CN218307115U - Device for strengthening sulfuric acid tail gas removal by additionally arranging gas guide coil pipe and throttle orifice plate - Google Patents
Device for strengthening sulfuric acid tail gas removal by additionally arranging gas guide coil pipe and throttle orifice plate Download PDFInfo
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Abstract
The utility model provides a device for strengthening the sulfuric acid tail gas removal by additionally arranging an air guide coil pipe and a throttle orifice plate, which comprises an absorption tower main body and a reverse spray tower, wherein the lower end of the reverse spray tower is communicated with the absorption tower main body; the top of the absorption tower main body is provided with a tail gas outlet, and the bottom of the absorption tower main body is used for storing absorption liquid; a liquid distributor and a liquid column injection device are arranged below the tail gas inlet in the reverse spray tower; the lower end of the reverse spray tower is provided with an air guide coil pipe, the air guide coil pipe comprises an air guide disc and a plurality of air guide pipes communicated with the air guide disc, and the air guide pipes are immersed in the absorption liquid at the bottom of the absorption tower main body; sulphuric acid tail gas gets into in the tower and absorbs the back with the liquid column reaction that liquid column injection apparatus erupted, from leading the aeration in the air coil pipe leads to absorption liquid in the absorption tower main part under the pressure of fan, carries out the secondary reaction and absorbs to reach better absorption effect, the device have that desulfurization efficiency is high, desulfurization effect is good, the export gas contains advantages such as fog low.
Description
Technical Field
The utility model belongs to the technical field of flue gas desulfurization, specifically say, relate to a install gas guide coil pipe and orifice plate additional and strengthen device of sulphuric acid tail gas desorption.
Background
SO 2 Is a gaseous pollutant with large quantity and wide influence range in the air pollutants, and is one of the main air pollutants faced by people at present. SO in atmosphere 2 The sources of (a) fall into two broad categories: natural sources and man-made sources. SO of natural origin due to the self-cleaning capacity of the atmospheric environment 2 The serious air pollution can not be caused generally; but artificially emitted SO 2 Large amount of SO in the atmosphere 2 2/3 of the total amount is a main cause of air pollution and acid rain. If the water cannot be effectively treated, the acidification of soil and water is increased, the ecological balance is damaged, and the biodiversity is influenced.
With the national attention on environmental protection, the enhancement of environmental awareness and the popularization of environmental regulations, most sulfuric acid enterprises in China increase the investment on sulfuric acid tail gas treatment, wherein the liquid column desulfurization tower has the advantages of full gas-liquid mass transfer and high desulfurization efficiency and becomes the focus of attention. However, the problems of low absorption efficiency of the liquid column alkaline washing tower, secondary washing, high cost and the like still exist in the actual industrial production.
CN202983508U discloses a liquid column tower multistage multi-scale injection apparatus, which is technically characterized in that injection nozzles of different types and heights are arranged in an absorption tower, and a plurality of layers of liquid drop dense layers with gradually increased particle sizes are sequentially formed in a tower body space.
CN109621681A discloses a Venturi desulfurization device, which comprises a main tower body, an air inlet pipe, a first spray device, a Venturi device, a second spray device, a desulfurization pump and an air outlet pipe, wherein a left tower chamber and a right tower chamber which are separated from each other are formed inside the main tower body, the inside of the right tower chamber is divided into an atomizing chamber, a reaction chamber and a purification chamber which are sequentially communicated from top to bottom, and the purification chamber is communicated with the left tower chamber through a connecting pipe; the air inlet pipe penetrates through the left tower chamber and is communicated with the top of the right tower chamber; the first spraying device is arranged in the atomizing chamber; the Venturi device is arranged in the reaction chamber; the second spraying device is arranged in the reaction chamber and penetrates through the Venturi device; the desulphurization pump is arranged on the outer side of the right tower chamber and is respectively connected with the first spraying device and the second spraying device; the air outlet pipe is communicated with the inside of the left tower chamber. The Venturi desulfurization device can effectively improve the liquid-gas ratio and reduce the using amount of the absorption liquid, but the desulfurization efficiency is not obviously improved, and the absorbed tail gas still cannot meet the requirement of industrial emission.
