CN204981685U - Device of mixed fertilizer is prepared to waste liquid that utilizes flue gas desulfurization denitration to produce - Google Patents
Device of mixed fertilizer is prepared to waste liquid that utilizes flue gas desulfurization denitration to produce Download PDFInfo
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- CN204981685U CN204981685U CN201520679856.6U CN201520679856U CN204981685U CN 204981685 U CN204981685 U CN 204981685U CN 201520679856 U CN201520679856 U CN 201520679856U CN 204981685 U CN204981685 U CN 204981685U
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Abstract
The utility model discloses a device of mixed fertilizer is prepared to waste liquid that utilizes flue gas desulfurization denitration to produce. The device is the mixed ground paste that the abraum salt liquid that utilizes the flue gas desulfurization denitration to produce evaporates the crystallization earlier in the crystallizer, the ground paste that obtains wet sulphur ammonium and ammonium nitrate again through sedimentation, centrifugal separator after -separating, carries and obtains the mixed fertilizer product unlap of sulphur ammonium nitrate to the vibrated fluidized bed drying after will mixing the ground paste most likely. The secondary pollution of the abraum salt liquid that the flue gas desulfurization denitration produced has been avoided to this technology, and changing waste into valuables has become the chemical fertilizer by the waste liquid, has increased economic benefits and environmental benefit.
Description
Technical field
The utility model belongs to technical field of fertilizers, is specifically related to the device that a kind of waste liquid utilizing flue gas desulfurization and denitrification to produce prepares sulphur ammonium nitrate mixed fertilizer.
Background technology
Along with the rapid growth of Chinese national economy, to the increase of energy demand, the SO that the processes such as fire coal, fuel oil and oil refining are formed
2quantity discharged increases day by day, acid rain and SO
2pollute and increase year by year, serious harm residents ' health, broken ring ecotope.
According to the measuring and calculating of Chinese Ministry of Environmental Protection, taking under strict pollution control measures, " 12 " period will increase SO newly
2, NO
xquantity discharged 2,600,000 tons and 3,600,000 tons, newly-increased chemical oxygen demand (COD) and ammonia nitrogen quantity discharged 4,300,000 tons and 540,000 tons, the task of pollution emission reduction is very arduous.Therefore Chinese Ministry of Environmental Protection has made stricter control to the discharge of each pollutent during " 12 ", requires that Air Pollutant Emission total amount continues to cut down, requires national SO
2total emission volumn reduced 10%, key industry major area NO than 2010
xtotal emission volumn reduced 10% than 2010.For SO
2discharge, on the basis controlling national total release, cut down from emphasis key industry total amount and reduce discharging direction to the whole industry and change.At control NO
xaspect, walks the control techniques route that key industry adds key area.Continue in-depth Particulate Pollution to control simultaneously.
In order to realize Sustainable development, build Innovation & environment friendly enterprise, complete country with place to pollution reduction responsible ethics, present many petroleum chemical enterprises start to set up dust-removal and desulfurizing denitration facility to flue gas system, flue gas qualified discharge after guarantee purification.Flue-gas dust-removing and desulfurization denitration technology reduces dust, SO in flue gas
2and NO
xthe effective ways of discharge.The technique that current flue gas desulfurization and denitrification adopts is varied, wherein has a kind of organic catalysis smoke comprehensive Treatment process, and it adopts liquid catalyst by SO
2and NO
xbecome sulphur ammonium, ammonium nitrate mixing solutions Deng exhaust gas conversion, can realize SO in same equipment
2and NO
xonce removing, but while desulphurization denitration, also create the abraum salt liquid containing sulphur ammonium and ammonium nitrate, if do not processed abraum salt liquid, will secondary pollution be caused.
Utility model content
The purpose of this utility model is to provide a kind of device preparing sulphur ammonium nitrate mixed fertilizer.
The purpose of this utility model can be achieved through the following technical solutions:
The waste liquid utilizing flue gas desulfurization and denitrification to produce prepares a method for mixed fertilizer, and the method comprises the following steps:
(1) the abraum salt liquid containing sulphur ammonium, ammonium nitrate is delivered to the funnel being positioned at crystallizer top, is carry out vacuum evaporating crystalization under the condition of 40 ~ 90 DEG C in temperature, thus obtains crystal grain; The central circulating tube of described crystal grain below funnel enters fluid crystal district, carries out hydraulic classification herein, obtains oarse-grained crystallized product and fine grain crystallized product after classification respectively;
(2) described oarse-grained crystallized product goes thickener to carry out settlement separate further enrichment through pumping, send to whizzer afterwards again and carry out centrifugation, slip after separation is sent to vibrated fluidized bed through worm conveyor and is carried out drying, after dry, moisture control is below 1%, finally send packaging unit to obtain finished product;
(3) described fine grain crystallized product floats in a crystallizer and enters well heater by recycle pump extraction and heats, and is again delivered to above the funnel being positioned at crystallizer top and carries out vacuum evaporating crystalization after heating.
