CN212687569U - Equipment for producing high-concentration sulfuric acid or fuming sulfuric acid by dry-wet combination technology - Google Patents
Equipment for producing high-concentration sulfuric acid or fuming sulfuric acid by dry-wet combination technology Download PDFInfo
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- CN212687569U CN212687569U CN202021403328.5U CN202021403328U CN212687569U CN 212687569 U CN212687569 U CN 212687569U CN 202021403328 U CN202021403328 U CN 202021403328U CN 212687569 U CN212687569 U CN 212687569U
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Abstract
The utility model provides an equipment of dry and wet combination technique production high concentration sulphuric acid or fuming sulphuric acid, this equipment burn burning furnace, a heat exchanger, a reactor, No. two heat exchangers, the absorption tower, circulation acid pump and acid cooler connect gradually, be provided with the catalyst bed in the reactor, be provided with the absorption bed in the absorption tower, the absorption tower still is connected with wet process acid manufacturing device, the utilization comes from 97% ~ 98% concentrated sulfuric acid absorption SO3 of wet process acid manufacturing device, generate the concentrated sulfuric acid or the fuming sulphuric acid of higher concentration, for guaranteeing to have sufficient sulphuric acid to keep the inside filler surface's of absorption tower wet state, acid cooler still is connected with the absorption tower, acid cooler refrigerated acid reaches the higher concentration of needs and carries out outer transport again. The problem that the concentration of concentrated sulfuric acid produced by the existing wet-method acid production technology is only about 98% at most is solved, and the concentrated sulfuric acid or fuming sulfuric acid with higher concentration can be produced by taking liquid sulfur and 97% -98% concentrated sulfuric acid as raw materials through processes of incineration, reaction conversion, absorption and the like.
Description
Technical Field
The utility model relates to a dry-wet combination technology production high concentration sulphuric acid or fuming sulphuric acid's equipment belongs to production sulphuric acid technical field.
Background
At present, more technologies for producing concentrated sulfuric acid are adopted, and the technologies comprise two technologies: one is a "dry method" and one is a "wet method". The dry method technology can produce concentrated sulfuric acid with the concentration as high as 99.2 percent, but has the problems of large occupied area, high investment and device energy consumption, acid-containing wastewater generation and the like; the wet process technology has the advantages of short flow, small occupied area, low investment and energy consumption, no waste liquid discharge and the like, but the concentration of concentrated sulfuric acid produced by the technology is only about 98 percent at most.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that mentions among the above-mentioned background art, provide a dry and wet combination technique production high concentration sulphuric acid or the equipment of sulphuric acid of fuming, can use liquid sulphur and 97% ~ 98% concentrated sulfuric acid to produce high concentration concentrated sulfuric acid or sulphuric acid of fuming through processes such as burning, reaction conversion, absorption as the raw materials.
The utility model provides an equipment of dry and wet combination technique production high concentration sulphuric acid or sulfuric acid of fuming, including burning furnace, a heat exchanger, reactor, heat exchanger, absorption tower, circulation acid pump, acid cooler and wet process system acid device, burn burning furnace, a heat exchanger, reactor, No. two heat exchangers, absorption tower, circulation acid pump and acid cooler and connect gradually, be provided with the catalyst bed in the reactor, be provided with the absorption bed in the absorption tower, the absorption tower still is connected with wet process system acid device, utilizes 97% ~ 98% concentrated sulfuric acid absorption SO that comes from wet process system acid device3And generating concentrated sulfuric acid or fuming sulfuric acid with higher concentration, wherein the acid cooler is also connected with the absorption tower for ensuring that enough sulfuric acid keeps the wet state of the surface of the filler in the absorption tower, and the acid cooled by the acid cooler reaches the required higher concentration and is then conveyed outside.
Preferably, the reactor is an isothermal reactor.
Preferably, the adsorption tower is made of carbon steel lining soluble polytetrafluoroethylene, and foam glass filler is arranged in the adsorption tower.
Preferably, the catalyst bed in the reactor is placed with a vanadium-based catalyst, and SO is added2Conversion to SO3。
Preferably, the incinerator adopts a low-nitrogen incinerator to reduce NOx generated in the incineration process, and liquid sulfur is incinerated to become SO2。
Preferably, the temperature in the combustion chamber of the incinerator is controlled at an optimum reaction temperature of 1100 ℃ to 1200 ℃.
Preferably, the temperature in the combustion chamber of the incinerator is controlled at the optimal reaction temperature 1150 ℃.
The equipment for producing high-concentration sulfuric acid or fuming sulfuric acid by the dry-wet combination technology has the beneficial effects that:
(1) can produce concentrated sulfuric acid and fuming sulfuric acid with various concentrations: the flow of the liquid sulfur is adjusted to control the generation of concentrated sulfuric acid or fuming sulfuric acid with various concentrations.
(2) The device occupies small area: the efficient conversion, absorption and heat recovery device is adopted, the system is compact and reasonable in arrangement, the occupied area is small, and the device can be easily combined into the existing device of a refinery.
(3) The environmental protection index is high: tail gas at the top of the absorption tower is sent to a wet acid making device for further treatment, independent external emission is not needed, and finally the tail gas emission reaches SO2≤50mg/m3、NOx≤50mg/m3Acid mist is less than or equal to 5mg/m3(based on 3 percent of oxygen content), the national requirement on ultra-clean emission of the flue gas is met by integrating the emission indexes.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.
In the drawings:
FIG. 1 is a schematic diagram of a plant for producing high-concentration sulfuric acid or oleum by the wet and dry combination technique of the present invention;
in the figure: 1-an incinerator; 2-heat exchanger number one; 3-a reactor; 4-heat exchanger II; 5-an absorption tower; 6-circulating acid pump; 7-an acid cooler; 8-wet acid making device.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:
the first embodiment is as follows: the present embodiment is explained with reference to fig. 1. The equipment for producing high-concentration sulfuric acid or fuming sulfuric acid by the dry-wet combination technology comprises an incinerator 1 and a first heat exchanger2. The reactor 3, No. two heat exchangers 4, absorption tower 5, circulating acid pump 6, acid cooler 7 and wet process system acid device 8, burn burning furnace 1, No. 2 heat exchangers, reactor 3, No. two heat exchangers 4, absorption tower 5, circulating acid pump 6 and acid cooler 7 and connect gradually, be provided with the catalyst bed in the reactor 3, be provided with the absorption bed in the absorption tower 5, absorption tower 5 still is connected with wet process system acid device 8, utilizes 97% ~ 98% concentrated sulfuric acid from wet process system acid device 8 to absorb SO3And concentrated sulfuric acid or fuming sulfuric acid with higher concentration is generated, in order to ensure that enough sulfuric acid keeps the wet state of the surface of the packing in the absorption tower, the acid cooler 7 is also connected with the absorption tower 5, and the acid cooled by the acid cooler 7 reaches the required higher concentration and is then conveyed outside.
The reactor 3 adopts an isothermal reactor. The catalyst bed in the reactor 3 is placed with a vanadium-based catalyst, SO2Conversion to SO3。
The adsorption tower 5 is made of carbon steel lining soluble Polytetrafluoroethylene (PFA) and is internally provided with a foam glass filler.
The incinerator 1 adopts a low-nitrogen incinerator to reduce NOx generated in the incineration process, and liquid sulfur is burnt to form SO2。
The temperature in the combustion chamber of the incinerator 1 is controlled to be the optimum reaction temperature of 1100-1200 ℃. The temperature in the combustion chamber of the incinerator 1 was controlled at the optimum reaction temperature 1150 ℃.
The utility model relates to an utilize wet combination technique production high concentration sulphuric acid or fuming sulfuric acid's combined technology futilely, specifically speaking belong to and be applicable to and use 97% ~ 98% W concentrated sulfuric acid and liquid sulphur as the raw materials, adopt to burn + reaction conversion + concentrated sulfuric acid absorption and generate the chemical process of higher concentration sulphuric acid or fuming sulfuric acid. An advanced low-nitrogen incinerator is adopted, a vanadium-based catalyst is adopted in the reaction through a reactor and an absorption tower (one conversion and one absorption), a product (97-98% concentrated sulfuric acid) from a wet acid production device is adopted in an absorption system to obtain a fuming sulfuric acid product, tail gas at the top of the absorption tower is sent to the wet acid production device for further treatment, and finally tail gas emission meets the requirement of SO2≤50mg/m3、NOx≤50mg/m3Acid mist is less than or equal to 5mg/m3(based on 3% oxygen content).
The utility model adopts the low-nitrogen incinerator to burn, reduces NOx generated in the burning process, and liquid sulfur becomes SO after burning2(ii) a Arranging a vanadium-based catalyst in the reactor, passing the process gas through the vanadium-based catalyst, and reacting SO2Conversion to SO3An absorption bed layer is arranged in the absorption tower, and products (97-98 percent concentrated sulfuric acid) from a wet acid-making device are used for absorbing SO3And concentrated sulfuric acid or fuming sulfuric acid with higher concentration is generated.
The process of the utility model converts the liquid sulfur into SO3Absorbing SO by 97-98% concentrated sulfuric acid of a wet acid preparation device3The process is short, the occupied area is small, the exhaust emission index meets the most harsh environmental protection requirement, no waste liquid is discharged, the concentrated sulfuric acid or fuming sulfuric acid with various concentrations can be produced, and the requirements of users on the concentrated sulfuric acid or fuming sulfuric acid with different concentrations can be met.
The process of the equipment for producing the high-concentration sulfuric acid or the fuming sulfuric acid by the dry-wet combination technology specifically comprises the following steps:
(1) burning liquid sulfur in an incinerator 1, introducing dry air during burning, controlling the temperature in a combustion chamber of the incinerator 1 at an optimal reaction temperature of 1150 ℃, controlling the temperature of process gas at an outlet of the incinerator 1 at about 440 ℃ by a first heat exchanger 2, simultaneously recovering reaction heat, sending hot process gas into a reactor 3, and under the action of a catalyst, SO2Conversion to SO3Simultaneously, heat is released, the converted process gas recovers reaction heat through a second heat exchanger 4, the temperature of the process gas is reduced to about 110 ℃, and the cooled process gas enters an absorption tower 5;
(2) an absorption bed layer is arranged in the absorption tower 5, 97-98% concentrated sulfuric acid from the wet acid making device 8 is mixed with self-circulation acid and then is uniformly sprayed into the absorption tower from the top, cooled process gas enters the bottom of the absorption tower 5, and SO is arranged on the surface of a filling material of the absorption tower3Is absorbed by concentrated sulfuric acid to generate concentrated sulfuric acid with higher concentration or fuming sulfuric acid, and tail gas at the top of the absorption tower 5 is sent to a wet acid making device 8 for further treatment.
The index of the sulfuric acid product produced by the process of the utility model reaches:
the indexes of fuming sulfuric acid products produced by adopting the process of the utility model reach:
the second embodiment is as follows: the present embodiment is explained with reference to fig. 1.
The raw materials of the device are 200kg/h of liquid sulfur and 11905kg/h of sulfuric acid (97% w) from a wet-process acid preparation unit.