Therefore, the development of a more efficient and low-cost sulfuric acid tail gas removal device has great significance for the environmental protection field and the realization of the national strategy of carbon neutralization.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a device which is additionally provided with an air guide coil pipe and a throttle orifice plate to strengthen the removal of sulfuric acid tail gas. Through set gradually liquid column sprayer and air guide coil pipe in the tower against spouting, the tail gas that gets into in the tower is at first through liquid column reaction absorption back, and the aeration is gone into in the absorption liquid of absorption tower main part bottom to rethread air guide coil pipe, carries out the secondary reaction and absorbs to accelerate the speed of gas to the best defogging speed within range through porous throttle plate, realize good defogging effect.
The utility model discloses a realize through following technical scheme:
the utility model provides an install gas guide coil and orifice plate additional and strengthen device of sulphuric acid tail gas desorption, strengthen device of sulphuric acid tail gas desorption include absorption tower main part and lower extreme and the contrary tower that spouts of absorption tower main part lateral wall intercommunication, wherein:
the upper part of the reverse spray tower is provided with a tail gas inlet which is connected with a fan and used for blowing in tail gas; a tail gas outlet is formed in the top of the absorption tower main body, and the bottom of the absorption tower main body is used for storing absorption liquid;
a spraying device is arranged at the top end in the reverse spraying tower;
in the reverse spray tower, a liquid distributor and a liquid column injection device with the lower end communicated and fixed with the liquid distributor are installed below the tail gas inlet, the liquid column injection device comprises a plurality of liquid column injectors, a liquid inlet of the liquid distributor is communicated with the bottom end of the absorption tower main body through a circulating pipeline, and is used for conveying absorption liquid stored at the bottom in the absorption tower main body to the liquid distributor for distribution, then injecting the absorption liquid into the reverse spray tower through the liquid column injection device for reaction and absorption with the tail gas, and a water pump is arranged on the circulating pipeline;
the lower end of the reverse spray tower is provided with an air guide coil pipe, the air guide coil pipe comprises an air guide disc and a plurality of air guide pipes, one ends of the air guide pipes are communicated with the air guide disc, the periphery of the air guide disc is fixedly connected with the inner wall of the reverse spray tower, and the other ends of the air guide pipes are immersed in absorption liquid at the bottom of the absorption tower main body and used for introducing gas absorbed through liquid column reaction into the absorption liquid at the bottom of the absorption tower main body for aeration so as to carry out secondary enhanced reaction absorption;
and a throttling pore plate is arranged above the joint of the absorption tower main body and the reverse spray tower in the absorption tower main body.
The utility model discloses further set up as, the air guide dish connect perpendicularly in the inner wall of contrary tower that spouts, the air duct is soaked lower part in the absorption liquid of absorption tower main part bottom.
The utility model discloses further set up to, the air guide coil adopts the PVC material, the quantity and the pipe diameter of air duct adjust according to the tail gas handling capacity of liquid column tower, wherein the pipe diameter of air duct sets up to 1-5cm, and quantity basis the size adjustment of air guide coil.
The utility model discloses further set up to, in the absorption tower main part, be located the orifice plate top sets up the defroster for with the gas warp after the aeration reaction absorbs orifice plate acceleration rate to the scope of best defogging speed, follow after passing through above-mentioned defroster defogging the exhaust outlet is discharged.
The utility model discloses further set up to, the orifice plate adopts the polypropylene material, the orifice plate thickness of orifice plate is 3-5cm, and trompil diameter range is 0.1-1.5mm, can be according to the corresponding adjustment of the different defroster that uses.
The utility model is further arranged that the side wall of the absorption tower main body is provided with a liquid adding port for introducing absorption liquid required by the device for strengthening the removal of the sulfuric acid tail gas to the bottom of the absorption tower main body; the liquid filling port is connected with a liquid filling port valve and used for controlling the feeding of the absorption liquid in the absorption tower main body.
The utility model is further arranged in such a way that a main body tower liquid outlet valve and an ejector liquid inlet valve are sequentially arranged on the circulating pipeline along the water flow direction, and the main body tower liquid outlet valve and the ejector liquid inlet valve are arranged into one or more valves according to the actual operation requirement; the circulating pipeline is provided with a liquid flowmeter, and a first pressure gauge and a second pressure gauge are sequentially arranged along the water flow direction and used for monitoring the flow and the pressure on the circulating pipeline; and a liquid discharge pipeline is connected to the circulating pipeline, and a liquid discharge port valve is arranged on the liquid discharge pipeline and is used for controlling the discharge of the absorption liquid in the absorption tower main body.
