CN105417602B - Large granule urea plant liquid waste treating apparatus and processing method - Google Patents
Large granule urea plant liquid waste treating apparatus and processing method Download PDFInfo
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- CN105417602B CN105417602B CN201510814307.XA CN201510814307A CN105417602B CN 105417602 B CN105417602 B CN 105417602B CN 201510814307 A CN201510814307 A CN 201510814307A CN 105417602 B CN105417602 B CN 105417602B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
- C07C273/14—Separation; Purification; Stabilisation; Use of additives
- C07C273/16—Separation; Purification
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Abstract
The invention belongs to a kind of large granule urea plant liquid waste treating apparatus and processing method；Including large granule urea plant, urea liquid conveyance conduit, large granule urea plant is connected by steam heater with the import of gas-liquid separator, gas vent at the top of gas-liquid separator is connected with the tube side of condenser and the top of reservoir successively by pipeline, reservoir bottom is provided with liquid outlet and circulation liquid outlet, the liquid that reservoir liquid outlet sends pump outside equipped with band sends pipeline outside, reservoir circulation liquid outlet is connected by liquid-inlet of the pipeline successively with circulating pump and injector, the exhaust outlet on the tube side top of condenser is connected by pipeline with the gas feed of injector, the outlet of injector is connected by pipeline with the circulation inlet at the top of reservoir, the top of reservoir is provided with gas exhausting pipeline；It is simple with small investment, technique, the advantages of operating cost is low, controllability is strong, solve the difficult bottleneck of liquid waste processing, immeasurable economic and social benefit is brought for enterprise.
Description
Technical field
The invention belongs to granular urea waste liquid recycling technical field, and in particular to a kind of large granule urea plant waste liquid
Processing unit and processing method.
Background technology
In existing common urea forms a complete production network large granule urea plant, the washing that concentration is 43~55% can be all produced
Waste liquid；At present, what most of urea enterprise used be all this part waste liquid is returned to it is again sharp in common urea production system
Method.Although the above method is simple, directly still there is also following shortcoming：First, bulky grain device waste liquid returns to common urine
In plain production system, recycling process route is longer, and consumption is larger, and can also influence the stabilization of common urea production system
Property, cause frequent operation, security performance reduces；Second, bulky grain can all add formalin to increase urea in process of production
Intensity, and common urea produce and formaldehyde need not be added, or even the enterprise's PARA FORMALDEHYDE PRILLS(91,95) having content also have be strict with, such as
Fruit returns to waste liquid caused by bulky grain device in common urea production system, then can cause shadow to the purity of common urea
Ring；Third, current many enterprises utilize bulky grain device research and development urea new product, it is often necessary to add in bulky grain device
Add some new materials, agent, polypeptide, humic acid are lost in such as control, and the waste liquid containing novel substance can not then return to common urea
In production system, it can only sell or destroy outside.
The content of the invention
The defects of it is an object of the invention to overcome in the prior art and provide it is a kind of it is simple in construction, reasonable in design, can grasp
Control property is strong, effective recycling can be carried out to large granule urea plant waste liquid, reduces enterprise's production cost, solve it is useless
The difficult large granule urea plant liquid waste treating apparatus of liquid discharge and processing method.
The object of the present invention is achieved like this：It is connected including large granule urea plant, with large granule urea plant import
Urea liquid conveyance conduit, the tube side import phase that the waste liquid outlet of large granule urea plant passes through pipeline and steam heater
Even, the tube side outlet of steam heater is connected by pipeline with the import of gas-liquid separator, and the gas at the top of gas-liquid separator goes out
Mouth is connected with the tube side of condenser and the top of reservoir successively by pipeline, and the bottom of the reservoir is respectively equipped with liquid outlet
With circulation liquid outlet, the liquid that the reservoir liquid outlet is provided with sending outside pump sends pipeline outside, and the reservoir recycles liquid
Mouth is connected by liquid-inlet of the pipeline successively with circulating pump and injector, and the exhaust outlet on the tube side top of condenser passes through pipeline
It is connected with the gas feed of injector, the outlet of injector is connected by pipeline with the circulation inlet at the top of reservoir, described
The top of reservoir is provided with gas exhausting pipeline；The liquid outlet of gas-liquid separator bottom passes through pipeline and urea liquid delivery pipe
The end of the 3rd threeway the 3rd on road is connected, and pipe-line mixer is provided between the 3rd threeway and large granule urea plant；Institute
State the import of steam heater shell side with low-pressure steam pipeline to be connected, steam heater shell-side outlet is connected with condensate liquid pipeline；Institute
State condenser shell side import with cooling circulating water pipeline to be connected, the import of condenser shell side is connected with cooling circulating water water return pipeline.
