CN215996187U - Smoke treatment system for yellow phosphorus production - Google Patents
Smoke treatment system for yellow phosphorus production Download PDFInfo
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- CN215996187U CN215996187U CN202122249310.5U CN202122249310U CN215996187U CN 215996187 U CN215996187 U CN 215996187U CN 202122249310 U CN202122249310 U CN 202122249310U CN 215996187 U CN215996187 U CN 215996187U
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Abstract
The utility model belongs to the technical field of clean production, in particular to a flue gas treatment system for yellow phosphorus production; the device comprises a water curtain cabinet, a spray tower and an alkali washing tank, wherein an air inlet pipe is arranged on the side wall of the water curtain cabinet, a first water outlet pipe is arranged at the bottom of the water curtain cabinet, a first air outlet pipe is arranged at the top of the water curtain cabinet, the tail end of the first air outlet pipe extends into the spray tower from the side wall of the spray tower, a second water outlet pipe is arranged at the bottom of the spray tower, a second air outlet pipe is arranged at the top of the spray tower, a first branch pipe and a second branch pipe are arranged at the tail end of the second air outlet pipe, the first branch pipe and the second branch pipe respectively extend into the first alkali washing tank and the second alkali washing tank, and sodium hydroxide solution is arranged in the first alkali washing tank and the second alkali washing tank; can carry out pH monitoring when NaOH solution washes, guarantee the washing effect.
Description
Technical Field
The utility model belongs to the technical field of cleaner production, concretely relates to flue gas processing system is used in yellow phosphorus production.
Background
The production of yellow phosphorus usually adopts an electric furnace method, phosphorus-containing furnace gas enters a condensation tower, phosphorus steam in the condensation furnace gas is changed into liquid yellow phosphorus and enters a phosphorus collecting tank, finished yellow phosphorus is obtained through refining, and the uncondensed furnace gas is yellow phosphorus tail gas.
Washing yellow phosphorus tail gas with water to reduce temperature, removing most of dust and particulate matters in the tail gas, and removing part of H2S and HF; then the mixture is fed into an alkali washing pool to be washed by sodium hydroxide solution with the concentration of 5-15 percent, and H is further absorbed2S、HF、CO2And (3) waiting for acid gas, wherein the main reaction mechanism is as follows:
3SiF4+4H2O—2H2SiF6+SiO2+2H2O；
H2S+2NaOH—Na2S+2H2O；
CO2+2NaOH—Na2 CO2+2H2O；
P4+3H2O+3NaOH—3NaH2PO4+PH3；
HF+ NaOH—NaF+ H2O。
however, in the conventional apparatus, since the concentration of the NaOH solution gradually decreases as the reaction proceeds and the pH gradually decreases to gradually reduce the effect of removing impurities, the concentration of the NaOH solution needs to be maintained when the NaOH solution is washed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a flue gas processing system is used in yellow phosphorus production can carry out the pH monitoring when the washing of NaOH solution, guarantees the washing effect.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the flue gas treatment system for yellow phosphorus production comprises a water curtain cabinet, a spray tower and an alkali washing tank, wherein an air inlet pipe is arranged on the side wall of the water curtain cabinet, a first water outlet pipe is arranged at the bottom of the water curtain cabinet, a first air outlet pipe is arranged at the top of the water curtain cabinet, the tail end of the first air outlet pipe extends into the spray tower from the side wall of the spray tower, a second water outlet pipe is arranged at the bottom of the spray tower, a second air outlet pipe is arranged at the top of the spray tower, a first branch pipe and a second branch pipe are arranged at the tail end of the second air outlet pipe, the first branch pipe and the second branch pipe respectively extend into the first alkali washing tank and the second alkali washing tank, and sodium hydroxide solution is arranged in the first alkali washing tank and the second alkali washing tank;
the air inlet pipe, the first air outlet pipe and the second air outlet pipe are all provided with fans, the first branch pipe is provided with a first electromagnetic valve, the second branch pipe is provided with a second electromagnetic valve,
the side walls of the first alkali washing tank and the second alkali washing tank are respectively provided with an alkali liquor inlet pipe and an alkali liquor outlet pipe, the alkali liquor inlet pipe and the alkali liquor outlet pipe are provided with valves, the tops of the first alkali washing tank and the second alkali washing tank are respectively provided with an exhaust pipe, a first pH sensor is arranged in the first alkali washing tank, a second pH sensor is arranged in the second alkali washing tank, the first pH sensor, the second pH sensor, a first electromagnetic valve, the second electromagnetic valve is connected with an external controller, the controller is connected with an external alarm, the first pH sensor, the second pH sensor, the first electromagnetic valve, the second electromagnetic valve, the controller and the alarm are powered by an external power supply.