The utility model discloses further set up to, the drain line sets up on the circulating line between main part tower liquid outlet valve and the sprayer inlet valve, and set up between first manometer and the second manometer, make first manometer and second manometer are used for monitoring the pressure of going out the liquid section and circulating section on the circulating line respectively.
The utility model discloses further set up to, spray set connects outside spray liquid pipeline, or connect with the spray liquid pipeline of absorption tower main part bottom intercommunication. Preferably, the spraying liquid pipeline is connected with the circulating pipeline, the absorption liquid in the absorption tower main body is used for spraying on the top of the reverse spray tower, and a spraying device valve is arranged on the spraying liquid pipeline and used for controlling feeding of the spraying liquid.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model provides a device for strengthening the removal of sulfuric acid tail gas by additionally arranging an air guide coil pipe and a throttle orifice plate, which leads the reacted gas in a liquid column tower into absorption liquid again for aeration and secondary absorption mass transfer by additionally arranging the air guide coil pipe so as to achieve better absorption effect and greatly improve the desulfurization efficiency; meanwhile, the throttle orifice is additionally arranged, and the speed of the gas overflowing after aeration is increased after passing through the throttle orifice, so that the fog content of the gas at the outlet is lower.
The device has the advantages of high desulfurization efficiency, good desulfurization effect, low fog content in the outlet gas and the like.
Drawings
FIG. 1 is a schematic flow chart of a process for strengthening the removal of sulfuric acid tail gas by adding an air guide coil and a throttle orifice plate according to the present invention;
FIG. 2 is a front view of the air guiding coil according to the present invention;
FIG. 3 is a side view of the air guide coil according to the present invention;
FIG. 4 is a front view of an orifice plate according to the present invention;
FIG. 5 is a side view of an orifice plate according to the present invention;
wherein, 1-the absorption tower main body; 2-a reverse spray tower; 3-tail gas inlet; 4-tail gas outlet; 5-a liquid distributor; 6-liquid column injection device; 7-a recycle line; 7-1 water pump; 7-2 main tower liquid outlet valve; 7-3 liquid inlet valve of ejector; 7-4 a first pressure gauge; 7-5 of a second pressure gauge; 7-6 liquid flow meter; 8-a spraying device; 9-a demister; 10-a liquid adding port; 10-1 of a liquid filling port valve; 11-a drain line; 11-1 liquid outlet valve; 12-spray liquid line; 12-1 spray device valve; 13-gas guiding coiled pipe; 13-1 air guide disc; 13-2, an air duct; 14-a restriction orifice plate; 15-a fan.
Detailed Description
The present invention will be described in further detail with reference to examples. It should be understood that the following examples are only for further illustration of the present invention and should not be construed as limitations on the scope of the present invention, and that certain non-essential improvements and modifications made by those skilled in the art according to the contents of the present invention still belong to the scope of the present invention.
