CN108163824B - Absorption device for improving yellow phosphorus yield - Google Patents
Absorption device for improving yellow phosphorus yield Download PDFInfo
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- CN108163824B CN108163824B CN201810058055.6A CN201810058055A CN108163824B CN 108163824 B CN108163824 B CN 108163824B CN 201810058055 A CN201810058055 A CN 201810058055A CN 108163824 B CN108163824 B CN 108163824B
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- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 29
- 238000009833 condensation Methods 0.000 claims abstract description 120
- 230000005494 condensation Effects 0.000 claims abstract description 120
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 90
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 90
- 239000011574 phosphorus Substances 0.000 claims abstract description 90
- 239000006096 absorbing agent Substances 0.000 claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 64
- 239000007788 liquid Substances 0.000 claims description 25
- 239000007921 spray Substances 0.000 claims description 25
- 238000007670 refining Methods 0.000 claims description 16
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000006722 reduction reaction Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- UICBCXONCUFSOI-UHFFFAOYSA-N n'-phenylacetohydrazide Chemical compound CC(=O)NNC1=CC=CC=C1 UICBCXONCUFSOI-UHFFFAOYSA-N 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/02—Preparation of phosphorus
- C01B25/027—Preparation of phosphorus of yellow phosphorus
-
- 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an absorption device for improving yellow phosphorus yield, which comprises a thermal condensation tower, a secondary condensation tower and a dynamic wave absorber, wherein the thermal condensation tower is communicated with the secondary condensation tower, the secondary condensation tower is communicated with the dynamic wave absorber, meanwhile, the thermal condensation tower forms a loop through a thermal condensation tower circulating tank and a thermal condensation tower circulating pump, the secondary condensation tower forms a loop through a secondary condensation tower circulating tank and a secondary condensation tower circulating pump, and the dynamic wave absorber forms a loop with the dynamic wave absorber circulating pump and a cyclone; the device reduces the phosphorus content of the tail gas of the phosphorus furnace, improves the yield of yellow phosphorus, reduces the subsequent tail gas treatment load, and has the characteristics of small occupied area and reduction of the production cost of yellow phosphorus.
Description
Technical Field
The invention relates to an absorption device for improving yellow phosphorus yield, and belongs to the technical field of energy conservation and emission reduction in yellow phosphorus production.
Background
The production process of yellow phosphorus mainly comprises four parts of a yellow phosphorus electric furnace (phosphorus ore is reduced into elemental phosphorus, the elemental phosphorus is brought to a yellow phosphorus condensation working section from phosphorus furnace gas in a gas phase form), yellow phosphorus condensation (gaseous phosphorus vapor is absorbed by condensation of water and is changed into liquid state from gas phase), a yellow phosphorus refining system (condensed phosphorus is rinsed and refined by hot water to obtain a yellow phosphorus product with the phosphorus content of more than 99 percent and byproduct phosphorus mud), and phosphorus mud recovery (yellow phosphorus in the phosphorus mud is recovered by adopting a distillation method or a filtration method), wherein the basic process flow is as follows: weighing qualified block phosphorite, pyrodine and silica, and then conveying to a yellow phosphorus electric furnace bin; the mixed furnace burden enters a yellow phosphorus electric furnace through a discharging pipe, a reduction reaction occurs under the action of electric heat, generated furnace gas enters three condensing towers which are connected in series from an air duct on a furnace cover of the electric furnace, gaseous phosphorus is condensed into liquid crude phosphorus by spray water, the liquid crude phosphorus enters a collecting tank, the crude phosphorus is periodically siphoned into a refining tank to be rinsed and settled to obtain qualified yellow phosphorus, and the qualified yellow phosphorus is packaged into a product; the condensed tail gas is sent to a phosphorus furnace tail gas utilization section. And (5) filtering the mud phosphorus produced by refining and recycling yellow phosphorus in the mud phosphorus by a rotary pot. The phosphorus-containing wastewater generated in the production process is sent to a wastewater treatment station for neutralization treatment and then is recycled.
The existing condensing towers are hollow structures, the exhaust temperature of the phosphorus furnace tail gas is above 50 ℃, and as can be seen from fig. 1, the phosphorus content in the phosphorus furnace tail gas is up to 3g/Nm 3 at 50 ℃, and the loss of phosphorus per 1 ton of yellow phosphorus is up to 11-15kg, so that the cost of yellow phosphorus and the processing load of a post-system are increased, and the environment is polluted. Therefore, reducing the phosphorus content in the phosphorus furnace tail gas is one of the technical bottlenecks to be solved in yellow phosphorus industry.
