CN213725578U

CN213725578U - Sulfuric acid production flue gas washing clarification plant

Info

Publication number: CN213725578U
Application number: CN202022515476.2U
Authority: CN
Inventors: 向永忠
Original assignee: Shaoguan Qujiang Xianghe Fine Chemical Co ltd
Current assignee: Shaoguan Qujiang Xianghe Fine Chemical Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-07-20
Anticipated expiration: 2030-11-03

Abstract

The utility model discloses a flue gas washing and purifying device for sulfuric acid production, which comprises a purifying box, an air inlet pipe, a circulating groove, an exhaust pipe, a cooling combination communicated with the circulating groove and a spraying combination communicated with the cooling combination; the purifying box comprises a box body, a dustproof filter screen, an activated carbon layer arranged below the dustproof filter screen, a hollowed-out support, two motor bases symmetrically arranged, an air draft motor, a washing chamber, a filling layer and a hollow polyhedral ball arranged in the filling layer; through the synergism between dustproof filter screen and the activated carbon layer, dust and granule in the high-efficient filtration flue gas avoid forming the acid mud in the circulating slot, cooperate the intraformational hollow polyhedral ball of packing again, improve the purification efficiency of washing room, through cooling combination and spraying combination cooperation, do benefit to dilute sulfuric acid spraying washing flue gas to absorb the heat in the flue gas, the dilute sulfuric acid that recycles the cooling combination and will drip in the circulating slot cools off, thereby recycle dilute sulfuric acid, green.

Description

Sulfuric acid production flue gas washing clarification plant

Technical Field

The utility model relates to a sulphuric acid production field, concretely relates to sulphuric acid production flue gas washing clarification plant.

Background

In the production of sulfuric acid, sulfur concentrate containing 40% of sulfur and 7% of water needs to be sent to a roasting section for high-temperature smelting, SO that flue gas containing SO2 gas is obtained, but the flue gas contains more mineral dust and harmful gas besides SO2 gas, SO that various devices are needed for purifying the flue gas, and the production cost is high; in addition, when utilizing scrubbing tower equipment to cool down the flue gas and get rid of harmful gas, lead to the ore deposit to pile up at the circulating slot easily, lead to the formation of acid mud to block up the circulating slot, lead to supplying the acid not enough, influence production efficiency.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a sulphuric acid production flue gas washing clarification plant that has that dust removal effect is good, purification efficiency is high, avoid the circulation tank to block up and green.

In order to solve the technical problem, the technical scheme of the utility model is that: a sulfuric acid production flue gas washing and purifying device comprises a purifying box, an air inlet pipe arranged at the top of the purifying box and communicated with the purifying box, a circulating groove arranged at the bottom of the purifying box, an exhaust pipe arranged on the side surface of the purifying box and communicated with the circulating groove, a cooling combination arranged on the other side of the purifying box and communicated with the circulating groove, and a spraying combination communicated with the cooling combination; the purifying box includes the box, sets up the dustproof filter screen at box top sets up the active carbon layer of dustproof filter screen below sets up the fretwork support of active carbon layer below sets up on the fretwork support, for two motor cabinets that the symmetry set up, set up air draft motor on the motor cabinet sets up the washing room of fretwork support below sets up the filling layer of washing room lower extreme sets up the intraformational hollow many-sided ball that is used for promoting the washing effect of filling.

Preferably, the top of the air draft motor is provided with an air draft fan blade.

Preferably, the cooling combination comprises a circulating pipe, a circulating pump arranged on the circulating pipe, a cooling row arranged at one end of the circulating pipe and communicated with the circulating pipe, and a liquid outlet pipe arranged at one side of the upper end of the cooling row.

Preferably, the cooling row is provided with heat dissipation fins.

Preferably, the spray combination comprises a main spray pipe, a plurality of spray heads which are arranged at the lower end of the main spray pipe and are arranged at equal intervals, a three-way joint arranged at one end of the main spray pipe, an acid adding pipe arranged at the upper end of the three-way joint, and an acid adding pump arranged on the acid adding pipe.

Preferably, the exhaust pipe is provided with and communicated with an electrostatic demisting device.

The utility model discloses technical effect mainly embodies: through the synergistic effect between the dustproof filter screen and the activated carbon layer, dust and particles in the flue gas are efficiently filtered, the circulation tank is prevented from being blocked due to acid mud formed in the circulation tank, and then the hollow polyhedral balls in the filling layer are matched, so that the purification efficiency of the washing chamber is further improved, through the combination and the spraying combination, the flue gas is favorably sprayed and washed by dilute sulfuric acid, the heat in the flue gas is absorbed, and the dilute sulfuric acid dropping into the circulation tank is cooled by utilizing the cooling combination, so that the dilute sulfuric acid is recycled, and the environment is protected; therefore, the dust removal device has the advantages of good dust removal effect, high purification efficiency, avoidance of blockage of the circulation tank and environmental protection.

Drawings

FIG. 1 is a structural diagram of a flue gas washing and purifying device for sulfuric acid production of the present invention;

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and grasped.

In the present embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right", "left", "above", "back", "middle", and the like indicate the orientation 0 or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for convenience of describing the present invention, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present embodiment, if the connection or fixing manner between the components is not specifically described, the connection or fixing manner may be a bolt fixing manner, a pin connecting manner, or the like, which is commonly used in the prior art, and therefore, details thereof are not described in the present embodiment.

A sulfuric acid production flue gas washing and purifying device is shown in figure 1 and comprises a purifying box 1, an air inlet pipe 2 arranged at the top of the purifying box 1 and communicated with the purifying box 1 and used for introducing high-temperature flue gas containing SO2, a circulating tank 3 arranged at the bottom of the purifying box 1 and used for recovering dilute sulfuric acid sprayed in spray and recycling the dilute sulfuric acid, an exhaust pipe 4 arranged on the side surface of the purifying box 1 and communicated with the circulating tank 3 and used for introducing clean SO2 gas into other devices, a cooling combination 5 arranged on the other side of the purifying box 1 and communicated with the circulating tank 3 and used for reducing the temperature of acid liquor, a spray combination 6 communicated with the cooling combination 5 and used for continuously spraying low-temperature dilute sulfuric acid to purify flue gas and reducing the temperature of SO 2; and the exhaust pipe 4 is provided with and communicated with an electrostatic demisting device 41 for eliminating acid mist formed in the purification process and protecting other equipment.

The purification box 1 comprises a box body 11, a dustproof filter screen 12 arranged at the top of the box body 11 and used for filtering dust and large particles, an activated carbon layer 13 arranged below the dustproof filter screen 12 and used for adsorbing dust and other harmful gases in smoke colors, a hollowed-out support 14 arranged below the activated carbon layer 13, two motor bases 15 which are symmetrically arranged and arranged on the hollowed-out support 14, an air draft motor 16 arranged on the motor bases 15, a washing chamber 17 arranged below the hollowed-out support 14, a filling layer 18 arranged at the lower end of the washing chamber 17, hollow polyhedral balls 19 arranged in the filling layer 18, and a gap formed between a multi-year structure of the hollow polyhedral balls 19 and a plurality of hollow polyhedral balls 19 so that dilute sulfuric acid mist forms liquid drops and adheres to the hollow polyhedral balls 19, thereby fully contacting with the flue gas and improving the purification efficiency; the top of the draft motor 16 is provided with a draft fan blade 161.

The spraying combination 6 comprises a spraying main pipe 61, a plurality of spray heads 62 which are arranged at the lower end of the spraying main pipe 61 and are arranged at equal intervals, a three-way joint 63 arranged at one end of the spraying main pipe 61, an acid adding pipe 64 arranged at the upper end of the three-way joint 63, and an acid adding pump 65 arranged on the acid adding pipe 64 and used for supplementing dilute sulfuric acid; the cooling combination 5 comprises a circulating pipe 51, a circulating pump 52 arranged on the circulating pipe 51, a cooling row 53 arranged at one end of the circulating pipe 51 and communicated with the circulating pipe 51, and a liquid outlet pipe 54 arranged at one side of the upper end of the cooling row 53, wherein one end of the liquid outlet pipe 54 is communicated with the three-way joint 63; the cooling bar 53 is provided with heat dissipation fins 531, and the heat dissipation area of the cooling bar 53 is increased by using the heat dissipation fins 531, so that the temperature of the dilute sulfuric acid is reduced.

In the embodiment, the model of the acid adding pump 65 is 40FP-18, the model of the circulating pump 52 is 50FPZ-28, the model of the air draft motor 16 is YE2-160M2-8, and the model of the electrostatic defogging device 41 is HMC-32.

The working principle is as follows: firstly, the flue gas enters the purifying box 1 from the air inlet pipe 2, the dustproof filter screen 12 is firstly utilized to filter the flue gas for the first time, a large amount of dust in the flue gas is filtered, then the flue gas enters the activated carbon layer 13, the activated carbon layer 13 is utilized to adsorb harmful gas in the flue gas, and the dust in the flue gas is further absorbed.

Then, the flue gas is blown into the washing chamber 17 under the action of the air draft motor 16 and the air draft fan blade 161, and is fully mixed with the dilute sulfuric acid sprayed from the spray combination 6 in the washing chamber 17, the dilute sulfuric acid is used for absorbing harmful gases in the flue gas, the dilute sulfuric acid is used for absorbing the heat of the flue gas, and the temperature of SO2 is reduced; the cooled SO2 enters the electrostatic defogging device 41 in the exhaust pipe 4, the electrostatic defogging device 41 is used for adsorbing acid mist in the SO2 gas to protect other equipment, and then the SO2 gas enters the subsequent process through the exhaust pipe 4.

The dilute sulfuric acid is sprayed out of the spray assembly 6, absorbs heat of flue gas, and then drops into the circulation tank 3, the circulation pump 52 pumps high-temperature dilute hydrochloric acid in the circulation tank 3 into the cooling row 53, the cooling row 53 and the heat dissipation fins 531 are used for increasing the heat dissipation area, so that the dilute sulfuric acid is cooled, then the dilute sulfuric acid flows back to the spray assembly 6 through the liquid outlet pipe 54 to be sprayed out again, and the acid adding pump 65 is used for adding fresh acid to keep the concentration of the dilute sulfuric acid.

Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.

Claims

1. A sulfuric acid production flue gas washing and purifying device comprises a purifying box, an air inlet pipe arranged at the top of the purifying box and communicated with the purifying box, a circulating groove arranged at the bottom of the purifying box, an exhaust pipe arranged on the side surface of the purifying box and communicated with the circulating groove, a cooling combination arranged on the other side of the purifying box and communicated with the circulating groove, and a spraying combination communicated with the cooling combination; the method is characterized in that: the purifying box includes the box, sets up the dustproof filter screen at box top sets up the active carbon layer of dustproof filter screen below sets up the fretwork support of active carbon layer below sets up on the fretwork support, for two motor cabinets that the symmetry set up, set up air draft motor on the motor cabinet sets up the washing room of fretwork support below sets up the filling layer of washing room lower extreme sets up the intraformational hollow many-sided ball that is used for promoting the washing effect of filling.

2. The sulfuric acid production flue gas washing and purifying equipment as claimed in claim 1, wherein: and an exhaust fan blade is arranged at the top of the exhaust motor.

3. The sulfuric acid production flue gas washing and purifying equipment as claimed in claim 1, wherein: the cooling combination comprises a circulating pipe, a circulating pump arranged on the circulating pipe, a cooling row arranged at one end of the circulating pipe and communicated with the circulating pipe, and a liquid outlet pipe arranged at one side of the upper end of the cooling row.

4. The sulfuric acid production flue gas washing and purifying equipment as claimed in claim 3, wherein: and the cooling row is provided with heat dissipation fins.

5. The sulfuric acid production flue gas washing and purifying equipment as claimed in claim 1, wherein: the spraying combination comprises a spraying main pipe, a plurality of spray heads which are arranged at the lower end of the spraying main pipe and are arranged at equal intervals, a three-way joint arranged at one end of the spraying main pipe, an acid adding pipe arranged at the upper end of the three-way joint, and an acid adding pump arranged on the acid adding pipe.

6. The sulfuric acid production flue gas washing and purifying equipment as claimed in claim 1, wherein: and the exhaust pipe is provided with and communicated with an electrostatic demisting device.