A device for desulfurization of acid tail gas
The acid gas desulfurization device, which combines a hydrocyclone and a venturi tube, extends the flow path of the tail gas by using a spiral flow channel, reducing the amount of alkali solution to be circulated and sprayed. This solves the problem of high ammonia consumption in ammonia desulfurization and achieves efficient tail gas desulfurization treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PT ESG NEW ENERGY MATERIAL
- Filing Date
- 2024-10-24
- Publication Date
- 2026-07-14
AI Technical Summary
Ammonia desulfurization requires a large amount of ammonia liquid to be circulated and sprayed during the sulfuric acid preparation process, resulting in a large consumption of ammonia liquid.
The system employs a combination of a hydrocyclone and a venturi tube. Initial desulfurization is achieved by spraying alkaline water mist into the intake pipe through the first reaction component. Subsequently, secondary desulfurization is carried out in the spiral flow channel, which extends the exhaust gas flow path and reduces the amount of alkaline solution circulating and spraying.
It effectively reduces the amount of alkaline solution circulating and spraying, lowers ammonia consumption, improves desulfurization efficiency, and simplifies the acid discharge process.
Smart Images
Figure CN224485485U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of exhaust gas treatment technology, and in particular to a desulfurization device for acid production exhaust gas. Background Technology
[0002] During the sulfuric acid preparation process, the generated tail gas contains hazardous substances such as sulfur dioxide, sulfur trioxide, and sulfuric acid mist, which pose serious environmental hazards. Therefore, it is necessary to desulfurize the tail gas.
[0003] Currently, there are many ways to treat sulfuric acid tail gas, such as activated carbon method, dual alkali method, ammonia method, and hydrogen peroxide method. Among them, the ammonia method is favored by many companies because of its high treatment efficiency.
[0004] However, in practical applications, ammonia desulfurization often adopts a multi-stage spray treatment method. Although this method has a high treatment effect, it requires a large amount of ammonia liquid to be circulated and sprayed, resulting in a large consumption of ammonia liquid. Summary of the Invention
[0005] In view of this, it is necessary to provide a desulfurization device for acid production tail gas to solve the problem of large amounts of ammonia liquid needing to be circulated and sprayed in the ammonia desulfurization process, resulting in high ammonia liquid consumption.
[0006] This application provides a desulfurization device for acid production tail gas, including a hydrocyclone, an inlet pipe, a first reaction component, and a second reaction component. A spiral flow channel is formed inside the hydrocyclone, and an inlet, an outlet, and a liquid outlet are also formed that communicate with the spiral flow channel. The outlet is located at the top of the hydrocyclone, and the liquid outlet is located at the bottom of the hydrocyclone. One end of the inlet pipe is connected to the acid production tail gas, and the other end of the inlet pipe is connected to the inlet in a direction tangential to the spiral flow channel. The outlet end of the first reaction component is connected to the inlet pipe and is used to spray alkaline water mist into the inlet pipe. The outlet end of the second reaction component is connected to the spiral flow channel and is used to spray alkaline water mist into the spiral flow channel.
[0007] Furthermore, the air inlet pipe is a venturi tube, and the air outlet of the first reaction component is connected to the negative pressure port of the venturi tube.
[0008] Furthermore, the Venturi tube includes a feed straight pipe, a transition conical pipe, and a discharge straight pipe connected in sequence. The inner diameter of the feed straight pipe is larger than the inner diameter of the discharge straight pipe. The inner diameter of the transition conical pipe gradually expands from the middle to both ends. A negative pressure port is opened on the transition conical pipe. The feed straight pipe is connected to the exhaust gas. The discharge straight pipe is connected to the air inlet of the hydrocyclone along a direction tangential to the hydrocyclone.
[0009] Furthermore, the first reaction assembly includes a negative pressure chamber and a plurality of first spray heads. The transition conical tube passes through the negative pressure chamber and is connected to the negative pressure chamber via a plurality of negative pressure ports arranged circumferentially thereon. The plurality of first spray heads extend into the negative pressure chamber and are evenly arranged circumferentially along the transition conical tube with their spray ends facing the plurality of negative pressure ports respectively.