Disclosure of Invention
The invention aims to reduce the yellow phosphorus content in the tail gas of the phosphorus furnace, improve the recovery rate of the yellow phosphorus, protect the environment, improve the integral clean production level of the yellow phosphorus production and reduce the production cost of the yellow phosphorus. The invention provides an absorption device for improving the yield of yellow phosphorus, which combines the technical principles of dynamic waves and a cyclone with the yellow phosphorus production technology, adopts a dynamic wave absorber to effectively reduce the gas temperature of the tail gas of a phosphorus furnace, and adopts a cyclone to effectively separate solid-phase yellow phosphorus at low temperature; compared with the traditional three-stage hollow condensing tower, the invention improves the absorption rate of yellow phosphorus and reduces the consumption of circulating absorption water; the equipment volume, the material consumption and the occupied area of the device are reduced, and the investment of the absorber is reduced.
The aim of the invention is achieved by the following technical scheme:
an absorption device for improving yellow phosphorus yield comprises a thermal condensation tower 1, a secondary condensation tower 2, a dynamic wave absorber 3, a thermal condensation tower circulation tank 4, a secondary condensation tower circulation tank 5, a cyclone 6, a thermal condensation tower circulation pump 7, a secondary condensation tower circulation pump 8 and a dynamic wave absorber circulation pump 9;
The gas inlet at the top of the thermal condensation tower 1 is communicated with the yellow phosphorus electric furnace tail gas outlet, and the gas outlet at the lower part of the thermal condensation tower 1 is communicated with the gas inlet at the lower part of the secondary condensation tower 2; the water outlet at the bottom of the thermal condensation tower 1 is communicated with the inlet of a thermal condensation tower circulating tank 4, the water outlet of the thermal condensation tower circulating tank 4 is communicated with a thermal condensation tower circulating pump 7, the thermal condensation tower circulating pump 7 is communicated with the water inlet of the thermal condensation tower 1 to form a loop, and the thermal condensation tower circulating tank 4 is communicated with a yellow phosphorus refining system through a yellow phosphorus liquid siphon pipe;
The water outlet at the bottom of the secondary condensation tower 2 is communicated with the inlet of the secondary condensation tower circulating tank 5, the water outlet of the secondary condensation tower circulating tank 5 is communicated with the secondary condensation tower circulating pump 8, and the secondary condensation tower circulating pump 8 is communicated with the water inlet of the secondary condensation tower 2 to form a loop; the pipeline of the secondary condensing tower circulating pump 8 communicated with the water inlet of the secondary condensing tower 2 is also provided with a pipeline communicated with the thermal condensing tower circulating tank 4; the circulating tank 5 of the secondary condensing tower is communicated with a yellow phosphorus refining system through a yellow phosphorus liquid siphon pipe;
The gas outlet at the top of the secondary condensation tower 2 is communicated with the gas inlet of the dynamic wave absorber 3, the liquid outlet of the dynamic wave absorber 3 is communicated with the dynamic wave absorber circulating pump 9, the dynamic wave absorber circulating pump 9 is communicated with the inlet of the cyclone 6, the outlet at the upper part of the cyclone 6 is communicated with the liquid inlet of the dynamic wave absorber 3, and the direction is opposite to the gas inlet direction, so that a loop is formed; the outlet at the bottom of the cyclone 6 is communicated with a circulating tank 5 of the secondary condensing tower; the gas outlet at the top of the dynamic wave absorber 3 is communicated with a phosphorus furnace tail gas utilization section, and the bottom of the dynamic wave absorber 3 is provided with a phosphorus-containing suspension outlet which is communicated with a yellow phosphorus refining system; the dynamic wave absorber 3 is also communicated with an external water supplementing device.
The thermal condensation tower 1 and the secondary condensation tower 2 are hollow absorption towers with 2-4 layers of spray heads arranged inside.
The temperature of the spray water of the thermal condensation tower 1 is 60-75 ℃, the temperature of the spray water of the secondary condensation tower 2 is 45-55 ℃, and the temperature of the absorption water of the dynamic wave absorber 3 is 18-22 ℃.