Pipeline between the waste liquid outlet of the large granule urea plant and the tube side of steam heater is provided with the one or three
Logical, the 3rd end of first threeway is connected with common urea process units.
Pipeline between the liquid outlet of the gas-liquid separator bottom and the end of the 3rd threeway the 3rd is provided with the second threeway,
3rd end of second threeway, which is provided with, sends pipeline outside.
The liquid, which sends Pipe installing outside, the first valve.
The 4th valve is provided between the end of 3rd threeway the 3rd and the second threeway.
The second valve is installed on pipeline between first threeway and the tube side of steam heater；First threeway
The 3rd end and common urea process units between the 3rd valve is installed.
Described send outside is provided with the 3rd valve on pipeline.
A kind of processing method of large granule urea plant liquid waste treating apparatus, comprises the following steps：
First, urinated from the urea liquid that urea liquid conveyance conduit comes by the 3rd threeway and pipe-line mixer into bulky grain
White, quiet clothes put production granular urea, and produce the waste liquid that urea concentration is 43%~55% and gone out by the waste liquid of large granule urea plant
Mouth discharge；
2nd, the urea concentration that the step 1 is discharged by the waste liquid outlet of large granule urea plant be 43%~55% it is useless
Liquid enters the tube side of steam heater, above-mentioned waste liquid is exchanged heat in steam heater shell side by low-pressure steam, after heat exchange
Waste liquid enters in the middle part of gas-liquid separator, and the waste liquid temperature after the heat exchange rises to 104~111 DEG C by 40~50 DEG C；
3rd, the waste liquid entered in the step 2 in the middle part of gas-liquid separator is separated into liquid and gas two parts, concentrates
Liquid concentration afterwards is 70%~80%, and it enters urea liquid delivery pipe by the second threeway, the 4th valve and the 3rd threeway
Road, it is mixed with the urea liquid that concentration in urea liquid conveyance conduit is 99% in pipe-line mixer, forms concentration
Enter granular urea device production granular urea for 96% urea liquid；The 3rd is closed while opening four valve
Valve；
4th, entered in the step 3 by the gas that gas-liquid separator separates go out by the gas vent at the top of gas-liquid separator
Enter the tube side of condenser, above-mentioned gas are carried out with heat exchange cooling into condenser shell side by cooling circulating water, after heat exchange cooling
Gas is divided into water and incoagulable gas；Temperature after above-mentioned gas heat exchange cooling is 40~50 DEG C；
5th, the water in the step 4 after heat exchange cooling enters in reservoir, and forms loop with circulating pump and injector,
Incoagulable gas in the step 4 enters reservoir by the gas feed of condenser tube side upper air vent and injector
It is interior, condenser tube side is vacuumized by the effect of injector, and the processing unit is in negative pressure state, pressure is：-
0.034MPa；
6th, the incoagulable gas entered in the step 5 in reservoir is discharged by gas exhausting pipeline；
7th, when the liquid level of liquid storage trough inner water is not less than 2/3 in the step 4, the first valve is opened, unlatching is sent pump outside, made
Water discharges reservoir；When the liquid level of liquid storage trough inner water is not more than 1/2, pump and the first valve are sent in closing outside；
8th, when the processing unit is in dead ship condition or service mode, by large granule urea plant in the step 1
The waste liquid that waste liquid outlet discharge urea concentration is 43%~55% is directly entered by the 3rd end of the first threeway and the 3rd valve
Raw material in common urea process units as common urea uses；
9th, when the liquid concentration after needing to concentrate is recycled or sold by other means for 70%~80% urea,
Liquid concentration after being concentrated in the step 3 is 70%~80%, and it is arranged by the 3rd end of the second threeway and the 3rd valve
The 4th valve is closed while going out, then open three valves.
The present invention is set by newly-increased steam heater, gas-liquid separator, condenser, reservoir, circulating pump, injector etc.
It is standby, process route and technological parameter are rationally designed, under the conditions of 104~111 DEG C of temperature, pressure -0.034MPa, bulky grain is filled
The high concentration urea solution that the waste liquid concentration that concentration caused by putting is 43%~55% is 70%~80%, and return to bulky grain dress
Charging aperture recycling is put, makes full use of the elasticity design of bulky grain device feedstock, by the urine that former input concentration is 99%
Liquid is reduced to 96% charging, waste liquid is realized from the purpose to disappear is originated from, so as to which the dilute waste liquid for changing existing 43%~55% returns
The drawbacks of common urea production system, the cost consumption and potential safety hazard of urea system are greatly reduced, avoid bulky grain dress
Put the influence in every respect to common urea system；Simple with small investment, technique, it is excellent that operating cost is low, controllability is strong etc.
