CN113144865A - High-concentration SO2Sulfuric acid recovery device for tail gas of mining furnace - Google Patents
High-concentration SO2Sulfuric acid recovery device for tail gas of mining furnace Download PDFInfo
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- CN113144865A CN113144865A CN202110409946.3A CN202110409946A CN113144865A CN 113144865 A CN113144865 A CN 113144865A CN 202110409946 A CN202110409946 A CN 202110409946A CN 113144865 A CN113144865 A CN 113144865A
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- heat exchanger
- tail gas
- sulfuric acid
- desulfurizing tower
- hydrogen peroxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention relates to a high-concentration SO2The sulfuric acid recovery device for the tail gas of the mining furnace comprises a desulfurizing tower; the middle part of the desulfurizing tower is provided with a tubular heat exchanger, a cooling water channel is the shell pass of the tubular heat exchanger, a cooling water inlet is arranged at the lower part of one side of the tubular heat exchanger, and an outlet is arranged at the upper part of the other side of the tubular heat exchanger; the side wall of the desulfurizing tower is positioned below the tube type heat exchanger and is provided with a tail gas inlet; the side wall of the desulfurizing tower is positioned below the tail gas inlet and is externally connected with a circulating pipeline; the solution in the circulating pipeline is driven by a circulating pump, is introduced into the desulfurizing tower from the upper part of the tubular heat exchanger along the upper end of the circulating pipeline and passes through the coarse filterThe hollow nozzle of the desulfurization section sprays downwards; the circulating pipeline is externally connected with a hydrogen peroxide inlet and a dilute sulfuric acid outlet. Cooling water outside the tube passes through a heat exchanger independently arranged in the tower to react hydrogen peroxide and SO2The reaction heat is absorbed, so that the effects of reducing the temperature of the flue gas and improving the desulfurization efficiency are achieved.
Description
Technical Field
The invention relates to a sulfuric acid recovery device, in particular to high-concentration SO2A sulfuric acid recovery device for tail gas of a mining furnace belongs to the technical field of tail gas desulfurization of mining furnaces.
Background
In the prior art, industrial waste gas desulfurization is generally realized by adopting a spraying mode in a desulfurizing tower, and hydrogen peroxide and SO2Sulfuric acid is generated by the reaction, so hydrogen peroxide is also used for circulating in the desulfurizing tower to perform desulfurization in the prior art.
However, hydrogen peroxide and SO2A large amount of heat can be produced after the reaction, and the prior art generally absorbs the heat through circulating water flow, but the effect is not obvious, and the effect of reducing the temperature is difficult to achieve for the desulfurizing tower with smaller volume. For example, the publication is 2015, 5 and 6 days, and the publication is 2015, 5 and 6 days, which is named as "a novel hydrogen peroxide tail gas desulfurization device".
In addition, the prior art is directed to hydrogen peroxide and SO2The desulfurization mode of sulfuric acid generated by the reaction is limited by factors such as reaction heat release, and the desulfurization efficiency needs to be improved.
Disclosure of Invention
The invention aims to provide high-concentration SO2The sulfuric acid recovery device of the tail gas of the mining furnace absorbs reaction heat through the heat exchanger independently arranged in the tower, and achieves the effects of reducing the temperature of flue gas and improving the desulfurization efficiency.
The invention adopts the following technical scheme:
high-concentration SO2The sulfuric acid recovery device for the tail gas of the mining furnace comprises a desulfurizing tower; the middle part of the desulfurizing tower is provided with a tubular heat exchanger 1, a cooling water channel is the shell pass of the tubular heat exchanger 1, a cooling water inlet is arranged at the lower part of one side of the tubular heat exchanger, and an outlet is arranged at the upper part of the other side of the tubular heat exchanger; the side wall of the desulfurizing tower is positioned below the tube type heat exchanger 1 and is provided withA tail gas inlet is arranged; the side wall of the desulfurizing tower is positioned below the tail gas inlet and is externally connected with a circulating pipeline; the solution in the circulating pipeline is driven by a circulating pump, introduced into the desulfurizing tower from the upper part of the tubular heat exchanger 1 along the upper end of the circulating pipeline, and sprayed downwards through a hollow nozzle 2 of a rough desulfurizing section; the circulating pipeline is externally connected with a hydrogen peroxide inlet and a dilute sulfuric acid outlet.
