CN217103762U - Blast furnace gas desulfurization and dechlorination device - Google Patents
Blast furnace gas desulfurization and dechlorination device Download PDFInfo
- Publication number
- CN217103762U CN217103762U CN202220694986.7U CN202220694986U CN217103762U CN 217103762 U CN217103762 U CN 217103762U CN 202220694986 U CN202220694986 U CN 202220694986U CN 217103762 U CN217103762 U CN 217103762U
- Authority
- CN
- China
- Prior art keywords
- tank
- blast furnace
- alkali
- furnace gas
- gas desulfurization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a blast furnace gas desulfurization and dechlorination device, which comprises a cleaning tower, a recovery tank and a sedimentation tank, wherein the cleaning tower comprises a collecting tank, an alkali spraying area and a dehydration area which are arranged from bottom to top in sequence; the water inlet of the recovery tank is connected with the water outlet of the collection tank, and the recovery tank is used for adjusting the pH of the waste liquid flowing out of the collection tank; the water inlet of the sedimentation tank is connected with the water outlet of the recovery tank, and the waste liquid is sent into the sedimentation tank for sedimentation after the pH value of the waste liquid is adjusted by the recovery tank; the utility model discloses a washing tower gets rid of impurity such as hydrogen sulfide, hydrogen chloride in the coal gas, and the cooling water after the use is collected and is handled to recycle improves water resource utilization rate.
Description
Technical Field
The utility model belongs to the technical field of blast furnace gas desulfurization technique and specifically relates to a blast furnace gas desulfurization dechlorination device.
Background
Blast furnace gas is a byproduct generated in the steel manufacturing process and is one of important energy sources of steel enterprises. The untreated gas contains a large amount of hydrogen sulfide H 2 S, carbonyl sulfide COS, carbon disulfide CS 2 And HCl, and dissolving in condensed water to form S 2- 、SO 3 2- 、SO 4 2- 、Cl - Ions form an acidic solution, which can cause corrosion of pipelines and equipment, so that the wall thickness of a blast furnace gas pipeline is reduced, and sand hole leakage is easily formed; the impurity content in the coal gas is high, so that the nozzle of a combustion chamber of downstream user equipment such as a blast furnace hot blast stove and the like is scaled and blocked, and the maintenance cost and the use cost of the equipment are increased. Therefore, the method is necessary for the desulfurization and dechlorination of the blast furnace gas in order to prevent the corrosion of a pipe network, the failure of equipment and the leakage of the gas.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model solves the above problems, and provides a blast furnace gas desulfurization and dechlorination device, adopts the washing tower to get rid of impurities such as hydrogen sulfide, hydrogen chloride in the coal gas, and the cooling water after the use is collected and is handled to recycle improves water resource utilization rate.
In order to achieve the above purpose, the technical scheme of the utility model is that: a blast furnace gas desulfurization and dechlorination device comprises a cleaning tower, a recovery tank and a sedimentation tank, wherein the cleaning tower comprises a collecting tank, an alkali spraying area and a dehydration area which are sequentially arranged from bottom to top; the water inlet of the recovery tank is connected with the water outlet of the collection tank, the recovery tank is provided with a NaOH dosing device, the pH of the waste liquid flowing out of the collection tank is adjusted to be about neutral, and corrosion and damage to subsequent pipelines during waste liquid transportation are prevented; the water inlet of the sedimentation tank is connected with the water outlet of the recovery tank, the waste liquid is adjusted in pH by the recovery tank and then is sent into the sedimentation tank for sedimentation, the sedimentation tank is provided with a PAM dosing device, and small particles in the waste water are coagulated into larger particles for sedimentation in the sedimentation tank.
The improved wastewater treatment device is further improved by comprising an alkaline liquid pool, wherein a water inlet of the alkaline liquid pool is connected with a water outlet of the sedimentation tank, and supernatant liquid precipitated in the sedimentation tank is conveyed to the alkaline liquid pool through a wastewater lifting pump for recycling. The alkaline liquid pool is provided with an alkaline dosing device, and the pH of water entering the alkaline liquid pool from the sedimentation pool is adjusted to 7-8 so as to improve the adsorption efficiency of the alkali spraying area on sulfur-containing and chlorine-containing substances in the coal gas; the water outlet of the alkaline solution pool is connected with an alkaline spraying area of the cleaning tower to provide alkaline solution for the alkaline spraying area.
Furthermore, when the water quality condition of the supernatant in the sedimentation tank is good and the pH value is 7-8, the supernatant can be directly sent to an alkali spraying area of the cleaning tower for recycling through a wastewater lifting pump without passing through an alkali liquor tank.
And a filtering device is arranged between the alkali liquor pool and the sedimentation pool and is used for filtering impurities.