Point, it is most important that solve the bottleneck for the liquid waste processing hardly possible that enterprise runs into new product production, bring and can not estimate for enterprise
The economic and social benefit of amount.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, now control illustrates this hair
Bright embodiment, in the various figures identical label represent identical part.To make simplified form, in each figure only schematically
Ground indicates the part related to invention, and they do not represent its practical structures as product.
As shown in figure 1, the present invention is molten including large granule urea plant 1, the urea being connected with the import of large granule urea plant 1
Liquid conveyance conduit 9, the waste liquid outlet of large granule urea plant 1 are connected by pipeline with the tube side import of steam heater 2, steam
The tube side outlet of heater 2 is connected by pipeline with the import of gas-liquid separator 3, and the gas vent at the top of gas-liquid separator 3 leads to
Piping is connected with the tube side of condenser 4 and the top of reservoir 5 successively, and the bottom of the reservoir 5 is respectively equipped with liquid outlet
With circulation liquid outlet, the liquid that the liquid outlet of reservoir 5 is provided with sending outside pump 8 sends pipeline 14 outside, and the reservoir 5 circulates
Liquid outlet is connected by liquid-inlet of the pipeline successively with circulating pump 6 and injector 7, the exhaust outlet on the tube side top of condenser 4
It is connected by pipeline with the gas feed of injector 7, the outlet of injector 7 passes through pipeline and the circulation feed liquor at the top of reservoir 5
Mouth is connected, and the top of the reservoir 5 is provided with gas exhausting pipeline 10；The liquid outlet of the bottom of gas-liquid separator 3 passes through pipeline
Be connected with the end of the 3rd threeway 23 the 3rd on urea liquid conveyance conduit 9, the 3rd threeway 23 and large granule urea plant 1 it
Between pipe-line mixer 24 is installed；The shell side import of steam heater 2 is connected with low-pressure steam pipeline 19, steam heater 2
Shell-side outlet is connected with condensate liquid pipeline 20；The shell side import of condenser 4 is connected with cooling circulating water pipeline 21, condenser 4
Shell side import is connected with cooling circulating water water return pipeline 22.The waste liquid outlet of the large granule urea plant 1 and steam heater 2
Tube side between pipeline be provided with the first threeway 11, the 3rd end and the phase of common urea process units 26 of first threeway 11
Even.Pipeline between the liquid outlet of the bottom of gas-liquid separator 3 and the end of the 3rd threeway 23 the 3rd is provided with the second threeway 12,
3rd end of second threeway 12, which is provided with, sends pipeline 13 outside.The liquid sends pipeline 14 outside and is provided with the first valve 15.Institute
State and be provided with the 4th valve 25 between the end of the 3rd threeway 23 the 3rd and the second threeway 12.First threeway 11 and steam heater
Second valve 16 is installed on the pipeline between 2 tube side；3rd end of first threeway 11 and common urea process units
3rd valve 17 is installed between 26.Described send outside is provided with the 3rd valve 18 on pipeline 13.
A kind of processing method of large granule urea plant liquid waste treating apparatus, comprises the following steps：
First, entered greatly by the 3rd threeway 23 and pipe-line mixer 24 from the urea liquid of urea liquid conveyance conduit 9
Granular urea device 1 produce granular urea, and produce urea concentration be 43%~55% waste liquid by large granule urea plant 1
Waste liquid outlet discharge；
2nd, the urea concentration that the step 1 is discharged by the waste liquid outlet of large granule urea plant 1 is 43%~55%
Waste liquid enters the tube side of steam heater 2, and above-mentioned waste liquid is exchanged heat in the shell side of steam heater 2 by low-pressure steam, exchanges heat
Waste liquid afterwards enters the middle part of gas-liquid separator 3, and the waste liquid temperature after the heat exchange rises to 104~111 DEG C by 40~50 DEG C；
3rd, the waste liquid for entering the middle part of gas-liquid separator 3 in the step 2 is separated into liquid and gas two parts, concentrates
Liquid concentration afterwards is 70%~80%, and it enters urea liquid by the second threeway 12, the 4th valve 25 and the 3rd threeway 23
Conveyance conduit 9, it is mixed with the urea liquid that concentration in urea liquid conveyance conduit 9 is 99% in pipe-line mixer 24
Close, form the urea liquid that concentration is 96% and enter the production granular urea of granular urea device 1；Open the 4th valve 25
While close the 3rd valve 18；
4th, the gas vent in the step 3 by the gas that gas-liquid separator 3 is isolated by the top of gas-liquid separator 3
Into the tube side of condenser 4, above-mentioned gas are carried out with heat exchange cooling, heat exchange cooling into the shell side of condenser 4 by cooling circulating water
Gas afterwards is divided into water and incoagulable gas；Temperature after above-mentioned gas heat exchange cooling is 40~50 DEG C；
5th, the water in the step 4 after heat exchange cooling enters in reservoir 5, and is formed back with circulating pump 6 and injector 7
Road, the gas feed that the incoagulable gas in the step 4 passes through the tube side upper air vent of condenser 4 and injector 7 enter storage
In liquid bath 5, the tube side of condenser 4 is vacuumized by the effect of injector 7, and the processing unit is in negative pressure state, pressure
For：-0.034MPa；
6th, the incoagulable gas entered in the step 5 in reservoir 5 is discharged by gas exhausting pipeline 10；
7th, when the liquid level of water is not less than 2/3 in reservoir 5 in the step 4, the first valve 15 is opened, pump is sent in unlatching outside
8, water is discharged reservoir 5；When the liquid level of water in reservoir 5 is not more than 1/2, the valve 15 of pump 8 and first is sent in closing outside；
8th, when the processing unit is in dead ship condition or service mode, by large granule urea plant 1 in the step 1
The waste liquid that waste liquid outlet discharge urea concentration is 43%~55% is direct by the 3rd end of the first threeway 11 and the 3rd valve 17
Raw material into common urea process units 26 as common urea uses；
9th, when the liquid concentration after needing to concentrate is recycled or sold by other means for 70%~80% urea,
Liquid concentration after being concentrated in the step 3 is 70%~80%, its 3rd end by the second threeway 12 and the 3rd valve 18
The 4th valve 25 is closed while discharging, then open the 3rd valve 18.
