Sulfur dioxide flue gas acid liquor recovery device

Abstract

The utility model relates to a sulfur dioxide flue gas acid liquor recovery device, which belongs to the technical field of non-ferrous metallurgy pyrometallurgy equipment, and comprises a flue gas pipeline, a half-month liquor collection box is fixedly arranged at the bottom of the flue gas pipeline, a liquor collection baffle is fixedly arranged on the inner bottom wall of the flue gas pipeline, a liquor discharge pipe is fixedly arranged at the bottom of the half-month liquor collection box, and the liquor discharge pipe is fixedly arranged on the bottom of the half-month liquor collection box. A wire mesh demister is fixedly installed on one side of the liquid collecting baffle, and a resistance reducing through hole is formed in one side of the wire mesh demister. According to the sulfur dioxide flue gas acid liquor recovery device, the liquid collection baffle is arranged in the flue gas pipeline, the half-month liquid collection box is arranged at the mounting opening in the bottom of the flue gas pipeline, the wire mesh demister is arranged on one side of the liquid collection baffle, flue gas is subjected to gas-liquid separation through the wire mesh demister, and after acid liquor in the flue gas is condensed on the liquid collection baffle, the acid liquor in the flue gas is recycled. And the flue gas freely falls into the half-month liquid collecting box and is discharged through the liquid discharging pipe, so that the acid liquid content in the flue gas is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to nonferrous metallurgy pyrometallurgy equipment technical field, concretely is a kind of sulfur dioxide flue gas acid liquid recovery device. BACKGROUND

[0002] Most of the raw materials are metal sulfides, such as zinc sulfide, lead sulfide, copper-iron sulfide, etc., which will release a large amount of sulfur dioxide in smelting, causing serious environmental pollution. When the SO2 concentration in flue gas is higher than 3.5%, the method of smelting flue gas for acid production can be used to turn waste into treasure, fully utilize resources, protect the environment and increase economic benefits. The smelting flue gas is produced into finished sulfuric acid through the processes of purification, dry absorption, conversion and tail gas desulfurization. With the improvement of environmental protection standards, the standards of particulate matter and SO2 content in desulfurization tail gas are becoming more and more strict. Under the condition of ensuring environmental protection requirements, ion liquid method, sodium alkali method and hydrogen peroxide method are widely used in flue gas desulfurization process.

[0003] In the treatment of smelting waste slag, due to the complex composition of waste slag and the large fluctuation of flue gas composition, the dosage of hydrogen peroxide and sodium alkali desulfurizer is large, the operation cost is high, the selection of ion liquid desulfurization cost will not increase significantly, and SO2 can be analyzed from the self-regeneration tower with a content of 99% SO2 flue gas, and returned to the previous process to continue producing sulfuric acid.

[0004] In the process of ion liquid desulfurization, the temperature of sulfur dioxide flue gas is as high as 300℃, and after dust removal and cooling in the purification process, the temperature is reduced to below 35℃. The water in the flue gas condenses and coagulates with acid mist particles to form condensed acid liquid. After electrostatic precipitation, most of the acid mist is removed. After drying the flue gas through the dry absorption process, it is sent to the conversion process. Finally, the flue gas carries a small amount of unconverted sulfur dioxide into the tail gas desulfurization. At this time, the flue gas still contains acid liquid, which enters the desulfurization and causes the pH of the ion liquid to decrease. Since the pH of the ion liquid should be kept between 5.0 and 5.4, alkali solution needs to be added to the ion liquid to ensure that the pH of the amine solution meets the standard. In this way, not only does it increase the cost of desulfurization, but it also leads to a continuous rise in salt content in the ion liquid, a decrease in the quality of the ion liquid, an increase in desulfurization efficiency and desulfurization cost, and a series of problems. In view of this, the present application proposes a sulfur dioxide flue gas acid liquid recovery device. UTILITY MODEL CONTENTS

