Sulfurous acid preparation system formed by workshop process water vacuum absorption unit

Abstract

The utility model relates to the technical field of sulfurous acid preparation, in particular to a sulfurous acid preparation system formed by a workshop process water vacuum absorption unit, which is characterized in that firstly, a water ejector matched with the vacuum absorption unit is changed into vertical installation so as to improve the working efficiency; and the efficiency loss caused by high protein viscosity in the process water is effectively made up. Secondly, a gas-liquid separation part of a circulating storage tank matched with the vacuum absorption unit is added, so that bubbles in liquid are separated out, and the working requirements of a water ejector matched with the vacuum absorption unit and a circulating water pump matched with the vacuum absorption unit are met; comprising a sulfur combustion furnace, a sulfur storage box, a primary absorption tower, a secondary absorption tower, a vacuum absorption unit matched conveying water pump, a vacuum absorption unit matched circulating storage tank, a vacuum absorption unit matched circulating water pump and a vacuum absorption unit matched water ejector.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sulfurous acid preparation technology, and specifically relates to a sulfurous acid preparation system formed by a workshop process water vacuum absorption unit. BACKGROUND

[0002] China is a country with scarce water resources. In the face of such a pressing situation, we must realize that protecting water resources and achieving sustainable use of water resources is not only the need of environmental protection, but also the cornerstone of sustainable economic and social development. Especially for some water-intensive industries, such as the starch industry, water reuse is not only an environmental protection measure, but also a key strategy for improving economic efficiency and sustainable development capability. Under this background, the past sulfurous acid preparation system formed by the horizontal vacuum absorption unit using primary water as working medium has been put on the reform agenda. Process water cannot be used as the working medium of the horizontal vacuum absorption unit because the process water contains protein. The reason is that the presence of protein can significantly affect the basic physical properties of water, especially its foaming property and viscosity, which directly affects the efficiency and stability of the water ejector matched with the vacuum absorption unit. In the operation mechanism of the water ejector matched with the vacuum absorption unit, too much foam can seriously hinder the smoothness of the water flow, resulting in low jet efficiency. It may even cause the vacuum absorption unit matched with the circulating water pump to be gas blocked, affecting the normal operation of the equipment. SUMMARY

[0003] (I) Technical problems solved

[0004] In view of the deficiencies of the prior art, the utility model provides a sulfurous acid preparation system formed by a workshop process water vacuum absorption unit. First, the water ejector matched with the vacuum absorption unit is changed to vertical installation to improve its working efficiency and effectively make up for the efficiency loss caused by the high viscosity of the process water containing protein. Second, the gas-liquid separation component of the circulating tank matched with the vacuum absorption unit is added to separate the gas bubbles in the liquid, so as to meet the working requirements of the water ejector matched with the vacuum absorption unit and the circulating water pump matched with the vacuum absorption unit, thereby enhancing the practicability of the sulfurous acid preparation system formed by the workshop process water vacuum absorption unit.

[0005] (II) Technical solutions

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a kind of sulphurous acid preparation system using workshop process water vacuum absorption unit, including sulphur furnace, sulfur storage tank, primary absorption tower, secondary absorption tower, vacuum absorption unit supporting delivery water pump, vacuum absorption unit supporting circulating storage tank, vacuum absorption unit supporting circulating water pump and vacuum absorption unit supporting water injector, the flue gas outlet of the top of sulphur furnace is connected with the right side area of the bottom of corresponding primary absorption tower by pipeline, the corresponding sulfur storage tank is communicated with the feed inlet of corresponding sulphur furnace, the bottom end of vacuum absorption unit supporting water injector is communicated with the left side area of the top end of corresponding vacuum absorption unit supporting circulating storage tank, the top end of vacuum absorption unit supporting water injector is communicated with one side of corresponding vacuum absorption unit supporting circulating water pump by pipeline, the right end top area of vacuum absorption unit supporting water injector is communicated with the top end middle part of primary absorption tower by pipeline, one side of vacuum absorption unit supporting circulating water pump is communicated with the bottom area of left end of corresponding vacuum absorption unit supporting circulating storage tank, the top middle part of vacuum absorption unit supporting circulating storage tank is communicated with the right side bottom area of corresponding secondary absorption tower by pipeline, one side of vacuum absorption unit supporting delivery water pump is communicated with the right side bottom area of vacuum absorption unit supporting circulating storage tank, one side of vacuum absorption unit supporting delivery water pump is communicated with the right side area of top end of primary absorption tower by pipeline, the top area of left end of vacuum absorption unit supporting circulating storage tank is communicated with the left end bottom area of corresponding secondary absorption tower by pipeline.