The raw material of large granule urea plant 1 of the present invention is 96%~99% urea liquid；It can be commercially direct
Its structure is purchased to repeat no more.The first end of first threeway 11 is connected with the waste liquid outlet of large granule urea plant 1, and it second
Several mouthfuls with the tube side of steam heater 2 of end is connected, and the 3rd end is entered by the raw material of the 3rd valve 17 and common urea process units
Mouth is connected；The first end of second threeway is connected with the liquid outlet of the bottom of gas-liquid separator 3, and its second end passes through the 4th valve
Door 25 is connected with the end of the 3rd threeway 23 the 3rd, is provided with the 3rd end and sends pipeline 13 outside；The first end of 3rd threeway 23 with
Urea liquid conveyance conduit 9 is connected, and its second end is connected with pipe-line mixer 24.
For the more detailed explanation present invention, the present invention is further elaborated in conjunction with embodiment.Specific embodiment
It is as follows：
Embodiment one
A kind of processing method of large granule urea plant liquid waste treating apparatus, comprises the following steps：
First, entered greatly by the 3rd threeway 23 and pipe-line mixer 24 from the urea liquid of urea liquid conveyance conduit 9
Granular urea device 1 produce granular urea, and produce urea concentration be 43% waste liquid by large granule urea plant 1 waste liquid
Outlet discharge；
2nd, the waste liquid that the urea concentration that the step 1 is discharged by the waste liquid outlet of large granule urea plant 1 is 43% enters
Enter the tube side of steam heater 2, above-mentioned waste liquid is exchanged heat in the shell side of steam heater 2 by low-pressure steam, it is useless after heat exchange
Liquid enters the middle part of gas-liquid separator 3, and the waste liquid temperature after the heat exchange rises to 104 DEG C by 40 DEG C；
3rd, the waste liquid for entering the middle part of gas-liquid separator 3 in the step 2 is separated into liquid and gas two parts, concentrates
Liquid concentration afterwards is 70%, and it enters urea liquid delivery pipe by the second threeway 12, the 4th valve 25 and the 3rd threeway 23
Road 9, it is mixed in pipe-line mixer 24 with the urea liquid that concentration in urea liquid conveyance conduit 9 is 99%, formed
The urea liquid that concentration is 96% enters granular urea device 1 and produces granular urea；While opening the 4th valve 25
Close the 3rd valve 18；
4th, the gas vent in the step 3 by the gas that gas-liquid separator 3 is isolated by the top of gas-liquid separator 3
Into the tube side of condenser 4, above-mentioned gas are carried out with heat exchange cooling, heat exchange cooling into the shell side of condenser 4 by cooling circulating water
Gas afterwards is divided into water and incoagulable gas；Temperature after above-mentioned gas heat exchange cooling is 40~50 DEG C；
5th, the water in the step 4 after heat exchange cooling enters in reservoir 5, and is formed back with circulating pump 6 and injector 7
Road, the gas feed that the incoagulable gas in the step 4 passes through the tube side upper air vent of condenser 4 and injector 7 enter storage
In liquid bath 5, the tube side of condenser 4 is vacuumized by the effect of injector 7, and the processing unit is in negative pressure state, pressure
For：-0.034MPa；
6th, the incoagulable gas entered in the step 5 in reservoir 5 is discharged by gas exhausting pipeline 10；
7th, when the liquid level of water is not less than 2/3 in reservoir 5 in the step 4, the first valve 15 is opened, pump is sent in unlatching outside
8, water is discharged reservoir 5；When the liquid level of water in reservoir 5 is not more than 1/2, the valve 15 of pump 8 and first is sent in closing outside.
