CN107051176A - The ardealite solid waste processing reutilization system and processing method of environmental protection - Google Patents
The ardealite solid waste processing reutilization system and processing method of environmental protection Download PDFInfo
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- CN107051176A CN107051176A CN201710409270.1A CN201710409270A CN107051176A CN 107051176 A CN107051176 A CN 107051176A CN 201710409270 A CN201710409270 A CN 201710409270A CN 107051176 A CN107051176 A CN 107051176A
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- gas
- liquid
- ardealite
- flow reactor
- circulation flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
Abstract
The present invention discloses the ardealite solid waste processing reutilization system and processing method of a kind of environmental protection, including the pulp mixing channel being sequentially connected by liquid phase pipeline, circulation reaction component, gas-liquid separator and slurries filtration machine, circulation reaction component is connected with aerating pipeline and ammonification pipeline, gas-liquid separator is connected with circulation of tail gas reuse means, using the beneficial effects of the invention are as follows dead meal of the ardealite from production phosphoric acid, CO2The waste gas produced from synthesis ammonia, utilizes CO2The sulfate radical in ardealite is replaced, ammonium sulfate fertilizer is obtained, is utilized the Sulphur ressource in ardealite, while consuming substantial amounts of CO2Waste gas, reduces the CO of synthetic ammonia installation2The discharge capacity of waste gas, the present invention in the case where plant investment, operating cost are low, can realize the recycling of Sulphur ressource in ardealite solid waste.
Description
Technical field
The present invention relates to belong to chemical production equipment field, and in particular to a kind of ardealite solid waste of environmental protection
Handle reutilization system and processing method.
Background technology
Produced solid waste when ardealite is mainly sulphur dioxide of phosphor chemical industry production phosphoric acid by wet process, produce 1 ton of phosphoric acid (with
100%P2O5Meter) produce 4.8~5.0 tons of ardealites (butt).The ardealite volume of cargo in storage of current China is with 5,000 ten thousand tons/year of speed
Degree increases, and total volume of cargo in storage alreadys exceed 300,000,000 tons.Ardealite is moist fine powder, and 95% particle is less than 0.2mm, Free water
Content 20%~30%, and a small amount of objectionable impurities such as phosphorous, fluorine, organic matter and silica, in acidity, pH value is typically 4.5
Hereinafter, any discharge can cause environmental pollution, if setting fixed stockyard, not only occupation of land is big, and investment is high, and to the requirement in place
Height, prolonged accumulation, due to wind erosion and weathering, can cause the pollution of surface water or underground water.Ardealite main chemical compositions
It is calcium sulphate dihydrate, major impurity is phosphorus, fluorine, organic matter, has the impurity such as alkali metal salt, silicon, iron, aluminium, magnesium, and it contains a variety of latent
The resources such as sulphur, calcium in purposes, but wherein phosphorus, the presence of fluorine seriously limit its comprehensive utilization.At present, the whole world is to phosphorus stone
The average utilization of cream only reaches 4.5%, in Chinese utilization rate less than 30%.
The content of the invention
To solve above technical problem, it is an object of the invention to provide a kind of ardealite solid waste of environmental protection
Handle reutilization system and processing method.
Technical scheme is as follows：
What an object of the present invention was realized in：
A kind of ardealite solid waste processing reutilization system of environmental protection, its key is：Including passing through liquid phase
Pulp mixing channel, circulation reaction component, gas-liquid separator and slurries filtration machine that pipeline is sequentially connected, the circulation reaction component
Aerating pipeline and ammonification pipeline are connected with, the gas-liquid separator is connected with circulation of tail gas reuse means.Using above-mentioned technology
Ardealite is added and ardealite slurry is formed after water of sizing mixing by scheme, and liquefied ammonia is added after ardealite slurry is sent into circulation reaction component
And it is passed through CO2Gas, after fully being reacted with ardealite slurry, then through gas-liquid separation obtains ammonium sulfate liquid and calcium carbonate solid,
After ammonium sulfate liquid concentration obtained ammonium sulfate can as fertilizer, and solid carbonic acid calcium can as cement raw materials for production,
The primary raw material of production is discarded ardealite, and carbon dioxide may be derived from synthesizing the CO that ammonia is produced2Waste gas, two kinds of wastes are all obtained
Make full use of, green, economic, environmental protection.