Further, the height of the air outlet ends of the first branch pipe and the second branch pipe is lower than the liquid level height of the sodium hydroxide solution.
Furthermore, stirring shafts are arranged in the first alkali washing tank and the second alkali washing tank, stirring blades are arranged on the stirring shafts, the stirring shafts extend out of the tops of the first alkali washing tank and the second alkali washing tank and are connected with stirring motors, the stirring motors are powered by an external power supply, and the stirring shafts in the first alkali washing tank and the second alkali washing tank work independently.
Furthermore, a baffle is arranged in the water curtain cabinet, a sewer pipe is arranged on the front side of the baffle and connected with an external water inlet pipe, and a water outlet hole is formed in the lower surface of the sewer pipe.
Furthermore, the spray tower both sides are provided with the water pipe, and water piping connection outside inlet tube to be provided with atomizer on the water pipe, be provided with the pump on the inlet tube.
Furthermore, a circulating pipe is arranged on the side wall of the spray tower, the tail end of the circulating pipe is connected with a water inlet pipe, and a pump is arranged on the circulating pipe.
Compared with the prior art, the utility model discloses one of following beneficial effect has at least:
1. the utility model is provided with the water curtain cabinet, the spray tower and the alkali washing tank, most of dust and particulate matters in the tail gas can be removed through the water curtain cabinet and the spray tower, and part of H2S and HF can be removed; then the mixture is fed into an alkali washing pool to be washed by sodium hydroxide solution with the concentration of 5-15 percent, and H is further absorbed2S、HF、CO2When the device is used, a sodium hydroxide solution is discharged into the first alkali washing tank and the second alkali washing tank, smoke coming from the air inlet pipe enters the water curtain cabinet and the spray tower to be washed by water, then enters the first alkali washing tank from the second air outlet pipe through the first branch pipe, the first pH sensor detects acidity in the alkali washing process, when the acidity reaches a set lower limit, a signal is transmitted to the controller, the controller enables the first electromagnetic valve to be closed, then the second electromagnetic valve is opened, alkali washing is performed by using the second alkali washing tank, the alarm gives an alarm to remind an operator to change alkali liquor in the alkali washing tank, one of the first alkali washing tank and the second alkali washing tank is used for standby, alkali washing can be performed by using the other alkali washing tank when the acidity of one alkali liquor is increased to the set lower limit, and the washing effect is guaranteed.
2. The height of the air outlet ends of the first branch pipe and the second branch pipe is lower than the liquid level of the sodium hydroxide solution, so that the contact with the alkali liquor can be ensured.
3. Stirring devices are arranged in the first alkali washing tank and the second alkali washing tank, so that the uniformity of alkali liquor can be enhanced.
4. Be provided with the baffle in the cascade cabinet, increase the contact of tail gas and the water that comes in, increase washing effect.
5. Be provided with atomizer in the spray column, can increase the area of contact of tail gas and water, increase treatment effeciency.
6. The side wall of the spray tower is provided with a circulating pipe, the tail end of the circulating pipe is connected with a water inlet pipe, and a pump is arranged on the circulating pipe, so that spray water in the spray tower can be reused in the water curtain cabinet, and water resources are saved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1-water curtain cabinet; 2-a spray tower; 3-alkali washing the pond; 4, an air inlet pipe; 5-a first water outlet pipe; 6-first air outlet pipe, 7-second water outlet pipe, 8-second air outlet pipe, 9-first branch pipe, 10-second branch pipe, 11-first alkali washing tank, 12-second alkali washing tank, 13-alkali liquor inlet pipe, 14-alkali liquor outlet pipe, 15-exhaust pipe, 16-first pH sensor, 17-second pH sensor, 18-stirring shaft, 19-stirring blade, 20-stirring motor, 21-baffle, 22-sewer pipe, 23-water pipe, 24-atomization nozzle and 25-circulation pipe.