The improved alkali spraying area is provided with an annular main pipe, a plurality of nozzles are uniformly distributed on the main pipe, the nozzles are connected with an alkali liquor pool and a compressed air tank, alkali liquor and compressed air are uniformly mixed and then sprayed out, and the sulfur-containing and chlorine-containing coal gas entering the cleaning tower from the air inlet is subjected to alkali washing.
Still further, the alkali spraying area is also provided with a temperature, pressure and pH detection device for carrying out feedback adjustment on the alkali spraying device.
In a further improvement, the dehydration area is a dehydration filler section and is used for condensing and removing water vapor in the gas after the alkali washing.
In a further improvement, a circulating water pipeline is also arranged in the washing tower and is positioned between the alkali spraying area and the dewatering area and used for carrying out secondary cooling on the coal gas after alkali washing.
Further improve, be equipped with a drainage chute between recovery pond and the sedimentation tank, the drainage chute is equipped with PAC charge device for less particulate matter flocculation and precipitation in the waste water.
The gas outlet is further improved, and a fan is arranged at the position of the gas outlet, so that the temperature of the coal gas is reduced.
The cleaning tower is of an all-steel structure, and the tower is provided with an access hole which is convenient to overhaul.
In a further improvement, the sludge generated by the sedimentation tank is discharged by arranging a sludge discharge pipe, and a sludge treatment system is preferably arranged on the sedimentation tank.
Through the utility model provides a technical scheme has following beneficial effect:
1. the waste liquid generated by spraying alkali to the washing tower is recycled after being treated, so that water resources are saved.
2. Acidic substances and chlorides in the coal gas are treated, so that the corrosion reaction speed of the coal gas conveying metal pipeline is reduced, and the service life of the pipeline is prolonged.
3. The sulfide in the coal gas is treated, and the environmental pollution is reduced.
4. And impurities in the coal gas are cleaned, so that the scaling of the pipeline is reduced.
5. The cleaning tower adopts an all-steel structure, and is assembled on site, so that the difficulty of on-site civil engineering and construction is reduced.
Drawings
FIG. 1 is a general schematic view of the present invention;
fig. 2 is a schematic view of the structure of the cleaning tower of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, a blast furnace gas desulfurization and dechlorination device includes an alkaline solution tank 1, a washing tower 2, a recovery tank 3 and a sedimentation tank 4. The washing tower 2 comprises a collecting tank 21, an alkali spraying area 22 and a dehydration area 23 which are sequentially arranged from bottom to top, an air inlet 24 is arranged below the side of the washing tower 2, the air inlet 24 is positioned between the collecting tank 21 and the alkali spraying area 22, an air outlet 25 is arranged at the top of the washing tower 2, and the air outlet 25 is connected with a downstream user or a gas tank.
A water inlet of the recovery tank 3 is connected with a water outlet of the collection tank 21, the recovery tank 3 is provided with a NaOH dosing device 31, and the pH of the waste liquid flowing out of the collection tank 21 is adjusted; the water inlet of the sedimentation tank 4 is connected with the water outlet of the recovery tank 3, and the waste liquid is sent into the sedimentation tank 4 for sedimentation after the pH value of the waste liquid is adjusted by the recovery tank 3. In this embodiment, the sedimentation tank 4 is an inclined plate sedimentation tank. A water inlet of the alkali liquor pool 1 is connected with a water outlet of the sedimentation pool 4, and supernatant liquid precipitated in the sedimentation pool 4 is sent to the alkali liquor pool 1 for recycling through a wastewater lifting pump; the alkaline liquid pool 1 is provided with an alkaline chemical adding device 11, and the pH of water entering the alkaline liquid pool 1 from the sedimentation tank 4 is adjusted to 7-8; the water outlet of the alkaline solution pool 1 is connected with an alkaline spraying area 22 of the cleaning tower 2 to provide alkaline solution for the alkaline spraying area 22.
A filtering device 5 is arranged between the alkaline liquid pool 1 and the sedimentation pool 4 and used for filtering alkaline solution in the alkaline liquid pool, and in the embodiment, the filtering device 5 is a self-cleaning pipeline filter.
The alkaline solution in the alkaline solution tank 1 is a solution commonly used in the industry for alkaline cleaning, such as sodium carbonate, sodium hydroxide, alcohol amine and the like.
In this embodiment, the alkali spraying area 22 is provided with a ring-shaped header pipe, a plurality of nozzles are uniformly distributed on the header pipe, and the nozzles are connected with the alkali solution tank 1 and the compressed air tank 6, so that the alkali solution and the compressed air are uniformly mixed and sprayed out, and the sulfur-containing chlorine-containing gas entering the cleaning tower 2 from the air inlet 24 is subjected to alkali cleaning. The nozzle sprays alkaline solution fog drops to enlarge the contact area with blast furnace gas, so that the blast furnace gas alkali washing is more sufficient and the effect is better. Of course, other structures that achieve equivalent results may be substituted.