Further, above-mentioned circulation reaction component includes the circulation flow reactor of two series connection, the liquid of the pulp mixing channel
Outlet is connected with the liquid inlet of first circulation flow reactor, and the gas access of first circulation flow reactor is connected with
The aerating pipeline, first circulation flow reactor is connected with the ammonification pipeline, the liquid of first circulation flow reactor
Body outlet is connected with the liquid inlet of second circulation flow reactor, the gas vent of first circulation flow reactor and the
The gas access connection of two circulation flow reactors, the liquid outlet of second circulation flow reactor and the gas-liquid separation
The liquid inlet connection of device.High pressure CO is passed through to first circulation flow reactor using the program2Gas, this high pressure CO2Gas with
The effect that circulation reaches automatic stirring is formed between ardealite slurry in circulation flow reactor, without additionally mounted agitating device,
And the automatic stirring effect of gas is evenly reacted more fully, and remaining CO in first circulation flow reactor2With mixing for ammonia
Closing gas still has certain pressure, then it is sent into second circulation flow reactor, is reacted by two step circulation, effectively lifting
Ardealite slurry and CO2, reactivity between ammonia, the yield of ammonium sulfate is improved, using this two-step reaction ammonium sulfate
Yield be up to 97%.
Above-mentioned circulation of tail gas reuse means includes scrubbing tower, the gas vent of second circulation flow reactor and institute
State gas access of the gas vent of gas-liquid separator respectively with the scrubbing tower to be connected, the liquid outlet connection of the scrubbing tower
There is circulating tank, the liquid outlet of the circulating tank is connected with the spray liquid entrance of the scrubbing tower.Scrubbing tower is passed through using the program
Tail gas is washed again, it is to avoid the ammonia carried secretly in tail gas directly discharge causes atmosphere pollution.
The liquid outlet of above-mentioned circulating tank is connected with the liquid inlet of the pulp mixing channel.Made using this scheme cleaning solution
To be mixed in advance with ardealite in water feeding pulp mixing channel of sizing mixing, the ammonia in cleaning solution obtains secondary utilization.
The top of above-mentioned circulating tank is connected with the top of the scrubbing tower through air pressure balance pipeline.Ensure to follow using this scheme
Cleaning solution circulation in air pressure balance in ring tank and scrubbing tower, scrubbing tower is unimpeded.
The bottom of towe of above-mentioned scrubbing tower is connected with cooling water inlet pipe road, and the tower top of the scrubbing tower is connected with cooling water water outlet
Pipeline, the tower top of the scrubbing tower is also associated with discharge duct and shower water addition pipeline.Shower water can be passed through using the program
Add pipeline and add new shower water, ensure that the cleaning solution liquid level in circulating tank keeps stable all the time.
What the second object of the present invention was realized in：
A kind of ardealite solid waste processing reuse method of environmental protection including above-mentioned processing system, it is crucial
It is to carry out according to the following steps：
The first step, adds in the pulp mixing channel and adds water of sizing mixing after ardealite and be configured to ardealite slurries；
The ardealite slurries are pumped into first circulation flow reactor by second step, while passing through the ammonification pipeline
Liquefied ammonia or gas ammonia are added to first circulation flow reactor, is led to by the aerating pipeline to first circulation flow reactor
Enter high pressure CO2The first gas-liquid mixture is obtained after gas, first set reaction, first gas-liquid mixture is sent into second ring
In flow reactor, while by the remaining CO in first circulation flow reactor2Second institute is accessed with the mixed gas of ammonia
State progress secondary response in circulation flow reactor and obtain the second gas-liquid mixture；
3rd step, second gas-liquid mixture is introduced into the gas-liquid separator, and the liquid feeding after separation is described
Slurries filtration machine is filtrated to get ammonium sulfate and calcium carbonate solid, and the gas after separation sends into hydro-peening in the scrubbing tower, so
Hydro-peening liquid is sent into the circulating tank afterwards；
4th step, progress circulation spray in the scrubbing tower is fed again into a part of hydro-peening liquid in the circulating tank
Wash, hydro-peening liquid described in another part, which is discharged into the pulp mixing channel, turns into the water of sizing mixing.
