, so that the working environment of the production workshop is improved, and the harm of irritant gas to human bodies is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of corn starch production, in particular to a corn starch workshop odor treatment system. Background Art

[0002] At present, in the process of domestic corn starch production, sulfurous acid is generally used to soak corn. The source of sulfurous acid is usually produced by dissolving sulfur dioxide gas produced by burning solid sulfur in water. Sulfur dioxide is a colorless, irritating gas. After inhalation, it is easily absorbed by the moist mucous membrane surface to produce sulfurous acid or sulfuric acid, which is harmful to the human body. In the process of preparing sulfurous acid, some sulfurous acid gas often overflows, which seriously endangers the physical and mental health of the operating staff. At the same time, since sulfurous acid is used to soak corn, some sulfurous acid will remain in the corn grains after soaking. In the subsequent corn starch processing process, the remaining sulfurous acid will decompose under heat to produce some sulfur dioxide gas and other odorous gases, causing the entire production workshop to be filled with sulfur dioxide gas and other odors, which will pollute the working environment and cause physical harm to the operating staff. Utility Model Content

[0003] In view of the deficiencies of the above-mentioned prior art, the utility model provides a corn starch workshop odor treatment system, which solves the problem of odor in the workshop during the previous corn starch production process. At the same time, sulfur dioxide gas can be collected and recycled for use in the acid production process, greatly reducing production costs.

[0004] The utility model provides a technical solution: a corn starch workshop odor treatment system, comprising an induced draft fan, a washing tower and an exhaust fan, wherein the inlet of the induced draft fan is connected to a storage tank generating odor in the corn starch workshop, the outlet of the induced draft fan is connected to the air inlet of the washing tower, the exhaust port at the top of the washing tower is connected to the exhaust fan, and the treated clean air is discharged to the outdoors, a first filler filter layer and a second filler filter layer are sequentially arranged in the washing tower from top to bottom, a first spray pipe and a second spray pipe with nozzles are respectively arranged above the first filler filter layer and the second filler filter layer, the second spray pipe is connected to the process water pipeline of the corn starch workshop, and a circulation pipeline connected to the first spray pipe is arranged at the lower part of the washing tower.

[0005] Furthermore, an overflow port is provided at the lower part of the washing tower, the overflow port is connected to the buffer tank through a pipeline, the lower pipeline of the buffer tank is connected to the delivery pump, and the delivery pump pipeline is connected to the acid making process.

[0006] Furthermore, an exhaust pipe is installed on the top of each storage tank and is connected to the induced draft fan, and a regulating valve is installed on the exhaust pipe of each storage tank.

[0007] Furthermore, the storage tanks include any one or more of various buffer tanks in a corn starch workshop, sulfite storage tanks in an acid-making process, and process water tanks.

[0008] Furthermore, the process water pipeline is installed with a first regulating valve and a first pressure gauge, and the first regulating valve and the first pressure gauge are interlocked to control the pressure of the washing water.

[0009] Furthermore, the process water of the process water pipeline comes from the washing water after starch washing in the corn starch workshop.

[0010] Furthermore, a circulation pump, a second pressure gauge and a second regulating valve are provided on the circulation pipeline, and the second pressure gauge is interlocked with the second regulating valve.

[0011] Furthermore, the inlet of the circulation pump is connected to a NaOH liquid pipeline, and a third regulating valve is installed on the pipeline.

[0012] Furthermore, an online pH meter is installed at the lower part of the washing tower to monitor and feedback the pH value of the washing water in real time, and is interlocked with the third regulating valve on the NaOH liquid pipeline to control the pH value of the washing water.

[0013] Furthermore, a gas guide plate is installed at the upper part of the washing tower, and the gas guide plate is a partition with holes.

[0014] Beneficial effects of the utility model:

[0015] (1) The utility model collects and treats sulfur dioxide gas and other odorous gases generated in the corn starch production workshop, which greatly improves the working environment of the production workshop, eliminates the harm of irritating gases to the human body, and makes a beneficial contribution to the clean production of the entire starch workshop.

[0016] (2) The utility model deeply treats sulfur dioxide gas and other odorous gases, and the discharged air is clean air after treatment, which also makes a beneficial attempt for the environmentally friendly operation of the entire production.

