Gas-water separation equipment for flue gas entrained in discharged water for washing and purifying yellow phosphorus tail gas

Abstract

The utility model discloses gas-water separation equipment for flue gas entrained in discharged water for washing and purifying yellow phosphorus tail gas, relates to the technical field of flue gas purification, and solves the technical problem that the existing gas-water separation equipment capable of timely removing alkaline water vapor in the tail gas after the tail gas is subjected to alkaline washing and purification is lacked. The device comprises a fan, a driving piece is installed on the fan, the side, away from the driving piece, of the fan is communicated with a gas outlet of the alkaline washing tower through a gas inlet pipe, a water outlet is formed in the bottom of the fan, and a tail gas outlet is further formed in the fan. The utility model aims to provide a fan with a water outlet at the bottom, so that alkaline water separated from the fan can be conveniently discharged in time, tail gas is discharged from a tail gas outlet, and the purpose of timely removing alkaline water vapor in the tail gas is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of flue gas purification technology, concretely relates to a kind of gas-water separation equipment of yellow phosphorus tail gas washing purification drainage entrainment flue gas. BACKGROUND

[0002] In the process of yellow phosphorus tail gas generated by electric furnace, about 3000 cubic meters of yellow phosphorus tail gas will be generated for every 1 ton of yellow phosphorus produced, which accounts for more than 30% of the comprehensive energy consumption of yellow phosphorus production unit; the tail gas is first collected, which is the first step of the entire tail gas treatment process, and the collected tail gas needs to be purified, and the purification process usually includes two steps of dust removal and acid removal; dust removal is carried out by water washing dust removal, and acid removal is realized by alkali washing acid removal; by adopting reasonable purification method and suitable purifying agent, effective purification of tail gas is ensured under the premise of low purification cost; after the tail gas is washed by alkali washing, the gas contains a large amount of flue gas and water vapor mixture, and the presence of alkali water in the alkali-washed tail gas will accelerate the corrosion of flue gas pipeline equipment in the subsequent tail gas transportation process, and there is currently a lack of a gas-water separation equipment that can remove the alkaline water vapor in the tail gas after alkali washing. SUMMARY

[0003] To solve the above technical problems, the utility model provides a kind of gas-water separation equipment of yellow phosphorus tail gas washing purification drainage entrainment flue gas, water gas is discharged into fan by inlet pipe in alkali washing tower after washing by alkali water, and the driving element on fan provides power to drive the rotation of impeller inside fan, thereby providing centrifugal power to separate flue gas and water; in the process of separation by fan blade rotation, the presence of water can cause mechanical damage to fan components; when fan is running, impeller rotates at high speed inside fan; if a certain amount of water accumulates on impeller, the imbalance of impeller will be caused due to the high density of water; the imbalance of impeller will cause the vibration of fan to intensify, and long-term severe vibration can cause the shaft of impeller to bend, the bearing to wear out, and even cause the impeller to collide with the shell of fan, resulting in serious consequences such as impeller rupture or shell deformation; therefore, water outlet is installed at the bottom of fan to facilitate the timely discharge of alkali water separated inside fan, and tail gas is discharged from tail gas outlet, thereby achieving the purpose of timely removal of alkaline water vapor inside tail gas.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A kind of gas-water separation equipment of yellow phosphorus tail gas washing purification drainage entrainment flue gas, including fan, driving element is installed on the fan, the side of fan away from driving element is communicated with the gas outlet of alkali washing tower by inlet pipe, water outlet is installed at the bottom of fan, and tail gas outlet is also provided on fan.