In abraum salt liquid containing sulphur ammonium, ammonium nitrate in the step (1) of method described in the utility model, the mass concentration of sulphur ammonium, ammonium nitrate and water respectively is 22 ~ 35%, 3 ~ 15% and 50 ~ 75%.
In the step (1) of method described in the utility model, the temperature of vacuum evaporating crystalization is 65 ~ 70 DEG C, and absolute pressure is 20 ~ 40kPa.
Density>=the 1.3g/cm of oarse-grained crystallized product in the step (1) of method described in the utility model
3, the density < 1.3g/cm of fine grain crystallized product
3.
The liquid that in the step (2) of method described in the utility model, thickener and whizzer produce again is delivered to the funnel being positioned at crystallizer top and carries out vacuum evaporating crystalization.
A kind of waste liquid for realizing utilizing flue gas desulfurization and denitrification to produce prepares the device of mixed fertilizer method, this device comprises crystallizer, the middle and upper part of described crystallizer is provided with funnel, is connected with central circulating tube in the below of funnel, and fluid crystal district is positioned at the bottom of crystallizer; The output terminal of well heater is connected with the top of crystallizer, and the input terminus of well heater is connected with the bottom of crystallizer by recycle pump, and the output terminal of crystalliser feet is connected with vibrated fluidized bed with thickener, whizzer, worm conveyor successively by shurry pump.
In the technical scheme of device described in the utility model, the output terminal at crystallizer top is connected with tank by prolong, and water is delivered to desulfuring and denitrifying apparatus reuse by water pump by this tank.The bottom of prolong is also connected with scum dredger, and the output terminal at the top of scum dredger is connected with vacuum pump, for emptying incondensible gas; The output terminal of the bottom of scum dredger is connected with tank.
In the technical scheme of device described in the utility model, the output terminal on thickener top is connected with crystallizer top.Output terminal bottom whizzer is connected with crystallizer top.
In technical solutions of the utility model, fine particle floats and is extracted out by recycle pump and enters well heater, after the tiny crystals that the low-pressure steam heating that is 143 DEG C of absolute pressure 0.3MPa, temperature dissolves wherein, return crystallizer funnel top evaporative crystallization, macrobead crystal extracts centrifugation out again from crystalliser feet.
In technical solutions of the utility model, macrobead be settled down to downwards crystalliser feet by crystallizer shurry pump extract out deliver to the further thickening of thickener after send into whizzer and carry out centrifugation, from whizzer out the moisture ammonium sulfate of about 3 ~ 5%, ammonium nitrate mixture deliver to fluidized bed dryer warm air through worm conveyor and carry out drying, the product of moisture after dry≤1% is sent into wrapping machine through finished product hopper and is packed.The tail gas that fluidized bed dryer produces is sent to desulphurization denitration absorption tower by exhaust fan and is processed after tornado dust collector dedusting.
The beneficial effects of the utility model:
The utility model by liquid containing ammonium sulfate with the crystallization of ammonium nitrate mixed solution, be separated, dry produce fertilizer, and mother liquor after Crystallization Separation is also returned vapo(u)rization system by the utility model, normal production does not have discharge of wastewater, and except drying unit waste gas takes a small amount of fertilizer out of, fertilizer yield is greater than 98.5%.And prior art is separately by sulphur crystalline ammonium, separation, drying process, easily produces containing ammonium nitrate and sulphur ammonium bulk in crystallizer, affect crystallisation process, and fertilizer yield is lower than 80%.
Accompanying drawing explanation
Fig. 1 is the setting drawing that waste liquid that the utility model utilizes flue gas desulfurization and denitrification to produce prepares mixed fertilizer.
1 is well heater, and 2 is recycle pump, and 3 is crystallizer, 301 is funnel, and 302 is central circulating tube, and 303 is crystal structure district, 4 is shurry pump, and 5 is condenser, and 6 is scum dredger, 7 is tank, and 8 is water pump, and 9 is vacuum pump, 10 is thickener, and 11 is whizzer, and 12 is worm conveyor, 13 is vibrated fluidized bed, and 14 is wrapping machine.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but protection domain of the present utility model is not limited thereto:
As shown in Figure 1, a kind of waste liquid for flue gas desulfurization and denitrification generation prepares the device of mixed fertilizer method, this device comprises crystallizer (3), the middle and upper part of described crystallizer (3) is provided with funnel (301), be connected with central circulating tube (302) in the below of funnel (301), fluid crystal district is positioned at the bottom of crystallizer (3); The output terminal of well heater (1) is connected with the top of crystallizer (3), the input terminus of well heater (1) is connected with the bottom of crystallizer (3) by recycle pump (2), and the output terminal of crystallizer (3) bottom is connected with vibrated fluidized bed (13) with thickener (10), whizzer (11), worm conveyor (12) successively by shurry pump (4).The output terminal at crystallizer (3) top is connected with tank (7) by prolong (5), and water is delivered to desulfuring and denitrifying apparatus reuse by water pump (8) by this tank (7).The bottom of prolong (5) is also connected with scum dredger (6), and the output terminal at the top of scum dredger (6) is connected with vacuum pump (9), for emptying incondensible gas; The output terminal of the bottom of scum dredger (6) is connected with tank (7).The output terminal on thickener (10) top is connected with crystallizer (3) top.The output terminal of whizzer (11) bottom is connected with crystallizer (3) top.