[0007] Further, the left side bottom area outlet of the absorption tower is communicated with corresponding sulphurous acid storage tank by pipeline.

[0008] Further, it further includes regulating valve and flowmeter, and the acid making water system is communicated with the right side area of top end of corresponding secondary absorption tower by pipeline, and flowmeter and regulating valve are sequentially arranged on the pipeline.

[0009] Further, it further includes control cabinet, and the control cabinet is connected with corresponding sulphur furnace, sulfur storage tank, primary absorption tower, secondary absorption tower, vacuum absorption unit supporting delivery water pump, vacuum absorption unit supporting circulating storage tank, vacuum absorption unit supporting circulating water pump, vacuum absorption unit supporting water injector, regulating valve and flowmeter.

[0010] (Three) beneficial effects

[0011] Compared with prior art, the utility model provides a kind of sulphurous acid preparation system using workshop process water vacuum absorption unit, with following beneficial effects:

[0012] The vacuum absorption unit using the workshop process water constitutes a sulfurous acid preparation system. 1. First, the water ejector supporting the vacuum absorption unit is changed to a vertical installation to improve its working efficiency, effectively compensating for the efficiency loss caused by the high viscosity of the process water containing protein. Second, a gas-liquid separation component is added to the circulating storage tank supporting the vacuum absorption unit to separate the bubbles in the liquid to meet the working requirements of the water ejector supporting the vacuum absorption unit and the circulating water pump supporting the vacuum absorption unit. After these two major improvements, the effect is obvious. The sulfurous acid prepared from the process water can be both a working medium and an absorption medium, no longer consuming several cubic meters of primary water per hour, improving economic benefits for customers and reducing the pressure of water use and environmental protection. The on-site operation experience of the equipment proves that the sulfurous acid preparation system composed of the vacuum absorption unit using the protein-containing process water operates stably and reliably, achieving the expected design effect of energy conservation and water conservation. 2. In the entire process, the water ejector supporting the vacuum absorption unit is one of the important components. It can not only make the sulfur dioxide molecules collide and contact violently with the water molecules, greatly increasing the absorption of sulfur dioxide by water, but also is the power source of the entire gas circuit. 3. The liquid circuit adopts a countercurrent washing and absorption method, which not only greatly improves the resource utilization efficiency but also effectively reduces environmental pollution, and is an important promoter for realizing green production and sustainable development. Through a sulfurous acid preparation system composed of a vacuum absorption unit using the workshop process water, first, the water ejector supporting the vacuum absorption unit is changed to a vertical installation to improve its working efficiency, effectively compensating for the efficiency loss caused by the high viscosity of the process water containing protein. Second, a gas-liquid separation component is added to the circulating storage tank supporting the vacuum absorption unit to separate the bubbles in the liquid to meet the working requirements of the water ejector supporting the vacuum absorption unit and the circulating water pump supporting the vacuum absorption unit, thereby enhancing the practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. is a process flow diagram of a single sulfur-burning furnace and a sulfur storage tank of a sulfurous acid preparation system composed of a vacuum absorption unit using the workshop process water according to the present utility model;

[0014] Figure 2 FIG. is a process flow diagram of a double sulfur-burning furnace and a sulfur storage tank of a sulfurous acid preparation system composed of a vacuum absorption unit using the workshop process water according to the present utility model.