Preferably, the hydrogen peroxide inlet is positioned above the dilute sulfuric acid outlet.
Preferably, the side wall of the desulfurizing tower is positioned above the coarse desulfurizing section hollow nozzle 2 and is also provided with a fine desulfurizing section hollow nozzle 3, and the fine desulfurizing section hollow nozzle 3 is externally connected with another hydrogen peroxide introducing port.
Further, the hydrogen peroxide inlet and the other hydrogen peroxide inlet are simultaneously communicated with a hydrogen peroxide source.
Preferably, the tubes in the shell and tube heat exchanger 1 have the same diameter and are arranged uniformly over the cross section.
Furthermore, the spray heads of the hollow nozzles 2 in the coarse desulfurization section are uniformly arranged in the cross section range.
Furthermore, the number of the spray heads of the fine desulfurization section hollow nozzle 3 is 4, and the spray heads are uniformly arranged at intervals of 90 degrees in the cross section range.
The invention has the beneficial effects that:
1) because the reaction of the hydrogen peroxide and the sulfuric acid is exothermic, in order to improve the desulfurization efficiency, cooling water outside the tube passes through a heat exchanger independently arranged in the tower to carry out the reaction of the hydrogen peroxide and the SO2The reaction heat is absorbed, so that the effects of reducing the temperature of the flue gas and improving the desulfurization efficiency are achieved.
2) Because the gas-liquid flow velocity in the tube nest is increased and is in a turbulent flow state, the gas-liquid contact area is increased, the reaction is more sufficient, and the desulfurization efficiency is improved; under the same desulfurization efficiency, the liquid-gas ratio is small, so that the operating cost of the circulating pump is reduced, and the energy is saved.
3) Contains trace SO after coarse desulfurization2The tail gas and the hydrogen peroxide sprayed by the hollow nozzle of the fine desulfurization section continue to react, and the fine desulfurization step can become a fine desulfurization step due to the cooling effect of the tubular heat exchangerFurther increase of SO2After the removal efficiency is reached, the waste gas is discharged into the atmosphere after reaching the standard.
Drawings
FIG. 1 shows high SO concentrations according to the invention2A process flow chart of a sulfuric acid recovery device for tail gas of a mining furnace.
FIG. 2 shows high SO concentration according to the present invention2The sulfuric acid recovery unit desulfurizing tower elevation of mining furnace kiln tail gas.
Fig. 3 is a sectional view a-a in fig. 2.
Fig. 4 is a sectional view B-B in fig. 2.
In the figure, 1 is a shell and tube heat exchanger, 2 is a hollow nozzle of a coarse desulfurization section, and 3 is a hollow nozzle of a fine desulfurization section.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to FIGS. 1-4, a high concentration SO2The sulfuric acid recovery device for the tail gas of the mining furnace comprises a desulfurizing tower; the middle part of the desulfurizing tower is provided with a tubular heat exchanger 1, a cooling water channel is the shell pass of the tubular heat exchanger 1, a cooling water inlet is arranged at the lower part of one side of the tubular heat exchanger, and an outlet is arranged at the upper part of the other side of the tubular heat exchanger; a tail gas inlet is formed in the position, below the tube type heat exchanger 1, of the side wall of the desulfurizing tower; the side wall of the desulfurization tower is positioned below a tail gas inlet and is externally connected with a circulating pipeline, a solution in the circulating pipeline is driven by a circulating pump, introduced into the desulfurization tower from the upper part of the tubular heat exchanger 1 along the upper end of the circulating pipeline, and is sprayed downwards through a rough desulfurization section hollow nozzle 2; the circulating pipeline is externally connected with a hydrogen peroxide inlet and a dilute sulfuric acid outlet.