[0017] (3) The utility model dissolves the recovered sulfur dioxide gas in process water and transports it to the acid-making process for the production of sulfurous acid, thereby greatly reducing the cost of sulfurous acid production, saving the amount of sulfur used, and allowing the process water to be recycled and reused, creating greater economic value for production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] In the figure: 1—storage tank, 2—induced draft fan, 3—exhaust fan, 4—washing tower, 4-1—first filler filter layer, 4-2—second filler filter layer, 4-3—overflow port, 4-4—online pH meter, 4-5—gas guide plate, 5—first spray pipe, 6—second spray pipe, 7—process water pipeline, 8—circulation pipeline, 9—buffer tank, 10—delivery pump, 11—regulating valve, 12—first regulating valve, 13—first pressure gauge, 14—circulation pump, 15—second pressure gauge, 16—second regulating valve, 17—NaOH liquid pipeline, 18—third regulating valve, 19—acid production process pipeline. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific implementation methods, wherein the accompanying drawings are only used for exemplary descriptions and represent only schematic diagrams rather than actual drawings, and should not be understood as limiting the present invention. In order to better illustrate the specific implementation methods of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. Based on the specific implementation methods of the present invention, all other specific implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1A corn starch workshop odor treatment system shown in the figure includes an induced draft fan 2, a washing tower 4 and an exhaust fan 3, the inlet of the induced draft fan 2 is connected to each storage tank 1 that generates odor in the corn starch workshop, the outlet of the induced draft fan 2 is connected to the air inlet of the washing tower 4, and the exhaust port at the top of the washing tower 4 is connected to the exhaust fan 3 to discharge the treated clean air to the outside, and a first filler filter layer 4-1 and a second filler filter layer 4-2 are sequentially arranged in the washing tower 4 from top to bottom, and a first spray pipe 5 and a second spray pipe 6 with nozzles are respectively arranged above the first filler filter layer 4-1 and the second filler filter layer 4-2, and the second spray pipe 6 is connected to the process water pipeline 7 of the corn starch workshop, and a circulation pipeline 8 connected to the first spray pipe 5 is arranged at the lower part of the washing tower 1.

[0024] The lower part of the washing tower 4 is provided with an overflow port 4-3, which is connected to a buffer tank 9 through a pipeline, and the lower pipeline of the buffer tank 9 is connected to a delivery pump 10, and the delivery pump pipeline is connected to the acid making process.

[0025] Each of the storage tanks 1 is equipped with an exhaust pipe on the top and connected to the induced draft fan 2, and each storage tank exhaust pipe is equipped with a regulating valve 11. The storage tank 1 can be various buffer tanks, sulfite storage tanks in the acid production process, process water tanks in the workshop, and various storage tanks and square boxes that produce odor.

[0026] The process water pipeline 7 is installed with a first regulating valve 12 and a first pressure gauge 13, which are interlocked to control the pressure of the washing water. The process water of the process water pipeline 7 comes from the washing water after starch washing in the corn starch workshop.

[0027] The circulation pipeline 8 is provided with a circulation pump 14, a second pressure gauge 15 and a second regulating valve 16, and the second pressure gauge 15 is interlocked with the second regulating valve 16. The inlet of the circulation pump 14 is connected to a NaOH liquid pipeline 17, and a third regulating valve 18 is installed on the pipeline, which can adjust the pH value of the circulating water in the washing tower 4 according to the process requirements to achieve the best odor treatment effect.

[0028] An online pH meter 4-4 is installed at the lower part of the washing tower 4 to monitor and feedback the pH value of the washing water in real time, and is interlocked with the third regulating valve 18 on the NaOH liquid pipeline 17 to set the pH value according to the operation requirements to achieve the purpose of automatically operating and controlling the pH value of the circulating water.

[0029] A gas guide plate 4-5 is installed at the upper part of the washing tower 4. The gas guide plate 4-5 is a partition with holes, so that the gas is more evenly distributed during the rising process inside the washing tower, so as to more thoroughly remove sulfur dioxide and odor gas molecules.

[0030] Two groups of filler filter layers are installed inside the washing tower 4, which can fully filter and intercept sulfur dioxide gas and other odorous gases, so that they can be dissolved in process water to the maximum extent.

[0031] The two groups of spray pipes sprayed by nozzles in the washing tower 4 can atomize the process water and the circulating water under specific pressure conditions, increase the contact area between the process water and the gas, and thus make the sulfur dioxide gas and the odorous gas better dissolved in the process water.

[0032] When the utility model is used specifically, process water can be transported through a pipeline to the second spray pipe 6 in the middle of the washing tower 4 and sprayed through a nozzle. The process water pressure is adjusted to be stable at 0.4-0.5Mpa, and the pressure stability is maintained to achieve the best atomization state. The process water flows through the second filler filter layer 4-2 and enters the lower part of the washing tower for storage. Then the circulation pump 14 is started to transport the process water to the first spray pipe 5 at the upper part of the washing tower 4 and sprayed through a nozzle. The process water first passes through the first filler filter layer 4-1, and the pressure of the washing water is adjusted to be stable at 0.4-0.5Mpa for circulating washing.