Embodiment two
A kind of processing method of large granule urea plant liquid waste treating apparatus, comprises the following steps：
First, entered greatly by the 3rd threeway 23 and pipe-line mixer 24 from the urea liquid of urea liquid conveyance conduit 9
Granular urea device 1 produce granular urea, and produce urea concentration be 55% waste liquid by large granule urea plant 1 waste liquid
Outlet discharge；
2nd, the waste liquid that the urea concentration that the step 1 is discharged by the waste liquid outlet of large granule urea plant 1 is 55% enters
Enter the tube side of steam heater 2, above-mentioned waste liquid is exchanged heat in the shell side of steam heater 2 by low-pressure steam, it is useless after heat exchange
Liquid enters the middle part of gas-liquid separator 3, and the waste liquid temperature after the heat exchange rises to 111 DEG C by 50 DEG C；
3rd, the waste liquid for entering the middle part of gas-liquid separator 3 in the step 2 is separated into liquid and gas two parts, concentrates
Liquid concentration afterwards is 80%, and it enters urea liquid delivery pipe by the second threeway 12, the 4th valve 25 and the 3rd threeway 23
Road 9, it is mixed in pipe-line mixer 24 with the urea liquid that concentration in urea liquid conveyance conduit 9 is 99%, formed
The urea liquid that concentration is 96% enters granular urea device 1 and produces granular urea；While opening the 4th valve 25
Close the 3rd valve 18；
4th, the gas vent in the step 3 by the gas that gas-liquid separator 3 is isolated by the top of gas-liquid separator 3
Into the tube side of condenser 4, above-mentioned gas are carried out with heat exchange cooling, heat exchange cooling into the shell side of condenser 4 by cooling circulating water
Gas afterwards is divided into water and incoagulable gas；Temperature after above-mentioned gas heat exchange cooling is 50 DEG C；
5th, the water in the step 4 after heat exchange cooling enters in reservoir 5, and is formed back with circulating pump 6 and injector 7
Road, the gas feed that the incoagulable gas in the step 4 passes through the tube side upper air vent of condenser 4 and injector 7 enter storage
In liquid bath 5, the tube side of condenser 4 is vacuumized by the effect of injector 7, and the processing unit is in negative pressure state, pressure
For：-0.034MPa；
6th, the incoagulable gas entered in the step 5 in reservoir 5 is discharged by gas exhausting pipeline 10；
7th, when the liquid level of water is not less than 2/3 in reservoir 5 in the step 4, the first valve 15 is opened, pump is sent in unlatching outside
8, water is discharged reservoir 5；When the liquid level of water in reservoir 5 is not more than 1/2, the valve 15 of pump 8 and first is sent in closing outside.
Embodiment three
A kind of processing method of large granule urea plant liquid waste treating apparatus, comprises the following steps：
First, entered greatly by the 3rd threeway 23 and pipe-line mixer 24 from the urea liquid of urea liquid conveyance conduit 9
Granular urea device 1 produce granular urea, and produce urea concentration be 49% waste liquid by large granule urea plant 1 waste liquid
Outlet discharge；
2nd, the waste liquid that the urea concentration that the step 1 is discharged by the waste liquid outlet of large granule urea plant 1 is 49% enters
Enter the tube side of steam heater 2, above-mentioned waste liquid is exchanged heat in the shell side of steam heater 2 by low-pressure steam, it is useless after heat exchange
Liquid enters the middle part of gas-liquid separator 3, and the waste liquid temperature after the heat exchange rises to 107.5 DEG C by 45 DEG C；
3rd, the waste liquid for entering the middle part of gas-liquid separator 3 in the step 2 is separated into liquid and gas two parts, concentrates
Liquid concentration afterwards is 75%, and it enters urea liquid delivery pipe by the second threeway 12, the 4th valve 25 and the 3rd threeway 23
Road 9, it is mixed in pipe-line mixer 24 with the urea liquid that concentration in urea liquid conveyance conduit 9 is 99%, formed
The urea liquid that concentration is 96% enters granular urea device 1 and produces granular urea；While opening the 4th valve 25
Close the 3rd valve 18；
4th, the gas vent in the step 3 by the gas that gas-liquid separator 3 is isolated by the top of gas-liquid separator 3
Into the tube side of condenser 4, above-mentioned gas are carried out with heat exchange cooling, heat exchange cooling into the shell side of condenser 4 by cooling circulating water
Gas afterwards is divided into water and incoagulable gas；Temperature after above-mentioned gas heat exchange cooling is 45 DEG C；
5th, the water in the step 4 after heat exchange cooling enters in reservoir 5, and is formed back with circulating pump 6 and injector 7
Road, the gas feed that the incoagulable gas in the step 4 passes through the tube side upper air vent of condenser 4 and injector 7 enter storage
In liquid bath 5, the tube side of condenser 4 is vacuumized by the effect of injector 7, and the processing unit is in negative pressure state, pressure
For：-0.034MPa；
6th, the incoagulable gas entered in the step 5 in reservoir 5 is discharged by gas exhausting pipeline 10；
7th, when the liquid level of water is not less than 2/3 in reservoir 5 in the step 4, the first valve 15 is opened, pump is sent in unlatching outside
8, water is discharged reservoir 5；When the liquid level of water in reservoir 5 is not more than 1/2, the valve 15 of pump 8 and first is sent in closing outside.