The working process comprises the following steps: the phosphorus furnace gas prepared by the yellow phosphorus electric furnace enters a thermal condensation tower 1, a thermal condensation tower circulating pump 7 extracts water (60-75 ℃) from a thermal condensation tower circulating tank 4 to spray in the thermal condensation tower 1, the phosphorus furnace gas reduces the temperature of the phosphorus furnace gas and increases the temperature of spray water through heat exchange with spray water, after part of yellow phosphorus in the phosphorus furnace gas is condensed, the phosphorus furnace gas is discharged into the thermal condensation tower circulating tank 4 along with spray water from a water outlet at the bottom of the thermal condensation tower 1, and then is discharged to a yellow phosphorus refining system from the thermal condensation tower circulating tank 4 through a yellow phosphorus liquid siphon pipe; the cooled phosphorus furnace gas enters a secondary condensation tower 2 from a gas outlet of the thermal condensation tower 1, a secondary condensation tower circulating pump 8 extracts water (45-55 ℃) from a secondary condensation tower circulating tank 5 to the secondary condensation tower 2 for spraying (a part of water pumped by the secondary condensation tower circulating pump 8 flows into the thermal condensation tower circulating tank 4 through a pipeline to supplement circulating water of the thermal condensation tower), the phosphorus furnace gas exchanges heat with spray water through convection to further reduce the temperature of the phosphorus furnace gas, after the further part of yellow phosphorus in the phosphorus furnace gas is condensed, the phosphorus furnace gas is discharged to the secondary condensation tower circulating tank 5 along with the spray water from a water outlet at the bottom of the secondary condensation tower 2, and then is discharged to a yellow phosphorus refining system from the secondary condensation tower circulating tank 5 through a yellow phosphorus liquid siphon; after the secondary cooling phosphorus furnace gas enters a dynamic wave absorber 3 from a gas outlet of a secondary condensing tower 2, a dynamic wave absorber circulating pump 9 pumps water (18-22 ℃) to separate solid yellow phosphorus through a cyclone 6, liquid is sprayed out against the gas flow through a nozzle with a large aperture and non-throttling type from an outlet at the upper part of the cyclone 6, the gas flow collides with the liquid, thereby forming a foam layer with high-efficiency heat and mass transfer, the rapid exchange of gas-liquid heat is realized in extremely short time, namely the discharge temperature of the phosphorus furnace tail gas is reduced from more than 50 ℃ to less than 22 ℃, as can be seen from fig. 1, the phosphorus content in the phosphorus furnace tail gas is up to 3g/Nm 3 at 50 ℃, and the phosphorus content in the outlet gas at 22 ℃ is only 0.18g/Nm 3; the solid yellow phosphorus separated by the cyclone 6 is discharged from the outlet at the bottom of the cyclone 6 to the circulating tank 5 of the secondary condensing tower, and the solid yellow phosphorus is melted into liquid yellow phosphorus due to the temperature of the circulating tank 5 of the secondary condensing tower being 45-55 ℃, and then discharged to the yellow phosphorus refining system from the circulating tank 5 of the secondary condensing tower through a yellow phosphorus liquid siphon pipe. The phosphorus furnace tail gas from the dynamic wave absorber 3 is sent to a phosphorus furnace tail gas utilization section from a gas outlet at the top of the dynamic wave absorber 3, and the partially condensed liquid (or solid) phosphorus is sent to a yellow phosphorus refining system from a phosphorus-containing suspension outlet at the bottom of the dynamic wave absorber 3; the dynamic wave absorber 3 is also communicated with an external water supplementing device so as to ensure the volume of absorbed water.