Example 1
The utility model discloses a device for strengthening sulfuric acid tail gas removal by additionally installing an air guide coil pipe and a throttle orifice plate, as shown in figure 1, the device for strengthening sulfuric acid tail gas removal comprises an absorption tower main body 1 and a reverse spray tower 2 of which the lower end is communicated with the side wall of the absorption tower main body 1, wherein the upper part of the reverse spray tower 2 is provided with a tail gas inlet 3, and the tail gas inlet 3 is connected with a fan 15 and is used for blowing in tail gas; the top of the absorption tower main body 1 is provided with a tail gas outlet 4, and the bottom of the absorption tower main body 1 is used for storing absorption liquid; the spraying device 8 is arranged at the top end in the reverse spraying tower 2 and is used for spraying small fog drops to react with tail gas which just enters the reverse spraying tower 2; in the reverse spray tower 2, a liquid distributor 5 and a liquid column injection device 6 with the lower end communicated and fixed with the liquid distributor 5 are arranged below the tail gas inlet 3, the liquid column injection device 6 comprises a plurality of liquid column injectors, a liquid inlet of the liquid distributor 5 is communicated with the bottom end of the absorption tower main body 1 through a circulation pipeline 7, and is used for conveying absorption liquid stored at the bottom in the absorption tower main body 1 to the liquid distributor 5 for distribution and then injecting the absorption liquid into the reverse spray tower 2 through the liquid column injection device 6 for reaction and absorption with the tail gas, and a water pump 7-1 is arranged on the circulation pipeline 7; the lower end of the reverse spray tower 2 is provided with an air guide coil 13, as shown in fig. 2-3, the air guide coil 13 comprises an air guide disc 13-1 and a plurality of air guide tubes 13-2, one ends of the air guide tubes are communicated with the air guide disc 13-1, the periphery of the air guide disc 13-1 is fixedly connected with the inner wall of the reverse spray tower 2, and the other ends of the air guide tubes 13-2 are immersed in the absorption liquid at the bottom of the absorption tower main body 1 and are used for introducing the gas absorbed through the liquid column reaction into the absorption liquid at the bottom of the absorption tower main body 1 for aeration so as to carry out secondary enhanced reaction absorption; referring to fig. 4-5, a throttle orifice 14 and a demister 9 are sequentially disposed in the absorption tower main body 1 above the connection between the absorption tower main body 1 and the reverse spray tower 2, and are used for increasing the speed of the gas absorbed by the aeration reaction through the throttle orifice 14 to an optimal demisting speed range, and discharging the gas from the tail gas outlet 4 after demisting through the demister 9.
Further, the air guide plate 13-1 is vertically connected to the inner wall of the reverse spray tower 2, and the air guide pipe 13-2 is immersed in the lower part of the absorption liquid at the bottom of the absorption tower main body 1.
Further, the air guide coil 13 is made of PVC materials, the number and the pipe diameter of the air guide pipes 13-2 are adjusted according to the tail gas treatment capacity of the liquid column tower, wherein the pipe diameter of the air guide pipes 13-2 is generally set to be 1-5cm, and the number is adjusted according to the size of the air guide plate 13-2.
Furthermore, the orifice plate 14 is made of polypropylene, the thickness of the orifice plate 14 is 3-5cm, the diameter range of the opening is 0.1-1.5mm, and the orifice plate can be adjusted correspondingly according to different used demisters.
Further, a liquid adding port 10 is arranged on the side wall of the absorption tower main body 1 and is used for introducing absorption liquid required by the device for strengthening the removal of the sulfuric acid tail gas to the bottom of the absorption tower main body 1; the liquid filling port 10 is connected with a liquid filling port valve 10-1 and is used for controlling the feeding of the absorption liquid in the absorption tower main body 1.
Furthermore, a main tower liquid outlet valve 7-2 and an ejector liquid inlet valve 7-3 are sequentially arranged on the circulating pipeline 7 along the water flow direction, and one or more main tower liquid outlet valves 7-2 and one or more ejector liquid inlet valves 7-3 are arranged according to the actual operation requirement; the circulating pipeline 7 is provided with a liquid flowmeter 7-6, and a first pressure gauge 7-4 and a second pressure gauge 7-5 are sequentially arranged along the water flow direction and used for monitoring the flow and the pressure on the circulating pipeline 7; the circulating pipeline 7 is connected with a liquid discharge pipeline 11, and the liquid discharge pipeline 11 is provided with a liquid discharge port valve 11-1 for controlling the discharge of the absorption liquid in the absorption tower main body 1.
Preferably, the liquid discharge line 11 is arranged between the main tower liquid outlet valve 7-2 and the ejector liquid inlet valve 7-3 on the circulation line 7 and between the first pressure gauge 7-4 and the second pressure gauge 7-5, so that the first pressure gauge 7-4 and the second pressure gauge 7-5 are respectively used for monitoring the pressure of the liquid outlet section and the circulation section on the circulation line 7.
Further, the spraying device 8 is connected with an external spraying liquid pipeline, or is connected with a spraying liquid pipeline 12 communicated with the bottom end of the absorption tower main body 1; preferably, the spraying liquid pipeline 12 is connected to the circulating pipeline 7, the absorption liquid in the absorption tower main body 1 is used for spraying on the top of the reverse spray tower 2, and a spraying device valve 12-1 is arranged on the spraying liquid pipeline 12 for controlling the feeding of the spraying liquid.