Prepare the device of 780 kgs/hour of sulphur ammonium nitrate mixed fertilizer scales, from rare saline solution (raw material saline solution: 1962.01kg/h of desulphurization denitration tower, moisture 60%, sulfur-bearing ammonium 30%, containing ammonium nitrate 9.5%) through pump delivery to the funnel being positioned at crystallizer top, evaporate at this and reach supersaturation and produce microcosmic crystal grain, then enter fluid crystal district through central circulating tube, carry out hydraulic classification at this particle, generate the crystallized product of macrobead particle diameter and the crystallized product of small-particle particle diameter respectively.
Crystallized product (density>=the 1.3g/cm of macrobead particle diameter of described macrobead particle diameter
3) be settled down to downwards crystalliser feet by recycle pump extract out deliver to the further thickening of thickener after send into whizzer and carry out centrifugation, from whizzer out the moisture ammonium sulfate of about 4%, ammonium nitrate mixture deliver to fluidized bed dryer 150 DEG C of warm airs through worm conveyor and carry out drying, the product of moisture after dry≤1% is sent into wrapping machine through finished product hopper and is packed.
Described short grained crystallized product (the density < 1.3g/cm of small-particle particle diameter
3) float and extracted out by crystallizer recycle pump enter that crystallizer well heater absolute pressure is 0.35MPa, temperature is return crystallizer funnel top evaporative crystallization again after the low-pressure steam of 143 DEG C heats the tiny crystals dissolved wherein.
From crystallizer top, steam out adopts condenser to cool, and condenser external is provided with recirculated cooling water, and cooled water flows into tank and send desulfuring and denitrifying apparatus reuse through water pump.Non-condensable gases flows into scum dredger, and gas adopts vacuum pump to take away emptying, and a small amount of liquid sends into tank.The liquid that thickener and whizzer produce sends into crystallizer evaporative crystallization again.The tail gas that fluidized bed dryer produces is sent to desulphurization denitration absorption tower by exhaust fan and is processed after tornado dust collector dedusting.In these technical solutions of the utility model, after Crystallization Separation, mother liquor returns vapo(u)rization system, and normal production does not have discharge of wastewater, and drying unit combustion gas qualified discharge, fertilizer yield reaches 98.75%
Prevailing operating conditions and technical indicator as follows:
1) operation index and specification of equipment
2) product specification:
Product is the mixed fertilizer of sulphur ammonium and ammonium nitrate, wherein sulfur-bearing ammonium 75%, ammonium nitrate 24%, moisture content≤1%.
Claims (5)
1. the waste liquid utilizing flue gas desulfurization and denitrification to produce prepares the device of mixed fertilizer, it is characterized in that: this device comprises crystallizer (3), the middle and upper part of described crystallizer (3) is provided with funnel (301), be connected with central circulating tube (302) in the below of funnel (301), fluid crystal district is positioned at the bottom of crystallizer (3); The output terminal of well heater (1) is connected with the top of crystallizer (3), the input terminus of well heater (1) is connected with the bottom of crystallizer (3) by recycle pump (2), and the output terminal of crystallizer (3) bottom is connected with vibrated fluidized bed (13) with thickener (10), whizzer (11), worm conveyor (12) successively by shurry pump (4).
2. device according to claim 1, it is characterized in that: the output terminal at crystallizer (3) top is connected with tank (7) by prolong (5), and water is delivered to desulfuring and denitrifying apparatus reuse by water pump (8) by this tank (7).
3. device according to claim 1, it is characterized in that: the bottom of prolong (5) is also connected with scum dredger (6), the output terminal at the top of scum dredger (6) is connected with vacuum pump (9), for emptying incondensible gas; The output terminal of the bottom of scum dredger (6) is connected with tank (7).
4. device according to claim 1, is characterized in that: the output terminal on thickener (10) top is connected with crystallizer (3) top.
5. device according to claim 1, is characterized in that: the output terminal of whizzer (11) bottom is connected with crystallizer (3) top.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520679856.6U CN204981685U (en) | 2015-09-01 | 2015-09-01 | Device of mixed fertilizer is prepared to waste liquid that utilizes flue gas desulfurization denitration to produce |
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|---|---|---|---|
| CN201520679856.6U CN204981685U (en) | 2015-09-01 | 2015-09-01 | Device of mixed fertilizer is prepared to waste liquid that utilizes flue gas desulfurization denitration to produce |
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| CN204981685U true CN204981685U (en) | 2016-01-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060995A (en) * | 2015-09-01 | 2015-11-18 | 中石化南京工程有限公司 | Method and device for preparing mixed fertilizer by using waste liquid generated by flue gas desulfurization and denitrification |
-
2015
- 2015-09-01 CN CN201520679856.6U patent/CN204981685U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060995A (en) * | 2015-09-01 | 2015-11-18 | 中石化南京工程有限公司 | Method and device for preparing mixed fertilizer by using waste liquid generated by flue gas desulfurization and denitrification |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |