Tail gas treatment device of acid regeneration unit

Abstract

The utility model discloses a tail gas treatment device of an acid regeneration unit. The tail gas treatment device comprises a condenser, a first fan, a washing tower and a mixed gas tower, the input end of the condenser is suitable for tail gas flowing into the acid regeneration unit, and the output end is communicated with the first fan through a pipeline; the air outlet end of the first fan is connected with the washing tower through a pipeline; a gas inlet at the bottom of the mixed gas tower is connected with a gas outlet end pipeline of the washing tower; an unsaturated gas inlet is formed in the upper part of the mixed gas tower; the tail gas of the acid regeneration unit, which enters the mixed gas tower and is treated by the washing tower, can be mixed with unsaturated water vapor input from the unsaturated gas inlet in the mixed gas tower; by means of the arrangement, water vapor of discharged furnace gas is reduced, the visual effect is weakened, the white smoke effect is achieved, condensation waste water is little, meanwhile, power consumption is low, cost is low, and the technical problems that a large amount of circulating cooling water is consumed, a large amount of acid-containing waste water can be generated, and the water treatment burden is increased are solved.

Description

Technical Field

[0001] This utility model relates to the field of acid regeneration technology, and in particular to a tail gas treatment device for an acid regeneration unit. Background Technology

[0002] During acid regeneration unit operation, a large amount of water vapor is emitted from the chimney. When this water vapor condenses, it forms a significant amount of white smoke. While this white smoke has a relatively small environmental impact when emissions meet standards, it does affect people's visual perception. To eliminate or reduce the white smoke, heat exchangers are typically used to cool the flue gas and condense the water vapor. This method consumes a large amount of circulating cooling water and generates substantial amounts of acid-containing wastewater, increasing the burden on water treatment systems. Utility Model Content

[0003] In view of this, this application provides a tail gas treatment device for an acid regeneration unit, which can transport the iron powder gas and other gases from the acid regeneration unit to a chimney, mix them with the emitted gas, and then discharge them, thereby reducing the partial pressure of water vapor in the flue gas and weakening the visual effect of "white smoke".

[0004] According to one aspect of this application, a tail gas treatment device for an acid regeneration unit is provided, comprising a condenser, a first fan, a scrubbing tower, and a mixed gas tower; the input end of the condenser is adapted to handle the tail gas flowing into the acid regeneration unit, and the output end is connected to the first fan via a pipeline; the outlet end of the first fan is connected to the scrubbing tower via a pipeline; the inlet at the bottom of the mixed gas tower is connected to the outlet end of the scrubbing tower via a pipeline, and an unsaturated gas inlet is provided at the top of the mixed gas tower; the tail gas from the acid regeneration unit treated by the scrubbing tower that enters the mixed gas tower can mix with the unsaturated water vapor input through the unsaturated gas inlet in the mixed gas tower.

[0005] In one possible implementation, the gas mixing tower includes a purification tower and a chimney, with the chimney located at the top of the purification tower and connected to it.

[0006] In one possible implementation, the outlet of the scrubbing tower is connected to the bottom of one side of the purification tower, and the unsaturated gas inlets are located on the chimney, near the connection between the chimney and the purification tower, on opposite sides of the chimney and the scrubbing tower, and there are two in number.

[0007] In one possible implementation, a second fan and a third fan are also included, both of which are located on the opposite side of the chimney and the scrubbing tower, and both are connected to the unsaturated gas inlet on the chimney.

[0008] In one possible implementation, the bottom diameter of the chimney is the same as the diameter of the purification tower, while the top diameter of the chimney is different from the diameter of the purification tower.

[0009] In one possible implementation, the chimney is provided with a flange, which is located on the opposite side of the chimney and the scrubbing tower. There are two flanges, namely a first flange and a second flange.

[0010] In one possible implementation, the outlet of the second fan is connected to one end of the first flange, and the outlet of the third fan is connected to one end of the second flange.

[0011] In one possible implementation, the condenser is provided with a cooling water inlet and a cooling water outlet, and a drain outlet is provided on the pipeline between the condenser and the first fan.

[0012] In one possible implementation, the system further includes a roasting furnace, a separator, and a Venturi pre-concentrator; the roasting furnace is located on one side of the separator, and the roasting furnace and the separator are connected by piping; the Venturi pre-concentrator is located on the opposite side of the separator and the roasting furnace, the separator and the Venturi pre-concentrator are connected by piping, and the Venturi pre-concentrator is connected by piping to the condenser.

[0013] In one possible implementation, the second fan is connected to the roasting furnace via a pipeline.

[0014] The beneficial effects of this utility model are as follows: By setting up a condenser, a first fan, a scrubbing tower, and a mixed gas tower; the input end of the condenser is suitable for the tail gas flowing into the acid regeneration unit, and the output end is connected to the first fan through a pipeline. The tail gas generated by the acid regeneration unit enters the condenser, which contains cooling water. The tail gas undergoes heat exchange in the condenser and becomes low-temperature tail gas; the outlet end of the first fan is connected to the scrubbing tower through a pipeline, and the low-temperature tail gas is drawn into the scrubbing tower for absorption and scrubbing by the first fan; the inlet at the bottom of the mixed gas tower is connected to the outlet end of the scrubbing tower through a pipeline, and the tail gas after absorption enters the mixed gas tower. An unsaturated gas inlet is set at the top of the mixed gas tower, and unsaturated gas from the outside enters the mixed gas tower; the tail gas from the acid regeneration unit treated by the scrubbing tower that enters the mixed gas tower can mix with the unsaturated water vapor input from the unsaturated gas inlet in the mixed gas tower, reducing the water vapor in the tail gas; through the above settings, this application reduces the water vapor in the emitted tail gas, weakens the visual effect of "white smoke", and reduces condensate wastewater. Attached Figure Description

[0015] Figure 1 A schematic diagram of the tail gas treatment device of the acid regeneration group according to an embodiment of this application is shown.

[0016] Figure 2 A schematic diagram showing the specific structure of the gas generated by the tail gas treatment device of the acid regeneration group according to an embodiment of this application is shown. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model or simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," "linking," and "hinged" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] like Figure 1As shown, the tail gas treatment device of the acid regeneration unit includes a condenser 100, a first fan 210, a scrubbing tower 300, and a mixing gas tower 400. The input end of the condenser 100 is suitable for the tail gas flowing into the acid regeneration unit, and the output end is connected to the first fan 210 through a pipeline. The outlet end of the first fan 210 is connected to the scrubbing tower 300 through a pipeline. The inlet at the bottom of the mixing gas tower 400 is connected to the outlet end of the scrubbing tower 300 through a pipeline. An unsaturated gas inlet is provided at the top of the mixing gas tower 400. The tail gas of the acid regeneration unit that has been treated by the scrubbing tower 300 and enters the mixing gas tower 400 can mix with the unsaturated water vapor input through the unsaturated gas inlet in the mixing gas tower 400.

[0023] Specifically, the system includes a first fan 210, a condenser 100, a scrubbing tower 300, and a mixing gas tower 400. The condenser 100 contains condensate water. High-temperature furnace gas exchanges heat with the condensate water through the condenser 100 to obtain low-temperature furnace gas. The condenser 100 is located on one side of the first fan 210 and is connected to it by piping. The first fan 210 is located between the condenser 100 and the scrubbing tower 300, and is connected to the scrubbing tower 300 by piping. The low-temperature furnace gas passes through the first fan 210... The gas is drawn into the scrubbing tower 300 by a blower 210. The scrubbing tower 300 absorbs the low-temperature furnace gas. The mixing gas tower 400 is located on one side of the scrubbing tower 300 and is connected to the scrubbing tower 300 by a pipeline. The absorbed furnace gas enters the mixing gas tower 400. The iron powder gas and other gases are all in the mixing gas tower 400. The iron powder gas and other gases in the mixing gas tower 400 are all unsaturated with water vapor, which mixes the furnace gas with the iron powder gas and other gases, reducing the water vapor content of the furnace gas.

[0024] In one possible implementation, the gas mixing tower 400 includes a purification tower 410 and a chimney 420, with the chimney 420 disposed on top of the purification tower 410 and connected to the purification tower 410.

[0025] Specifically, such as Figure 1 As shown, the absorbed furnace gas first enters the purification tower 410 for purification. At this time, the furnace gas mixes with iron powder gas and other gases before being discharged through the chimney 420.

[0026] In one possible implementation, the outlet of the scrubbing tower 300 is connected to the bottom of one side of the purification tower 410, and the unsaturated gas inlet is located on the chimney 420, near the connection between the chimney 420 and the purification tower 410, on the opposite side of the chimney 420 and the scrubbing tower 300, and there are two in number.

[0027] In one possible implementation, a second fan 220 and a third fan 230 are also included, both of which are located on the opposite side of the chimney 420 and the scrubbing tower 300, and both are connected to the unsaturated gas inlet on the chimney 420.

[0028] Specifically, such as Figure 1 As shown, the second fan 220 is used to draw iron powder gas and allow it to enter the mixing gas tower 400. The third fan 230 is used to draw other gases and allow them to enter the mixing gas tower 400. Both the iron powder gas and the other gases are unsaturated with water vapor.

[0029] In one possible implementation, a flange is provided on the chimney 420, and the flange is located on the opposite side of the chimney 420 and the scrubbing tower 300. There are two flanges, namely the first flange 421 and the second flange 422. The air outlet of the second fan 220 is connected to one end of the first flange 421, and the air outlet of the third fan 230 is connected to one end of the second flange 422.

[0030] Specifically, such as Figure 1 As shown, in order to better fix the second fan 220 and the third fan 230, flanges are installed on the chimney 420. There are two flanges, namely the first flange 421 and the second flange 422. The first flange 421 is connected to the second fan 220, and the second flange 422 is connected to the third fan 230. Furthermore, the air outlet of the second fan 220 is connected to one end of the first flange 421, and the air outlet of the third fan 230 is connected to one end of the second flange 422.

[0031] In one possible implementation, a drain outlet is provided on the pipe between the condenser 100 and the first fan 210.

[0032] Specifically, such as Figure 1 As shown, because the high-temperature furnace gas will form acidic wastewater after heat exchange in the condenser 100, a drain outlet is opened on the pipeline between the condenser 100 and the first fan 210 to discharge the acidic wastewater, which can then be reused in the acid regeneration unit.

[0033] In one possible implementation, the system further includes a calcining furnace 500, a separator 600, and a Venturi pre-concentrator 700; the calcining furnace 500 is located on one side of the separator 600, and the calcining furnace 500 and the separator 600 are connected by piping; the Venturi pre-concentrator 700 is located on the opposite side of the separator 600 and the calcining furnace 500, the separator 600 and the Venturi pre-concentrator 700 are connected by piping, and the Venturi pre-concentrator 700 is connected by piping to the condenser 100.

[0034] Specifically, such as Figure 2 As shown, the roasting furnace 500 is suitable for heating pre-concentrated acid. After heating, furnace gas is generated. The high-temperature furnace gas enters the separator 600 through the pipeline. The separator 600 separates the high-temperature furnace gas into particles. The separated high-temperature furnace gas enters the Venturi pre-concentrator 700. The high-temperature furnace gas concentrates the acid in the Venturi pre-concentrator 700. Then the furnace gas enters the condenser 100 for cooling.

[0035] In one possible implementation, the second fan 220 is connected to the roasting furnace 500 via a pipeline.

[0036] Specifically, since iron powder is generated in the calcining furnace 500, the second blower brings air into contact with the iron powder, and then the iron powder gas is transported to the mixing gas tower 400 by the suction of the second blower 220.

[0037] This application comprises a first fan 210, a condenser 100, a scrubbing tower 300, and a mixed gas tower 400. The condenser 100 contains condensate water. High-temperature furnace gas exchanges heat with the condensate water through the condenser 100 to obtain low-temperature furnace gas. The condenser 100 is located on one side of the first fan 210 and is connected to it by a pipeline. The first fan 210 is located between the condenser 100 and the scrubbing tower 300, and is also connected to the scrubbing tower 300 by a pipeline. The low-temperature furnace gas is drawn into the scrubbing tower 300 by the first fan 210, where it is absorbed. The mixed gas tower 400 is configured with… On one side of the scrubbing tower 300, and connected by a pipeline, the absorbed furnace gas enters the mixing gas tower 400. Iron powder gas and other gases are both in the mixing gas tower 400. The iron powder gas and other gases in the mixing gas tower 400 are all unsaturated with water vapor, which mixes the furnace gas with the iron powder gas and other gases, reducing the water vapor in the furnace gas. Through the above settings, this application reduces the water vapor in the discharged furnace gas, weakens the visual effect of white smoke, reduces condensed wastewater, consumes less electricity, and has a lower cost. It solves the technical problem of consuming a large amount of circulating cooling water, generating a large amount of acidic wastewater, and increasing the burden on water treatment.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tail gas treatment device for an acid regeneration unit, characterized in that, Includes condenser, primary fan, scrubbing tower, and mixing gas tower; The condenser input is suitable for the exhaust gas flowing into the acid regeneration unit, and the output is connected to the first fan through a pipeline. The outlet of the first fan is connected to the scrubbing tower via a pipeline; The inlet at the bottom of the gas mixing tower is connected to the outlet pipe of the scrubbing tower, and an unsaturated gas inlet is provided at the top of the gas mixing tower. The tail gas of the acid regeneration unit that has been treated by the scrubbing tower and the unsaturated water vapor input through the unsaturated gas inlet can be mixed in the gas mixing tower.

2. The tail gas treatment device for the acid regeneration unit according to claim 1, characterized in that, The mixed gas tower includes a purification tower and a chimney, with the chimney located at the top of the purification tower and connected to it.

3. The tail gas treatment device for the acid regeneration unit according to claim 2, characterized in that, The outlet of the scrubbing tower is connected to the bottom of one side of the purification tower. The unsaturated gas inlet is located on the chimney, near the connection between the chimney and the purification tower, on the opposite side of the chimney and the scrubbing tower, and there are two in number.

4. The tail gas treatment device for the acid regeneration unit according to claim 3, characterized in that, It also includes a second fan and a third fan, both of which are located on the opposite side of the chimney and the scrubbing tower, and both of which are connected to the unsaturated gas inlet on the chimney.

5. The tail gas treatment device for the acid regeneration unit according to claim 4, characterized in that, The bottom diameter of the chimney is the same as the diameter of the purification tower, but the top diameter of the chimney is different from the diameter of the purification tower.

6. The tail gas treatment device for the acid regeneration unit according to claim 5, characterized in that, The chimney is equipped with flanges, which are located on the opposite side of the chimney and the scrubbing tower. There are two flanges, namely a first flange and a second flange.

7. The tail gas treatment device for the acid regeneration unit according to claim 6, characterized in that, The outlet of the second fan is connected to one end of the first flange, and the outlet of the third fan is connected to one end of the second flange.

8. The tail gas treatment device for the acid regeneration unit according to claim 7, characterized in that, The condenser is provided with a cooling water inlet and a cooling water outlet, and a drain outlet is provided on the pipeline between the condenser and the first fan.

9. The tail gas treatment device for the acid regeneration unit according to claim 8, characterized in that, It also includes a roasting furnace, a separator, and a Venturi pre-concentrator; The roasting furnace is located on one side of the separator, and the roasting furnace and the separator are connected by pipelines. The Venturi pre-concentrator is located on the opposite side of the separator and the calcining furnace. The separator and the Venturi pre-concentrator are connected by pipeline, and the Venturi pre-concentrator is connected by pipeline to the condenser.

10. The tail gas treatment device for the acid regeneration unit according to claim 9, characterized in that, The second blower is connected to the roasting furnace by a pipeline.

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