[0033] Start the exhaust fan 3, then start the induced draft fan 2, adjust the valves on the top of each storage tank 1, control the air extraction volume of each storage tank, and achieve the best working state. The induced draft fan 2 brings the sulfur dioxide gas and odor gas from each storage tank 1 into the lower part of the washing tower 4 through the air inlet of the washing tower 4. The gas entering the washing tower 4 slowly rises under the action of the induced draft fan 2 and the gas guide plate 4-5. During the rising process, it fully contacts and merges with the mist-formed process water. The merged process water enters the lower part of the washing tower 4 after passing through the packing filter layer and is recirculated after passing through the circulating pump 14. The clean air after washing and filtration is taken out through the exhaust fan 3. After running for a period of time, the pH of the circulating water that absorbs and fuses sulfur dioxide gas and other odors will decrease. At this time, the pH meter of the online pH control system installed at the lower part of the washing tower 4 is set, and the pH control system will automatically open the third regulating valve 18 on the NaOH pipeline 17 to add NaOH liquid to the circulating water to increase the pH value of the process water to meet the operating process requirements. When the liquid level of the circulating water at the bottom of the washing tower 4 exceeds the overflow port 4 - 3 , it will enter the buffer tank 9 through the overflow port and then be transported to the acid making process through the delivery pump 10 .

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A corn starch workshop odor treatment system, characterized by: The invention comprises an induced draft fan (2), a washing tower (4) and an exhaust fan (3), wherein the inlet of the induced draft fan (2) is connected to each storage tank (1) generating odor in a corn starch workshop, the outlet of the induced draft fan (2) is connected to the air inlet of the washing tower (4), the exhaust port at the top of the washing tower (4) is connected to the exhaust fan (3) to discharge the treated clean air to the outside, the washing tower (4) is provided with a first filler filter layer (4-1) and a second filler filter layer (4-2) in sequence from top to bottom, a first spray pipe (5) and a second spray pipe (6) with nozzles are respectively provided above the first filler filter layer (4-1) and the second filler filter layer (4-2), the second spray pipe (6) is connected to a process water pipeline (7) of the corn starch workshop, and a circulation pipeline (8) is provided at the bottom of the washing tower (4) and connected to the first spray pipe (5).

2. A corn starch workshop odor treatment system according to claim 1, characterized in that: The lower part of the washing tower (4) is provided with an overflow port (4-3), which is connected to a buffer tank (9) through a pipeline, and the lower pipeline of the buffer tank (9) is connected to a delivery pump (10), and the delivery pump pipeline is connected to the acid production process.

3. A corn starch workshop odor treatment system according to claim 1, characterized in that: An exhaust pipe is installed on the top of each storage tank (1) and is connected to the induced draft fan (2), and a regulating valve (11) is installed on the exhaust pipe of each storage tank.

4. A corn starch workshop odor treatment system according to claim 3, characterized in that: The storage tank (1) includes any one or more of various buffer tanks in a corn starch workshop, sulfite storage tanks in an acid production process, and process water tanks.

5. The corn starch workshop odor treatment system according to claim 1, characterized in that: The process water pipeline (7) is equipped with a first regulating valve (12) and a first pressure gauge (13), and the first regulating valve (12) and the first pressure gauge (13) are interlocked to control the pressure of the washing water.

6. A corn starch workshop odor treatment system according to claim 5, characterized in that: The process water of the process water pipeline (7) comes from the washing water after starch washing in the corn starch workshop.

7. The corn starch workshop odor treatment system according to claim 1, characterized in that: The circulation pipeline (8) is provided with a circulation pump (14), a second pressure gauge (15) and a second regulating valve (16), and the second pressure gauge (15) and the second regulating valve (16) are interlocked.

8. The corn starch workshop odor treatment system according to claim 7, characterized in that: The inlet of the circulation pump (14) is connected to a NaOH liquid pipeline (17), and a third regulating valve (18) is installed on the pipeline.

9. A corn starch workshop odor treatment system according to claim 8, characterized in that: An online pH meter (4-4) is installed at the lower part of the washing tower (4) to monitor and feedback the pH value of the washing water in real time, and to control the pH value of the washing water in conjunction with the third regulating valve (18) on the NaOH liquid pipeline (17).

10. The corn starch workshop odor treatment system according to claim 1, characterized in that: A gas guide plate (4-5) is installed at the upper part of the washing tower (4), and the gas guide plate (4-5) is a partition plate with holes.

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