CO is passed through using above-mentioned technical proposal2The CO that gas is produced essentially from synthesis ammonia2Waste gas, another raw material phosphor stone
Two kinds of discarded objects are so become Fei Weibao simultaneously, had both avoided the direct discharge of discarded object by dead meal of the cream from production phosphoric acid
The environmental protection that brings, potential safety hazard, while product has larger economic value again；And the tail gas with ammonia produced in preparation process
It is washed down by ammonia after spray washing into cleaning solution, other gases meet environmental requirement and are discharged, and what is obtained washes
The recyclable washing of liquid is washed, also can not produced in so whole production process any useless as sizing mixing in water feeding pulp mixing channel
Gurry, all elements are all effectively utilized, environment friendliness.
As preferred：Calcium carbonate solid obtained by cyclic washing, collects washings, and the washings are sent into the circulation
In tank.Reclaimed using the ammonium sulfate carried secretly in program solid carbonic acid calcium is washed, obtained pure calcium carbonate is higher, while
The yield of ammonium sulfate is added, and washings can also carry out twice laid again.
The tower top of above-mentioned scrubbing tower is connected with shower water addition pipeline, and the shower water that pipeline is newly added is added through the shower water
And the total amount of the washings entered in the circulating tank is equal to the total amount for the hydro-peening liquid discharged from the circulating tank.Adopt
Ensure that cleaning solution that circulating tank is maintains balance all the time with this scheme, it is ensured that whole reaction process is smoothed out.
The bottom of towe of above-mentioned scrubbing tower is connected with cooling water inlet pipe road, and the tower top of the scrubbing tower is connected with cooling water water outlet
Pipeline；The top of the circulating tank is connected with the top of the scrubbing tower through air pressure balance pipeline.Circulation is ensured using this scheme
Cleaning solution circulation in air pressure balance in tank and scrubbing tower, scrubbing tower is unimpeded.
Beneficial effect：Using the beneficial effects of the invention are as follows dead meal of the ardealite from production phosphoric acid, CO2From synthesis
The waste gas that ammonia is produced, utilizes CO2The sulfate radical in ardealite is replaced, ammonium sulfate fertilizer is obtained, obtains the Sulphur ressource in ardealite
To utilization, while consuming substantial amounts of CO2Waste gas, reduces the CO of synthetic ammonia installation2The discharge capacity of waste gas, the present invention can be in dress
Put investment, operating cost it is low in the case of, realize the recycling of Sulphur ressource in ardealite solid waste.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Embodiment
With reference to embodiment and accompanying drawing, the invention will be further described.
Embodiment 1, as shown in figure 1, a kind of ardealite solid waste processing reutilization system of environmental protection, including it is logical
Cross pulp mixing channel 1, circulation reaction component, gas-liquid separator 4 and slurries filtration machine 5 that liquid phase pipeline is sequentially connected, the ring
Stream reaction component is connected with aerating pipeline 3 and ammonification pipeline 8, and the gas-liquid separator 4 is connected with circulation of tail gas reuse means.
The circulation reaction component include two series connection circulation flow reactors 2, the liquid outlet of the pulp mixing channel 1 with
Agitator is provided with the liquid inlet connection of first circulation flow reactor 2, the slurrying tank 1, first circulation is anti-
The gas access of device 2 is answered to be connected with the aerating pipeline 3, first circulation flow reactor 2 is connected with the ammonification pipeline 8,
The liquid outlet of first circulation flow reactor 2 is connected with the liquid inlet of second circulation flow reactor 2, first institute
The gas vent for stating circulation flow reactor 2 is connected with the gas access of second circulation flow reactor 2, and second circulation is anti-
The liquid outlet of device 2 is answered to be connected with the liquid inlet of the gas-liquid separator 4, the slurries filtration machine 5 is band filter.
The circulation of tail gas reuse means includes scrubbing tower 6, the gas vent of second circulation flow reactor 2 and
Gas access of the gas vent of the gas-liquid separator 4 respectively with the scrubbing tower 6 is connected, the liquid discharge of the scrubbing tower 6
Mouth is connected with circulating tank 7, and the circulating tank 7 is provided with two liquid outlets, the spray of one of liquid outlet and the scrubbing tower 6
The connection of liquid entrance is drenched, another liquid outlet of the circulating tank 7 is connected with the liquid inlet of the pulp mixing channel 1, described
The top of circulating tank 7 is connected with the top of the scrubbing tower 6 through air pressure balance pipeline 9, and heat exchange is distributed with inside the scrubbing tower 6
Tubulation, bottom of towe are connected with cooling water inlet pipe road 10, and the tower top of the scrubbing tower 6 is connected with cooling water outlet pipe road 11, described
The tower top of scrubbing tower 6 is also associated with discharge duct 12 and shower water addition pipeline 13.
