CN212639958U - Energy-saving hydrogen fluoride production system - Google Patents
Energy-saving hydrogen fluoride production system Download PDFInfo
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- CN212639958U CN212639958U CN202021309546.2U CN202021309546U CN212639958U CN 212639958 U CN212639958 U CN 212639958U CN 202021309546 U CN202021309546 U CN 202021309546U CN 212639958 U CN212639958 U CN 212639958U
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Abstract
The utility model discloses an energy-saving hydrogen fluoride's production system, converter reactor system including concentrated sulfuric acid and fluorite powder reaction, be arranged in carrying out the rectifying column system of purification, be used for right the thick hydrogen fluoride that generates in the converter reactor system lime neutralization system that the waste liquid of converter reactor system goes on neutralization treatment and be used for with the degassing tower system that further purification was carried out to rectifying column top product carries out recycle's absorption tower system with being used for carrying out the rectifying column bottom product. In the application, the condensed water can be used for condensing the hydrogen fluoride in the tower top condenser, the condensed water after heat exchange is stored, and the condensed water is communicated with domestic water through a pipeline or is recycled for condensation and utilization after being cooled, so that the heat energy is fully utilized; in addition, the condensed water is clear water and does not contain salt, so that the heated condensed water can be supplemented to the rectifying tower, and the effects of saving energy and water are achieved.
Description
Technical Field
The utility model relates to a hydrogen fluoride production technical field especially relates to an energy-saving hydrogen fluoride's production system.
Background
The reaction of sulfuric acid with fluorite utilizes the strong acidity and the low volatility of concentrated sulfuric acid, and the reaction generates a large amount of heat. Hydrogen fluoride, also known as hydrofluoric acid, is the foundation of the fluorine chemistry industry, and China is the largest world producing hydrogen fluoride. At present, all countries in the world basically adopt fluorite and sulfuric acid to react to prepare hydrogen fluoride because the fluorite and the sulfuric acid have the advantages of easily available raw materials, large and stable supply amount and mature and reliable large-scale industrial production technology.
Wherein the production system of the conventional technology is as follows: a. conveying fluorite to a fluorite storage bin from the fluorite powder dried by the flotation plant; the dust gas is exhausted through a cyclone separator and a bag type dust collector, and the fluorite powder in the fluorite storage bin is metered and is conveyed to a rotary reaction furnace by a speed regulating screw; b. sending oleum and sulfuric acid which is absorbed HF in tail gas by a sulfuric acid absorption tower to an acid mixing tank, and mixing the oleum and the sulfuric acid with dilute acid from a washing tower; c. the mixed acid enters a rotary reaction furnace; flue gas for a rotary reaction furnace is indirectly heated by a jacket to meet the heat required by the reaction. The slag discharged from the furnace tail is neutralized with excessive acid by slaked lime and then is sent to a slag storage hopper by a slag elevator; d. the product gas of the reaction firstly enters a dust remover and a washing tower for dust removal and cooling, and then sequentially enters a primary cooler, an HF primary condenser and an HF secondary condenser. e. Returning the condensate obtained in the primary cooler to the washing tower; the condensate obtained in the HF condenser enters a rectifying tower through a crude HF storage tank to remove H2SO4、H2O and other heavy components; f. the residue in the rectifying tower returns to the washing tower; the distillate at the top of the tower enters a degassing tower to remove SO2、SiF4And light components are obtained. The liquid in the degassing tower is a product; g. the uncondensed gas of the HF secondary condenser and the uncondensed gas discharged from the top of the degassing tower enter a sulfuric acid absorption tower together, most of HF is absorbed by sulfuric acid, and then the uncondensed gas enters a first washing tower and a second washing tower in sequence to generate fluosilicic acid; h. the unabsorbed gas enters the tail gas tower, most of the acid gas in the tail gas tower is washed away, and the unabsorbed gas is exhausted. And (4) conveying the washing liquid of the tail gas tower and the ground washing acidic water to a waste liquid treatment device, and discharging the qualified sewage after treatment into a drainage system.
