CN104383790A - Technology for reducing noise and ammonia content generated during discharging process of CO2 stripping process urea device - Google Patents
Technology for reducing noise and ammonia content generated during discharging process of CO2 stripping process urea device Download PDFInfo
- Publication number
- CN104383790A CN104383790A CN201410559006.2A CN201410559006A CN104383790A CN 104383790 A CN104383790 A CN 104383790A CN 201410559006 A CN201410559006 A CN 201410559006A CN 104383790 A CN104383790 A CN 104383790A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- absorption
- ammonia
- spray
- urea
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 47
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000004202 carbamide Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000005516 engineering process Methods 0.000 title claims abstract description 14
- 238000007599 discharging Methods 0.000 title abstract 2
- 238000007664 blowing Methods 0.000 claims abstract description 14
- 239000000428 dust Substances 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 7
- 230000003584 silencer Effects 0.000 claims abstract description 7
- 238000005469 granulation Methods 0.000 claims abstract description 6
- 230000003179 granulation Effects 0.000 claims abstract description 6
- 238000004064 recycling Methods 0.000 claims abstract description 3
- 238000010521 absorption reaction Methods 0.000 claims description 64
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 24
- 239000007921 spray Substances 0.000 claims description 21
- 238000012856 packing Methods 0.000 claims description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 15
- 239000001569 carbon dioxide Substances 0.000 claims description 15
- 125000004122 cyclic group Chemical group 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 9
- 230000008016 vaporization Effects 0.000 claims description 9
- 238000002425 crystallisation Methods 0.000 claims description 6
- 230000008025 crystallization Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a technology for reducing noise and the ammonia content generated during the discharging process of a CO2 stripping process urea device. In the technology, the urea device and a urea granulation tower are adopted; an ammonia gas absorbing device is arranged above the urea granulation tower; the rear part of an emptying valve on an emptying pipeline of the urea device is communicated to the inside of a dust recycling chamber of the urea granulation tower through a stepped pipeline; a gas distribution silencer is mounted at the tail end of the stepped pipeline; the diameter of the stepped pipeline gradually increases; a steam blowing pipeline is communicated to the rear part of the emptying valve on the emptying pipeline; a non-return valve is mounted on the steam blowing pipeline. According to the invention, the structural design is reasonable, and the technological process is simple; moreover, the ammonia gas absorbing device is additionally arranged, so that the operation implementation is easy, and the effects of reducing noise and discharge amount are obvious.
Description
Technical field
The present invention relates to the device and the process that reduce noise and reduce ammonia content, mainly a kind of reduction CO
2the technology of vaporizing extract process urea plant displacement noise and ammonia content.
Background technology
In traditional carbon dioxide stripping process urea plant, there are the following problems: carry out boosting to 8.0MPa with carbon dioxide before 1, driving according to technological requirement system.2, after system feeds intake, the carbon dioxide of boosting in early stage, will discharge system by the atmospheric valve be arranged on synthetic tower outlet conduit, drain valve is 65 meters of eminences, the noise produced during discharge, up to more than 120 decibels, can have influence on circumference 3 kilometer range.3, increase gradually at the later stage ammonia content of discharge, can about 20% be reached, pollute surrounding environment.4, because emptying time and emptying amount are not fixed, difficulty of governance does not have administering method greatly at present.
summary of the inventiontechnical problem to be solved by this invention is to provide a kind of reduction CO
2the technology of vaporizing extract process urea plant displacement noise and ammonia content, its reasonable in design, technological process is simple, the ammonia absorption device newly increased, and implementation and operation is easy, reduces noise and emissions reduction successful.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of reduction CO
2the technology of vaporizing extract process urea plant displacement noise and ammonia content, includes carbon dioxide stripping process urea plant, urea prilling tower, it is characterized in that: above the dust recovery chamber of described urea prilling tower, be provided with ammonia absorption device; Described ammonia absorption device includes outer cylinder body, in outer cylinder body, bottom is provided with upper and lower two-layer packing layer, three layers of spray-absorption system are provided with from the bottom to top in described outer cylinder body, ground floor spray-absorption Operation system setting is above lower packing layer, and shower nozzle upwards sprays, second layer spray-absorption Operation system setting is above upper packing layer, and shower nozzle sprays downwards; Third layer spray-absorption system is located at outer cylinder body inner top, and shower nozzle sprays downwards; Described outer cylinder body inner top is provided with water collection device in the below of third layer spray-absorption system; Also include a circulating slot, cross current is had in circulating slot bottom described outer cylinder body, circulating slot there is outlet pipe be communicated in spray-absorption system, described outlet pipe is provided with cyclic absorption pump, by cyclic absorption pump, the absorbing liquid in circulating slot is returned in spray-absorption system, the outlet pipe of described circulating slot is also provided with the pipeline being communicated to ammonia vessel, pipeline is provided with valve; The exhausting pipeline of described carbon dioxide stripping process urea plant is communicated in the dust recovery chamber of urea prilling tower by a tapered pipeline after atmospheric valve, be provided with distribution of gas silencer at the end of tapered pipeline, described tapered pipeline expands pipe diameter gradually; Described exhausting pipeline is communicated with after atmospheric valve the steam blowing pipeline that a pressure is 2.5 MPa, blow-down pipe is purged, check-valves installed by described steam blowing pipeline.
