WO2022099690A1

WO2022099690A1 - Acid mist absorption assembly for sulfuric acid production

Info

Publication number: WO2022099690A1
Application number: PCT/CN2020/129046
Authority: WO
Inventors: 杨璧诚; 王立彪
Original assignee: 苏州睿澎诚科技有限公司
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2022-05-19

Abstract

An acid mist absorption assembly for sulfuric acid production, comprising a base (1); a circulating water tank (2) is fixedly connected to the middle of the top of the base (1); a spray tower (3) is connected to the left side of the top of the circulating water tank (2) in a penetrating mode, and a liquid level gauge (4) is connected to the right side of the top of the circulating water tank (2) in a penetrating mode; a circulating water pump (5) is fixedly connected to the top of the base (1); a support (6) is mounted at the right side of the circulating water pump (5); a dosing barrel (7) fixedly connected to the top of the support (6); a working ladder (8) is fixedly connected to the top of the right wall of the support (6); an extractable filter screen (9) is connected to the right wall of the circulating water tank (2) in a penetrating mode; a drug pipeline (10) is connected to the left wall of the dosing barrel (7) in a penetrating mode; a vent pipe (11) is connected to the top of the spray tower (3) in a penetrating mode; a glass fiber reinforced plastics blower (12) is connected to a left port of the vent pipe (11) in a penetrating mode; an activated carbon filter interlayer (13) is mounted at the top of the glass fiber reinforced plastics blower (12); a chimney (14) is fixedly connected to the top of the activated carbon filter interlayer (13); and an inspection window (15) is mounted on the front of the spray tower (3).

Description

An acid mist absorption component for sulfuric acid production

technical field

The invention relates to the technical field of environmental protection, in particular to an acid mist absorption component produced by sulfuric acid.

Background technique

Acid mist usually refers to mist-like acid substances. The particles of acid mist in the air are very small, smaller than those of water mist, and higher than the humidity of smoke. Substances between water mist and water mist are highly corrosive, including acid mist formed by inorganic acids such as sulfuric acid, nitric acid, and hydrochloric acid, and organic acids such as formic acid, acetic acid, and propionic acid. In the process of acid use in metallurgy, electroplating, textile (chemical fiber), machinery manufacturing and other industries, such as acid production, pickling, electroplating, electrolysis, acid battery charging, etc. of acid. Because the mixture of various acids is often used in these acid-using processes, the exhaust gas discharged is mostly a mixture of various acid mists. The discharge of acid mists will cause acid mists and acid gases in the air of the workplace. After being discharged into the atmosphere, it will cause acid deposition in the atmospheric environment. It not only endangers the health of workers and residents around the plant, corrodes plant equipment and precision instruments, and causes losses in production and life, but also adversely affects the survival of crops and other animals and plants, causing damage to buildings, cultural relics, etc. Therefore, while people are strengthening the control of coal-fired flue gas and automobile exhaust, it is also urgent to take effective measures to control the emission of acid mist, so as to curb the acidification of the atmospheric environment and the development of acid rain, which are discharged in the air. The acid mist contacts water vapor, and a liquid-phase oxidation reaction occurs to form acid raindrops. During the descending process, it continuously merges and absorbs other acid-containing raindrops to form larger particles of raindrops, which fall to the ground to form acid rain. Corrosive, has a destructive effect on the environment, we should find a way to control it to prevent the environment from being damaged. The control of acid rain starts with the control of acid fog, reducing the formation of acid fog, reducing the amount of acid rain, and causing less pollution to the environment. Traditional process equipment and methods cannot recover acid rain. Now special acid mist recovery and treatment equipment must be used to recover a large amount of acid mist and reduce the air discharge. Acid mist must be recovered. Recyclable acid mist equipment is used, and the equipment has cooling absorption. The tower uses the hydrochloric acid gas solubility curve to absorb and cool the hydrochloric acid gas with tap water, thereby recovering the hydrochloric acid. The design of direct absorption and indirect cooling is adopted to increase the contact between the gas and the acid mist of hydrochloric acid to maximize the recovery of the acid mist. To reduce the content of acid mist in the air, it is necessary for manufacturers in the chemical industry, metallurgy and other industries not to discharge acid-containing gas casually. In the process of acid production and acid use, acid mist recovery and treatment equipment absorbs acid mist at the source to solve acid mist emission. The problem is to reduce the content of acid mist in the air, effectively control acid mist, and reduce environmental pollution. In industrial production, some acidic and corrosive gases need to be treated and absorbed. These acidic and corrosive gases will pollute the environment and endanger human health. Industrial production in many industries now discharges industrial waste gas. These industrial waste gases contain acid and corrosive gases. Generally, the acid and corrosive gas effect of absorbing and purifying gas equipment is not good. Therefore, we need to use acid mist absorption equipment. In terms of acid resistance and degradation rate, the degradation rate of acid mist is higher and meets the national emission standard.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an acid mist absorbing assembly for the production of sulfuric acid, so as to solve the problems raised in the above-mentioned background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: an acid mist absorption assembly for sulfuric acid production, comprising a base, a circulating water tank is fixedly connected to the middle of the top of the base, and a spray is connected through the left side of the top of the circulating water tank. The tower, the right side of the top of the circulating water tank is connected with a liquid level gauge, the top of the base is fixedly connected with a circulating water pump, the right side of the circulating water pump is installed with a bracket, and the top of the bracket is fixedly connected with a dosing barrel The top of the right wall of the bracket is fixedly connected with a working ladder, the right wall of the circulating water tank is connected with an extractable filter screen, the left wall of the dosing barrel is connected with a drug delivery pipeline, and the spray tower The top is connected with a ventilation pipe, the left port of the ventilation pipe is connected with a FRP fan, an activated carbon filter interlayer is installed on the top of the FRP fan, and a chimney is fixedly connected to the top of the activated carbon filter interlayer. There is an inspection window installed on the front.