Example IV
A kind of processing method of large granule urea plant liquid waste treating apparatus, comprises the following steps：
First, entered greatly by the 3rd threeway 23 and pipe-line mixer 24 from the urea liquid of urea liquid conveyance conduit 9
Granular urea device 1 produce granular urea, and produce urea concentration be 55% waste liquid by large granule urea plant 1 waste liquid
Outlet discharge；
2nd, when the processing unit is in dead ship condition or service mode, given up in the step 1 by large granule urea plant 1
The waste liquid that discharge urea concentration in liquid outlet is 43%~55% is directly entered by the 3rd end and the 3rd valve 17 of the first threeway 11
Enter the raw material in common urea process units as common urea to use.
Embodiment five
A kind of processing method of large granule urea plant liquid waste treating apparatus, comprises the following steps：
First, entered greatly by the 3rd threeway 23 and pipe-line mixer 24 from the urea liquid of urea liquid conveyance conduit 9
Granular urea device 1 produce granular urea, and produce urea concentration be 43% waste liquid by large granule urea plant 1 waste liquid
Outlet discharge；
2nd, the waste liquid that the urea concentration that the step 1 is discharged by the waste liquid outlet of large granule urea plant 1 is 43% enters
Enter the tube side of steam heater 2, above-mentioned waste liquid is exchanged heat in the shell side of steam heater 2 by low-pressure steam, it is useless after heat exchange
Liquid enters the middle part of gas-liquid separator 3, and the waste liquid temperature after the heat exchange rises to 104 DEG C by 40 DEG C；
3rd, the waste liquid for entering the middle part of gas-liquid separator 3 in the step 2 is separated into liquid and gas two parts, concentrates
Liquid concentration afterwards is 70%%, it is necessary to which the liquid concentration after concentrating is 70%% urea recycles or sell by other means
When, it is discharged by the 3rd end and the 3rd valve 18 of the second threeway 12, then closes the 4th valve while open the 3rd valve 18
Door 25；
4th, the gas vent in the step 3 by the gas that gas-liquid separator 3 is isolated by the top of gas-liquid separator 3
Into the tube side of condenser 4, above-mentioned gas are carried out with heat exchange cooling, heat exchange cooling into the shell side of condenser 4 by cooling circulating water
Gas afterwards is divided into water and incoagulable gas；Temperature after above-mentioned gas heat exchange cooling is 40 DEG C；
5th, the water in the step 4 after heat exchange cooling enters in reservoir 5, and is formed back with circulating pump 6 and injector 7
Road, the gas feed that the incoagulable gas in the step 4 passes through the tube side upper air vent of condenser 4 and injector 7 enter storage
In liquid bath 5, the tube side of condenser 4 is vacuumized by the effect of injector 7, and the processing unit is in negative pressure state, pressure
For：-0.034MPa；
6th, the incoagulable gas entered in the step 5 in reservoir 5 is discharged by gas exhausting pipeline 10；
7th, when the liquid level of water is not less than 2/3 in reservoir 5 in the step 4, the first valve 15 is opened, pump is sent in unlatching outside
8, water is discharged reservoir 5；When the liquid level of water in reservoir 5 is not more than 1/2, the valve 15 of pump 8 and first is sent in closing outside.
Those listed above is a series of to be described in detail only for feasibility embodiment of the invention specifically
Bright, they simultaneously are not used to limit the scope of the invention, all equivalent implementations made without departing from skill spirit of the present invention
Or change should be included in the scope of the protection.It is to be noted that herein, " first ", " second " etc. are only used
In mutual differentiation, rather than represent their significance level and order etc..