[0005] In view of the shortcomings of the prior art, the sulfur dioxide flue gas acid liquid recovery device provided by the utility model has the advantages of recovering condensed acid liquid without increasing equipment and energy consumption, greatly saving desulfurization alkali and desulfurization ion liquid cost, etc. It solves the problem that the flue gas carries acid liquid, which enters the desulfurization and causes the pH of the ion liquid to decrease, so alkali solution needs to be added to the ion liquid to ensure that the pH of the amine solution meets the standard. In this way, not only does it increase the cost of desulfurization, but it also leads to a continuous rise in salt content in the ion liquid, a decrease in the quality of the ion liquid, an increase in desulfurization efficiency and desulfurization cost, and a series of problems.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of sulfur dioxide flue gas acid liquid recovery device, including flue gas pipeline, the bottom of the flue gas pipeline is fixedly installed with half moon liquid receiving box, the inner bottom wall of the flue gas pipeline is fixedly installed with liquid collecting baffle, the bottom of the half moon liquid receiving box is fixedly installed with liquid discharge pipe, one side of the liquid collecting baffle is fixedly installed with wire mesh demister, one side of the wire mesh demister is equipped with drag-reducing through-hole.

[0007] Further, the bottom third of the flue gas pipeline is provided with an installation opening, and the half moon liquid receiving box is installed at the installation opening.

[0008] Further, the liquid collecting baffle is located at the top of the half moon liquid receiving box near the outlet of the flue gas pipeline, and the wire mesh demister is located at the liquid collecting baffle near the inlet of the flue gas pipeline.

[0009] Further, the liquid discharge pipe is located at the lowest part of the half moon liquid receiving box, the liquid discharge pipe is in communication with the half moon liquid receiving box, and the surface of the liquid discharge pipe is fixedly installed with a liquid discharge valve.

[0010] Further, the liquid collecting baffle is located at the top of the half moon liquid receiving box near the outlet of the flue gas pipeline, and the wire mesh demister is located at the liquid collecting baffle near the inlet of the flue gas pipeline.

[0011] Further, the input end of the circulating fine tube is fixedly installed with an input pipe, and the input pipe extends through the flue gas pipeline to the inside of the circulating water tank.

[0012] Further, the output end of the circulating fine tube is fixedly installed with an output pipe, and the output pipe extends through the flue gas pipeline to the inside of the circulating water tank.

[0013] Further, the inner bottom wall of the circulating water tank is fixedly installed with a circulating pump, the output end of the circulating pump is in communication with the input pipe, the top of the circulating water tank is fixedly installed with a water replenishment pipe, and the bottom of the circulating water tank is fixedly installed with a drain pipe.

[0014] Compared with the prior art, the utility model provides a sulfur dioxide flue gas acid liquid recovery device, which has the following beneficial effects:

[0015] The sulfur dioxide flue gas acid liquid recovery device, through setting the liquid collecting baffle in the flue gas pipeline, setting the half moon liquid collecting box at the installation opening of the bottom of the flue gas pipeline, setting the wire mesh demister on one side of the liquid collecting baffle, the flue gas is separated into gas and liquid through the wire mesh demister, the acid liquid in the flue gas is condensed on the liquid collecting baffle and then freely falls into the half moon liquid collecting box, is discharged through the liquid discharge pipe, the content of the acid liquid in the flue gas is reduced, the problem that the flue gas entrains the acid liquid and enters the desulfurization to cause the pH of the ionic liquid to decrease is solved, therefore, the alkali liquid needs to be supplemented into the ionic liquid to ensure that the pH of the amine liquid reaches the standard, in this way, not only the desulfurization cost is increased, but also the salt content in the ionic liquid continuously rises, the quality of the ionic liquid decreases, the desulfurization efficiency and the desulfurization cost rise. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a structure schematic view of the utility model;

[0017] Fig. 2 It is a structure side view of the utility model;

[0018] Fig. 3 It is a circulation thin tube side view of the utility model;

[0019] Fig. 4 It is a flue gas pipeline three-dimensional view of the utility model.