[0015] In the figure: 1. Sulfur-burning furnace; 2. Sulfur storage tank; 3. First-stage absorption tower; 4. Second-stage absorption tower; 5. Control valve; 6. Flowmeter; 7. Control cabinet; 8. Delivery water pump supporting the vacuum absorption unit; 9. Circulating storage tank supporting the vacuum absorption unit; 10. Circulating water pump supporting the vacuum absorption unit; 11. Water ejector supporting the vacuum absorption unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0017] Embodiment 1: please refer to Figure 1 The process flow diagram, a kind of preparation system of sulfurous acid using workshop process water vacuum absorption unit, including sulfur furnace 1, sulfur storage tank 2, first absorption tower 3, second absorption tower 4, vacuum absorption unit supporting delivery water pump 8, vacuum absorption unit supporting circulating storage tank 9, vacuum absorption unit supporting circulating water pump 10 and vacuum absorption unit supporting water injector 11, the flue gas outlet of the top of sulfur furnace 1 is connected with the right side area of the bottom of corresponding first absorption tower 3 by pipeline, the corresponding sulfur storage tank 2 is communicated with the feed inlet of corresponding sulfur furnace 1, the bottom end of vacuum absorption unit supporting water injector 11 is communicated with the left side area of the top end of corresponding vacuum absorption unit supporting circulating storage tank 9, the top end of vacuum absorption unit supporting water injector 11 is communicated with the side of corresponding vacuum absorption unit supporting circulating water pump 10 by pipeline, the right end top area of vacuum absorption unit supporting water injector 11 is communicated with the top middle of first absorption tower 3 by pipeline, the side of vacuum absorption unit supporting circulating water pump 10 is communicated with the bottom area of left end of corresponding vacuum absorption unit supporting circulating storage tank 9, the top middle of vacuum absorption unit supporting circulating storage tank 9 is communicated with the right side bottom area of corresponding second absorption tower 4 by pipeline, the side of vacuum absorption unit supporting delivery water pump 8 is communicated with the right side bottom area of vacuum absorption unit supporting circulating storage tank 9, the side of vacuum absorption unit supporting delivery water pump 8 is communicated with the right side area of top of first absorption tower 3 by pipeline, the top area of left end of vacuum absorption unit supporting circulating storage tank 9 is communicated with the left end bottom area of corresponding second absorption tower 4 by pipeline.

[0018] When the device is used, the number of sulfur furnace 1 and sulfur storage tank 2 is set to a group, the raw material sulfur in sulfur storage tank 2 enters sulfur furnace 1 by quantitative disturbance under the instruction of control cabinet 7, burns in sulfur furnace 1 and generates sulfur dioxide mixed flue gas, is discharged from the tail of sulfur furnace 1 into the lower part of first absorption tower 3, meets water flowing downward in absorption tower, and water absorbs sulfur dioxide to generate sulfurous acid, which is discharged from the lower outlet of absorption tower to sulfurous acid storage tank.