[0010] Furthermore, the hydrocyclone includes an outer cylinder, an inner cylinder, and a spiral plate. The inner cylinder is coaxially built into the outer cylinder and extends to the top of the outer cylinder. The spiral plate is built into the annular gap formed between the inner cylinder and the outer cylinder and divides the annular gap to form the spiral flow channel. The top of the inner cylinder forms the exhaust port, and the bottom of the outer cylinder forms the liquid outlet.
[0011] Furthermore, the second reaction component is a second spray head installed on top of the hydrocyclone and spraying downwards.
[0012] Furthermore, there are multiple second spray heads, which are arranged sequentially in the spiral flow channel along the vertical direction.
[0013] Furthermore, the second reaction assembly also includes a spray disc built into the inner cylinder for spraying water mist into the inner cylinder.
[0014] Furthermore, the top of the outer cylinder is closed, the bottom of the outer cylinder has a tapered structure that gradually expands upward, and the air inlet of the cyclone is located on the side wall of the top of the outer cylinder.
[0015] Furthermore, the inner cylinder and the spiral plate are at the same height.
[0016] Compared with existing technologies, the first reaction component sprays alkaline water mist into the inlet pipe, mixes with the acid production tail gas, and achieves preliminary desulfurization treatment of the acid production tail gas. Then, it enters the hydrocyclone in a direction tangential to the hydrocyclone and flows along the spiral channel. The second reaction component sprays alkaline water mist into the spiral channel to perform secondary desulfurization treatment of the acid production tail gas. The spiral channel not only extends the flow path of the tail gas to increase the reaction time and reduce the amount of alkaline solution circulated and sprayed per unit time, but also facilitates the collection of the acid solution formed by the reaction into a stream and discharged from the outlet. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall external structure of the acid tail gas desulfurization device provided in the embodiments of this application; Figure 2 A schematic diagram of the overall internal structure of the acid tail gas desulfurization device provided in the embodiments of this application; Figure 3This is a structural diagram showing the connection between the first reaction component and the air inlet pipe in the acid tail gas desulfurization device provided in the embodiments of this application. Detailed Implementation
[0018] The preferred embodiments of this application are described in detail below with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of this application to illustrate the principles of this application, but are not intended to limit the scope of this application.
[0019] like Figure 1-3 As shown in the figure. This application provides a desulfurization device for acid production tail gas, comprising a hydrocyclone 100, an inlet pipe 200, a first reaction assembly 300, and a second reaction assembly 400. A spiral flow channel 130 is formed within the hydrocyclone 100, and an inlet, an outlet 110, and a liquid outlet 120 are also formed connecting the spiral flow channel 130. The outlet 110 is located at the top of the hydrocyclone 100, and the liquid outlet 130 is located at the bottom of the hydrocyclone 100. One end of the inlet pipe 200 is connected to the acid production tail gas, and the other end of the inlet pipe 200 is connected to the inlet along a direction tangential to the spiral flow channel 130. The outlet end of the first reaction assembly 300 is connected to the inlet pipe 200 and is used to spray alkaline water mist into the inlet pipe 200. The outlet end of the second reaction assembly 400 is connected to the spiral flow channel 130 and is used to spray alkaline water mist into the spiral flow channel 130.
[0020] During implementation, the first reaction component 300 sprays alkaline water mist into the inlet pipe 200, where it mixes with the acid production tail gas to achieve preliminary desulfurization treatment of the acid production tail gas. Subsequently, it enters the hydrocyclone 100 in a direction tangential to the hydrocyclone 100 and flows along the spiral channel 130. The second reaction component 400 sprays alkaline water mist into the spiral channel 130 to perform secondary desulfurization treatment on the acid production tail gas. The spiral channel 130 not only extends the flow path of the tail gas to increase the reaction time and reduce the amount of alkaline solution circulated and sprayed per unit time, but also facilitates the collection of the acid solution formed by the reaction into a stream and discharge it from the outlet.
[0021] In this embodiment, a spiral flow channel 130 is formed inside the hydrocyclone 100, and an air inlet, an exhaust outlet 110 and a liquid outlet 120 are also formed that connect the spiral flow channel 130. The exhaust outlet 110 is located at the top of the hydrocyclone 100, and the liquid outlet 130 is located at the bottom of the hydrocyclone 100.