In order to facilitate the feedback adjustment of the alkali spraying device, the alkali spraying area 22 is further provided with a temperature, pressure, pH and other detection devices, such as a thermometer, a pressure sensor, a pH meter and the like.
In this embodiment, the dewatering zone 23 is a dewatering filler section for condensing water vapor in the gas after alkaline washing, and the dewatering filler section adopts drip film filler and is stacked by using a plurality of layers of square grid or hexagonal tubular fillers in a plurality of layers in a staggered arrangement.
In this embodiment, a circulating water pipeline is further disposed in the cleaning tower 2, and the circulating water pipeline is located between the alkali spraying area 22 and the dewatering area 23 and is used for performing secondary temperature reduction on the gas after alkali washing. Of course, the circulating water line can also be arranged above the dewatering space 23. Preferably, the circulating water pipeline is arranged in a snake shape, so that the heat exchange area is further enlarged.
Be equipped with a drainage chute 7 between recovery pond 3 and the sedimentation tank 4, be equipped with PAC charge device 71 on the drainage chute 7, sedimentation tank 4 is equipped with PAM charge device 41, makes the waste liquid that gets into sedimentation tank 4 deposit fast.
In order to further reduce the temperature of the outlet coal gas, a fan is arranged at the position of the air outlet 25.
The cleaning tower 2 is of an all-steel structure, and an access hole 26 is formed in the tower, so that the cleaning tower is convenient to overhaul.
And the sludge generated by the sedimentation tank 4 is discharged through a sludge discharge pipe, and the sedimentation tank 4 is connected with a sludge treatment system to treat the sludge.
The working process is as follows:
the alkaline solution in the alkaline solution pool 1 is pumped to an alkaline spraying area 22 of the cleaning tower 2 by a water supply pump, and is mixed with compressed air and then sprayed out to form fog drops; the blast furnace gas enters from a lateral lower gas inlet 24 of the cleaning tower 2 and ascends upwards, and is fully mixed with alkaline solution fog drops in an alkaline spraying area 22, and hydrogen sulfide H in the gas 2 S, hydrogen chloride HCl and other substances are largely dissolved in the fog drops, and the temperature of the coal gas is reduced; the gas after the alkali washing continues to go upwards, is cooled by a circulating water pipeline and then passes through a dehydration filler section of the cleaning tower 2, and water vapor in the gas after the alkali washing is condensed and removed; the gas after desulfurization and dechlorination is sent to downstream users or gas chambers from the gas outlet 25 of the cleaning tower 2 for storage. The reacted fog drops fall to a bottom collecting tank 21 under the action of gravity, and are collected and then are converged into a recovery tank 3 through a drainage ditch; the recovery tank 3 is provided with a NaOH dosing device, and the collected wastewater is sent to a sedimentation tank 4 for sedimentation after the pH value is adjusted; when the wastewater passes through a drainage flow groove 7 between the recovery tank 3 and the sedimentation tank 4, PAC is added by a PAC dosing device 71 to form floccules, so that the wastewater entering the sedimentation tank 4 can be rapidly precipitated, and the sedimentation tank 4 is provided with a PAM dosing device 41 to further enhance the precipitation effect of particles in the wastewater; and (4) sending the supernatant after precipitation to an alkali liquor pool 1 to adjust the pH value to 7-8, and cooling and pressurizing for recycling. Whole device can improve desulfurization dechlorination efficiency, and the water after spouting the alkali dechlorination can also carry out recycle, the water economy resource.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A blast furnace gas desulfurization dechlorination device which is characterized in that: the device comprises a cleaning tower, a recovery tank and a sedimentation tank, wherein the cleaning tower comprises a collecting tank, an alkali spraying area and a dehydration area which are sequentially arranged from bottom to top; the water inlet of the recovery tank is connected with the water outlet of the collection tank, and the recovery tank is used for adjusting the pH of the waste liquid flowing out of the collection tank; and the water inlet of the sedimentation tank is connected with the water outlet of the recovery tank, and the waste liquid is sent into the sedimentation tank for sedimentation after the pH value of the waste liquid is adjusted by the recovery tank.
2. The blast furnace gas desulfurization and dechlorination apparatus according to claim 1, characterized in that: the washing tower further comprises an alkali liquor pool, a water inlet of the alkali liquor pool is connected with a water outlet of the sedimentation pool, and a water outlet of the alkali liquor pool is connected with an alkali spraying area of the washing tower.