[0006] Using the above technical solution, the water-laden gas washed with alkaline water in the alkaline scrubbing tower is discharged into the fan through the inlet pipe. The drive components on the fan provide power to drive the impeller inside the fan to rotate, thereby providing centrifugal force. Due to the density difference between water and flue gas, the water is thrown towards the edge of the fan casing, thus separating the flue gas and water. During the separation process of the fan blades rotating, the presence of water can cause mechanical damage to the fan components. When the fan is running, the impeller inside the fan rotates at high speed. If a certain amount of water accumulates on the impeller, due to the higher density of water, it will cause the impeller to become unbalanced. Impeller imbalance will cause the fan to vibrate more intensely. Long-term severe vibration may cause the impeller shaft to bend, the bearing to wear more intensely, and may even cause the impeller to collide with the fan casing, resulting in serious consequences such as impeller breakage or casing deformation. Therefore, a water outlet is installed at the bottom of the fan. Water is deposited at the bottom of the fan under the action of gravity, which facilitates the timely discharge of the alkaline water separated in the fan. The exhaust gas is discharged from the exhaust gas outlet, achieving the purpose of timely removal of alkaline water vapor inside the exhaust gas.

[0007] Preferably, the water outlet is connected to a collection tank via a pipe, and a fifth valve is installed on the pipe connecting the water outlet and the collection tank.

[0008] Using the above technical solution, the alkaline wastewater discharged from the outlet flows directly into the inside of the collection tank, and the fifth valve facilitates the control of the water flow speed and the opening and closing of the pipeline.

[0009] Preferably, the end of the air inlet pipe is connected to the collection tank via a pipe, the inside of the collection tank is filled with sewage for water sealing, and the lower end of the pipe connecting the end of the air inlet pipe to the collection tank is below the liquid level of the water seal.

[0010] Using the above technical solution, a portion of alkaline wastewater will accumulate at the end of the intake pipe and flow directly into the collection tank through the lower end of the pipe. Since the lower end of the pipe is below the water seal level, the gas inside the intake pipe will not leak. In addition, because the alkaline wastewater flows into the collection tank through the pipe below the intake pipe, the amount of wastewater entering the blower is greatly reduced, thus better preventing the adverse effects of wastewater on the blower.

[0011] Preferably, the air intake pipe is connected to the fan via a shock absorber.

[0012] By adopting the above technical solution, a shock-absorbing part is set up to separate the air intake pipe from the vibrating fan, thereby preventing the fan from driving the entire system to vibrate.

[0013] Preferably, the shock-absorbing part is one of an elastic hose or an elastic bellows.

[0014] Preferably, the exhaust gas outlet is located at the top of the fan.

[0015] Adopting the technical scheme, the tail gas rises and is discharged from the tail gas outlet.

[0016] Preferably, the tail gas outlet is communicated with a flue gas system through a pipeline, and a fourth valve is arranged on the pipeline through which the tail gas outlet is communicated with the flue gas system.

[0017] Adopting the technical scheme, the tail gas discharged from the tail gas outlet enters the flue gas system for next processing, and the fourth valve facilitates the control of the flow of the tail gas and the opening and closing.

[0018] As described above, due to adoption of the technical scheme, the utility model has the beneficial effects that:

[0019] 1. The water-containing gas washed by the alkali water in the tower is discharged into the fan through the gas inlet pipe, the driving member on the fan provides power to drive the impeller inside the fan to rotate, thereby providing centrifugal power, since the density of water is different from the density of flue gas, the water is thrown to the edge of the fan shell, so that the flue gas and the water can be separated; in the process of separation by rotation of the fan blade, the presence of water can cause mechanical damage to the fan parts, when the fan is running, the impeller inside the fan rotates at high speed, if a certain amount of water accumulates on the impeller, since the density of water is large, it will cause imbalance of the impeller; the imbalance of the impeller will cause the fan to vibrate more severely, long-term severe vibration can cause the shaft of the impeller to bend, the bearing to wear more severely, and even can cause the impeller to collide with the fan shell, causing the impeller to break or the shell to deform, etc. Therefore, a water outlet is installed at the bottom of the fan, the water is deposited at the bottom of the fan under the action of gravity, so that the alkali water separated in the fan can be discharged in time, and the tail gas is discharged from the tail gas outlet, thereby achieving the purpose of timely removing the alkaline water vapor inside the tail gas.