[0022] To facilitate the formation of the hydrocyclone 100 with the above-described structure, in one embodiment, the hydrocyclone 100 includes an outer cylinder 140, an inner cylinder 150, and a spiral plate 160. The inner cylinder 150 is coaxially built into the outer cylinder 140 and extends to the top of the outer cylinder 140. The spiral plate 160 is built into the annular gap formed between the inner cylinder 150 and the outer cylinder 140 and divides the annular gap to form a spiral flow channel 130. The top of the inner cylinder 150 forms an exhaust port 110, and the bottom of the outer cylinder 140 forms a liquid outlet.
[0023] In this embodiment, the top of the outer cylinder 140 is closed, and the bottom of the outer cylinder 140 has a tapered structure that gradually expands upward. The air inlet of the cyclone separator 100 is located on the side wall of the top of the outer cylinder 140.
[0024] To maximize the flow path of the exhaust gas within the spiral channel 130, in one embodiment, the inner cylinder 150 and the spiral plate 160 are at the same height. This can also be achieved by controlling the pitch of the spiral plate 160.
[0025] The exhaust port 110 and the liquid outlet 120 are respectively equipped with an exhaust pipe and a liquid outlet pipe. A demister 111 is installed on the exhaust pipe, and an acid recovery pipe 121 is connected to the bottom of the liquid outlet pipe.
[0026] In this embodiment, one end of the air inlet pipe 200 is connected to the acid production tail gas, and the other end of the air inlet pipe 200 is connected to the air inlet of the hydrocyclone 100 in a direction tangential to the hydrocyclone 100.
[0027] In one embodiment, the intake pipe 200 is a venturi tube, and the outlet end of the first reaction assembly 300 is connected to the negative pressure port 221 of the venturi tube. The venturi tube can accelerate the treatment of the exhaust gas, and the negative pressure generated at the negative pressure port 221 is used to adsorb the alkaline spray sent from the outlet end of the first reaction assembly 300.
[0028] In this embodiment, the Venturi tube includes a feed straight pipe 210, a transition tapered pipe 220, and a discharge straight pipe 230 connected in sequence. The inner diameter of the feed straight pipe 210 is larger than that of the discharge straight pipe 230. The inner diameter of the transition tapered pipe 220 gradually expands from the middle to both ends. A negative pressure port 221 is provided on the transition tapered pipe 220. The feed straight pipe 210 is connected to the exhaust gas, and the discharge straight pipe 230 is connected to the air inlet of the hydrocyclone 100 along a direction tangential to the hydrocyclone 100.
[0029] Specifically, the first reaction component 300 sprays a small amount of alkaline water mist, which is then drawn into the intake pipe 200 under the negative pressure of the negative pressure port 221 to react with the exhaust gas.
[0030] In this embodiment, the outlet of the first reaction component 300 is connected to the inlet pipe 200 and is used to spray alkaline water mist into the inlet pipe 200.
[0031] In one embodiment, the first reaction assembly 300 includes a negative pressure chamber 310 and a plurality of first spray heads 320. A transition tapered tube 220 is disposed through the negative pressure chamber 310 and is connected to the negative pressure chamber 310 via a plurality of negative pressure ports 221 disposed around its periphery. The plurality of first spray heads 320 extend into the negative pressure chamber 310 and are evenly arranged around the transition tapered tube 220 with their spray ends facing the plurality of negative pressure ports 221 respectively.
[0032] The second reaction component 400 in this embodiment has its outlet end connected to the spiral channel 130 and is used to spray alkaline water mist into the spiral channel 130.
[0033] In one embodiment, the second reaction component 400 is a second spray head mounted on top of the hydrocyclone 100 and spraying downwards.
[0034] In this embodiment, there are multiple second spray heads, which are arranged sequentially in the spiral flow channel 130 along the vertical direction. The spray volume of the multiple second spray heads can be gradually reduced in the vertical downward direction to adapt to the actual needs of tail gas desulfurization treatment.
[0035] When the alkali solution is ammonia water, since ammonia water is volatile, in order to prevent ammonia gas from escaping from the exhaust port 110, the second reaction component 400 in this embodiment also includes a spray plate built into the inner cylinder 150 and used to spray water mist into the inner cylinder 150.
[0036] Compared with existing technologies: The first reaction component 300 sprays alkaline water mist into the inlet pipe 200, mixes with the acid production tail gas, and achieves preliminary desulfurization treatment of the acid production tail gas. Then, it enters the hydrocyclone 100 in a direction tangential to the hydrocyclone 100 and flows along the spiral channel 130. The second reaction component 400 sprays alkaline water mist into the spiral channel 130 to perform secondary desulfurization treatment on the acid production tail gas. The spiral channel 130 not only extends the flow path of the tail gas to increase the reaction time and reduce the amount of alkaline solution circulated and sprayed per unit time, but also facilitates the collection of the acid solution formed by the reaction into a stream and discharged from the outlet.
[0037] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.
Claims
1. A desulfurization device for acid production tail gas, characterized in that, include: A hydrocyclone has a spiral flow channel formed inside it, and also has an air inlet, an exhaust outlet and a liquid outlet that communicate with the spiral flow channel. The exhaust outlet is located at the top of the hydrocyclone and the liquid outlet is located at the bottom of the hydrocyclone. An air inlet pipe, one end of which is connected to acid production tail gas, and the other end of the air inlet pipe is connected to the air inlet along a direction tangential to the spiral flow channel. The first reaction component has its outlet end connected to the inlet pipe and is used to spray alkaline water mist into the inlet pipe. The second reaction component has its outlet connected to the spiral flow channel and is used to spray alkaline water mist into the spiral flow channel.
2. The acid tail gas desulfurization device according to claim 1, characterized in that, The air inlet pipe is a venturi tube, and the air outlet of the first reaction component is connected to the negative pressure port of the venturi tube.
3. The acid tail gas desulfurization device according to claim 2, characterized in that, The venturi tube includes a feed straight pipe, a transition conical pipe and a discharge straight pipe connected in sequence. The inner diameter of the feed straight pipe is larger than the inner diameter of the discharge straight pipe. The inner diameter of the transition conical pipe gradually expands from the middle to both ends. A negative pressure port is opened on the transition conical pipe. The feed straight pipe is connected to the exhaust gas. The discharge straight pipe is connected to the air inlet of the hydrocyclone along a direction tangent to the hydrocyclone.
4. The acid tail gas desulfurization device according to claim 3, characterized in that, The first reaction assembly includes a negative pressure chamber and a plurality of first spray heads. The transition conical tube passes through the negative pressure chamber and is connected to the negative pressure chamber via a plurality of negative pressure ports arranged circumferentially thereon. The plurality of first spray heads extend into the negative pressure chamber and are evenly arranged circumferentially along the transition conical tube with their spray ends facing the plurality of negative pressure ports respectively.
5. The acid tail gas desulfurization device according to claim 1, characterized in that, The hydrocyclone includes an outer cylinder, an inner cylinder, and a spiral plate. The inner cylinder is coaxially built into the outer cylinder and extends to the top of the outer cylinder. The spiral plate is built into the annular gap formed between the inner cylinder and the outer cylinder and divides the annular gap to form the spiral flow channel. The top of the inner cylinder forms the exhaust port, and the bottom of the outer cylinder forms the liquid outlet.
6. The acid tail gas desulfurization device according to claim 5, characterized in that, The second reaction component is a second spray head installed on top of the hydrocyclone and spraying downwards.
7. The acid tail gas desulfurization device according to claim 6, characterized in that, The number of second spray heads is multiple, and the multiple second spray heads are arranged sequentially in the spiral flow channel along the vertical direction.
8. The acid tail gas desulfurization device according to claim 6, characterized in that, The second reaction assembly also includes a spray disc built into the inner cylinder for spraying water mist into the inner cylinder.
9. The acid tail gas desulfurization device according to claim 5, characterized in that, The top of the outer cylinder is closed, and the bottom of the outer cylinder has a tapered structure that gradually expands upward. The air inlet of the cyclone is located on the side wall of the top of the outer cylinder.
10. The acid tail gas desulfurization device according to claim 5, characterized in that, The inner cylinder and the spiral plate are at the same height.