Claims (2)
1. a kind of large granule urea plant liquid waste treating apparatus, including large granule urea plant (1) and large granule urea plant
(1) the connected urea liquid conveyance conduit (9) of import, it is characterised in that：The waste liquid outlet of large granule urea plant (1) passes through pipe
Road is connected with the tube side import of steam heater (2), and the tube side outlet of steam heater (2) passes through pipeline and gas-liquid separator
(3) import is connected, and the gas vent at the top of gas-liquid separator (3) passes through the pipeline successively tube side and liquid storage with condenser (4)
The top of groove (5) is connected, and the bottom of the reservoir (5) is respectively equipped with liquid outlet and circulation liquid outlet, and the reservoir (5) goes out
The liquid that liquid mouth is provided with sending outside pump (8) sends pipeline (14) outside, reservoir (5) the circulation liquid outlet by pipeline successively with
Circulating pump (6) is connected with the liquid-inlet of injector (7), and the exhaust outlet on the tube side top of condenser (4) passes through pipeline and injection
The gas feed of device (7) is connected, and the outlet of injector (7) is connected by pipeline with the circulation inlet at the top of reservoir (5), institute
The top for stating reservoir (5) is provided with gas exhausting pipeline (10)；The liquid outlet of gas-liquid separator (3) bottom is by pipeline with setting
The end of the 3rd threeway (23) the 3rd put on urea liquid conveyance conduit (9) is connected, and the 3rd threeway (23) is urinated with bulky grain
White, quiet clothes are provided with pipe-line mixer (24) between putting (1)；Steam heater (2) the shell side import and low-pressure steam pipeline (19)
It is connected, steam heater (2) shell-side outlet is connected with condensate liquid pipeline (20)；Condenser (4) the shell side import follows with cooling
Ring waterpipe (21) is connected, and condenser (4) shell side import is connected with cooling circulating water water return pipeline (22)；
Pipeline between the waste liquid outlet of the large granule urea plant (1) and the tube side of steam heater (2) is provided with first
Threeway (11), the 3rd end of first threeway (11) are connected with common urea process units (26)；
Pipeline between the liquid outlet of gas-liquid separator (3) bottom and the end of the 3rd threeway (23) the 3rd is provided with the two or three
Logical (12), the 3rd end of second threeway (12), which is provided with, sends pipeline (13) outside；
The liquid sends pipeline (14) outside and is provided with the first valve (15)；
The 4th valve (25) is provided between the end of 3rd threeway (23) the 3rd and the second threeway (12)；
The second valve (16) is installed on pipeline between first threeway (11) and the tube side of steam heater (2)；It is described
The 3rd valve (17) is installed between 3rd end of the first threeway (11) and common urea process units (26)；
Described send outside is provided with the 3rd valve (18) on pipeline (13).
2. a kind of processing method using large granule urea plant liquid waste treating apparatus as claimed in claim 1, its feature exists
In：The processing method comprises the following steps：
First, enter from the urea liquid that urea liquid conveyance conduit (9) comes by the 3rd threeway (23) and pipe-line mixer (24)
Large granule urea plant (1) produce granular urea, and produce urea concentration be 43%~55% waste liquid by granular urea
The waste liquid outlet discharge of device (1)；
2nd, the urea concentration that the step 1 is discharged by the waste liquid outlet of large granule urea plant (1) be 43%~55% it is useless
Liquid enters the tube side of steam heater (2), and above-mentioned waste liquid is exchanged heat in steam heater (2) shell side by low-pressure steam, changed
Waste liquid after heat enters in the middle part of gas-liquid separator (3), and the waste liquid temperature after the heat exchange rises to 104~111 by 40~50 DEG C
℃；
3rd, the waste liquid entered in the step 2 in the middle part of gas-liquid separator (3) is separated into liquid and gas two parts, after concentration
Liquid concentration be 70%~80%, it enters urea by the second threeway (12), the 4th valve (25) and the 3rd threeway (23)
Solution delivery line (9), the urea liquid that it is 99% with urea liquid conveyance conduit (9) interior concentration is in pipe-line mixer (24)
Inside mixed, form the urea liquid that concentration is 96% and enter granular urea device (1) production granular urea；Described in unlatching
The 3rd valve (18) is closed while 4th valve (25)；
4th, the gas vent at the top of gas-liquid separator (3) is passed through by the gas that gas-liquid separator (3) is isolated in the step 3
Into the tube side of condenser (4), heat exchange cooling is carried out to above-mentioned gas into condenser (4) shell side by cooling circulating water, exchanged heat
Gas after cooling is divided into water and incoagulable gas；Temperature after above-mentioned gas heat exchange cooling is 40~50 DEG C；
5th, the water in the step 4 after heat exchange cooling enters in reservoir (5), and is formed with circulating pump (6) and injector (7)
Loop, the gas feed that the incoagulable gas in the step 4 passes through condenser (4) tube side upper air vent and injector (7)
In into reservoir (5), condenser (4) tube side is vacuumized by the effect of injector (7), and the processing unit is in negative
Pressure condition, pressure are：-0.034MPa；
6th, the incoagulable gas entered in the step 5 in reservoir (5) is discharged by gas exhausting pipeline (10)；
7th, when the liquid level of reservoir (5) interior water is not less than 2/3 in the step 4, the first valve (15) is opened, pump is sent in unlatching outside
(8) water, is made to discharge reservoir (5)；When the liquid level of reservoir (5) interior water is not more than 1/2, pump (8) and the first valve are sent in closing outside
Door (15)；
8th, it is useless by large granule urea plant (1) in the step 1 when the processing unit is in dead ship condition or service mode
The waste liquid that discharge urea concentration in liquid outlet is 43%~55% is straight by the 3rd end of the first threeway (11) and the 3rd valve (17)
Tap into and used into the raw material in common urea process units (26) as common urea；
9th, it is described when the liquid concentration after needing to concentrate is recycled or sold by other means for 70%~80% urea
Liquid concentration after being concentrated in step 3 is 70%~80%, its 3rd end by the second threeway (12) and the 3rd valve (18)
The 4th valve (25) is closed while discharging, then open the 3rd valve (18).