A kind of reduction CO
2the technology of vaporizing extract process urea plant displacement noise and ammonia content, it is characterized in that: by the framework of the exhausting pipeline in carbon dioxide stripping process urea plant by 65 meters high, the urea prilling tower dust recovery chamber extending to the reinforced concrete structure of 81 meters of eminences is inner, in the process extended, pipe diameter is expanded gradually by tapered pipeline, reduce the gas flow rate in pipeline, at the end installing gas distribution silencer of tapered pipeline, gas flow rate is made to be reduced to below 20m/s, noise drops to less than 80 decibels, outside at the granulation tower of xoncrete structure, noise can be reduced to less than 70 decibels, its coverage can be reduced in circumference 1 km, when the driving emptying of carbon dioxide stripping process urea plant, open ammonia recycling device, ensure that the ejecting liquid on packing layer can meet the needs absorbing middle ammonia of dropping a hint, the shower nozzle of ground floor spray-absorption system sprays upward, identical with airflow direction, to reduce gas phase drag, its Main Function first absorbs entrained solid particle in gas, the shower nozzle of second layer spray-absorption system sprays downwards, and its sprinkler discharge density is higher, and gas ammonia mainly absorbs at this one deck, the shower nozzle of third layer spray-absorption system sprays downwards, and Main Function rinses water collection device, prevents water collection device crystallization, the effect of water collection device is the drop being separated Vapor Entrainment, prevents absorbing liquid from spilling into outside absorption plant, pollutes surrounding environment.When the absorbing liquid in ammonia absorption device outer cylinder body is in circulating slot, by cyclic absorption pump, absorbing liquid is returned spray-absorption system and be sprayed on packing layer, absorb the ammonia in dropping a hint; After being absorbed by packing layer, the ammonia content in dropping a hint can be reduced to less than 1.0%, and spray liquid flow into circulating slot, continues cyclic absorption after being pressurizeed by circulating pump; Along with the carrying out absorbed, absorbing liquid concentration raises gradually, and assimilation effect declines, and after concentration reaches certain requirement, is reclaimed, and continue cyclic absorption after supplementing waste stripping liquid in circulating slot by the pipeline being communicated to ammonia vessel; The problem of Crystallization Plugging is easily caused after extending to prevent exhausting pipeline, after atmospheric valve on the exhausting pipeline at 65 meters of, the jet chimney that pressure is 2.5 MPa is set, blow-down pipe is purged, drop a hint to prevent high pressure and blow back into steam blowing pipeline, check-valves installed by steam blowing pipeline.
Advantage of the present invention is:
Present invention process flow process is simple, reasonable in design, and Be very effective, makes full use of existing apparatus during construction, the ammonia absorption device newly increased, and it is convenient to implement, and processing ease reduces noise and emissions reduction successful.Emptying place noise is reduced to less than 70 decibels by more than 120 decibels, and middle ammonia content of dropping a hint is reduced to 1.0% by 20%, within coverage reduces to 1 km by 3 kms.
Accompanying drawing explanation
Fig. 1 is invention structural representation.
Fig. 2 is the structure chart of ammonia absorption device in the present invention.
Detailed description of the invention
See Fig. 1,2, a kind of reduction CO
2the technology of vaporizing extract process urea plant displacement noise and ammonia content, includes carbon dioxide stripping process urea plant 1, urea prilling tower 2, above the dust recovery chamber 3 of described urea prilling tower 2, be provided with ammonia absorption device 4; Described ammonia absorption device 4 includes outer cylinder body 5, in outer cylinder body 5, bottom is provided with upper and lower two-layer packing layer 6 and 7, three layers of spray-absorption system 8,9,10 are provided with from the bottom to top in described outer cylinder body 5, ground floor spray-absorption system 8 is arranged on the top of lower packing layer, and shower nozzle upwards sprays, second layer spray-absorption system 9 is arranged on the top of packing layer, and shower nozzle sprays downwards; Third layer spray-absorption system 10 is located at outer cylinder body inner top, and shower nozzle sprays downwards; Described outer cylinder body 5 inner top is provided with water collection device 11 in the below of third layer spray-absorption system; Also include a circulating slot 12, water pipe 13 is had to be communicated in circulating slot 12 bottom described outer cylinder body 5, circulating slot 12 there is outlet pipe 14 be communicated in spray-absorption system, described outlet pipe 14 is provided with cyclic absorption pump 15, by cyclic absorption pump 15, the absorbing liquid in circulating slot 12 is returned in spray-absorption system, the outlet pipe 14 of described circulating slot is also provided with the pipeline 17 being communicated to ammonia vessel 16, pipeline 17 is provided with valve 18; The exhausting pipeline 19 of described carbon dioxide stripping process urea plant 1 is communicated in the dust recovery chamber 3 of urea prilling tower 2 by a tapered pipeline 21 after atmospheric valve 20, be provided with distribution of gas silencer 22 at the end of tapered pipeline 19, described tapered pipeline 22 expands pipe diameter gradually; Described exhausting pipeline 19 is communicated with after atmospheric valve 20 the steam blowing pipeline 23 that a pressure is 2.5 MPa, exhausting pipeline 19 is purged, check-valves 24 installed by described steam blowing pipeline 23.