In this embodiment, referring to fig. 1, the hydrogen peroxide solution inlet is located above the dilute sulfuric acid outlet.
In this embodiment, referring to fig. 1 and 2, a fine desulfurization section hollow nozzle 3 is further disposed on the sidewall of the desulfurization tower above the coarse desulfurization section hollow nozzle 2, and the fine desulfurization section hollow nozzle 3 is externally connected with another hydrogen peroxide solution introduction port. Referring to fig. 1, the hydrogen peroxide solution inlet and the other hydrogen peroxide solution inlet are simultaneously communicated with a hydrogen peroxide solution source.
In this embodiment, referring to fig. 3, the tubes in the shell and tube heat exchanger 1 are of the same diameter and are uniformly arranged across the cross-section.
In this embodiment, the hollow nozzles 2 of the rough desulfurization section are uniformly arranged in the cross section, which is not shown in the figure.
In this example, referring to fig. 4, the spray heads of the fine desulfurization section hollow nozzles 3 have 4 number, and are uniformly arranged at 90 ° intervals in the cross-sectional range.
The following are specific examples:
1. the source of the waste gas is as follows: and (4) tail gas of the mining furnace.
Exhaust gas to be treated: high concentration of SO2Mine kiln tail gas containing SO250000ppm (5%), offgas temperature 160 deg.C, SO in the offgas2High content, and the development of novel efficient SO is needed to realize the effective recycling of ultralow emission (< 35mg/Nm3) and resources2And a removing device.
2. Problems with existing exhaust systems.
The waste gas is directly discharged into the environment, which pollutes the environment and destroys the ecological balance.
3. Purpose of transformation
By passing high concentrations of SO2The sulfuric acid recovery device for the tail gas of the mining furnace purifies the tail gas and simultaneously recycles useful sulfuric acid solution.
The device is summarized as follows:
this is a high concentration SO2The sulfuric acid recovery device for the tail gas of the mining furnace can realize SO in the tail gas2The high-efficiency recycling of the tail gas is realized, and the SO in the tail gas is realized2And (4) ultralow emission. The device comprises:
the tail gas inlet is provided with the downstream tubular heat exchanger 1, referring to fig. 3, the gas flow is uniformly distributed, the liquid film is increased, the contact area is increased, and the reaction is more sufficient; under the same desulfurization rate, the liquid-gas ratio is small, the running cost of the circulating pump is low, and the energy is saved; at the same time, the cooling water outside the pipe takes away the hydrogen peroxide and the SO2The reaction heat, the reaction and the heat exchange are carried out simultaneously, so that the desulfurization efficiency is further improved;
the SO is further removed by nozzles arranged annularly in the upper part of the column, see FIG. 42；
A hollow nozzle 2 of the coarse desulfurization section, see fig. 1 and 2;
a fine desulfurization section hollow nozzle 3, see fig. 1, 2, 4;
considering the corrosivity of the circulating solution and the hydrogen peroxide, the carbon steel lining PTFE is adopted in the internal structure of the device and the nozzle.
The working process is as follows: high concentration SO from mining kilns2Tail gas firstly passes through a coarse desulfurization section, namely firstly enters a tube pass of a tube type heat exchanger, and fully reacts with a dilute sulfuric acid solution and a hydrogen peroxide solution sprayed from the upper part of a tube in the tube, because the gas-liquid flow velocity in the tube is increased, the gas-liquid flows through the tube in a turbulent flow state, the gas flow is uniformly distributed, the gas-liquid contact area is increased, the reaction is more full, the desulfurization efficiency is improved, the liquid-gas ratio is small under the same desulfurization rate, the operation cost of a circulating pump is low, and the energy is saved; because the reaction of the hydrogen peroxide and the sulfuric acid is exothermic, in order to improve the desulfurization efficiency, the cooling water outside the pipe takes away the hydrogen peroxide and the SO in a heat exchange mode2The heat of reaction of (1). The fine desulfurization section is arranged at the upper part of the coarse desulfurization section and is provided with a hydrogen peroxide jet nozzle 3 which is annularly arranged, and the coarse desulfurization section contains trace SO2The tail gas and the sprayed hydrogen peroxide continue to react to further remove SO2And the waste gas is discharged into the atmosphere after reaching the standard.
While the preferred embodiments of the present invention have been described, those skilled in the art will appreciate that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. High-concentration SO2The sulfuric acid recovery device for the tail gas of the mining furnace is characterized in that:
comprises a desulfurizing tower;
the middle part of the desulfurizing tower is provided with a tubular heat exchanger (1), a cooling water channel is the shell pass of the tubular heat exchanger (1), a cooling water inlet is arranged at the lower part of one side of the tubular heat exchanger, and an outlet is arranged at the upper part of the other side of the tubular heat exchanger;
the side wall of the desulfurizing tower is positioned below the tube type heat exchanger (1) and is provided with a tail gas inlet;
the side wall of the desulfurizing tower is positioned below the tail gas inlet and is externally connected with a circulating pipeline; the solution in the circulating pipeline is driven by a circulating pump, introduced into the desulfurizing tower from the upper part of the tubular heat exchanger (1) along the upper end of the circulating pipeline, and sprayed downwards through a hollow nozzle (2) of the coarse desulfurizing section;
the circulating pipeline is externally connected with a hydrogen peroxide inlet and a dilute sulfuric acid outlet.
2. The high concentration SO according to claim 12The sulfuric acid recovery device for the tail gas of the mining furnace is characterized in that: the hydrogen peroxide inlet is positioned above the dilute sulfuric acid outlet.
3. The high concentration SO according to claim 12The sulfuric acid recovery device for the tail gas of the mining furnace is characterized in that: the side wall of desulfurizing tower is located coarse desulfurization section hollow nozzle (2) top and still is equipped with fine desulfurization section hollow nozzle (3), fine desulfurization section hollow nozzle (3) external another hydrogen peroxide solution inlet.
4. The high concentration SO according to claim 12The sulfuric acid recovery device for the tail gas of the mining furnace is characterized in that: the hydrogen peroxide inlet and the other hydrogen peroxide inlet are simultaneously communicated with a hydrogen peroxide source.
5. The high concentration SO according to claim 12The sulfuric acid recovery device for the tail gas of the mining furnace is characterized in that: the diameters of the pipelines in the shell and tube heat exchanger (1) are the same, and the pipelines are uniformly distributed in the cross section range.
6. The high concentration SO according to claim 52The sulfuric acid recovery device for the tail gas of the mining furnace is characterized in that: the spray heads of the hollow nozzles (2) of the coarse desulfurization section are uniformly arranged in the cross section range.
7. The high concentration SO according to claim 62The sulfuric acid recovery device for the tail gas of the mining furnace is characterized in that: the spray head of the fine desulfurization section hollow nozzle (3) is provided with 4And are uniformly arranged at 90 DEG intervals in the cross-sectional range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110409946.3A CN113144865A (en) | 2021-04-16 | 2021-04-16 | High-concentration SO2Sulfuric acid recovery device for tail gas of mining furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110409946.3A CN113144865A (en) | 2021-04-16 | 2021-04-16 | High-concentration SO2Sulfuric acid recovery device for tail gas of mining furnace |
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| CN113144865A true CN113144865A (en) | 2021-07-23 |
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| CN202110409946.3A Pending CN113144865A (en) | 2021-04-16 | 2021-04-16 | High-concentration SO2Sulfuric acid recovery device for tail gas of mining furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130152A (en) * | 2021-10-28 | 2022-03-04 | 雷波凯瑞磷化工有限责任公司 | Device and method for cooling and recovering yellow phosphorus in yellow phosphorus tail gas |
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2021
- 2021-04-16 CN CN202110409946.3A patent/CN113144865A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130152A (en) * | 2021-10-28 | 2022-03-04 | 雷波凯瑞磷化工有限责任公司 | Device and method for cooling and recovering yellow phosphorus in yellow phosphorus tail gas |
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