A kind of embodiment 2, the ardealite solid waste processing of environmental protection of the system based on described in embodiment 1 is sharp again
With method, carry out according to the following steps：
The first step, adds in the pulp mixing channel 1 and adds water of sizing mixing after ardealite and be configured to ardealite slurries；
The ardealite slurries are pumped into first circulation flow reactor 2 by second step, while passing through the ammonification pipeline
8 add liquefied ammonia or gas ammonia to first circulation flow reactor 2, are reacted by the aerating pipeline 3 to first circulation
Device 2 is passed through high pressure CO2The first gas-liquid mixture is obtained after gas, first set reaction, first gas-liquid mixture is sent into second
In the circulation flow reactor 2, while by the remaining CO in first circulation flow reactor 22Accessed with the mixed gas of ammonia
Secondary response is carried out in second circulation flow reactor 2 and obtains the second gas-liquid mixture, in two circulation flow reactors 2
CO2, liquefied ammonia and ardealite slurries reaction time generally control at 5 minutes or so；
3rd step, second gas-liquid mixture is introduced into the gas-liquid separator 4, the liquid after vacuum flashing separation
Send into the slurries filtration machine 5 and be filtrated to get ammonium sulfate and calcium carbonate solid, the gas after separation sends into the scrubbing tower 6
Interior hydro-peening, then sends hydro-peening liquid into the circulating tank 7, wherein obtaining product ammonium sulfate after ammonium sulfate concentration, instead
After backwashing washs calcium carbonate solid and collects washings, and the washings are sent into the circulating tank 7；
4th step, is fed again into the scrubbing tower 6 into a part of hydro-peening liquid in the circulating tank 7 and is circulated
Hydro-peening, hydro-peening liquid described in another part, which is discharged into the pulp mixing channel 1, turns into the water of sizing mixing.
Heat exchanging pipe, bottom of towe are distributed with inside the scrubbing tower 6 and is connected with cooling water inlet pipe road 10, the scrubbing tower 6
Tower top be connected with cooling water outlet pipe road 11, the tower top of the scrubbing tower 6 is also associated with shower water addition pipeline 13, through the spray
The shower water and the total amount of the washings entered in the circulating tank 7 that water drenching addition pipeline 13 is newly added are equal to from described
The top of the total amount for the hydro-peening liquid discharged in circulating tank 7, the top of the circulating tank 7 and the scrubbing tower 6 is through barometric pipe
Road 9 is connected.
Finally it should be noted that foregoing description is only the preferred embodiments of the present invention, the ordinary skill people of this area
Member on the premise of without prejudice to present inventive concept and claim, can make table as multiple types under the enlightenment of the present invention
Show, such conversion is each fallen within protection scope of the present invention.
Claims (10)
1. a kind of ardealite solid waste processing reutilization system of environmental protection, it is characterised in that：Including passing through liquid-phase tube
Pulp mixing channel (1), circulation reaction component, gas-liquid separator (4) and slurries filtration machine (5) that road is sequentially connected, the circulation
Reaction component is connected with aerating pipeline (3) and ammonification pipeline (8), and the gas-liquid separator (4) is connected with circulation of tail gas recycling
Device.
2. the ardealite solid waste processing reutilization system of environmental protection according to claim 1, it is characterised in that：
The circulation reaction component includes the circulation flow reactor (2) of two series connection, the liquid outlet and first of the pulp mixing channel (1)
The liquid inlet connection of the individual circulation flow reactor (2), the gas access of first circulation flow reactor (2) is connected with described
Aerating pipeline (3), first circulation flow reactor (2) is connected with the ammonification pipeline (8), first circulation flow reactor
(2) liquid outlet is connected with the liquid inlet of second circulation flow reactor (2), first circulation flow reactor (2)
Gas vent be connected with the gas access of second circulation flow reactor (2), the liquid of second circulation flow reactor (2)
Body outlet is connected with the liquid inlet of the gas-liquid separator (4).