A kind of reduction CO
2the technology of vaporizing extract process urea plant displacement noise and ammonia content, by the framework of the exhausting pipeline 19 in carbon dioxide stripping process urea plant by 65 meters high, urea prilling tower 2 dust recovery chamber 3 extending to the reinforced concrete structure of 81 meters of eminences is inner, in the process extended, by the pipe diameter of expansion gradually of tapered pipeline 19, reduce the gas flow rate in pipeline, at the end installing gas distribution silencer 22 of tapered pipeline 19, gas flow rate is made to be reduced to below 20m/s, noise drops to less than 80 decibels, outside at the granulation tower 2 of xoncrete structure, noise can be reduced to less than 70 decibels, its coverage can be reduced in circumference 1 km,
When carbon dioxide stripping process urea plant 1 drives emptying, open ammonia absorption device 4, ensure that the ejecting liquid on packing layer can meet the needs absorbing middle ammonia of dropping a hint, the shower nozzle of ground floor spray-absorption system 8 sprays upward, identical with airflow direction, to reduce gas phase drag, its Main Function first absorbs entrained solid particle in gas; The shower nozzle of second layer spray-absorption system 9 sprays downwards, and its sprinkler discharge density is higher, and gas ammonia mainly absorbs at this one deck; The shower nozzle of third layer spray-absorption system 10 sprays downwards, and Main Function rinses water collection device, prevents water collection device crystallization; The effect of water collection device 11 is the drops being separated Vapor Entrainment, prevents absorbing liquid from spilling into outside absorption plant, pollutes surrounding environment.When the absorbing liquid in ammonia absorption device outer cylinder body is in circulating slot, by cyclic absorption pump 15, absorbing liquid is returned spray-absorption system and be sprayed on packing layer, absorb the ammonia in dropping a hint; After being absorbed by packing layer, the ammonia content in dropping a hint can be reduced to less than 1.0%, and spray liquid flow into circulating slot, continues cyclic absorption after being pressurizeed by circulating pump; Along with the carrying out absorbed, absorbing liquid concentration raises gradually, and assimilation effect declines, and after concentration reaches certain requirement, is reclaimed by the pipeline 17 being communicated to ammonia vessel 16, and continues cyclic absorption after supplementing waste stripping liquid in circulating slot; The problem of Crystallization Plugging is easily caused after extending to prevent exhausting pipeline 19, the jet chimney 23 that pressure is 2.5 MPa is set after the atmospheric valve on the exhausting pipeline at 65 meters of, blow-down pipe is purged, drop a hint to prevent high pressure and blow back into steam blowing pipeline, steam blowing pipeline is installed check-valves 24.
Claims (2)
1. reduce CO
2the technology of vaporizing extract process urea plant displacement noise and ammonia content, includes carbon dioxide stripping process urea plant, urea prilling tower, it is characterized in that: above the dust recovery chamber of described urea prilling tower, be provided with ammonia absorption device; Described ammonia absorption device includes outer cylinder body, in outer cylinder body, bottom is provided with upper and lower two-layer packing layer, three layers of spray-absorption system are provided with from the bottom to top in described outer cylinder body, ground floor spray-absorption Operation system setting is above lower packing layer, and shower nozzle upwards sprays, second layer spray-absorption Operation system setting is above upper packing layer, and shower nozzle sprays downwards; Third layer spray-absorption system is located at outer cylinder body inner top, and shower nozzle sprays downwards; Described outer cylinder body inner top is provided with water collection device in the below of third layer spray-absorption system; Also include a circulating slot, cross current is had in circulating slot bottom described outer cylinder body, circulating slot there is outlet pipe be communicated in spray-absorption system, described outlet pipe is provided with cyclic absorption pump, by cyclic absorption pump, the absorbing liquid in circulating slot is returned in spray-absorption system, the outlet pipe of described circulating slot is also provided with the pipeline being communicated to ammonia vessel, pipeline is provided with valve; The exhausting pipeline of described carbon dioxide stripping process urea plant is communicated in the dust recovery chamber of urea prilling tower by a tapered pipeline after atmospheric valve, be provided with distribution of gas silencer at the end of tapered pipeline, described tapered pipeline expands pipe diameter gradually; Described exhausting pipeline is communicated with after atmospheric valve the steam blowing pipeline that a pressure is 2.5 MPa, exhausting pipeline is purged, check-valves installed by described steam blowing pipeline.