Compared with the prior art, the invention has the following advantages or positive effects:
(1) The absorption rate of yellow phosphorus is improved, the emission of harmful substances in the tail gas of a phosphorus furnace is reduced, and the environment is protected
The most outstanding innovation point of the invention in the yellow phosphorus production field is to use a dynamic wave absorber; the principle of full mixing of dynamic wave gas and liquid phase is applied, so that the temperature of the absorption liquid is equivalent to that of the phosphorus furnace gas, thereby reducing the amount of yellow phosphorus carried by the phosphorus furnace gas (the yellow phosphorus content in the tail gas of the phosphorus furnace is reduced from 3g/Nm 3 to below 0.18g/Nm 3); the environment is protected, and the production cost is reduced; in the yellow phosphorus production process, the method has obvious characteristics of energy conservation, consumption reduction and synergy;
(2) The invention provides a combination of a dynamic wave absorber and a cyclone, which solves the problems that the temperature of a liquid phase is reduced, yellow phosphorus is converted into a solid phase (yellow phosphorus solidification temperature is 44.1 ℃) and the normal operation of equipment is affected. The cyclone is adopted at the circulating pump outlet of the dynamic wave absorber, and the separation of solid yellow phosphorus is realized through the difference of centrifugal force of solid particles and liquid phase, so that the temperature of the tail gas outlet of the phosphorus furnace is ensured to be lower than 22 ℃, and the unstable operation of equipment caused by yellow phosphorus solidification is avoided;
(3) The invention combines dynamic wave absorber with low temperature water absorption to reduce the smoke exhaust temperature. The dynamic wave absorber has the effect of absorbing (yellow phosphorus is almost insoluble in water) but adopts the principle of fully contacting dynamic wave gas and liquid to enable the gas exhaust temperature to be close to the liquid phase, and the reduction of the gas temperature causes the condensation of the original saturated gaseous phosphorus vapor due to the close correlation of the content of the yellow phosphorus in the gas and the temperature, so that the phosphorus content in the smoke emission is reduced;
(4) Greatly reduces the equipment volume of the absorption section and reduces the occupied area of the device. The dynamic wave gas speed is up to 15-25m/s, which is more than 10 times of that of the spray tower, and the gas speed is increased, so that the volume of the equipment in the absorption section is reduced, and the material and the occupied area of the device are saved;
(5) Compared with the traditional process flow, the absorption rate of yellow phosphorus in the last stage absorption tower (dynamic wave absorber) is improved to more than 98%, the circulating washing water consumption of the production system is reduced by 60-80%, obvious economic benefits are achieved, and meanwhile, the method has good social benefits due to the reduction of environmental pollution, and is an energy-saving yellow phosphorus tail gas absorption technology.
Drawings
FIG. 1 is a graph of temperature versus phosphorus vapor content in furnace gas;
FIG. 2 is a schematic diagram of the structure of the device of the present invention;
In the figure: the device comprises a 1-thermal condensing tower, a 2-secondary condensing tower, a 3-dynamic wave absorber, a 4-thermal condensing tower circulating tank, a 5-secondary condensing tower circulating tank, a 6-cyclone, a 7-thermal condensing tower circulating pump, an 8-secondary condensing tower circulating pump and a 9-dynamic wave absorber circulating pump.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Taking a yellow phosphorus production device with annual yield of 10kt/a as an example, the annual operation hours are 7200 hours, and the specific implementation contents are as follows:
Example 1
An absorption device for improving yellow phosphorus yield comprises a thermal condensation tower 1, a secondary condensation tower 2, a dynamic wave absorber 3, a thermal condensation tower circulation tank 4, a secondary condensation tower circulation tank 5, a cyclone 6, a thermal condensation tower circulation pump 7, a secondary condensation tower circulation pump 8 and a dynamic wave absorber circulation pump 9;
The gas inlet at the top of the thermal condensation tower 1 is communicated with the yellow phosphorus electric furnace tail gas outlet, and the gas outlet at the lower part of the thermal condensation tower 1 is communicated with the gas inlet at the lower part of the secondary condensation tower 2; the water outlet at the bottom of the thermal condensation tower 1 is communicated with the inlet of a thermal condensation tower circulating tank 4, the water outlet of the thermal condensation tower circulating tank 4 is communicated with a thermal condensation tower circulating pump 7, the thermal condensation tower circulating pump 7 is communicated with the water inlet of the thermal condensation tower 1 to form a loop, and the thermal condensation tower circulating tank 4 is communicated with a yellow phosphorus refining system through a yellow phosphorus liquid siphon pipe;
The water outlet at the bottom of the secondary condensation tower 2 is communicated with the inlet of the secondary condensation tower circulating tank 5, the water outlet of the secondary condensation tower circulating tank 5 is communicated with the secondary condensation tower circulating pump 8, and the secondary condensation tower circulating pump 8 is communicated with the water inlet of the secondary condensation tower 2 to form a loop; the pipeline of the secondary condensing tower circulating pump 8 communicated with the water inlet of the secondary condensing tower 2 is also provided with a pipeline communicated with the thermal condensing tower circulating tank 4; the circulating tank 5 of the secondary condensing tower is communicated with a yellow phosphorus refining system through a yellow phosphorus liquid siphon pipe;
The gas outlet at the top of the secondary condensation tower 2 is communicated with the gas inlet of the dynamic wave absorber 3, the liquid outlet of the dynamic wave absorber 3 is communicated with the dynamic wave absorber circulating pump 9, the dynamic wave absorber circulating pump 9 is communicated with the inlet of the cyclone 6, the outlet at the upper part of the cyclone 6 is communicated with the liquid inlet of the dynamic wave absorber 3, and the direction is opposite to the gas inlet direction, so that a loop is formed; the outlet at the bottom of the cyclone 6 is communicated with a circulating tank 5 of the secondary condensing tower; the gas outlet at the top of the dynamic wave absorber 3 is communicated with a phosphorus furnace tail gas utilization section, and the bottom of the dynamic wave absorber 3 is provided with a phosphorus-containing suspension outlet which is communicated with a yellow phosphorus refining system; the dynamic wave absorber 3 is also communicated with an external water supplementing device;
The thermal condensation tower 1 and the secondary condensation tower 2 are hollow absorption towers with 2 layers of spray heads.