[0020] 2. A part of the alkaline sewage is accumulated at the end of the gas inlet pipe and directly flows into the collection tank through the pipeline at the lower end, since the lower end of the pipeline is below the liquid level of the water seal, the gas inside the gas inlet pipe will not leak, in addition, since the alkaline sewage flows into the collection tank through the pipeline below the gas inlet pipe, the sewage entering the fan is greatly reduced, thereby better preventing the adverse effects of the sewage on the fan. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be explained by examples and with reference to the drawings, wherein:

[0022] Fig. 1 is the overall connection structure schematic diagram of the gas-water separation equipment of the yellow phosphorus tail gas washing and purification drainage entrained flue gas in the utility model;

[0023] Fig. 2 is the gas-water separation main component structure schematic diagram in the utility model.

[0024] REFERENCE NUMERALS

[0025] 1-electric furnace, 2-collecting cover, 3-alkali washing tower, 4-collecting tank, 5-fan, 6-flue gas system, 7-motor, 8-first valve, 9-second valve, 10-third valve, 11-fourth valve, 12-fifth valve, 13-tail gas outlet, 14-air inlet pipe, 15-damping part. DETAILED DESCRIPTION

[0026] To make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and indicated in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0027] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0028] The following will be combined with the accompanying drawings Figs. 1-2 The utility model will be described in detail.

[0029] A kind of gas-water separation equipment that yellow phosphorus tail gas washing purification drainage entrains flue gas, with reference to the accompanying Fig. 2, including the fan 5, the fan 5 is installed on the driving element, the fan 5 side away from the driving element is communicated with the air outlet of the caustic tower 3 through the air inlet pipe 14, the bottom of the fan 5 is installed with the water outlet, the fan 5 is also provided with the tail gas outlet 13;Caustic tower 3 in the water gas after washing with lye is discharged into the fan 5 through the air inlet pipe 14, the driving element on the fan 5 provides power, drives the impeller inside the fan 5 to rotate, thereby providing centrifugal power, because the density of water and the density of flue gas is different, water is thrown to the edge of the fan 5 shell, so the flue gas and water can be separated;In the process of fan blade rotation separation, the presence of water can cause mechanical damage of the fan 5 parts, when the fan 5 operates, the impeller inside the fan 5 rotates at high speed, if a certain amount of water accumulates on the impeller, because the density of water is larger, it will cause the imbalance of the impeller;The imbalance of the impeller can cause the vibration of the fan 5 to intensify, long time of severe vibration can cause the shaft of the impeller to bend, the bearing to wear, even can make the impeller collide with the shell of the fan 5, cause the impeller to break or the shell to deform and other serious consequences, therefore, the water outlet is installed at the bottom of the fan 5, the water is deposited at the bottom of the fan 5 under the action of gravity, the lye separated out of the fan 5 is discharged in time, and the tail gas is discharged from the tail gas outlet 13, so that the alkaline water vapor in the tail gas is removed in time.

[0030] Wherein, the driving element adopts motor 7, the output end of the motor 7 is fixed with the rotating shaft of the fan 5 impeller;The motor 7 is installed on the platform on the ground.

[0031] In the embodiment, the water outlet is communicated with the collecting tank 4 through the pipeline, the pipeline communicated with the collecting tank 4 is provided with the fifth valve 12;The alkaline sewage discharged from the water outlet directly flows into the inside of the collecting tank 4, and the fifth valve 12 is convenient to control the speed of water flow and the opening and closing of the pipeline.

[0032] In the embodiment, the end of the air inlet pipe 14 is communicated with the collecting tank 4 through the pipeline, the inside of the collecting tank 4 is provided with sewage for water seal, and the lower end of the pipeline communicated with the collecting tank 4 is below the liquid level of the water seal;The end of the air inlet pipe 14 will accumulate a part of the alkaline sewage, which directly flows into the collecting tank 4 through the lower end of the pipeline, and because the lower end of the pipeline is below the liquid level of the water seal, the gas in the air inlet pipe 14 will not leak.