Preferably, the medicine delivery pipeline includes a medicine inlet port and a pipeline connection port, the top of the medicine inlet port fits with the top of the medicine dosing barrel, and the pipeline connection port is opened on the right wall of the medicine dosing barrel. The connection method makes the acid mist produced by the production of sulfuric acid enter the spray tower, and the sodium hydroxide solution is added into the dosing barrel to be transported to the circulating water tank through the drug delivery pipeline. When the acid mist enters the spray tower, the circulating water pump will continue to transport. The water in the circulating water tank is sprayed by the sprinkler head to degrade the acid mist.

Preferably, a water delivery pipeline is fixedly connected to the top port of the circulating water pump, and the left pipeline of the circulating water pump penetrates the right wall of the circulating water tank and extends to the inner cavity of the circulating water tank.

Preferably, the transmission motors of the FRP fan are double motors, and the transmission motors are fixedly connected to each other by belts.

Preferably, the inner cavity of the dosing barrel is filled with NaOH solution, and a packing layer is fixedly connected to the tower body of the spray tower, and the packing layer uses calcium oxide interlayer, sodium chloride interlayer, and fine sand interlayer. The sulfuric acid in the acid mist is continuously degraded, and the acid mist is brought into the anaerobic tank by the spray water through the honeycomb water distributor. The ionization of the acid mist in the anaerobic tank can degrade the acid mist to the greatest extent.

Preferably, physical ionization equipment is installed in the anaerobic tank.

Preferably, the FRP fan includes a casing, the bottom of the casing is fixedly connected to the inner cavity of the chimney, the inner cavity of the casing is provided with a fan blade, and the left wall of the casing is connected with a transmission motor through it, An air inlet duct is connected through the right wall of the casing, and an air supply duct is opened on the top of the casing.

Preferably, the spray tower includes a tower body, the bottom of the tower body is connected to the left side of the top of the circulating water tank, the right wall of the tower body is connected to a water delivery pipeline, and the bottom of the water delivery pipeline is connected through A spray head is connected, a mist absorption layer is fixedly connected to the top of the inner cavity of the tower, a packing layer is installed on the top of the water pipeline, and an anaerobic tank is installed at the bottom of the inner cavity of the tower, and the anaerobic tank is installed. There is a water filter opening at the bottom of the filler layer, a mesh grid is fixedly connected to the top of the packing layer, a calcium oxide interlayer is fixedly connected to the bottom of the mesh grid, and a fine sand interlayer is fixedly connected to the bottom of the calcium oxide interlayer. A sodium chloride interlayer is fixedly connected to the bottom of the fine sand interlayer, and a honeycomb water distributor is fixedly connected to the bottom of the sodium chloride interlayer.

Compared with the prior art, the beneficial effects of the present invention are:

1. The acid mist absorption component produced by sulfuric acid uses the method of pipeline connection to make the acid mist generated by sulfuric acid production enter the spray tower, and then add sodium hydroxide solution from the dosing barrel to the circulating water tank through the drug delivery pipeline. The acid mist enters the spray tower, and the circulating water pump will continuously transport the water in the circulating water tank to be sprayed out by the spray head, so that the acid mist is degraded. Calcium oxide interlayer, sodium chloride interlayer and fine sand interlayer can continuously degrade sulfuric acid in acid mist. The ionization of acid mist can degrade the acid mist to the greatest extent, and more solid impurities will be generated after ionization. In order to avoid blocking many pipes in the circulating water tank, an extractable filter screen is installed on the top of the inner cavity of the circulating water tank for blocking. The fixed impurities generated by ionization will degrade most of the acid mist through continuous water circulation spraying, and a small part of the acid mist will be absorbed by the suction layer when entering the spray tower. To avoid residual acid mist, an activated carbon filter interlayer is installed at the top outlet of the FRP fan to block the residue, so that the gas emitted from the chimney meets the emission standards.

2. The acid mist absorption component produced by the sulfuric acid mainly passes through the filler layer to make the acid mist undergo preliminary degradation. The traditional acid mist absorption device also uses this principle. Compared with the traditional one, we add an anaerobic tank, and the anaerobic There is a physical ionization device installed in the pool, which mainly uses ionization to ionize the sulfate ions in the acid mist, and then degrades through the packing layer, so that the acid mist can be absorbed and degraded to the greatest extent, and the strength of acid mist absorption is increased.

3. The acid mist absorption component produced by the sulfuric acid and the glass fiber reinforced plastic acid mist absorption tower are currently mostly used for the treatment of corrosive gases (such as acid and alkaline waste gas) by the liquid absorption method. The key to the use of liquid absorption method to treat this waste gas lies in the selection of purification equipment. The process and product have the characteristics of simple structure, low energy consumption, high purification efficiency and wide application range. The acid mist waste gas is introduced into the purification tower by the air duct, and passes through the packing layer. , the exhaust gas and the sodium hydroxide solution are fully contacted with the gas-liquid two-phase absorption and neutralization reaction, the acid mist exhaust gas is purified, and then dewatered and demisted by the defogging plate, and then discharged into the atmosphere by the fan. The absorption liquid is pressurized by the water pump at the bottom of the tower and sprayed down at the top of the tower, and finally refluxed to the bottom of the tower for recycling.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the sectional schematic diagram of the structure chimney and FRP fan of the present invention;

3 is a schematic diagram of the inner cavity of a spray tower with a structure of the present invention;

4 is a schematic diagram of the layers of the structured packing layer of the present invention;

FIG. 5 is a schematic cross-sectional view of the drug delivery pipeline of the structure of the present invention.

In the picture: 1 base, 2 circulating water tank, 3 spray tower, 31 tower body, 32 water pipeline, 33 spray head, 34 mist absorption layer, 35 packing layer, 351 mesh grid, 352 calcium oxide interlayer, 353 Fine sand interlayer, 354 sodium chloride interlayer, 355 honeycomb water distributor, 36 anaerobic tank, 37 water filter outlet, 4 liquid level gauge, 5 circulating water pump, 6 bracket, 7 dosing barrel, 8 working ladder, 9 extractable filter Net, 10 medicine delivery pipes, 101 medicine inlet ports, 102 pipe connection ports, 11 ventilation pipes, 12 FRP fans, 121 shells, 122 fan blades, 123 transmission motors, 124 air inlet pipes, 125 air supply pipes, 13 activated carbon filters Mezzanine, 14 chimneys, 15 inspection windows.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-5, the present invention provides a technical solution: an acid mist absorption component produced by sulfuric acid, comprising a base 1, a circulating water tank 2 is fixedly connected to the middle of the top of the base 1, and the left side of the top of the circulating water tank 2 is connected through There is a spray tower 3, a liquid level gauge 4 is connected through the right side of the top of the circulating water tank 2, a circulating water pump 5 is fixedly connected to the top of the base 1, a bracket 6 is installed on the right side of the circulating water pump 5, and the top of the bracket 6 is fixedly connected with a The dosing barrel 7, the top of the right wall of the support 6 is fixedly connected with a working ladder 8, the right wall of the circulating water tank 2 is connected with an extractable filter screen 9, and the left wall of the dosing barrel 7 is connected with a drug delivery pipeline 10, spraying The top of the tower 3 is connected with a ventilation pipe 11, the left port of the ventilation pipe 11 is connected with a FRP fan 12, an activated carbon filter interlayer 13 is installed on the top of the FRP fan 12, and a chimney 14 is fixedly connected to the top of the activated carbon filter interlayer 13. A viewing window 15 is mounted on the front of the tower 3 .

Example 1: The spray tower 3 includes a tower body 31, the bottom of the tower body 31 is connected to the left side of the top of the circulating water tank 2, the right wall of the tower body 31 is connected with a water delivery pipeline 32, and the bottom of the water delivery pipeline 32 is connected through A spray head 33 is connected, a mist absorbing layer 34 is fixedly connected to the top of the inner cavity of the tower body 31, a packing layer 35 is installed on the top of the water delivery pipeline 32, and an anaerobic pool 36 is installed at the bottom of the inner cavity of the tower body 31. The bottom of the pool 36 is provided with a water filter port 37, and the sodium hydroxide solution is added into the dosing barrel 7 to be transported to the circulating water tank 2 through the drug delivery pipeline 10. When the acid mist enters the spray tower, the circulating water pump will continuously transport the circulating water tank 2. The water is sprayed by the spray head 33, so that the acid mist is degraded.

Embodiment 2: The top of the filler layer 35 is fixedly connected with a mesh grid 351, the bottom of the mesh grid 351 is fixedly connected with a calcium oxide interlayer 352, and the bottom of the calcium oxide interlayer 352 is fixedly connected with a fine sand interlayer 353, fine sand interlayer The bottom of 353 is fixedly connected with a sodium chloride interlayer 354, the bottom of the sodium chloride interlayer 354 is fixedly connected with a honeycomb water distributor 355, and a packing layer 35 is fixedly connected in the tower body of the spray tower 3, and in the packing layer 35 The use of calcium oxide interlayer, sodium chloride interlayer and fine sand interlayer can continuously degrade the sulfuric acid in the acid mist. Ionizing the acid mist can degrade the acid mist to the greatest extent.

Example 3: The FRP fan 12 includes a casing 121, the bottom of the casing 121 is fixedly connected to the inner cavity of the chimney 14, the fan blade 122 is installed in the inner cavity of the casing 121, and the transmission motor 123 is connected through the left wall of the casing 121 , the right wall of the housing 121 is connected with an air inlet duct 124, and the top of the housing 121 is provided with an air supply duct 125. The medicine delivery pipeline 10 includes a medicine inlet port 101 and a pipeline connection port 102. The top of the medicine inlet port 101 is connected to the feeder The top of the medicine barrel 7 is matched, the pipeline connection port 102 is opened on the right wall of the medicine barrel 7, the top port of the circulating water pump 5 is fixedly connected with a water delivery pipeline 32, and the left side pipeline of the circulating water pump 5 runs through the circulating water tank 2. The right wall extends to the inner cavity of the circulating water tank 2. The transmission motor 123 of the FRP fan 12 is a double motor, and the transmission motors 123 are fixedly connected to each other through a belt. The inner cavity of the dosing barrel 7 is filled with NaOH solution, and the anaerobic tank 36 A physical ionization device is installed in it.

Working principle: The acid mist produced by the production of sulfuric acid enters the spray tower 3 by means of pipeline connection, and the sodium hydroxide solution is added into the dosing barrel 7 and transported to the circulating water tank 2 through the drug delivery pipeline 10. In the spray tower 3, the circulating water pump 5 will continuously transport the water in the circulating water tank 2 to be sprayed by the spray head 33, so that the acid mist is degraded. In layer 35, calcium oxide interlayer 352, sodium chloride interlayer 353, and fine sand interlayer 354 can be used to continuously degrade the sulfuric acid component in the acid mist, and the acid mist is brought into the anaerobic tank 36 through the honeycomb water distributor 355 by the spray water, Using the ionosphere in the anaerobic tank to ionize the acid mist can degrade the acid mist to the greatest extent, and more solid impurities will be generated after ionization. An extractable filter screen 9 is installed on the top of the ionto In this way, the FRP fan 12 is reused by using the ventilation pipe 11 to inhale into the chimney 14. In order to avoid residual acid mist residue, an activated carbon filter interlayer 13 is installed at the top outlet of the FRP fan 12 to block the residue, so that the gas discharged from the chimney meets the discharge requirements. standard.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

An acid mist absorption component produced by sulfuric acid, comprising a base (1), characterized in that: a circulating water tank (2) is fixedly connected to the middle of the top of the base (1), and the left side of the top of the circulating water tank (2) penetrates through A spray tower (3) is connected, a liquid level gauge (4) is connected through the right side of the top of the circulating water tank (2), and a circulating water pump (5) is fixedly connected to the top of the base (1). A bracket (6) is installed on the right side of the water pump (5), a dosing barrel (7) is fixedly connected to the top of the bracket (6), and a working ladder (8) is fixedly connected to the top of the right wall of the bracket (6). The right wall of the circulating water tank (2) is connected with an extractable filter screen (9), the left wall of the dosing barrel (7) is connected with a drug delivery pipeline (10), the spray tower (3) A ventilation pipe (11) is connected through the top of the ventilation pipe (11), a glass fiber reinforced plastic fan (12) is connected through the left port of the ventilation pipe (11), and an activated carbon filter interlayer (13) is installed on the top of the glass fiber reinforced plastic fan (12). A chimney (14) is fixedly connected to the top of the activated carbon filter interlayer (13), and an inspection window (15) is installed on the front of the spray tower (3).
The acid mist absorption assembly for sulfuric acid production according to claim 1, wherein the spray tower (3) comprises a tower body (31), and the bottom of the tower body (31) is penetratingly connected to the top of the circulating water tank (2) On the left side of the tower body (31), the right wall of the tower body (31) is connected with a water delivery pipeline (32), and the bottom of the water delivery pipeline (32) is connected with a sprinkler head (33), and the tower body (31) ) The top of the inner cavity is fixedly connected with a mist suction layer (34), the top of the water pipeline (32) is installed with a packing layer (35), and the bottom of the inner cavity of the tower body (31) is installed with an anaerobic tank ( 36), a water filter port (37) is opened at the bottom of the anaerobic tank (36).
The acid mist absorbing assembly for sulfuric acid production according to claim 2, wherein the top of the packing layer (35) is fixedly connected with a mesh grill (351), and the bottom of the mesh grill (351) is fixedly connected There is a calcium oxide interlayer (352), the bottom of the calcium oxide interlayer (352) is fixedly connected with a fine sand interlayer (353), and the bottom of the fine sand interlayer (353) is fixedly connected with a sodium chloride interlayer (354), A honeycomb water distributor (355) is fixedly connected to the bottom of the sodium chloride interlayer (354).
The acid mist absorption assembly for sulfuric acid production according to claim 1, wherein the FRP fan (12) comprises a casing (121), and the bottom of the casing (121) is fixedly connected to the inner cavity of the chimney (14) A fan blade (122) is installed in the inner cavity of the housing (121), a transmission motor (123) is connected through the left wall of the housing (121), and the right wall of the housing (121) is connected through There is an air inlet duct (124), and an air supply duct (125) is opened on the top of the casing (121).
The acid mist absorption assembly for sulfuric acid production according to claim 1, wherein the medicine delivery pipeline (10) comprises a medicine inlet port (101) and a pipeline connection port (102), and the top of the medicine inlet port (101) Fitting with the top of the dosing barrel (7), the pipe connection port (102) is opened on the right wall of the dosing barrel (7).
The acid mist absorption assembly for sulfuric acid production according to claim 1, characterized in that: the top port of the circulating water pump (5) is fixedly connected with a water delivery pipeline (32), and the circulating water pump (5) has a The left pipe runs through the right wall of the circulating water tank (2) and extends to the inner cavity of the circulating water tank (2).
The acid mist absorbing component produced by sulfuric acid according to claim 1, characterized in that: the transmission motors (123) of the FRP fan (12) are double motors, and the transmission motors (123) are fixedly connected to each other by belts .
The acid mist absorption assembly for sulfuric acid production according to claim 1, characterized in that: the inner cavity of the dosing barrel (7) is canned with NaOH solution.
The acid mist absorption assembly for sulfuric acid production according to claim 2, characterized in that: a physical ionization device is installed in the anaerobic tank (36).