The outlet temperature of the yellow phosphorus electric furnace is 180 ℃, phosphorus furnace gas with the phosphorus content of about 350g/Nm 3 enters a thermal condensing tower 1, the circulating spray water temperature of the thermal condensing tower 1 is controlled to be 75 ℃, the gas temperature of the outlet thermal condensing tower is 100 ℃, and the phosphorus yield is 70%; the spray water temperature of the secondary condensation tower is 55 ℃, the gas temperature of the secondary condensation tower is 75 ℃, and the phosphorus yield is 72%; the absorption water temperature of the dynamic wave absorber is 22 ℃, the outlet gas temperature is 22 ℃, the outlet phosphorus content is 0.18g/Nm 3, and the phosphorus yield is 99.4%. The total phosphorus yield was 99.95%.
Example 2
The device structure of this embodiment refers to embodiment 1, and is different in that the thermal condensation tower 1 and the secondary condensation tower 2 in this embodiment are hollow absorption towers with 3 layers of spray heads.
The outlet temperature of the yellow phosphorus electric furnace is 150 ℃, phosphorus furnace gas with the phosphorus content of about 350g/Nm 3 enters a thermal condensing tower, the circulating spray water temperature of the thermal condensing tower is controlled to be 70 ℃, the gas temperature of the thermal condensing tower is controlled to be 95 ℃, and the phosphorus yield is 76%; the spray water temperature of the secondary condensation tower is 55 ℃, the gas temperature of the secondary condensation tower is 70 ℃, and the phosphorus yield is 76.5%; the absorption water temperature of the dynamic wave absorber is 20 ℃, the outlet gas temperature is 20 ℃, the outlet phosphorus content is 0.14g/Nm 3, and the phosphorus yield is 99.3%. The total phosphorus yield was 99.96%.
Example 3
The device structure of this embodiment refers to embodiment 1, and is different in that the thermal condensation tower 1 and the secondary condensation tower 2 in this embodiment are hollow absorption towers with built-in 4 layers of spray heads.
The outlet temperature of the yellow phosphorus electric furnace is 150 ℃, phosphorus furnace gas with the phosphorus content of about 350g/Nm 3 enters a thermal condensing tower, the circulating spray water temperature of the thermal condensing tower is controlled to be 65 ℃, the gas temperature of the thermal condensing tower is 85 ℃, and the phosphorus yield is 84.3%; the spray water temperature of the secondary condensation tower is 45 ℃, the gas temperature of the secondary condensation tower is 65 ℃, and the phosphorus yield is 78.25%; the absorption water temperature of the dynamic wave absorber is 20 ℃, the outlet gas temperature is 20 ℃, the outlet phosphorus content is 0.14 g/Nm 3, and the phosphorus yield is 98.8%. The total phosphorus yield was 99.96%.
Example 4
The device structure of this embodiment is different from that of embodiment 3 in that the water temperatures of the thermal condensation tower 1, the secondary condensation tower 2, and the dynamic wave absorber 3 in this embodiment are set as follows:
The temperature of the phosphorus furnace gas at the outlet of the yellow phosphorus electric furnace is 130 ℃, the phosphorus furnace gas with the phosphorus content of about 350g/Nm 3 enters a thermal condensing tower, the circulating spray water temperature of the thermal condensing tower is controlled to be 60 ℃, the gas temperature of the outlet thermal condensing tower is 80 ℃, and the phosphorus yield is 89.4%; the spray water temperature of the secondary condensation tower is 45 ℃, the gas temperature of the secondary condensation tower is 60 ℃, and the phosphorus yield is 83.8%; the dynamic wave absorber had an absorption water temperature of 18℃and an outlet gas temperature of 18℃and an outlet phosphorus content of 0.1g/Nm 3 and a phosphorus yield of 98.33%. The total phosphorus yield was 99.97%.