3. The blast furnace gas desulfurization and dechlorination apparatus according to claim 2, characterized in that: and a filtering device is arranged between the alkali liquor pool and the sedimentation pool.
4. The blast furnace gas desulfurization and dechlorination apparatus according to claim 1 or 2, characterized in that: the alkali spraying area is provided with an annular pipeline, a plurality of nozzles are uniformly distributed on the pipeline and connected with an alkali liquor pool and a compressed air tank, so that alkali liquor and compressed air are uniformly mixed and sprayed out, and the sulfur-containing chlorine-containing coal gas entering the cleaning tower from the air inlet is subjected to alkali washing.
5. The blast furnace gas desulfurization and dechlorination apparatus according to claim 4, characterized in that: and the alkali spraying area is also provided with a temperature, pressure and pH detection device for carrying out feedback adjustment on the alkali spraying device.
6. The blast furnace gas desulfurization and dechlorination apparatus according to claim 1, characterized in that: the dehydration zone is a dehydration filler section and is used for condensing and removing water vapor in the gas after the alkali washing.
7. The blast furnace gas desulfurization and dechlorination apparatus according to claim 1, characterized in that: and a circulating water pipeline is also arranged in the cleaning tower and is positioned between the alkali spraying area and the dewatering area.
8. The blast furnace gas desulfurization and dechlorination apparatus according to claim 1, characterized in that: and a drainage flow groove is arranged between the recovery tank and the sedimentation tank.
9. The blast furnace gas desulfurization and dechlorination apparatus according to claim 1, characterized in that: and a fan is arranged at the position of the air outlet.
10. The blast furnace gas desulfurization and dechlorination apparatus according to claim 1, characterized in that: the cleaning tower is of an all-steel structure, and an access hole is formed in the tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220694986.7U CN217103762U (en) | 2022-03-29 | 2022-03-29 | Blast furnace gas desulfurization and dechlorination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220694986.7U CN217103762U (en) | 2022-03-29 | 2022-03-29 | Blast furnace gas desulfurization and dechlorination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217103762U true CN217103762U (en) | 2022-08-02 |
Family
ID=82604782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220694986.7U Active CN217103762U (en) | 2022-03-29 | 2022-03-29 | Blast furnace gas desulfurization and dechlorination device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217103762U (en) |
-
2022
- 2022-03-29 CN CN202220694986.7U patent/CN217103762U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109654515B (en) | Organic silicon chlorine-containing organic waste gas and waste liquid recycling environment-friendly treatment system | |
| CN107777820B (en) | Process for applying waste heat of exhaust steam of air cooling island to zero discharge treatment of wastewater of thermal power plant | |
| CN110124347B (en) | Water-saving energy-saving type flue gas purifying device and method | |
| CN109234483B (en) | Blast furnace gas comprehensive treatment recovery device | |
| CN213513207U (en) | Dewatering and pollution discharging device for blast furnace gas conveying net | |
| CN105327604A (en) | Smoke processing system and method thereof | |
| CN102588989A (en) | Smoke spraying and purifying heat recovery system of gas boiler as well as gas and fuel oil burning device | |
| CN217103762U (en) | Blast furnace gas desulfurization and dechlorination device | |
| CN203807201U (en) | Multistage efficient air stripping system for ammonia nitrogen wastewater | |
| CN206204082U (en) | Wet desulphurization wastewater zero discharge and resource recovering system | |
| CN201493049U (en) | Waste gas purifying device | |
| CN106007050A (en) | Circulating water source system of coke dry quenching workshop | |
| CN216890433U (en) | Converter hot-stewing slag wastewater treatment system | |
| CN202511310U (en) | Flue gas spraying purification and heat recovery system for gas-fired boilers and gas and oil burning devices | |
| CN114291936A (en) | Converter hot-stewing slag wastewater treatment system | |
| CN210457560U (en) | Black water treatment equipment | |
| CN209512640U (en) | A kind of primary cooler lower section membrane off-line cleaning system | |
| CN112604496A (en) | System for removing hydrogen chloride and sulfur trioxide in flue gas in coordination with desulfurization wastewater | |
| CN109405631A (en) | A kind of offline cleaning process of primary cooler lower section and system | |
| CN206570161U (en) | A kind of graphite fluorine-containing waste water processing apparatus | |
| CN218951338U (en) | Device for improving yellow phosphorus gas spraying water quality | |
| CN217568007U (en) | Treatment device for acidolysis flue gas in sulfuric acid method titanium dioxide production process | |
| CN213771707U (en) | Industrial boiler dust removal desulfurization waste water recovery device | |
| CN108793549A (en) | Wet dedusting blast furnace gas system ammonia nitrogen waste water treatment method and its system | |
| CN214437911U (en) | Desulfurization and denitration device for waste gas treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |