CN211537229U - System for sulfur dioxide flue gas is handled and is recycled - Google Patents
System for sulfur dioxide flue gas is handled and is recycled Download PDFInfo
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- CN211537229U CN211537229U CN202020064280.3U CN202020064280U CN211537229U CN 211537229 U CN211537229 U CN 211537229U CN 202020064280 U CN202020064280 U CN 202020064280U CN 211537229 U CN211537229 U CN 211537229U
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Abstract
The utility model discloses a system of recycling is handled to sulfur dioxide flue gas, the discharge end that the device was prepared to alkali lye links to each other with circulating device's feed end, circulating device is as for absorbing device below and circulating device's cavity upper end and absorbing device's cavity lower extreme direct intercommunication, the circulating pump of circulating device's first discharge gate is linked together with the first feed inlet of absorbing device upper end, the second feed inlet and the sulfur dioxide input of absorbing device lower extreme are linked together, circulating device's second discharge gate is linked together with oxidizing device's feed inlet, oxidizing device's discharge gate is linked together with cobalt sulphur concentrate slurrying device's feed inlet, cobalt sulphur concentrate slurrying device's discharge gate is linked together with the feed inlet of fluidized bed furnace. Compared with the prior art, the utility model discloses having recycled after the oxidation treatment of waste liquid, its investment cost is less than the evaporative concentration of sodium sulfate waste liquid and handles, has still improved the sulfation conversion rate of non ferrous metal in the roasting of cobalt sulphur concentrate sulfuric acid process, has indirectly improved wherein non ferrous metal's rate of recovery.
Description
Technical Field
The utility model belongs to the technical field of sulphuric acid production, concretely relates to system that sulfur dioxide flue gas was handled and is recycled.
Background
Sulfuric acid is a raw material widely used in industry, and as the industry develops, the demand for sulfuric acid is also increasing. Since the twelve five years, the scale of a single series of sulfuric acid devices in China is continuously increased. However, in general, the current sulfuric acid industry in China is mainly dominated by small and medium-sized enterprises. The technical content in the production process of the sulfuric acid is low, the production process is laggard compared with that of developed countries in the world, energy and resources cannot be well utilized, the influence on the environment is large, and the load influence on social development is deep. With the continuous development of innovation, the price of the sulfuric acid product in China is already marketed. As mentioned above, the price of sulfuric acid has greatly fluctuated in recent years, and the difference between different regions is very large, and there are two main factors affecting the price of sulfuric acid: one is the supply and demand relationship and the other is the production cost. In order to thoroughly solve the current situation, improvement measures such as improving the production technology and increasing the development input are required to be taken, so that the process technology for producing the sulfuric acid can be comprehensively and efficiently utilized, and the like.
The process flow of two-conversion and two-absorption is commonly adopted in the production process of the sulfuric acid, and according to the current advanced technology, the conversion rate of the sulfur dioxide can reach 99.4 percent, so that a large amount of sulfur dioxide is still discharged in the production process. According to the current environmental protection requirement, a set of tail gas absorption device is needed, the production cost of enterprises is increased, the waste liquid after tail gas absorption is required to be treated, and the sewage treatment cost is increased.
Therefore, how to effectively reuse the waste liquid formed after tail gas absorption in the sulfuric acid production process becomes a problem which needs to be solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a system that sulfur dioxide flue gas was handled and is recycled to the characteristic of cobalt sulphur concentrate wet roasting, can be at slurrying in-process make full use of sulfur dioxide tail gas absorption liquid, to the characteristic of the sulfating calcination of cobalt sulphur concentrate, the effect that SO3 carrier can be played in the addition of sulfate, has improved the sulfated conversion rate of non ferrous metal in the cobalt sulphur concentrate. The utility model discloses a technical scheme be the circulation absorption liquid that adopts liquid caustic soda solution as the sulfur dioxide flue gas, absorb back reaction production sodium sulfite solution, the sodium sulfite solution that forms becomes sodium sulfate solution through oxidation treatment alright as the water of supplementing of cobalt sulphur concentrate slurrying process, send into the fluidized bed furnace together behind the control specific proportion and carry out sulfation calcination. Therefore, the recycling of the waste liquid can be realized, and the conversion rate of non-ferrous metals in the cobalt-sulfur concentrate is improved.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a system for treating and recycling sulfur dioxide flue gas comprises: the device comprises an alkali liquor preparation device, a circulating device, an absorption device, an oxidation device and a cobalt-sulfur concentrate slurrying device, wherein the discharge end of the alkali liquor preparation device is connected with the feed end of the circulating device, the circulating device is arranged below the absorption device, the upper end of a cavity of the circulating device is directly communicated with the lower end of the cavity of the absorption device, a circulating pump at a first discharge port of the circulating device is communicated with a first feed port at the upper end of the absorption device, a second feed port at the lower end of the absorption device is communicated with a sulfur dioxide input end, a second discharge port of the circulating device is communicated with a feed port of the oxidation device, a discharge port of the oxidation device is communicated with a feed port of the cobalt-sulfur concentrate slurrying device, and.
Preferably, the alkali liquor preparation device comprises an alkali liquor preparation tank, the alkali liquor preparation tank is provided with an alkali liquor inlet and a water inlet, the alkali liquor preparation tank is provided with a first stirring device, the first stirring device comprises a first stirring motor and a first stirring paddle, the stirring paddle is arranged in the alkali liquor preparation tank and is connected with an output shaft of the first stirring motor through a first stirring driving rod, the alkali liquor preparation tank is further provided with a first submerged pump connected with an alkali liquor output pipe, and the alkali liquor output pipe is connected with a feeding end of the circulating device as a discharging end of the alkali liquor preparation device.
Preferably, the circulating device comprises a circulating groove, the circulating groove is directly communicated with the lower end of the cavity of the absorbing device at the lower part of the absorbing device and at the upper end of the cavity of the circulating groove, an alkali liquor inlet is formed in the circulating groove, the alkali liquor inlet is connected with the discharge end of the alkali liquor preparation device as the feed end of the circulating groove, the circulating device further comprises a circulating pump, a first discharge port of the circulating groove is connected with the input end of the circulating pump, the output end of the circulating pump is communicated with a first feed port at the upper end of the absorbing device, a liquid level meter and an overflow port correspondingly arranged with the liquid level meter are further installed in the circulating groove, the overflow port is communicated with the outlet end of the blow-down valve, a second discharge port jointly used as the circulating device is communicated with.
Preferably, the absorption device comprises an absorption tower, a first feed inlet at the upper end of the absorption tower is communicated with the output end of the circulating pump, the first feed inlet at the upper end of the absorption tower is connected with a spraying device inside the absorption tower, an absorption section of the absorption tower is arranged below the spraying device, a second feed inlet is arranged below the absorption section, the second feed inlet is communicated with a sulfur dioxide input end through a first butterfly valve, the sulfur dioxide input end is also connected with an exhaust end through a second butterfly valve, and the top end of the absorption tower is connected with the exhaust end through a third butterfly valve.
Preferably, the oxidation device comprises an oxidation tank, the oxidation tank is provided with a feed inlet, the feed inlet is communicated with a second discharge port of the circulating device, the oxidation tank is further provided with an air inlet, the air inlet is connected with the atmosphere through an air blower, an exhaust pipe is transversely arranged below the liquid level in the oxidation tank, a plurality of exhaust holes are formed in the exhaust pipe at intervals, an inlet end of the exhaust pipe is connected with the air inlet, the oxidation tank is further provided with a second submerged pump connected with an oxidation output pipe, and the oxidation output pipe is communicated with the feed inlet of the cobalt-sulfur concentrate slurrying device as the discharge port of the oxidation device.
Preferably, cobalt sulphur concentrate slurrying device includes cobalt sulphur concentrate slurrying groove, the feed inlet on the cobalt sulphur concentrate slurrying groove is linked together with oxidation unit's discharge gate as the feed inlet of cobalt sulphur concentrate slurrying device, install second agitating unit on the cobalt sulphur concentrate slurrying groove, second agitating unit includes second agitator motor and second stirring rake, the second stirring rake setting links to each other through the output shaft of second agitator motor in the cobalt sulphur concentrate slurrying groove through the second stirring actuating lever, still be equipped with water inlet and cobalt sulphur concentrate charge door on the cobalt sulphur concentrate slurrying groove, the mortar pump that is connected with the mortar output tube is still installed to the cobalt sulphur concentrate slurrying groove, the mortar output tube is linked together with the feed inlet of fluidized bed furnace as the discharge gate of cobalt sulphur concentrate slurrying device.
The utility model discloses a sulfur dioxide gas in the tail gas in the sulphuric acid production process is absorbed to liquid caustic soda, and the waste liquid after the absorption carries out oxidation treatment, ensures that sodium sulfite wherein is whole to be changed into the sodium sulfate, and the waste liquid after the processing is sent into cobalt sulphur concentrate wet roasting system, carries out the acid method calcination with cobalt sulphur concentrate according to certain proportion modulation, has so both realized the cyclic utilization of waste liquid, has improved the conversion of non ferrous metal in the cobalt sulphur concentrate again. Compared with the prior art, the method has the following technical effects:
(1) the alkali liquor is used as the absorption liquid, so that the sulfur dioxide in the tail gas can be well absorbed completely, and the requirement of environmental protection is met.
(2) The absorbed waste liquid is easy to be reused after oxidation treatment, and the investment cost is lower than that of evaporation concentration treatment of sodium sulfate waste liquid;
(3) the sulfation conversion rate of the nonferrous metal in the roasting of the cobalt-sulfur concentrate by the acid method is improved, and the recovery rate of the nonferrous metal in the roasting is indirectly improved.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a system for treating and recycling sulfur dioxide flue gas disclosed by the utility model.
Description of reference numerals: the device comprises an alkali liquor configuration tank 1, a first stirring device 2, a first submerged pump 3, a circulating tank 4, a circulating pump 5, an overflow port 6, a liquid level meter 7, a blow-off valve 8, a water replenishing port 9, an absorption tower 10, a spraying device 11, a first butterfly valve 12, a second butterfly valve 13, a third butterfly valve 14, an oxidation tank 15, an air blower 16, an exhaust pipe 17, a second submerged pump 18, a cobalt-sulfur concentrate slurrying tank 19, a second stirring device 20 and a mortar pump 21.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses a system for sulfur dioxide flue gas is handled and is recycled, include: the device comprises an alkali liquor preparation device, a circulating device, an absorption device, an oxidation device and a cobalt-sulfur concentrate slurrying device, wherein the discharge end of the alkali liquor preparation device is connected with the feed end of the circulating device, the circulating device is arranged below the absorption device, the upper end of a cavity of the circulating device is directly communicated with the lower end of the cavity of the absorption device, a circulating pump 5 of a first discharge port of the circulating device is communicated with a first feed port of the upper end of the absorption device, a second feed port of the lower end of the absorption device is communicated with a sulfur dioxide input end, a second discharge port of the circulating device is communicated with a feed port of the oxidation device, a discharge port of the oxidation device is communicated with a feed port of the cobalt-sulfur concentrate slurrying device, and.
The working principle of the system is as follows: absorbing sulfur dioxide in the flue gas by using alkali liquor; pumping the prepared alkali liquor into an absorption liquid circulating tank 4, sending the alkali liquor into a tail gas absorption tower 10 through a circulating pump 5, enabling the alkali liquor to be in countercurrent contact with tail gas from the absorption tower 10 in the tail gas absorption tower 10, enabling sulfur dioxide in a gas phase to enter circulating absorption liquid and be absorbed to generate sodium sulfite, and discharging the tail gas from the top of the tower. Oxidizing the solution after absorbing the sulfur dioxide to convert sodium sulfite in the solution into sodium sulfate; and when the alkali liquor absorbs sulfur dioxide for a period of time, replacing new alkali liquor, replacing the solution which absorbs sulfur dioxide, discharging the solution which absorbs sulfur dioxide into the oxidation tank 15, and introducing air for oxidation treatment to convert sodium sulfite in the solution into sodium sulfate. And (3) feeding the oxidized solution into a raw material working section of a cobalt-sulfur concentrate roasting system, and performing sulfating roasting in a fluidized bed furnace after the oxidized solution participates in cobalt-sulfur concentrate pulping. The utility model discloses a system provides the hardware basis for realizing above-mentioned method. The whole production process of the utility model is a mixed acid making method of pyrite and smelting flue gas, and the waste liquid obtained after the treatment of sulfur dioxide flue gas in the production process of sulfuric acid can be utilized in the acidification roasting of cobalt sulfide concentrate.
Compared with the prior art, the utility model discloses having recycled after the oxidation treatment of waste liquid, its investment cost is less than the evaporative concentration of sodium sulfate waste liquid and handles, has still improved the sulfation conversion rate of non ferrous metal in the roasting of cobalt sulphur concentrate sulfuric acid process, has indirectly improved wherein non ferrous metal's rate of recovery.
During the concrete implementation, the alkali lye preparation device includes alkali lye preparation tank 1, be equipped with liquid caustic soda import and water inlet on the alkali lye preparation tank 1, install first agitating unit 2 on the alkali lye preparation tank 1, first agitating unit 2 includes first agitator motor and first stirring rake, the stirring rake setting links to each other with first agitator motor's output shaft through first stirring actuating lever in alkali lye preparation tank 1, still install the first submerged pump 3 that is connected with the alkali lye output tube on the alkali lye preparation tank 1, the discharge end that the alkali lye output tube was as alkali lye preparation device links to each other with circulating device's feed end.
The utility model discloses well alkali lye can adopt sodium hydroxide solution, controls the concentration of alkali lye through the feed volume of liquid alkali import and water import.
During specific implementation, circulating device includes circulation tank 4, circulation tank 4 is as for absorbing device below and circulation tank 4's cavity upper end and absorbing device's cavity lower extreme direct intercommunication, be provided with the alkali lye import on circulation tank 4, the alkali lye import links to each other with the discharge end of alkali lye preparation device as circulation tank 4's feed end, circulating device still includes circulating pump 5, circulation tank 4's first discharge gate links to each other with circulating pump 5's input, circulating pump 5's output is linked together with the first feed inlet of absorbing device upper end, still install level gauge 7 in circulation tank 4 and the overflow mouth 6 that corresponds the setting with level gauge 7, overflow mouth 6 and blowoff valve 8's exit end intercommunication, the second discharge gate that is as circulating device jointly is linked together with oxidizing device's feed inlet, still be equipped with moisturizing mouth 9 on circulation tank 4.
The absorption tower 10 and the circulation tank 4 may be of the same cylindrical structure, the upper half being the absorption tower 10 and the lower half being the circulation tank 4. A water replenishment port 9 may be provided to adjust the concentration of the solution in the circulation tank 4 as the reaction proceeds. In addition, in order to ensure the smooth proceeding of the reaction, besides the solution after the reaction can be sent away through the blowoff valve 8, an overflow port 6 can be provided for discharging the excessive solution in the circulation tank 4.
During specific implementation, absorbing device includes absorption tower 10, the first feed inlet of absorption tower 10 upper end and circulating pump 5's output intercommunication, the first feed inlet of absorption tower 10 upper end links to each other with the inside spray set 11 of absorption tower 10, 11 below of spray set are the absorption section of absorption tower 10, the absorption section below is equipped with the second feed inlet, the second feed inlet is linked together through first butterfly valve 12 and sulfur dioxide input, the sulfur dioxide input still links to each other with the exhaust end through second butterfly valve 13, the 10 tops of absorption tower link to each other through 14 exhaust ends of third butterfly valve.
During specific implementation, the oxidation device comprises an oxidation tank 15, the oxidation tank 15 is provided with a feed inlet, the feed inlet is communicated with a second discharge hole of the circulating device, an air inlet is further arranged on the oxidation tank 15 and is connected with the atmosphere through an air blower 16, an exhaust pipe 17 is transversely arranged below the liquid level in the oxidation tank 15, a plurality of exhaust holes are formed in the exhaust pipe 17 at intervals, the inlet end of the exhaust pipe 17 is connected with the air inlet, a second submerged pump 18 connected with an oxidation output pipe is further arranged on the oxidation tank 15, and the oxidation output pipe is communicated with the feed inlet of the cobalt-sulfur concentrate slurrying device as the discharge hole of the oxidation device.
In order to rapidly and sufficiently oxidize the solution in the oxidation tank 15, the exhaust pipe 17 having a plurality of exhaust holes is provided in the lateral direction, so that the contact area between the solution and the air per unit time is increased.
During specific implementation, the cobalt-sulfur concentrate slurrying device comprises a cobalt-sulfur concentrate slurrying device 19, a feed inlet on the cobalt-sulfur concentrate slurrying device 19 is communicated with a discharge outlet of an oxidation device as the feed inlet of the cobalt-sulfur concentrate slurrying device, a second stirring device 20 is installed on the cobalt-sulfur concentrate slurrying device 19, the second stirring device 20 comprises a second stirring motor and a second stirring paddle, the second stirring paddle is arranged in the cobalt-sulfur concentrate slurrying device 19 and is connected with an output shaft of the second stirring motor through a second stirring driving rod, a water inlet and a cobalt-sulfur concentrate feeding port are further formed in the cobalt-sulfur concentrate slurrying device 19, a mortar pump 21 connected with a mortar output pipe is further installed in the cobalt-sulfur concentrate slurrying device 19, and the mortar output pipe is communicated with the feed inlet of the fluidized bed furnace as the discharge outlet of the cobalt-sulfur concentrate.
In order to ensure that the cobalt-sulfur concentrate can be smoothly conveyed away by the mortar ore after reaction, the mortar concentration is required to be within a proper range, and therefore, a water inlet is further arranged on the cobalt-sulfur concentrate slurrying tank 19 and used for adjusting the mortar concentration.
Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, while the invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A system for treating and recycling sulfur dioxide flue gas is characterized by comprising: the device comprises an alkali liquor preparation device, a circulating device, an absorption device, an oxidation device and a cobalt-sulfur concentrate slurrying device, wherein the discharge end of the alkali liquor preparation device is connected with the feed end of the circulating device, the circulating device is arranged below the absorption device, the upper end of a cavity of the circulating device is directly communicated with the lower end of the cavity of the absorption device, a circulating pump at a first discharge port of the circulating device is communicated with a first feed port at the upper end of the absorption device, a second feed port at the lower end of the absorption device is communicated with a sulfur dioxide input end, a second discharge port of the circulating device is communicated with a feed port of the oxidation device, a discharge port of the oxidation device is communicated with a feed port of the cobalt-sulfur concentrate slurrying device, and.
2. The system for treating and recycling sulfur dioxide flue gas as recited in claim 1, wherein the alkali solution preparation device comprises an alkali solution preparation tank, the alkali solution preparation tank is provided with an alkali solution inlet and a water inlet, the alkali solution preparation tank is provided with a first stirring device, the first stirring device comprises a first stirring motor and a first stirring paddle, the stirring paddle is arranged in the alkali solution preparation tank and connected with an output shaft of the first stirring motor through a first stirring driving rod, the alkali solution preparation tank is further provided with a first submerged pump connected with an alkali solution output pipe, and the alkali solution output pipe is connected with a feed end of the circulating device as a discharge end of the alkali solution preparation device.