[0033] In the embodiment, the air inlet pipe 14 and the fan 5 are communicated through the damping part 15;By setting the damping part 15, the air inlet pipe 14 is separated from the vibrating fan 5, so as to prevent the fan 5 from causing vibration of the whole system.

[0034] In the embodiment, the damping part 15 adopts elastic hose.

[0035] In the embodiment, the tail gas outlet 13 is arranged at the top end of the fan 5, and the tail gas rises and is discharged from the tail gas outlet 13.

[0036] In the embodiment, the tail gas outlet 13 is communicated with the flue gas system 6 through a pipeline, and a fourth valve 11 is arranged on the pipeline through which the tail gas outlet 13 is communicated with the flue gas system 6; the tail gas discharged from the tail gas outlet 13 enters the flue gas system 6 and is processed in the next step, and the fourth valve 11 is convenient for controlling the flow of the tail gas and turning off.

[0037] In the embodiment, referring to the accompanying drawings, Fig. 1 The whole system further comprises the electric furnace 1 and the collecting cover 2 which are connected through pipelines in sequence, a first valve 8 is arranged on the pipeline through which the electric furnace 1 is connected with the collecting cover 2, the collecting cover 2 is communicated with the caustic tower 3 through a pipeline, and a second valve 9 is arranged on the pipeline through which the collecting cover 2 is communicated with the caustic tower 3.

[0038] In the embodiment, a third valve 10 is arranged on the air inlet pipe 14.

[0039] It should be noted that:

[0040] The above description of disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas-liquid separation device for scrubbing and purifying yellow phosphorus tail gas and removing entrained flue gas in the wastewater, characterized in that, Includes a blower (5), on which a drive unit is installed, and the side of the blower (5) away from the drive unit is connected to the outlet of the alkaline washing tower (3) through an air inlet pipe (14), and a water outlet is installed at the bottom of the blower (5), and a tail gas outlet (13) is also provided on the blower (5).

2. The gas-liquid separation device for washing and purifying yellow phosphorus tail gas and removing entrained flue gas in the drainage, as described in claim 1, is characterized in that, The outlet is connected to a collection tank (4) via a pipe, and a fifth valve (12) is installed on the pipe connecting the outlet and the collection tank (4).

3. The gas-liquid separation device for washing and purifying yellow phosphorus tail gas and removing entrained flue gas in the drainage, as described in claim 2, is characterized in that, The end of the air inlet pipe (14) is connected to the collection tank (4) through a pipe. The collection tank (4) is filled with sewage for water sealing. The lower end of the pipe connecting the end of the air inlet pipe (14) to the collection tank (4) is below the water seal level.

4. The gas-liquid separation device for washing and purifying yellow phosphorus tail gas and removing entrained flue gas in the drainage, as described in claim 1, is characterized in that, The air intake pipe (14) is connected to the fan (5) through a shock absorber (15).

5. The gas-liquid separation device for washing and purifying yellow phosphorus tail gas and removing entrained flue gas in the drainage, as described in claim 4, is characterized in that, The shock-absorbing part (15) is one of an elastic hose or an elastic bellows.

6. The gas-liquid separation device for scrubbing and purifying yellow phosphorus tail gas and removing entrained flue gas in the drainage, as described in claim 1, is characterized in that, The exhaust outlet (13) is located at the top of the fan (5).

7. The gas-liquid separation device for washing and purifying yellow phosphorus tail gas and removing entrained flue gas in the drainage, as described in claim 1, is characterized in that, The exhaust outlet (13) is connected to the flue gas system (6) via a pipe, and a fourth valve (11) is installed on the pipe connecting the exhaust outlet (13) and the flue gas system (6).

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