Detailed Description
As shown in fig. 1, in order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The flue gas treatment system for yellow phosphorus production comprises a water curtain cabinet 1, a spray tower 2 and an alkaline washing tank 3, wherein a gas inlet pipe 4 is arranged on the side wall of the water curtain cabinet 1, a first water outlet pipe 5 is arranged at the bottom of the water curtain cabinet, a first gas outlet pipe 6 is arranged at the top of the water curtain cabinet, the tail end of the first gas outlet pipe 6 extends into the spray tower 2 from the side wall of the spray tower 2, a second water outlet pipe 7 is arranged at the bottom of the spray tower 2, a second gas outlet pipe 8 is arranged at the top of the spray tower 2, a first branch pipe 9 and a second branch pipe 10 are arranged at the tail end of the second gas outlet pipe 8, the first branch pipe 9 and the second branch pipe 10 respectively extend into a first alkaline washing tank 11 and a second alkaline washing tank 12, and sodium hydroxide solution is arranged in the first alkaline washing tank 11 and the second alkaline washing tank 12;
the air inlet pipe 4, the first air outlet pipe 6 and the second air outlet pipe 7 are all provided with a fan, the first branch pipe 9 is provided with a first electromagnetic valve, the second branch pipe 10 is provided with a second electromagnetic valve,
the side walls of the first alkali washing tank 11 and the second alkali washing tank 12 are respectively provided with an alkali liquor inlet pipe 13 and an alkali liquor outlet pipe 14, valves are arranged on the alkali liquor inlet pipe 13 and the alkali liquor outlet pipe 14, exhaust pipes 15 are arranged at the tops of the first alkali washing tank 11 and the second alkali washing tank 12, a first pH sensor 16 is arranged in the first alkali washing tank 11, a second pH sensor 17 is arranged in the second alkali washing tank 12, a first pH sensor 16, a second pH sensor 17, a first electromagnetic valve and a second electromagnetic valve are connected with an external controller, the controller is connected with an external alarm, the first pH sensor 16, the second pH sensor 17, the first electromagnetic valve and the second electromagnetic valve are powered by an external power supply, most of dust and particulate matters in tail gas can be removed through the water curtain cabinet 1 and the spray tower 2, and part of H can be removed2S and HF; then the mixture is fed into an alkali washing tank 3 to be washed by sodium hydroxide solution with the concentration of 5-15 percent, and H is further absorbed2S、HF、CO2When the device is used, sodium hydroxide solution is discharged into a first alkali washing tank and a second alkali washing tank 3, flue gas entering from an air inlet pipe 4 enters a water curtain cabinet 1 and a spray tower 2 to be washed by water, then enters a first alkali washing tank 11 from a second air outlet pipe 8 through a first branch pipe 9, a first pH sensor 16 detects acidity in the alkali washing process, when the acidity reaches a set lower limit, a signal is transmitted to a controller, the controller prompts a first electromagnetic valve to be closed, then a second electromagnetic valve is opened, the second alkali washing tank 12 is used for alkali washing, an alarm gives an alarm to remind an operator to change alkali liquor of the alkali washing tank with the lowered pH, the first alkali washing tank 11 and the second alkali washing tank 12 are used for spare, when the acidity of one alkali liquor is raised to the set lower limit,and the other alkali washing tank is used for alkali washing, so that the washing effect is ensured.
Example 2
On the basis of the embodiment 1, the height of the gas outlet ends of the first branch pipe 9 and the second branch pipe 10 is lower than the liquid level of the sodium hydroxide solution, so that the contact with the alkali liquor can be ensured.
Example 3
On the basis of embodiment 1, stirring shafts 18 are arranged in the first alkali washing tank 11 and the second alkali washing tank 12, stirring blades 19 are arranged on the stirring shafts 18, the stirring shafts 18 extend out of the tops of the first alkali washing tank 11 and the second alkali washing tank 12 and are connected with a stirring motor 20, the stirring motor 20 is powered by an external power supply, and the stirring shafts 18 in the first alkali washing tank 11 and the second alkali washing tank 12 work independently, so that the uniformity of alkali liquor can be enhanced.
Example 4
On the basis of embodiment 1, be provided with baffle 21 in the cascade cabinet 1, baffle 21 front side is provided with downcomer 22, downcomer 22 and outside inlet tube connected, and downcomer 22 lower surface is provided with the apopore, increases the contact of tail gas that comes in and water, increases the washing effect.
Example 5
On embodiment 1's basis, spray column 2 both sides are provided with water pipe 23, and outside inlet tube is connected to water pipe 23 to be provided with atomizer 24 on the water pipe 23, be provided with the pump on the inlet tube, can increase the area of contact of tail gas and water, increase treatment effeciency.