[0020] In the drawing: 1, flue gas pipeline; 101, installation opening; 2, half moon liquid collecting box; 3, liquid collecting baffle; 4, liquid discharge pipe; 5, wire mesh demister; 6, resistance reduction through hole; 7, liquid discharge valve; 8, circulation thin tube; 81, input pipe; 82, output pipe; 9, circulation water tank; 10, circulation pump; 11, water supply pipe; 12, drain pipe. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] Embodiment one: please refer to Figs. 1 to 4The utility model provides a kind of sulfur dioxide flue gas acid liquid recovery device, including flue gas pipeline 1, the bottom of flue gas pipeline 1 is fixedly installed with half moon liquid receiving box 2, the inner bottom wall of flue gas pipeline 1 is fixedly installed with liquid collecting baffle 3, the bottom of half moon liquid receiving box 2 is fixedly installed with liquid discharge pipe 4, one side of liquid collecting baffle 3 is fixedly installed with wire mesh demister 5, and the side of wire mesh demister 5 is provided with drag reduction through-hole 6.Sulfur dioxide flue gas flows in flue gas pipeline 1, after passing through wire mesh demister 5, it flows to liquid collecting baffle 3, and the acid liquid in sulfur dioxide flue gas condenses on liquid collecting baffle 3 and then freely falls into half moon liquid receiving box 2, and is discharged through liquid discharge pipe 4, to reduce the content of acid liquid in sulfur dioxide flue gas.

[0023] Among them, the bottom one-third of flue gas pipeline 1 is provided with installation opening 101, and half moon liquid receiving box 2 is installed at installation opening 101.

[0024] Secondly, liquid collecting baffle 3 is located at the top of the side of half moon liquid receiving box 2 close to the outlet of flue gas pipeline 1, and wire mesh demister 5 is located at the side of liquid collecting baffle 3 close to the inlet of flue gas pipeline 1.

[0025] At the lowest point of liquid discharge pipe 4 in half moon liquid receiving box 2, liquid discharge pipe 4 is connected with half moon liquid receiving box 2, and a liquid discharge valve 7 is fixedly installed on the surface of liquid discharge pipe 4.

[0026] Meanwhile, a circulating fine tube 8 is fixedly installed on the side of liquid collecting baffle 3 close to the outlet of flue gas pipeline 1, and a circulating water tank 9 is fixedly installed on the bottom of flue gas pipeline 1.Circulating fine tube 8 is on the side of liquid collecting baffle 3, to cool liquid collecting baffle 3 and increase the condensation efficiency of liquid collecting baffle 3.

[0027] Among them, the input end of circulating fine tube 8 is fixedly installed with an input pipe 81, and the input pipe 81 extends through flue gas pipeline 1 to the inside of circulating water tank 9.

[0028] Secondly, the output end of circulating fine tube 8 is fixedly installed with an output pipe 82, and the output pipe 82 extends through flue gas pipeline 1 to the inside of circulating water tank 9.

[0029] Example two: please refer to Figs. 1 to 4 On the basis of example one, a circulating pump 10 is fixedly installed on the inner bottom wall of circulating water tank 9, the output end of circulating pump 10 is connected with input pipe 81, a water supply pipe 11 is fixedly installed on the top of circulating water tank 9, and a drain pipe 12 is fixedly installed on the bottom of circulating water tank 9.Circulating pump 10 outputs the condensed water in circulating water tank 9 to circulating fine tube 8, and then circulates to circulating water tank 9 through output pipe 82.

[0030] In use, the flue gas flows in the flue gas pipeline 1, and after passing through the wire mesh demister 5, flows to the liquid collecting baffle 3, and the acid liquid in the flue gas condenses on the liquid collecting baffle 3 and then freely falls into the half-moon liquid collecting box 2, is discharged through the liquid discharge pipe 4, and the acid liquid content in the flue gas is reduced, and the cost of the alkali for desulfurization and the desulfurization ion liquid is greatly saved.