Burning raw material sulfur in an incinerator 1, using dry air for burning, controlling the temperature in the combustion chamber to about 1150 ℃ at the optimal reaction temperature, controlling the temperature of process gas at the outlet of the incinerator 1 to 440 ℃ by a first heat exchanger 2, simultaneously recovering reaction heat, sending the hot process gas into a reactor 3, arranging a bulk material vanadium catalyst bed layer in the reactor 3, and under the action of a catalyst, SO2Conversion to SO3And the conversion rate is 90 percent, heat is released at the same time, the converted process gas recovers reaction heat through a second heat exchanger 4, the temperature of the process gas is reduced to 110 ℃, and the cooled process gas enters an absorption tower 5 from the bottom of an adsorption tower.
An absorption bed layer is arranged in the absorption tower 5, and a product (97% concentrated sulfuric acid) from the wet acid-making device 8 is used as circulating acid of the absorption tower. The cooled process gas enters an absorption tower 5 from the bottom to contact with the circulating acid to absorb SO in the process gas312404kg/h of concentrated sulfuric acid (98% w) were produced. The tail gas at the top of the absorption tower is sent to a wet acid making device 8 for further treatment.
The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present invention in detail. It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the present invention, and that any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention may be made without departing from the scope of the present invention.
Claims (5)
1. The equipment for producing high-concentration sulfuric acid or fuming sulfuric acid by using the dry-wet combination technology is characterized by comprising an incinerator (1), a first heat exchanger (2), a reactor (3), a second heat exchanger (4), an absorption tower (5), a circulating acid pump (6), an acid cooler (7) and a wet acid production device (8), wherein the incinerator (1), the first heat exchanger (2), the reactor (3), the second heat exchanger (4), the absorption tower (5), the circulating acid pump (6) and the acid cooler (7) are sequentially connected, a catalyst bed layer is arranged in the reactor (3), an absorption bed layer is arranged in the absorption tower (5), the absorption tower (5) is further connected with the wet acid production device (8), and 97% -98% concentrated sulfuric acid from the wet acid production device (8) is used for absorbing SO3And concentrated sulfuric acid or fuming sulfuric acid with higher concentration is generated, in order to ensure that enough sulfuric acid keeps the wet state of the surface of the packing in the absorption tower, the acid cooler (7) is also connected with the absorption tower (5), and the acid cooled by the acid cooler (7) reaches the required concentration and is then conveyed outside.
2. Plant for the production of high-concentration sulfuric acid or oleum according to the dry-wet combination technique of claim 1, characterized in that the reactor (3) is an isothermal reactor.
3. The plant for the production of high-concentration sulfuric acid or oleum according to claim 1, characterized in that the absorption tower (5) is made of carbon steel lined with soluble polytetrafluoroethylene and filled with a foam glass filler.
4. Plant for the production of high-concentration sulfuric acid or oleum according to the dry-wet combined technology of claim 1, characterized in that the catalyst bed in the reactor (3) is placed with a vanadium-based catalyst, SO2Conversion to SO3。
5. The dry-wet combination technique of claim 1 to produce high consistencyThe device for preparing sulfuric acid or fuming sulfuric acid is characterized in that the incinerator (1) adopts a low-nitrogen incinerator to reduce NOx generated in the incineration process, and liquid sulfur is changed into SO after incineration2。
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| CN202021403328.5U CN212687569U (en) | 2020-07-16 | 2020-07-16 | Equipment for producing high-concentration sulfuric acid or fuming sulfuric acid by dry-wet combination technology |
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| CN202021403328.5U CN212687569U (en) | 2020-07-16 | 2020-07-16 | Equipment for producing high-concentration sulfuric acid or fuming sulfuric acid by dry-wet combination technology |
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Cited By (1)
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|---|---|---|---|---|
| CN111747381A (en) * | 2020-07-16 | 2020-10-09 | 哈尔滨博奥环境技术有限公司 | Equipment and process for producing high-concentration sulfuric acid or fuming sulfuric acid by dry-wet combined technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111747381A (en) * | 2020-07-16 | 2020-10-09 | 哈尔滨博奥环境技术有限公司 | Equipment and process for producing high-concentration sulfuric acid or fuming sulfuric acid by dry-wet combined technology |
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