The process of strengthening the sulfuric acid tail gas removal by utilizing the device for strengthening the sulfuric acid tail gas removal by additionally arranging the air guide coil and the throttle orifice plate sequentially occurs in the reverse spray tower 2 and the absorption tower main body 1, and the method for strengthening the sulfuric acid tail gas removal specifically comprises the following steps:
sulfuric acid tail gas enters the reverse spray tower 2 from a tail gas inlet 3 of the reverse spray tower 2 through the fan 15, and firstly reacts with small fog drops sprayed by a spraying device 8 at the top end of the reverse spray tower 2; then reacts and absorbs with the liquid column sprayed by the liquid column spraying device 6; the reacted gas is introduced into the absorption liquid in the absorption tower main body 1 from the gas guide coil 13 at the lower part of the reverse spray tower 2 under the pressure of the fan 15 for aeration, secondary reaction absorption is carried out, and meanwhile, the absorption liquid in the reverse spray tower 2 is circulated into the absorption tower main body 1 through the gas guide coil 13; the gas after reaction is accelerated by the throttle orifice 14 and then flows through the demister 9, so as to achieve the optimal demisting effect; the demisted gas is discharged from the tail gas outlet 4. The method ensures that the sulfur-containing tail gas is absorbed by liquid column injection and then is absorbed by secondary aeration, so that the desulfurization efficiency can be greatly improved; and meanwhile, the throttle orifice is additionally arranged, so that the gas flow rate is increased, and the mist content of the outlet gas is lower.
Further, the spraying device 8 generates a large amount of micro fog drops with the diameter of 30-120 μm, and the micro fog drops and the tail gas entering the reverse spraying tower 2 are firstly subjected to primary absorption.
Further, in order to ensure that the absorption liquid smoothly enters the liquid column ejector 6-1 and the liquid column with sufficient height is generated by ejection, a certain pressure needs to be provided by the water pump 7-1, specifically, the water pressure of the water pump 7-1 reaches 0.35Mpa, and the lift is set to be more than 35 m.
Furthermore, the flow rate of the gas after aeration by the air guide coil 13 is 0.5-1.0m/s, and the flow rate of the gas after aeration by the orifice plate 14 is increased to 2-4m/s, so that the optimal demisting flow rate range is achieved.
Example 2
Device and method for treating SO discharged from certain chemical plant by adopting enhanced sulfuric acid tail gas removal device additionally provided with air guide coil and throttle orifice plate in embodiment 1 2 The concentration is about 1500mg/m 3 The flow rate of the sulfuric acid tail gas is 100000m 3 The specific structure and parameters of the sulfuric acid tail gas removal device are as follows:
the absorbent is sodium hydroxide; the water pressure of the water pump reaches 0.35Mpa, and the lift is set to 35m;
air guide coil pipe adopts the PVC material, the pipe diameter of air duct sets up to 2cm, and quantity is 40, orifice plate adopts the polypropylene material, orifice plate thickness of orifice plate is 4cm, and the trompil diameter is 1.0mm.
Detecting SO discharged from the tail gas outlet after stable operation for several days 2 The results of concentration and alkali consumption are shown in the following table.
| Inlet SO 2 Concentration (mg/m) 3 ) | Outlet SO 2 Concentration (mg/m) 3 ) | Alkali consumption (t/day) | Absorption efficiency | |
| Example 2 | 1495 | 135 | 10 | 90.9％ |
Comparative examples 1 to 2
The sulfur-containing tail gas described in example 2 was treated with the apparatus and method for enhanced sulfuric acid tail gas removal described in example 2, and the same inlet flow rate as in example 2 was used, except that the reverse spray tower of comparative example 1 was not equipped with a liquid column spray apparatus, and the apparatus of comparative example 2 was not equipped with an air guide coil for aeration and secondary absorption.
Detecting SO discharged from the tail gas outlet after stable operation for several days 2 The results of the concentration and alkali consumption are shown in the following table.
| Inlet SO 2 Concentration (mg/m) 3 ) | Outlet SO 2 Concentration (mg/m) 3 ) | Alkali consumption (t/day) | Absorption efficiency | |
| Comparative example 1 | 1492 | 250 | 20 | 83.2％ |
| Comparative example 2 | 1487 | 225 | 18 | 84.8％ |
As can be seen from the above table, in SO 2 Example 2 outlet SO with almost identical inlet concentration 2 The concentration is lower than that of comparative examples 1-2, the absorption efficiency is obviously higher than that of comparative examples 1-2, the alkali consumption is also lower than that of comparative examples 1-2, and the SO of example 2 is applied in the actual production 2 The tail gas absorption efficiency is high, and the treatment cost is also greatly lower.