Example 6
On the basis of embodiment 1, the lateral wall of the spray tower 2 is provided with a circulating pipe 25, the tail end of the circulating pipe 25 is connected with a water inlet pipe, and a pump is arranged on the circulating pipe 25, so that spray water in the spray tower 2 can be reused in the water curtain cabinet, and water resources are saved.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (6)
1. Flue gas processing system is used in yellow phosphorus production which characterized in that: the device comprises a water curtain cabinet (1), a spray tower (2) and an alkaline washing tank (3), wherein an air inlet pipe (4) is arranged on the side wall of the water curtain cabinet (1), a first water outlet pipe (5) is arranged at the bottom of the water curtain cabinet, a first air outlet pipe (6) is arranged at the top of the water curtain cabinet, the tail end of the first air outlet pipe (6) extends into the spray tower (2) from the side wall of the spray tower (2), a second water outlet pipe (7) is arranged at the bottom of the spray tower (2), a second air outlet pipe (8) is arranged at the top of the spray tower (2), a first branch pipe (9) and a second branch pipe (10) are arranged at the tail end of the second air outlet pipe (8), the first branch pipe (9) and the second branch pipe (10) respectively extend into the first alkaline washing tank (11) and the second alkaline washing tank (12), and sodium hydroxide solution is arranged in the first alkaline washing tank (11) and the second alkaline washing tank (12);
a fan is arranged on each of the air inlet pipe (4), the first air outlet pipe (6) and the second air outlet pipe (8), a first electromagnetic valve is arranged on the first branch pipe (9), a second electromagnetic valve is arranged on the second branch pipe (10),
the side walls of the first alkali washing tank (11) and the second alkali washing tank (12) are respectively provided with an alkali liquor inlet pipe (13) and an alkali liquor outlet pipe (14), valves are arranged on the alkali liquor inlet pipe (13) and the alkali liquor outlet pipe (14), the tops of the first alkali washing tank (11) and the second alkali washing tank (12) are respectively provided with an exhaust pipe (15), a first pH sensor (16) is arranged in the first alkali washing tank (11), a second pH sensor (17) is arranged in the second alkali washing tank (12), the first pH sensor (16), the second pH sensor (17), a first electromagnetic valve and a second electromagnetic valve are respectively connected with an external controller, the controller is connected with an external alarm, the first pH sensor (16), the second pH sensor (17), the first electromagnetic valve and the second electromagnetic valve are respectively powered by an external power supply.
2. The flue gas treatment system for yellow phosphorus production according to claim 1, wherein: the height of the air outlet ends of the first branch pipe (9) and the second branch pipe (10) is lower than the liquid level height of the sodium hydroxide solution.
3. The flue gas treatment system for yellow phosphorus production according to claim 1, wherein: stirring shafts (18) are arranged in the first alkali washing tank (11) and the second alkali washing tank (12), stirring blades (19) are arranged on the stirring shafts (18), the stirring shafts (18) extend out of the tops of the first alkali washing tank (11) and the second alkali washing tank (12) to be connected with stirring motors (20), the stirring motors (20) are powered by external power supplies, and the stirring shafts (18) in the first alkali washing tank (11) and the second alkali washing tank (12) work independently.
4. The flue gas treatment system for yellow phosphorus production according to claim 1, wherein: a baffle (21) is arranged in the water curtain cabinet (1), a sewer pipe (22) is arranged on the front side of the baffle (21), the sewer pipe (22) is connected with an external water inlet pipe, and a water outlet hole is formed in the lower surface of the sewer pipe (22).
5. The flue gas treatment system for yellow phosphorus production according to claim 1, wherein: and water pipes (23) are arranged on two sides of the spray tower (2), the water pipes (23) are connected with an external water inlet pipe, an atomizing nozzle (24) is arranged on each water pipe (23), and a pump is arranged on each water inlet pipe.
6. The flue gas treatment system for yellow phosphorus production according to claim 4 or 5, wherein: the side wall of the spray tower (2) is provided with a circulating pipe (25), the tail end of the circulating pipe (25) is connected with a water inlet pipe, and a pump is arranged on the circulating pipe (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122249310.5U CN215996187U (en) | 2021-09-16 | 2021-09-16 | Smoke treatment system for yellow phosphorus production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122249310.5U CN215996187U (en) | 2021-09-16 | 2021-09-16 | Smoke treatment system for yellow phosphorus production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215996187U true CN215996187U (en) | 2022-03-11 |
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ID=80591217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122249310.5U Active CN215996187U (en) | 2021-09-16 | 2021-09-16 | Smoke treatment system for yellow phosphorus production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215996187U (en) |
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2021
- 2021-09-16 CN CN202122249310.5U patent/CN215996187U/en active Active
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