3. the ardealite solid waste processing reutilization system of environmental protection according to claim 2, it is characterised in that：
The circulation of tail gas reuse means includes scrubbing tower (6), the gas vent of second circulation flow reactor (2) and described
Gas access of the gas vent of gas-liquid separator (4) respectively with the scrubbing tower (6) is connected, the liquid of the scrubbing tower (6)
Outlet is connected with circulating tank (7), and the liquid outlet of the circulating tank (7) is connected with the spray liquid entrance of the scrubbing tower (6).
4. the ardealite solid waste processing reutilization system of environmental protection according to claim 3, it is characterised in that：
The liquid outlet of the circulating tank (7) is connected with the liquid inlet of the pulp mixing channel (1).
5. the ardealite solid waste processing reutilization system of the environmental protection according to claim 3 or 4, its feature exists
In：The top of the circulating tank (7) is connected with the top of the scrubbing tower (6) through air pressure balance pipeline (9).
6. the ardealite solid waste processing reutilization system of environmental protection according to claim 5, it is characterised in that：
The bottom of towe of the scrubbing tower (6) is connected with cooling water inlet pipe road (10), and the tower top of the scrubbing tower (6) is connected with cooling water and gone out
Waterpipe (11), the tower top of the scrubbing tower (6) is also associated with discharge duct (12) and shower water addition pipeline (13).
7. a kind of ardealite solid waste processing recycling side of environmental protection based on described in claim any one of 1-4
Method, it is characterised in that carry out according to the following steps：
The first step, adds in the pulp mixing channel (1) and adds water of sizing mixing after ardealite and be configured to ardealite slurries；
The ardealite slurries are pumped into first circulation flow reactor (2), while passing through the ammonification pipeline by second step
(8) liquefied ammonia or gas ammonia are added to first circulation flow reactor (2), first ring is given by the aerating pipeline (3)
Flow reactor (2) is passed through high pressure CO2The first gas-liquid mixture is obtained after gas, first set reaction, first gas-liquid mixture is sent
Enter in second circulation flow reactor (2), while by the remaining CO in first circulation flow reactor (2)2With ammonia
Mixed gas accesses progress secondary response in second circulation flow reactor (2) and obtains the second gas-liquid mixture；
3rd step, second gas-liquid mixture is introduced into the gas-liquid separator (4), and the liquid after separation sends into the slurry
Material filter (5) is filtrated to get ammonium sulfate and calcium carbonate solid, and the gas after separation, which is sent into the scrubbing tower (6), to be sprayed
Wash, hydro-peening liquid is then sent into the circulating tank (7)；
4th step, is fed again into the scrubbing tower (6) into a part of hydro-peening liquid in the circulating tank (7) and is circulated
Hydro-peening, hydro-peening liquid described in another part, which is discharged into the pulp mixing channel (1), turns into the water of sizing mixing.
8. the ardealite solid waste processing reuse method of environmental protection according to claim 7, it is characterised in that：
Calcium carbonate solid obtained by cyclic washing, collects washings, and the washings are sent into the circulating tank (7).
9. the ardealite solid waste processing reuse method of environmental protection according to claim 8, it is characterised in that：
The tower top of the scrubbing tower (6) is connected with shower water addition pipeline (13), and the spray that pipeline (13) is newly added is added through the shower water
The total amount of water drenching and the washings entered in the circulating tank (7) is equal to the hydro-peening from the middle discharge of the circulating tank (7)
The total amount of liquid.
10. the ardealite solid waste processing reuse method of the environmental protection according to claim 7,8 or 9, it is special
Levy and be：The bottom of towe of the scrubbing tower (6) is connected with cooling water inlet pipe road (10), and the tower top of the scrubbing tower (6) is connected with
Cooling water outlet pipe road (11)；The top of the circulating tank (7) is with the top of the scrubbing tower (6) through air pressure balance pipeline (9)
Connection.
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| CN112591768A (en) * | 2020-09-01 | 2021-04-02 | 安徽海默科技股份有限公司 | Process for producing potassium sulfate and ammonium potassium chloride by using phosphogypsum |
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