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| CN201510814307.XA CN105417602B (en) | 2015-11-23 | 2015-11-23 | Large granule urea plant liquid waste treating apparatus and processing method |
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| CN201510814307.XA CN105417602B (en) | 2015-11-23 | 2015-11-23 | Large granule urea plant liquid waste treating apparatus and processing method |
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| JP2002346586A (en) * | 2001-05-21 | 2002-12-03 | Kurita Water Ind Ltd | Method and apparatus for treating waste liquid |
| CN101696177A (en) * | 2009-11-02 | 2010-04-21 | 河南心连心化肥有限公司 | Device for processing urea process condensate and method thereof |
| JP2011072973A (en) * | 2009-10-02 | 2011-04-14 | Sasakura Engineering Co Ltd | Treatment device and treatment method for waste liquid comprising basic substance having volatility |
| CN203315766U (en) * | 2013-07-11 | 2013-12-04 | 新疆天运化工有限公司 | Evaporation prilling device for preparing urea |
| CN203346108U (en) * | 2013-06-25 | 2013-12-18 | 贵州宜化化工有限责任公司 | Urea waste liquid treatment device |
| CN205294871U (en) * | 2015-11-23 | 2016-06-08 | 河南心连心化肥有限公司 | Large granule urea device waste liquid treatment device |
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- 2015-11-23 CN CN201510814307.XA patent/CN105417602B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002346586A (en) * | 2001-05-21 | 2002-12-03 | Kurita Water Ind Ltd | Method and apparatus for treating waste liquid |
| JP2011072973A (en) * | 2009-10-02 | 2011-04-14 | Sasakura Engineering Co Ltd | Treatment device and treatment method for waste liquid comprising basic substance having volatility |
| CN101696177A (en) * | 2009-11-02 | 2010-04-21 | 河南心连心化肥有限公司 | Device for processing urea process condensate and method thereof |
| CN203346108U (en) * | 2013-06-25 | 2013-12-18 | 贵州宜化化工有限责任公司 | Urea waste liquid treatment device |
| CN203315766U (en) * | 2013-07-11 | 2013-12-04 | 新疆天运化工有限公司 | Evaporation prilling device for preparing urea |
| CN205294871U (en) * | 2015-11-23 | 2016-06-08 | 河南心连心化肥有限公司 | Large granule urea device waste liquid treatment device |
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Effective date of registration: 20200401 Address after: 453731 Xinxiang Economic Development Zone, Xinxiang City, Henan Province (Xiaoji Town) Co-patentee after: XINJIANG XINLIANXIN ENERGY CHEMICAL Co.,Ltd. Patentee after: Henan Xinlianxin Chemical Industry Group Co.,Ltd. Co-patentee after: Jiujiang Xinlianxin Chemical Fertilizer Co.,Ltd. Address before: 453731 Xinxiang Economic Development Zone, Henan Province (Xiaoji Town) Patentee before: Henan Xinlianxin Chemical Industry Group Co.,Ltd. |
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Address after: 453731 Henan Xinxiang Economic Development Zone (Xiaoji Town) Patentee after: Henan Xinlianxin Chemical Industry Group Co.,Ltd. Patentee after: XINJIANG XINLIANXIN ENERGY CHEMICAL Co.,Ltd. Patentee after: Jiangxi xinlianxin Chemical Industry Co.,Ltd. Address before: 453731 Xinxiang Economic Development Zone, Xinxiang City, Henan Province (Xiaoji Town) Patentee before: Henan Xinlianxin Chemical Industry Group Co.,Ltd. Patentee before: XINJIANG XINLIANXIN ENERGY CHEMICAL Co.,Ltd. Patentee before: Jiujiang Xinlianxin Chemical Fertilizer Co.,Ltd. |