3. The system for treating and recycling sulfur dioxide flue gas as recited in claim 1, wherein the circulating device comprises a circulating tank, the circulating tank is disposed below the absorbing device, the upper end of the cavity of the circulating tank is directly communicated with the lower end of the cavity of the absorbing device, the circulating tank is provided with an alkali liquor inlet, the alkali liquor inlet is used as the feed end of the circulating tank and is connected with the discharge end of the alkali liquor preparation device, the circulating device further comprises a circulating pump, the first discharge port of the circulating tank is connected with the input end of the circulating pump, the output end of the circulating pump is communicated with the first feed port at the upper end of the absorbing device, the circulating tank is further provided with a level gauge and an overflow port corresponding to the level gauge, the overflow port is communicated with the outlet end of the blow-down valve and is used as the second discharge port of the circulating device and is communicated with.
4. The system for treating and recycling the sulfur dioxide flue gas as recited in claim 1, wherein the absorption device comprises an absorption tower, a first feed inlet at the upper end of the absorption tower is communicated with the output end of the circulating pump, the first feed inlet at the upper end of the absorption tower is connected with a spray device inside the absorption tower, an absorption section of the absorption tower is arranged below the spray device, a second feed inlet is arranged below the absorption section, the second feed inlet is communicated with the sulfur dioxide input end through a first butterfly valve, the sulfur dioxide input end is also connected with the exhaust end through a second butterfly valve, and the top end of the absorption tower is connected with the exhaust end through a third butterfly valve.
5. The sulfur dioxide flue gas treatment and recycling system according to claim 1, wherein the oxidation device comprises an oxidation tank, the oxidation tank is provided with a feed inlet, the feed inlet is communicated with the second discharge outlet of the circulating device, the oxidation tank is further provided with an air inlet, the air inlet is connected with the atmosphere through a blower, an exhaust pipe is transversely arranged below the liquid level in the oxidation tank, the exhaust pipe is provided with a plurality of exhaust holes at intervals, the inlet end of the exhaust pipe is connected with the air inlet, the oxidation tank is further provided with a second submerged pump connected with an oxidation output pipe, and the oxidation output pipe is communicated with the feed inlet of the cobalt-sulfur concentrate slurrying device as the discharge outlet of the oxidation device.
6. The system for treating and recycling sulfur dioxide flue gas as recited in claim 1, wherein the cobalt sulfur concentrate slurrying device comprises a cobalt sulfur concentrate slurrying tank, a feed inlet on the cobalt sulfur concentrate slurrying tank is communicated with a discharge outlet of the oxidation device as a feed inlet of the cobalt sulfur concentrate slurrying device, a second stirring device is installed on the cobalt sulfur concentrate slurrying tank, the second stirring device comprises a second stirring motor and a second stirring paddle, the second stirring paddle is arranged in the cobalt sulfur concentrate slurrying tank and is connected with an output shaft of the second stirring motor through a second stirring driving rod, the cobalt sulfur concentrate slurrying tank is further provided with a water inlet and a cobalt sulfur concentrate feeding port, the cobalt sulfur concentrate slurrying tank is further provided with a mortar pump connected with a mortar output pipe, and the mortar output pipe is communicated with the feed inlet of the fluidized bed furnace as the discharge outlet of the cobalt sulfur concentrate slurrying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020064280.3U CN211537229U (en) | 2020-01-13 | 2020-01-13 | System for sulfur dioxide flue gas is handled and is recycled |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020064280.3U CN211537229U (en) | 2020-01-13 | 2020-01-13 | System for sulfur dioxide flue gas is handled and is recycled |
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| CN211537229U true CN211537229U (en) | 2020-09-22 |
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| CN202020064280.3U Active CN211537229U (en) | 2020-01-13 | 2020-01-13 | System for sulfur dioxide flue gas is handled and is recycled |
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