The present application is described in detail for the purpose of enabling those skilled in the art to understand the content of the present application and to implement the same, and the scope of the present application should not be limited thereby.
Claims (9)
1. The utility model provides an install gas guide coil and orifice plate additional and strengthen device of sulphuric acid tail gas desorption, its characterized in that, strengthen device of sulphuric acid tail gas desorption include absorption tower main part and lower extreme with the anti-tower that spouts of absorption tower main part lateral wall intercommunication, wherein:
the upper part of the reverse spray tower is provided with a tail gas inlet which is connected with a fan; the top of the absorption tower main body is provided with a tail gas outlet, and the bottom of the absorption tower main body is used for storing absorption liquid;
a spraying device is arranged at the top end in the reverse spraying tower;
in the reverse spray tower, a liquid distributor and a liquid column injection device of which the lower end is communicated with the liquid distributor are arranged below the tail gas inlet, a liquid inlet of the liquid distributor is communicated with the bottom end of the absorption tower main body through a circulating pipeline, and a water pump is arranged on the circulating pipeline;
the lower end of the reverse spray tower is provided with an air guide coil pipe, the air guide coil pipe comprises an air guide disc and a plurality of air guide pipes, one ends of the air guide pipes are communicated with the air guide disc, the periphery of the air guide disc is fixedly connected with the inner wall of the reverse spray tower, and the other ends of the air guide pipes are immersed in the absorption liquid at the bottom of the absorption tower main body;
and a throttling pore plate is arranged above the joint of the absorption tower main body and the reverse spray tower in the absorption tower main body.
2. The apparatus for strengthening sulfuric acid tail gas removal according to claim 1, wherein the gas guide plate is vertically connected to the inner wall of the reverse spray tower, and the gas guide pipe is immersed in the lower part of the absorption liquid at the bottom of the absorption tower main body.
3. The device for strengthening the removal of sulfuric acid tail gas according to claim 1, wherein the pipe diameter of the gas-guide pipe is 1-5cm.
4. The apparatus for enhancing sulfuric acid tail gas removal according to claim 1, wherein a demister is arranged above the orifice plate in the absorption tower main body.
5. The apparatus for enhancing sulfuric acid tail gas removal according to claim 1, wherein the orifice plate of the orifice plate has a thickness of 3-5cm and an opening diameter in the range of 0.1-1.5mm.
6. The apparatus for enhancing sulfuric acid tail gas removal according to claim 1, wherein the spraying apparatus is connected to a spraying liquid line, and the spraying liquid line is connected to the circulation line.
7. The apparatus for strengthening sulfuric acid tail gas removal according to claim 1, wherein a filling opening is arranged on the side wall of the absorption tower main body, and the filling opening is connected with a filling opening valve.
8. The apparatus for enhancing sulfuric acid tail gas removal according to claim 1, wherein the circulation pipeline is provided with a main tower liquid outlet valve and an ejector liquid inlet valve in sequence along a water flow direction, and the main tower liquid outlet valve and the ejector liquid inlet valve are one or more.
9. The apparatus for enhancing sulfuric acid tail gas removal according to claim 1, wherein a liquid discharge line is connected to the circulation line, and a liquid discharge port valve is arranged on the liquid discharge line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222597601.8U CN218307115U (en) | 2022-09-29 | 2022-09-29 | Device for strengthening sulfuric acid tail gas removal by additionally arranging gas guide coil pipe and throttle orifice plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222597601.8U CN218307115U (en) | 2022-09-29 | 2022-09-29 | Device for strengthening sulfuric acid tail gas removal by additionally arranging gas guide coil pipe and throttle orifice plate |
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| CN202222597601.8U Active CN218307115U (en) | 2022-09-29 | 2022-09-29 | Device for strengthening sulfuric acid tail gas removal by additionally arranging gas guide coil pipe and throttle orifice plate |
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