[0031] The electrical components in the text are all electrically connected with the main controller and the power supply. The main controller can be a conventional known device such as a computer, and the existing disclosed power connection technology is not described in detail in the text.

[0032] It should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual such relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A sulfur dioxide flue gas acid liquid recovery device, comprising a flue gas pipeline (1), characterized in that: The bottom of the flue gas pipeline (1) is fixedly installed with a half-moon liquid collecting box (2), the inner bottom wall of the flue gas pipeline (1) is fixedly installed with a liquid collecting baffle (3), the bottom of the half-moon liquid collecting box (2) is fixedly installed with a liquid discharging pipe (4), one side of the liquid collecting baffle (3) is fixedly installed with a wire mesh demister (5), and one side of the wire mesh demister (5) is provided with a drag reduction through hole (6).

2. A device for recovering sulfur dioxide flue gas acid liquid according to claim 1, characterized in that: The bottom of the flue gas pipeline (1) is fixedly installed with a half-moon liquid collecting box (2), the inner bottom wall of the flue gas pipeline (1) is fixedly installed with a liquid collecting baffle (3), the bottom of the half-moon liquid collecting box (2) is fixedly installed with a liquid discharging pipe (4), one side of the liquid collecting baffle (3) is fixedly installed with a wire mesh demister (5), and one side of the wire mesh demister (5) is provided with a drag reduction through hole (6).

3. A device for recovering sulfur dioxide flue gas acid liquid according to claim 1, characterized in that: The bottom of the flue gas pipeline (1) is fixedly installed with a half-moon liquid collecting box (2), the inner bottom wall of the flue gas pipeline (1) is fixedly installed with a liquid collecting baffle (3), the bottom of the half-moon liquid collecting box (2) is fixedly installed with a liquid discharging pipe (4), one side of the liquid collecting baffle (3) is fixedly installed with a wire mesh demister (5), and one side of the wire mesh demister (5) is provided with a drag reduction through hole (6).

4. The device for recovering sulfur dioxide flue gas acid liquid according to claim 1, characterized in that: The bottom of the flue gas pipeline (1) is fixedly installed with a half-moon liquid collecting box (2), the inner bottom wall of the flue gas pipeline (1) is fixedly installed with a liquid collecting baffle (3), the bottom of the half-moon liquid collecting box (2) is fixedly installed with a liquid discharging pipe (4), one side of the liquid collecting baffle (3) is fixedly installed with a wire mesh demister (5), and one side of the wire mesh demister (5) is provided with a drag reduction through hole (6).

5. The device for recovering sulfur dioxide flue gas acid liquid according to claim 1, characterized in that: The bottom of the flue gas pipeline (1) is fixedly installed with a half-moon liquid collecting box (2), the inner bottom wall of the flue gas pipeline (1) is fixedly installed with a liquid collecting baffle (3), the bottom of the half-moon liquid collecting box (2) is fixedly installed with a liquid discharging pipe (4), one side of the liquid collecting baffle (3) is fixedly installed with a wire mesh demister (5), and one side of the wire mesh demister (5) is provided with a drag reduction through hole (6).

6. A sulphur dioxide off-gas acid liquid recovery apparatus according to claim 5, characterised in that: The bottom of the flue gas pipeline (1) is fixedly installed with a half-moon liquid collecting box (2), the inner bottom wall of the flue gas pipeline (1) is fixedly installed with a liquid collecting baffle (3), the bottom of the half-moon liquid collecting box (2) is fixedly installed with a liquid discharging pipe (4), one side of the liquid collecting baffle (3) is fixedly installed with a wire mesh demister (5), and one side of the wire mesh demister (5) is provided with a drag reduction through hole (6).

7. A sulphur dioxide off-gas acid liquid recovery apparatus according to claim 6, characterised in that: ​ 8. A sulphur dioxide off-gas acid liquid recovery apparatus according to claim 7, characterised in that: ​

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