2. one kind is reduced CO
2the technology of vaporizing extract process urea plant displacement noise and ammonia content, it is characterized in that: by the framework of the exhausting pipeline in carbon dioxide stripping process urea plant by 65 meters high, the urea prilling tower dust recovery chamber extending to the reinforced concrete structure of 81 meters of eminences is inner, in the process extended, by expanding pipe diameter gradually, reduce the gas flow rate in pipeline, at the end installing gas distribution silencer of tapered pipeline, gas flow rate is made to be reduced to below 20m/s, noise drops to less than 80 decibels, outside at the granulation tower of xoncrete structure, noise can be reduced to less than 70 decibels, its coverage can be reduced in circumference 1 km, when the driving emptying of carbon dioxide stripping process urea plant, open ammonia recycling device, ensure that the ejecting liquid on packing layer can meet the needs absorbing middle ammonia of dropping a hint, the shower nozzle of ground floor spray-absorption system sprays upward, identical with airflow direction, to reduce gas phase drag, its Main Function first absorbs entrained solid particle in gas, the shower nozzle of second layer spray-absorption system sprays downwards, and its sprinkler discharge density is higher, and gas ammonia mainly absorbs at this one deck, the shower nozzle of third layer spray-absorption system sprays downwards, and Main Function rinses water collection device, prevents water collection device crystallization, the effect of water collection device is the drop being separated Vapor Entrainment, prevents absorbing liquid from spilling into outside absorption plant, pollutes surrounding environment, when the absorbing liquid of ammonia absorption device is in circulating slot, by cyclic absorption pump, absorbing liquid is returned spray-absorption system and be sprayed on packing layer, absorb the ammonia in dropping a hint, after being absorbed by packing layer, the ammonia content in dropping a hint can be reduced to less than 1.0%, and spray liquid flow into circulating slot, continues cyclic absorption after being pressurizeed by circulating pump, along with the carrying out absorbed, absorbing liquid concentration raises gradually, and assimilation effect declines, and after concentration reaches certain requirement, is reclaimed, and continue cyclic absorption after supplementing waste stripping liquid in circulating slot by the pipeline being communicated to ammonia vessel, the problem of Crystallization Plugging is easily caused after extending to prevent exhausting pipeline, after atmospheric valve on the exhausting pipeline at 65 meters of, the jet chimney that pressure is 2.5 MPa is set, blow-down pipe is purged, drop a hint to prevent high pressure and blow back into steam blowing pipeline, check-valves installed by steam blowing pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410559006.2A CN104383790B (en) | 2014-10-20 | 2014-10-20 | Method for reducing noise and ammonia content generated during discharging process of CO2 stripping process urea device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410559006.2A CN104383790B (en) | 2014-10-20 | 2014-10-20 | Method for reducing noise and ammonia content generated during discharging process of CO2 stripping process urea device |
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| Publication Number | Publication Date |
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| CN104383790A true CN104383790A (en) | 2015-03-04 |
| CN104383790B CN104383790B (en) | 2017-01-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105627785A (en) * | 2016-03-29 | 2016-06-01 | 内蒙古乌海化工有限公司 | Method of recycling condensate water of PVC polymeric slurry steam stripping system |
| CN111991994A (en) * | 2020-08-18 | 2020-11-27 | 江苏华昌化工股份有限公司 | Treatment method for volatilizing ammonia gas |
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| CN111991994A (en) * | 2020-08-18 | 2020-11-27 | 江苏华昌化工股份有限公司 | Treatment method for volatilizing ammonia gas |
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| Publication number | Publication date |
|---|---|
| CN104383790B (en) | 2017-01-18 |
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Effective date of registration: 20180418 Address after: 832200 the Xinjiang Uygur Autonomous Region Changji Hui Autonomous Prefecture Manasi County River River Industrial Park Patentee after: Xinjiang Zhong Yuan Wanyuan Chemical Co., Ltd. Address before: 236400, 2, temporary road, Linquan County, Fuyang, Anhui Patentee before: Anhui Jinmei Zhongneng Chemical Co.,Ltd. |