However, the condensers at the top of the rectification tower and the degassing tower in the normal pressure process both need to be condensed by adopting chilled water, and the chilled water needs to consume a large amount of electric energy, so that the condensers of the two towers account for a large proportion of the energy consumption of the hydrogen fluoride device.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an energy-saving hydrogen fluoride's production system solves among the conventional production system condenser and all need adopt the refrigerated water to condense, consumes more energy to and contain the problem that a large amount of salt makes the water after the heat transfer can not directly utilize in the condensate.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides an energy-saving hydrogen fluoride production system, which comprises a converter reactor system for the reaction of concentrated sulfuric acid and fluorite powder, a rectifying tower system for purifying crude hydrogen fluoride generated in the converter reactor system, a lime neutralizing system for neutralizing waste liquid of the converter reactor system, a degassing tower system for further purifying products at the top of the rectifying tower, and an absorption tower system for recycling products at the bottom of the rectifying tower; the rectification tower system and the degassing tower system respectively comprise a rectification tower, a crude hydrogen fluoride feeding hole positioned in the middle of the rectification tower, and a tower top steam conveying pipe positioned at the top of the rectification tower, wherein the tower top steam conveying pipe is condensed and purified through a condenser to obtain a refined hydrogen fluoride product; wherein the condensate in the condenser is communicated with the top of the rectifying tower through a condensate return pipe; the cold source of the condenser is to provide condensed water through the delivery pump, the condensed water is conveyed into the rectification water supply storage tank through the pipeline by the temperature rising water subjected to heat exchange by the condenser, and the make-up water in the rectification water supply storage tank is quantitatively conveyed through the delivery pump.
Further, the boiling point temperature of the hydrogen fluoride in the rectifying tower is higher than 50 ℃ after the pressure is increased.
Still further, the condensed water is normal temperature water.
Still further, the rectification feed water storage tank provides domestic hot water for factories or serves as recycled condensed water through pipe fittings and a water pump.
Still further, a condensation liquid collecting tank is arranged at the bottom of the condenser, and the condensation return pipe is communicated with the top of the rectifying tower.
Still further, the refined hydrogen fluoride product is a raw material directly used for producing aluminum fluoride or ammonium fluoride.
Compared with the prior art, the utility model discloses a beneficial technological effect: in the application, the condensed water can be used for condensing the hydrogen fluoride in the tower top condenser, the condensed water after heat exchange is stored, and the condensed water is communicated with domestic water through a pipeline or is recycled for condensation and utilization after being cooled, so that the heat energy is fully utilized; in addition, the condensed water is clear water and does not contain salt, so that the heated condensed water can be supplemented to the rectifying tower, and the effects of saving energy and water are achieved.
Drawings
The present invention will be further explained with reference to the following description of the drawings.
FIG. 1 is a schematic view of the main flow of the energy-saving hydrogen fluoride production system of the present invention;
fig. 2 is a schematic view of the rectification process of the energy-saving hydrogen fluoride production system of the present invention.
Description of reference numerals: 1. a crude hydrogen fluoride feed inlet; 2. a rectifying tower; 3. a tower top steam pipe; 4. a condenser; 5. a refined hydrogen fluoride product; 6. a condensing reflux pipe; 7. condensing water; 8. a rectification feed water storage tank; 9. a delivery pump.
Detailed Description
As shown in fig. 1-2, this embodiment discloses an energy-saving hydrogen fluoride production system, which includes a converter reactor system for reacting concentrated sulfuric acid with fluorite powder, a rectifying tower system for purifying crude hydrogen fluoride generated in the converter reactor system, a lime neutralizing system for neutralizing waste liquid of the converter reactor system, a degassing tower system for further purifying the top product of the rectifying tower, and an absorption tower system for recycling the bottom product of the rectifying tower; the rectification tower system and the degassing tower system respectively comprise a rectification tower 2, a crude hydrogen fluoride feeding hole 1 positioned in the middle of the rectification tower 2, and a tower top steam conveying pipe 3 positioned at the top of the rectification tower 2, wherein the tower top steam conveying pipe 3 is condensed and purified through a condenser 4 to obtain a refined hydrogen fluoride product 5, namely, hydrogen fluoride gas can be directly connected into a reaction system of ammonium fluoride or aluminum fluoride in series, so that the co-production capacity of a factory is improved; wherein the condensed liquid in the condenser 4 is communicated with the top of the rectifying tower 2 through a condensate return pipe 6; the cold source of condenser 4 is for providing comdenstion water 7 through the delivery pump, comdenstion water 7 passes through the intensification water that condenser 4 carried out the heat transfer passes through the pipeline and carries 8 in the rectification feed water storage tank, the feed water carries out the ration through delivery pump 9 in the rectification feed water storage tank 8 and carries out the ration.
In this embodiment, the distillation column needs to be pressurized, specifically, the rising steam amount in the column is changed by controlling the power of the column bottom, the reflux amount at the top of the column also has an influence on the column pressure, the reflux amount is large, the liquid level on the column plate is high, the pressure drop is large, and the pressure in the column rises, so that the boiling point of the hydrogen fluoride in the distillation column 2 is increased to reach more than 50 ℃; the condensed water 7 is normal temperature clear water, so that the problem that a large amount of energy is consumed by adding saturated salt water in order to reduce the temperature of the condensed water is avoided. The rectification feed water storage tank (8) provides domestic hot water for a factory through a pipe fitting and a water pump or is used as condensate water 7 for recycling, so that the heat of the condensate water after heat exchange can be supplemented into the rectification tower 2, and the condensate water can be used as domestic water for workers of a chemical factory and can be subjected to long-time cooling so as to be supplemented into the condensate water 7 for recycling; wherein corresponding water pumps and pipes are installed specifically according to the water supply needs. A condensation liquid collecting tank is arranged at the bottom of the condenser 4, and the condensation return pipe 6 is communicated with the top of the rectifying tower 2; the refined hydrogen fluoride product 5 is a raw material directly used for producing aluminum fluoride or ammonium fluoride, and achieves convenient poly-generation.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used for convenience of description only, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above embodiments are only for describing the preferred mode of the invention, and are not intended to limit the scope of the invention, and various modifications and improvements made to the technical solution of the invention by those skilled in the art without departing from the spirit of the invention should fall within the protection scope defined by the claims of the invention.
Claims (6)
1. An energy-saving hydrogen fluoride production system is characterized in that: the system comprises a converter reactor system for reacting concentrated sulfuric acid with fluorite powder, a rectifying tower system for purifying crude hydrogen fluoride generated in the converter reactor system, a lime neutralizing system for neutralizing waste liquid of the converter reactor system, a degassing tower system for further purifying products at the top of the rectifying tower and an absorption tower system for recycling products at the bottom of the rectifying tower; the rectification tower system and the degassing tower system respectively comprise a rectification tower (2), a crude hydrogen fluoride feeding hole (1) positioned in the middle of the rectification tower (2), and a tower top steam conveying pipe (3) positioned at the top of the rectification tower (2), wherein the tower top steam conveying pipe (3) is condensed and purified through a condenser (4) to obtain a refined hydrogen fluoride product (5); wherein the condensate in the condenser (4) is communicated with the top of the rectifying tower (2) through a condensate return pipe (6); the cold source of condenser (4) is for providing comdenstion water (7) through the delivery pump, comdenstion water (7) pass through condenser (4) carry out the intensification water of heat transfer and carry in rectification feed water storage tank (8) through the pipeline, make up water and carry out the ration through delivery pump (9) in rectification feed water storage tank (8).
2. The energy-saving hydrogen fluoride production system according to claim 1, characterized in that: after the pressure is increased, the boiling point temperature of the hydrogen fluoride in the rectifying tower (2) is more than 50 ℃.
3. The energy-saving hydrogen fluoride production system according to claim 1, characterized in that: the condensed water (7) is normal temperature water.
4. The energy-saving hydrogen fluoride production system according to claim 1, characterized in that: the rectification feed water storage tank (8) provides domestic hot water for factories or serves as recycled condensed water (7) through pipe fittings and a water pump.
5. The energy-saving hydrogen fluoride production system according to claim 1, characterized in that: and a condensation liquid collecting tank is arranged at the bottom of the condenser (4), and the condensation return pipe (6) is communicated with the top of the rectifying tower (2).
6. The energy-saving hydrogen fluoride production system according to claim 1, characterized in that: the refined hydrogen fluoride product (5) is a raw material directly used for producing aluminum fluoride or ammonium fluoride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021309546.2U CN212639958U (en) | 2020-07-07 | 2020-07-07 | Energy-saving hydrogen fluoride production system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021309546.2U CN212639958U (en) | 2020-07-07 | 2020-07-07 | Energy-saving hydrogen fluoride production system |
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| CN212639958U true CN212639958U (en) | 2021-03-02 |
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| CN202021309546.2U Active CN212639958U (en) | 2020-07-07 | 2020-07-07 | Energy-saving hydrogen fluoride production system |
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Address after: 067500 dongsanjia village, Pingquan Town, Pingquan City, Chengde City, Hebei Province Patentee after: Chengde Yingke Fine Chemical Co.,Ltd. Address before: 067500 dongsanjia village, Pingquan Town, Pingquan City, Chengde City, Hebei Province Patentee before: CHENGDE YINGKE FINE CHEMICAL CO.,LTD. |
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