Desulfurizing tower

Abstract

The utility model relates to a desulfurizing tower and belongs to the technical field of wet desulphurization. The desulfurization tower comprises a tower body; the spraying device is arranged at the top end of the tower body; the water storage tank is arranged at the bottom end of the tower body; the rotational flow device is located at the top of the water storage tank, the rotational flow device comprises a shell and a plurality of channels penetrating through the upper surface and the lower surface of the shell, the channels are spirally distributed and incline to the upper surface and the lower surface of the shell, and the desulfurizing agent sprayed by the spraying device enters the water storage tank through the channels. According to the utility model, the hardening phenomenon can be avoided, the structural complexity of the desulfurizing tower is reduced, the integrity of solid particles in a desulfurizing agent is ensured, and excessive refining is avoided, so that the recycling of the desulfurizing agent is facilitated, and the energy consumption and the cost are reduced.

Description

Technical Field

[0001] The utility model relates to a desulfurization tower and belongs to the technical field of wet desulfurization. Background Art

[0002] Wet desulfurization technology is a desulfurization method used in the process of industrial flue gas purification. It mainly brings the flue gas into close contact with the desulfurizer, causing the sulfur dioxide in the flue gas to react chemically with the desulfurizer to generate sulfate insoluble substances, thereby removing sulfur dioxide from the flue gas and achieving the purpose of desulfurization.

[0003] In the process of wet flue gas desulfurization, the water storage tank of the desulfurization tower is a key component. It is not only used to collect the desulfurizer for recycling, but also serves as the precipitation area for the reaction products. However, since the desulfurizer after the reaction contains a large amount of solid particles (limestone or lime particles in the desulfurizer) and chemical precipitates (sulfate insoluble substances), the water storage tank is prone to hardening, that is, the precipitates accumulate at the bottom of the tank and gradually harden, forming a block of material that is difficult to remove. This will not only reduce the effective volume of the water storage tank, but also cause obstruction of liquid flow. In severe cases, it may even cause blockage of the entire desulfurization system, affecting the desulfurization efficiency and the normal operation of the equipment.

[0004] In order to solve the problem of hardening, existing desulfurization tower technology is usually equipped with a stirring device, which promotes the flow of liquid by stirring in the water tank, so that solid particles and chemical precipitates are suspended to prevent the accumulation and hardening of precipitates. Although this method can alleviate the hardening phenomenon to a certain extent, the operation of the stirring device will increase the energy consumption of the system, and excessive stirring may cause the solid particles in the desulfurizer to be overly refined, thereby affecting the precipitation effect and desulfurization efficiency. In addition, the long-term operation of the stirring device may also lead to equipment wear and increase maintenance costs, thereby bringing additional economic burdens to the operation of the desulfurization tower. Utility Model Content

[0005] The utility model aims to provide a desulfurization tower, which not only improves the desulfurization efficiency but also reduces energy consumption and reduces costs.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a desulfurization tower, comprising:

[0007] tower body;

[0008] A spray device is arranged at the top of the tower body;

[0009] A water storage tank is arranged at the bottom end of the tower body; and

[0010] The cyclone device is located at the top of the water storage tank. The cyclone device includes a shell and a plurality of channels penetrating the upper and lower surfaces of the shell. The channels are distributed in a spiral shape and are inclined to the upper and lower surfaces of the shell. The desulfurizer sprayed by the spray device enters the water storage tank through the channels.

[0011] Furthermore, the tower body comprises an air inlet and an air outlet, one of which is formed at the top of the tower body, and the other is formed on the side wall of the tower body.

[0012] Furthermore, the air inlet is connected to a blower.

[0013] Furthermore, the desulfurization tower also includes a circulation device connecting the spraying device and the water storage tank, and the circulation device transports the desulfurizer in the water storage tank to the spraying device.

[0014] Furthermore, the tower body includes a sewage outlet and a liquid outlet formed at the bottom end of the tower body, the sewage outlet and the liquid outlet are both connected to the water storage tank, and the circulation device is connected to the liquid outlet.

[0015] Furthermore, the desulfurization tower also includes a packing layer arranged between the cyclone device and the spray device.

[0016] Furthermore, the spray device includes a plurality of nozzles arranged on the tower body, and the nozzles are evenly distributed along the height direction of the tower body.

[0017] Furthermore, the desulfurization tower also includes a demister arranged at the top of the tower body.

[0018] The beneficial effect of the utility model is that the utility model sets an inclined spiral distribution channel so that the desulfurizer can form a vortex and rotate slightly after passing through the channel into the water storage tank, thereby promoting the flow of the desulfurizer and avoiding the occurrence of the caking phenomenon. At the same time, since no electric stirring device is used, the structural complexity of the desulfurization tower is reduced, and the energy consumption and cost are reduced. In addition, the desulfurizer only rotates slightly, thereby ensuring the integrity of the solid particles in the desulfurizer, avoiding excessive refinement, facilitating the recycling of the desulfurizer, and further reducing the cost.