[0019] The remaining mixed furnace gas continues to the top outlet of the absorption tower and enters the water jet 11 inlet under the drive of the vacuum absorption unit. The working principle of the water jet 11 is ingenious and efficient. It uses the negative pressure area formed by the high-speed water flow to forcefully suck the sulfur-containing furnace gas and complete the gas-liquid mixing in an instant. In this process, the sulfur dioxide molecules collide and contact with water molecules, greatly increasing the opportunity for sulfur dioxide to be absorbed by water. This is not just a simple physical process, but a perfect combination of chemical absorption and physical dissolution, ensuring high removal rate or high absorption rate of sulfur dioxide. Therefore, it is a process of secondary strengthening absorption of sulfur dioxide in the mixed furnace gas. The water jet 11 outlet is directly connected to the vacuum absorption unit circulating tank 9. When the water jet 11 uses its powerful power to accurately inject the gas-liquid mixture into the vacuum absorption unit circulating tank 9, efficient gas-liquid separation is performed. As the core component of this process, the water jet 11 fully considers the physical principles and dynamic characteristics of gas-liquid separation. When the gas-liquid mixture flows into the tank, due to the sudden reduction of flow rate and the expansion of space, the interaction between gas and liquid weakens, and natural separation occurs. The gas part gradually rises and gathers at the top of the vacuum absorption unit circulating tank 9, while the liquid sinks under the action of gravity, realizing preliminary physical separation. To enhance the separation effect, the vacuum absorption unit circulating tank 9 is equipped with a guiding component separation device, which can further refine the separation process and ensure that the gas is efficiently discharged, while the pure liquid is recycled and reused. This refined gas-liquid separation technology not only greatly improves the utilization rate of resources but also eliminates the negative impact of excessive gas in the liquid on the operation of the vacuum absorption unit circulating water pump 10 and the vacuum absorption unit circulating water pump 10.

[0020] The separated gas is discharged from the top outlet of the vacuum absorption unit circulating tank 9, enters the second-stage absorption tower 4 through the lower gas inlet of the second-stage absorption tower, and undergoes a third absorption process. This step, as one of the important links in the entire gas absorption sequence, not only aims to fully save sulfur resources, but also ensures that the exhaust gas meets the relevant national environmental protection standards.

[0021] The gas circuit has completed the process from the air entering the air conditioning door of the sulfur combustion furnace 1, reacting with sulfur to generate sulfur dioxide mixed furnace gas, first entering the first-stage absorption tower 3 for multiple washing and absorption, then entering the water jet 11 of the vacuum absorption unit for strong absorption, then being separated by the vacuum absorption unit circulating tank 9, entering the second-stage absorption tower 4 for a third washing and absorption, and finally being discharged through the exhaust pipe.

[0022] The vacuum suction unit matched with the water injector 11 is one of the important components in the whole process, which not only can make the sulfur dioxide molecules and water molecules collide and contact violently, greatly increasing the effect of sulfur dioxide being absorbed by water, but also is the power source of the whole gas circuit.

[0023] The liquid circuit adopts the countercurrent washing and absorption mode, which not only greatly improves the resource utilization efficiency, but also effectively reduces the environmental pollution, and is an important driving force for realizing green production and sustainable development.

[0024] The core of the technology lies in the word "countercurrent", that is, the washing liquid and the fluid to be treated flow in opposite directions, forming a high-efficiency contact and reaction interface. This design ensures that there is always a certain concentration difference between the two, so that the solute can be more fully captured and dissolved by the washing liquid, thereby achieving the purpose of deep purification and absorption, and realizing the dual goals of deep washing and absorption and maximum resource utilization.

[0025] The acid-making water is driven by the regulating valve 5 under the instruction of the control cabinet 7, and is metered by the flowmeter 6 to supply water to the secondary absorption tower 4. The acid-making water enters the tower from the top liquid inlet of the secondary absorption tower 4, and then flows to the vacuum suction unit matched circulating tank 9 from the lower liquid outlet, and then is pumped by the vacuum suction unit matched water pump 8 to the top liquid inlet of the primary absorption tower 3, and then enters the tower to perform the washing and absorption process, and then flows out from the lower liquid outlet to the sulfurous acid tank, completing the liquid circuit.

[0026] The process flow is simple and adopts advanced technology, and the pursuit of high efficiency and excellence in the field of industrial cleaning and absorption will be a technological innovation.

[0027] As a preferred embodiment of the above, the outlet of the left bottom area of the absorption tower is communicated with the corresponding sulfurous acid tank through a pipeline.

[0028] As a preferred embodiment of the above, the acid-making water system is communicated with the right side area of the top end of the secondary absorption tower 4 through a pipeline, and the flowmeter 6 and the regulating valve 5 are sequentially arranged on the pipeline.