Claims (1)
1. An absorption device for improving yellow phosphorus yield comprises a thermal condensation tower (1), a secondary condensation tower (2), a dynamic wave absorber (3), a thermal condensation tower circulation tank (4), a secondary condensation tower circulation tank (5), a cyclone (6), a thermal condensation tower circulation pump (7), a secondary condensation tower circulation pump (8) and a dynamic wave absorber circulation pump (9);
The gas inlet at the top of the thermal condensation tower (1) is communicated with the yellow phosphorus electric furnace tail gas outlet, and the gas outlet at the lower part of the thermal condensation tower (1) is communicated with the gas inlet at the lower part of the secondary condensation tower (2); the water outlet at the bottom of the thermal condensation tower (1) is communicated with the inlet of a thermal condensation tower circulating tank (4), the water outlet of the thermal condensation tower circulating tank (4) is communicated with a thermal condensation tower circulating pump (7), the thermal condensation tower circulating pump (7) is communicated with the water inlet of the thermal condensation tower (1) to form a loop, and the thermal condensation tower circulating tank (4) is communicated with a yellow phosphorus refining system through a yellow phosphorus liquid siphon pipe;
The water outlet at the bottom of the secondary condensing tower (2) is communicated with the inlet of the secondary condensing tower circulating tank (5), the water outlet of the secondary condensing tower circulating tank (5) is communicated with the secondary condensing tower circulating pump (8), and the secondary condensing tower circulating pump (8) is communicated with the water inlet of the secondary condensing tower (2) to form a loop; a pipeline which is communicated with the water inlet of the secondary condensing tower (2) is also provided with a pipeline which is communicated with the circulating groove (4) of the thermal condensing tower; the second-stage condensing tower circulating tank (5) is communicated with a yellow phosphorus refining system through a yellow phosphorus liquid siphon pipe;
The gas outlet at the top of the secondary condensation tower (2) is communicated with the gas inlet of the dynamic wave absorber (3), the liquid outlet of the dynamic wave absorber (3) is communicated with the dynamic wave absorber circulating pump (9), the dynamic wave absorber circulating pump (9) is communicated with the inlet of the cyclone (6), the outlet at the upper part of the cyclone (6) is communicated with the liquid inlet of the dynamic wave absorber (3), and the direction is opposite to the gas inlet direction, so that a loop is formed; the outlet at the bottom of the cyclone (6) is communicated with a circulating groove (5) of the secondary condensing tower; the gas outlet at the top of the dynamic wave absorber (3) is communicated with a phosphorus furnace tail gas utilization section, and the bottom of the dynamic wave absorber (3) is provided with a phosphorus-containing suspension outlet which is communicated with a yellow phosphorus refining system; the dynamic wave absorber (3) is also communicated with an external water supplementing device;
The temperature of spray water of the thermal condensation tower (1) is 60-75 ℃, the temperature of spray water of the secondary condensation tower (2) is 45-55 ℃, and the temperature of absorption water of the dynamic wave absorber (3) is 18-22 ℃;
The thermal condensation tower (1) and the secondary condensation tower (2) are hollow absorption towers with 2-4 layers of spray heads arranged inside.
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| CN201810058055.6A CN108163824B (en) | 2018-01-22 | 2018-01-22 | Absorption device for improving yellow phosphorus yield |
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| CN201810058055.6A CN108163824B (en) | 2018-01-22 | 2018-01-22 | Absorption device for improving yellow phosphorus yield |
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| CN207957772U (en) * | 2018-01-22 | 2018-10-12 | 昆明理工大学 | A kind of absorption plant improving yellow phosphorus yield |
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2018
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| CN101708412A (en) * | 2009-11-16 | 2010-05-19 | 浙江大学 | Twin tower type recovering sulfur resource ammonia desulfuration equipment and method |
| CN204211490U (en) * | 2014-11-06 | 2015-03-18 | 禄丰县中胜磷化有限公司 | A kind of Of Yellow Phosphorus Plants |
| CN207957772U (en) * | 2018-01-22 | 2018-10-12 | 昆明理工大学 | A kind of absorption plant improving yellow phosphorus yield |
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