[0019] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a desulfurization tower shown in an embodiment of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the structure of the mid-cyclone device. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it 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 indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] See also Figure 1 and Figure 2 The desulfurization tower 100 shown in a preferred embodiment of the present application includes a tower body 1, a spray device 2, a water storage tank 3 and a cyclone device 4.

[0026] The spray device 2 is arranged at the top of the tower body 1, and sprays the desulfurizer in the form of water mist into the flue gas passing through the tower body, thereby increasing the contact area between the desulfurizer and the flue gas to achieve efficient gas-liquid contact and absorption of sulfur dioxide.

[0027] The spray device 2 includes a plurality of nozzles 21 disposed on the tower body 1, and the nozzles 21 are evenly distributed along the height direction of the tower body 1. The plurality of nozzles 21 can form a continuous and uniform desulfurization agent atomization layer (unnumbered) inside the tower body 1 through spraying, so that the flue gas can be fully mixed and reacted with the fine desulfurization agent droplets when passing through this area. It should be noted that the spray speed, spray angle and distance between the nozzles can be adjusted according to the concentration of sulfur dioxide in the flue gas to optimize the reaction efficiency and reduce the consumption of the desulfurization agent. This adjustment method is relatively common in the prior art and will not be described in detail here.

[0028] The water storage tank 3 is arranged at the bottom of the tower body 1, and is used to collect the desulfurization agent and chemical precipitates (ie, sulfate insolubles) falling from the upper part of the tower body 1 after the desulfurization reaction.

[0029] The cyclone device 4 is located at the top of the water storage tank 3. The cyclone device 4 includes a shell 41 and a plurality of channels 42 penetrating the upper and lower surfaces of the shell 41. The channels 42 are spirally distributed and inclined to the upper and lower surfaces of the shell 41. The desulfurizer sprayed by the spray device 2 enters the water storage tank 3 through the channels 42. In actual production, the cyclone device 4 is integrally formed to directly form a shell 41 including a plurality of channels 42. As for the number and inclination angle of the channels 42, they can be adjusted according to actual conditions and will not be described in detail here. However, it is necessary to ensure that the desulfurizer can rotate slightly in the water storage tank 3 after passing through the cyclone device 4, so that the chemical precipitate is not easy to be hardened.

[0030] Thus, on the one hand, the uniformity of gas-liquid mixing is promoted by the rotational flow, thereby enhancing the contact efficiency between the desulfurizer and the unreacted sulfur dioxide in the flue gas. On the other hand, after passing through the cyclone device, the desulfurizer will rotate slightly in the water storage tank, so that the chemical precipitate is suspended in the water, avoiding the caking phenomenon, reducing the maintenance frequency of the desulfurization tower 100, and reducing the cost.

[0031] Furthermore, in order to realize the recycling of the desulfurizer, the desulfurization tower 100 further includes a circulation device 5 connected to the spray device 2 and the water storage tank 3, and the circulation device 5 transports the desulfurizer in the water storage tank 3 to the spray device 2. A filter plate (not shown) is provided at the connection between the circulation device 5 and the water storage tank 3, and solid particles (i.e., limestone or lime particles in the desulfurizer) can freely pass through the filter plate, while chemical precipitates with a large volume cannot pass through the filter plate, thereby effectively utilizing the unreacted solid particles in the desulfurizer, improving resource efficiency, and preventing chemical precipitates with a large volume from re-entering the cycle and causing blockage.

[0032] In this embodiment, a sewage outlet 13 and a liquid outlet 14 are formed at the bottom of the tower body 1, and both the sewage outlet 13 and the liquid outlet 14 are connected to the water storage tank 3, and the circulation device 5 is connected to the liquid outlet 14. The sewage outlet 13 is used to discharge the sediment accumulated in the water storage tank 3 that cannot be recycled regularly or when needed, so as to ensure the cleanliness and effective operation of the water storage tank 3. The liquid outlet 14 is used to guide the filtered desulfurizer out of the water storage tank 3 and through the circulation device 5 connected thereto, so that the desulfurizer can be recycled.

[0033] The tower body 1 also includes an air inlet 11 and an air outlet 12, one of which is formed at the top of the tower body 1 and the other is formed at the side wall of the tower body 1, and the air inlet 11 is connected to a blower (not shown), which provides power to control the flow rate of the flue gas, thereby controlling the desulfurization rate, making the desulfurization reaction more complete, and ultimately achieving a better desulfurization effect.