[0029] As a preferred embodiment of the above, the control cabinet 7 is connected with the corresponding sulfur combustion furnace 1, sulfur storage tank 2, primary absorption tower 3, secondary absorption tower 4, vacuum suction unit matched circulating water pump 8, vacuum suction unit matched circulating tank 9, vacuum suction unit matched circulating water pump 10, vacuum suction unit matched water injector 11, regulating valve 5 and flowmeter 6.

[0030] Example 2: Please refer to Figure 2The process flow diagram is a kind of preparation system of sulfurous acid using workshop process water vacuum absorption unit, including sulfur furnace 1, sulfur storage tank 2, first absorption tower 3, second absorption tower 4, vacuum absorption unit supporting water pump 8, vacuum absorption unit supporting circulating storage tank 9, vacuum absorption unit supporting circulating water pump 10 and vacuum absorption unit supporting water ejector 11, the flue gas outlet at the top of the sulfur furnace 1 is connected with the right side area at the bottom of the corresponding first absorption tower 3 through pipeline, the corresponding sulfur storage tank 2 is communicated with the feed inlet of the corresponding sulfur furnace 1, the bottom end of the vacuum absorption unit supporting water ejector 11 is communicated with the left side area at the top end of the corresponding vacuum absorption unit supporting circulating storage tank 9, the top end of the vacuum absorption unit supporting water ejector 11 is communicated with one side of the corresponding vacuum absorption unit supporting circulating water pump 10 through pipeline, the right end top area of the vacuum absorption unit supporting water ejector 11 is communicated with the top middle of the first absorption tower 3 through pipeline, one side of the vacuum absorption unit supporting circulating water pump 10 is communicated with the bottom area of the left end of the corresponding vacuum absorption unit supporting circulating storage tank 9, the top middle of the vacuum absorption unit supporting circulating storage tank 9 is communicated with the right side bottom area of the corresponding second absorption tower 4 through pipeline, one side of the vacuum absorption unit supporting water pump 8 is communicated with the right side bottom area of the vacuum absorption unit supporting circulating storage tank 9, one side of the vacuum absorption unit supporting water pump 8 is communicated with the right side area at the top of the first absorption tower 3 through pipeline, and the top area of the left end of the vacuum absorption unit supporting circulating storage tank 9 is communicated with the left end bottom area of the corresponding second absorption tower 4 through pipeline.

[0031] When the device is used, the raw material sulfur in the sulfur storage tank 2 enters the sulfur furnace 1 in a controlled manner under the instruction of the control cabinet 7, burns in the sulfur furnace 1 and generates sulfur dioxide mixed flue gas, is discharged from the tail of the sulfur furnace 1 into the lower part of the first absorption tower 3, meets water flowing downward in the absorption tower, and the water absorbs sulfur dioxide to generate sulfurous acid, which is discharged from the lower outlet of the absorption tower to the sulfurous acid storage tank.

[0032] The number of the sulfur furnace 1 and the sulfur storage tank 2 is set to two groups, so that the production efficiency of the whole system is improved.

[0033] The remaining mixed furnace gas continues to the top outlet of the absorption tower and enters the water jet 11 inlet under the drive of the vacuum absorption unit. The working principle of the water jet 11 is ingenious and efficient. It uses the negative pressure area formed by the high-speed water flow to forcefully suck the sulfur-containing furnace gas and complete the gas-liquid mixing in an instant. In this process, the sulfur dioxide molecules collide and contact with water molecules, greatly increasing the opportunity for sulfur dioxide to be absorbed by water. This is not just a simple physical process, but a perfect combination of chemical absorption and physical dissolution, ensuring high removal rate or high absorption rate of sulfur dioxide. Therefore, it is a process of secondary strengthening absorption of sulfur dioxide in the mixed furnace gas. The water jet 11 outlet is directly connected to the vacuum absorption unit circulating tank 9. When the water jet 11 uses its powerful power to accurately inject the gas-liquid mixture into the vacuum absorption unit circulating tank 9, efficient gas-liquid separation is performed. As the core component of this process, the water jet 11 fully considers the physical principles and dynamic characteristics of gas-liquid separation. When the gas-liquid mixture flows into the tank, due to the sudden reduction of flow rate and the expansion of space, the interaction between gas and liquid weakens, and natural separation occurs. The gas part gradually rises and gathers at the top of the vacuum absorption unit circulating tank 9, while the liquid sinks under the action of gravity, realizing preliminary physical separation. To enhance the separation effect, the vacuum absorption unit circulating tank 9 is equipped with a guiding component separation device, which can further refine the separation process and ensure that the gas is efficiently discharged, while the pure liquid is recycled and reused. This refined gas-liquid separation technology not only greatly improves the utilization rate of resources but also eliminates the negative impact of excessive gas in the liquid on the operation of the vacuum absorption unit circulating water pump 10 and the vacuum absorption unit circulating water pump 10.

[0034] The separated gas is discharged from the top outlet of the vacuum absorption unit circulating tank 9, enters the second-stage absorption tower 4 through the lower gas inlet of the second-stage absorption tower, and undergoes a third absorption process. This step, as one of the important links in the entire gas absorption sequence, not only aims to fully save sulfur resources, but also ensures that the exhaust gas meets the relevant national environmental protection standards.

[0035] At this point, the gas circuit has completed the process from the air entering the air conditioning door of the sulfur combustion furnace 1, reacting with sulfur to generate sulfur dioxide mixed furnace gas, first entering the first-stage absorption tower 3 for multiple washing and absorption, then entering the water jet 11 of the vacuum absorption unit for strong absorption. Then, the gas-liquid separation is performed in the vacuum absorption unit circulating tank 9, and the third washing and absorption is performed in the second-stage absorption tower 4. Finally, the exhaust gas is discharged through the exhaust pipe to meet the standard.

[0036] The vacuum suction unit matched with water ejector 11 is one of the important components in the whole process, which not only can make sulfur dioxide molecules and water molecules collide and contact violently, greatly increasing the effect of sulfur dioxide being absorbed by water, but also is the power source of the whole gas circuit.

[0037] The liquid circuit adopts the countercurrent washing and absorption mode, which not only greatly improves the resource utilization efficiency, but also effectively reduces environmental pollution, and is an important driving force for realizing green production and sustainable development.

[0038] The core of the technology lies in the word "countercurrent", that is, the washing liquid and the fluid to be treated flow in opposite directions, forming a high-efficiency contact and reaction interface. This design ensures that there is always a certain concentration difference between the two, so that the solute can be more fully captured and dissolved by the washing liquid, thereby achieving the purpose of deep purification and absorption, and realizing the dual goals of deep washing and absorption and maximum resource utilization.

[0039] The acid-making water is driven by the regulating valve 5 under the instruction of the control cabinet 7, and is metered by the flowmeter 6 to supply water to the secondary absorption tower 4, and the acid-making water enters the tower from the top liquid inlet of the secondary absorption tower 4, and the washing and absorption process is carried out, and then flows out from the lower liquid outlet to the vacuum suction unit matched circulating tank 9, and then is pumped by the vacuum suction unit matched circulating water pump 8 to the top liquid inlet of the primary absorption tower 3, and then enters the tower, and the washing and absorption process is carried out, and then flows out from the lower liquid outlet to the sulfurous acid tank, completing the liquid circuit.

[0040] The process flow is simple and adopts advanced technology, and the pursuit of high efficiency and excellence in the field of industrial cleaning and absorption will be a technological innovation.

[0041] As a preferred embodiment of the above, the outlet of the left bottom area of the absorption tower is communicated with the corresponding sulfurous acid tank through a pipeline.

[0042] As a preferred embodiment of the above, it further comprises a regulating valve 5 and a flowmeter 6, and the acid-making water system is communicated with the right side area of the top end of the secondary absorption tower 4 through a pipeline, and the pipeline is sequentially provided with the flowmeter 6 and the regulating valve 5.

[0043] As a preferred embodiment of the above, it further comprises a control cabinet 7, and the control cabinet 7 is controlled and connected with the corresponding sulfur combustion furnace 1, sulfur storage tank 2, primary absorption tower 3, secondary absorption tower 4, vacuum suction unit matched circulating water pump 8, vacuum suction unit matched circulating tank 9, vacuum suction unit matched circulating water pump 10, vacuum suction unit matched water ejector 11, regulating valve 5 and flowmeter 6.

[0044] In order to explain the possible application scenarios, technical principles, specific implementation schemes, and the purposes and effects of the present application in detail, the following will be described in detail in combination with the specific embodiments listed and the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0045] In this paper, the term "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various places in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0046] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0047] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A system for producing sulfurous acid by using a vacuum absorption unit of process water in a plant, characterized in that, It includes sulfur furnace (1), sulfur tank (2), first absorption tower (3), second absorption tower (4), vacuum absorption unit supporting delivery pump (8), vacuum absorption unit supporting circulating tank (9), vacuum absorption unit supporting circulating water pump (10) and vacuum absorption unit supporting water ejector (11), the flue gas outlet at the top of the sulfur furnace (1) is connected with the right side area at the bottom of the corresponding first absorption tower (3) through pipeline, the corresponding sulfur tank (2) is communicated with the feed inlet of the corresponding sulfur furnace (1), the bottom end of the vacuum absorption unit supporting water ejector (11) is communicated with the left side area at the top end of the corresponding vacuum absorption unit supporting circulating tank (9), the top end of the vacuum absorption unit supporting water ejector (11) is communicated with one side of the corresponding vacuum absorption unit supporting circulating water pump (10) through pipeline, the right end top area of the vacuum absorption unit supporting water ejector (11) is communicated with the top middle of the first absorption tower (3) through pipeline, one side of the vacuum absorption unit supporting circulating water pump (10) is communicated with the bottom area of the left end of the corresponding vacuum absorption unit supporting circulating tank (9), the top middle of the vacuum absorption unit supporting circulating tank (9) is communicated with the right side bottom area of the corresponding second absorption tower (4) through pipeline, one side of the vacuum absorption unit supporting delivery pump (8) is communicated with the right side bottom area of the vacuum absorption unit supporting circulating tank (9), one side of the vacuum absorption unit supporting delivery pump (8) is communicated with the right side area at the top end of the first absorption tower (3) through pipeline, the top area of the left end of the vacuum absorption unit supporting circulating tank (9) is communicated with the left end bottom area of the corresponding second absorption tower (4) through pipeline.

2. The system for preparing sulfurous acid using a vacuum absorption unit of process water in a plant according to claim 1, characterized in that, The left side bottom area outlet of the absorption tower is communicated with the corresponding sulfurous acid tank through pipeline.

3. A sulfurous acid preparation system using a workshop process water vacuum absorption unit as described in claim 2, characterized in that, It also includes regulating valve (5) and flow meter (6), and the acid water system is communicated with the right side area at the top end of the corresponding second absorption tower (4) through pipeline, and the pipeline is sequentially provided with flow meter (6) and regulating valve (5).

4. The system for preparing sulfurous acid by using a vacuum absorption unit of process water in a workshop according to claim 3, characterized in that, It also includes control cabinet (7), and the control cabinet (7) is connected with the corresponding sulfur furnace (1), sulfur tank (2), first absorption tower (3), second absorption tower (4), vacuum absorption unit supporting delivery pump (8), vacuum absorption unit supporting circulating tank (9), vacuum absorption unit supporting circulating water pump (10), vacuum absorption unit supporting water ejector (11), regulating valve (5) and flow meter (6).

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