[0034] In this embodiment, the air inlet 11 is formed at the top of the tower body 1, and the air outlet 12 is formed at the side wall of the tower body 1, and the flue gas flow direction is the same as the flow direction of the desulfurizer. During the desulfurization process, most of the treated flue gas will be discharged from the desulfurization tower 100 from the air outlet 12 on the side wall along the flow direction, however, a part of the flue gas will continue to move downward with the desulfurizer. When this part of the flue gas enters the water storage tank 3 together with the desulfurizer, they will pass through the cyclone device 4 located at the top of the water storage tank 3, thereby generating a rotating flow. This rotating flow not only helps to further promote gas-liquid mixing and improve desulfurization efficiency, but also can increase the rotation intensity of the desulfurizer in the water storage tank 3, and further prevent chemical precipitates from being deposited in the water storage tank 3.

[0035] In another embodiment, the air inlet 11 is formed on the side wall of the tower body 1, and the air outlet 12 is formed on the top of the tower body 1. The flue gas flow direction is opposite to the desulfurizer flow direction, so as to achieve longer contact between the flue gas and the desulfurizer, which helps to improve the absorption capacity of the desulfurizer. In addition, since the flue gas continuously encounters fresh or less reactive desulfurizer during the rising process in the desulfurization tower 100, it helps to maintain a high desulfurization efficiency in the entire desulfurization tower 100. This countercurrent design method is relatively common in the prior art and will not be described in detail here.

[0036] In this embodiment, the desulfurization tower 100 further includes a packing layer 6 disposed between the cyclone device 4 and the spray device 2, which is used to increase the contact area between the flue gas and the desulfurizer and improve the desulfurization efficiency. The packing layer 6 not only prolongs the contact time between the flue gas and the desulfurizer, but also increases the turbulence between the gas and the liquid, thereby improving the desulfurization efficiency. The structure of the packing layer 6 is relatively common in the prior art and will not be described in detail here.

[0037] Furthermore, the desulfurization tower 100 also includes a demister 7 disposed at the top of the tower body 1, which is used to control and reduce the discharge of water mist in the flue gas during the desulfurization process, thereby ensuring the dryness and cleanliness of the flue gas. The demister 7 not only helps to meet environmental emission standards, but also avoids corrosion problems to other equipment, thereby improving the stability and reliability of the entire system. The structure of the demister 7 is relatively common in the prior art and will not be described in detail here.

[0038] The present application provides an inclined spirally distributed channel 42 so that the desulfurizer can form a vortex and rotate slightly after passing through the channel 42 and entering the water storage tank 3, thereby promoting the flow of the desulfurizer and avoiding the occurrence of the caking phenomenon. At the same time, since no electric stirring device is used, the structural complexity of the desulfurization tower is reduced, and the energy consumption and cost are reduced. In addition, the desulfurizer only rotates slightly, thereby ensuring the integrity of the solid particles in the desulfurizer, avoiding excessive refinement, facilitating the recycling of the desulfurizer, and further reducing the cost.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A desulfurization tower, characterized in that: include: tower body; A spray device is arranged at the top of the tower body; A water storage tank is arranged at the bottom end of the tower body; and The cyclone device is located at the top of the water storage tank. The cyclone device includes a shell and a plurality of channels penetrating the upper and lower surfaces of the shell. The channels are distributed in a spiral shape and are inclined to the upper and lower surfaces of the shell. The desulfurizer sprayed by the spray device enters the water storage tank through the channels.

2. The desulfurization tower according to claim 1, characterized in that: The tower body comprises an air inlet and an air outlet, one of which is formed at the top of the tower body and the other is formed at the side wall of the tower body.

3. The desulfurization tower according to claim 2, characterized in that: The air inlet is connected to the blower.

4. The desulfurization tower according to claim 1, characterized in that: The desulfurization tower also includes a circulation device connecting the spraying device and the water storage tank, and the circulation device transports the desulfurizer in the water storage tank to the spraying device.

5. The desulfurization tower according to claim 4, characterized in that: The tower body comprises a sewage outlet and a liquid outlet formed at the bottom end of the tower body, the sewage outlet and the liquid outlet are both connected to the water storage tank, and the circulation device is connected to the liquid outlet.

6. The desulfurization tower according to claim 1, characterized in that: The desulfurization tower also includes a packing layer arranged between the cyclone device and the spray device.

7. The desulfurization tower according to claim 1, characterized in that: The spray device comprises a plurality of nozzles arranged on the tower body, and the nozzles are evenly distributed along the height direction of the tower body.

8. The desulfurization tower according to claim 1, characterized in that: The desulfurization tower also includes a demister arranged at the top of the tower body.

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