CN108212995A - The online sweep-out method of tubular type reaction fouling in a kind of production of ammonium phosphate - Google Patents
The online sweep-out method of tubular type reaction fouling in a kind of production of ammonium phosphate Download PDFInfo
- Publication number
- CN108212995A CN108212995A CN201711397750.7A CN201711397750A CN108212995A CN 108212995 A CN108212995 A CN 108212995A CN 201711397750 A CN201711397750 A CN 201711397750A CN 108212995 A CN108212995 A CN 108212995A
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- CN
- China
- Prior art keywords
- tubular reactor
- cleaning solution
- fouling
- tubular
- storage tank
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- 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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/28—Ammonium phosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The present invention is a kind of online sweep-out method of tubular type reaction fouling in production of ammonium phosphate, including：(1) cleaning solution is prepared, cleaning solution used is made of 60%~98% sulfuric acid of mass fraction and water mixing, and the mass ratio of sulfuric acid and water is 1: 25~30；(2) outlet of cleaning solution storage tank is connect with the import of tubular reactor delivery pump；(3) when fouling occurs in tubular reactor, it closes tubular reactor and matches acid tank slot bottom valve, then the control valve of cleaning solution storage tank is opened, cleaning solution is pumped by tubular reactor conveying in tubular reactor, it is heated again by the ammonia scavenging conduit steam of tubular reactor, accelerates the removal of deposit to tubular reactor and its related pipeline.Advantageous effect：Without dismantling tubular reactor, realize that on-line operation removes fouling, small investment, device configuration are simple；Scale removal is fairly obvious, improves device operation efficiency, so as to improve the performance of enterprises.
Description
Technical field
The present invention relates to production of phosphate fertilizer device, furthermore, it is understood that being related to production of ammonium phosphate, in particular to production of ammonium phosphate
The sweep-out method of middle tubular reactor and its related pipeline scaling.
Background technology
The granulation production of current most of Diammonium phosphate (DAP) is using single tube or two-tube reaction prilling, and the technique is with its structure
Simply, it is swift in response, many advantages, such as heat utilization efficiency is high is widely used in production of ammonium phosphate.In the production of diammonium phosphate fertilizer
Middle generally use " Traditional Method " or the production of " neutralize slip concentration " method.Due to containing a large amount of Ca, Mg, Al, SiO in rock phosphate in powder2
Etc. a large amount of impurity, lead to phosphor ammonium slurry in the N-process of tubular reactor, tubular reactor inner wall have one layer it is harder
Hard fouling influences the normal operation of tubular reactor, even also product quality can be impacted.In order to remove fouling, pass
The way of system is that total system parking dismantles tubular reactor offline, then disassemble paragraph by paragraph, manually carries out percussion removing, it is clear that this
Method time and effort consuming and to tubular reactor cause damage even destroy.Using tubular reactor produced di(2-ethylhexyl)phosphate for a long time
The stable operation of production is restrict always to the cleaning of tubular reactor in the device of ammonium, this is not also solved well to this
The method of problem.
Invention content
The purpose of the present invention, which is that, provides the online of tubular reactor in a kind of production of ammonium phosphate and its related pipeline scaling
Sweep-out method, to solve the problems, such as tubular reactor and its related pipeline scaling.
The technical solution adopted by the present invention is：The online sweep-out method of tubular type reaction fouling in a kind of production of ammonium phosphate, packet
It includes：
(1) cleaning solution is prepared
Cleaning solution used is made of 2 kinds of raw materials of sulfuric acid and water, and the mass fraction and mass ratio of 2 kinds of material liquids are as follows：
60%~98% sulfuric acid
The mass ratio of sulfuric acid and water is 1: 25~30
2 kinds of raw materials are become to cleaning solution after mixing in a reservoir, it is spare；
(2) using the container of dilute sulphuric acid simultaneously as the storage tank of cleaning solution, storage tank sets rinse liquid outlet pipe, rinse liquid outlet pipe
Import with tubular reactor delivery pump is connect, and the entrance that control valve adjusts cleaning solution is installed on rinse liquid outlet pipe；
(3) it when fouling occurs in tubular reactor, closes tubular reactor and is connected with acid tank with tubular reactor conveying pump inlet
Slot bottom valve, then open the control valve on the pipeline that is connected with tubular reactor delivery pump of cleaning solution storage tank, will clean
Liquid is pumped into tubular reactor, then added by the ammonia scavenging conduit steam of tubular reactor by tubular reactor conveying
Heat accelerates the removal of deposit to tubular reactor and its related pipeline.
Preferably：Cleaning solution holds the removal of deposit of tubular reactor and its related pipeline every time in above-mentioned (3) step
The continuous time is 10~20min/ times；Steam used is the middle pressure steam that pressure is 1.9MPa, and heating temperature is 140 DEG C~170
℃。
The container of batch mixing is the storage tank of capacity 4t in above-mentioned (1) step, and per storage tank, the amount of configuration cleaning solution is 3.5t.
The advantageous effect that the present invention obtains is：The cleaning of tubular reactor is carried out using method provided by the invention, is not had to
It dismantles, disassemble tubular reactor, realize that on-line operation removes fouling, small investment, maneuverability, device configuration are simple；Scale removal ten
It is clearly demarcated aobvious, it is different according to matter sour in features of DAP production, it need to only clean 1~3 time daily.Completely eliminate the anti-device fouling of pipe
The drawbacks of influencing production and product quality.Both device operation efficiency is improved, also greatly reduces the labor intensity of worker.It is suitable
For carrying out the enterprise of production of ammonium phosphate using tubular reactor.
Description of the drawings
Fig. 1 is the cleaning process schematic diagram of the method for the present invention；
1 matches acid tank for tubular reactor in figure, and 2 be cleaning solution storage tank, and 3 be fresh water, and 4 be concentrated sulfuric acid pipeline, and 5 be pipe reaction
Device delivery pump, 6 be with acid tank slot bottom valve, 7 be 1# cleaning hydraulic control valve, 8 be 2# cleaning hydraulic control valve, 9 for the concentrated sulfuric acid addition valve,
10 be tubular reactor outlet line, and 11 be tubular reactor.
Specific embodiment
The online sweep-out method of tubular type reaction fouling in a kind of production of ammonium phosphate, including：
(1) cleaning solution is prepared
Cleaning solution used is made of 2 kinds of raw materials of sulfuric acid and water, and the mass fraction and mass ratio of 2 kinds of material liquids are as follows：
60%~98% sulfuric acid
The mass ratio of sulfuric acid and water is 1: 25~30
2 kinds of raw materials are become to cleaning solution after mixing in a reservoir, it is spare；Container is the storage tank of capacity 4t, is often store
The amount of slot configuration cleaning solution is 3.5t.
(2) using the container of dilute sulphuric acid simultaneously as the storage tank of cleaning solution, storage tank sets rinse liquid outlet pipe, and cleaning solution goes out
Mouthful pipe connect with the import of tubular reactor delivery pump, on rinse liquid outlet pipe installation control valve adjusting cleaning solution into
Enter；
(3) it when fouling occurs in tubular reactor, closes tubular reactor and is connected with acid tank with tubular reactor conveying pump inlet
Slot bottom valve, then open the control valve on the pipeline that is connected with tubular reactor delivery pump of cleaning solution storage tank, will clean
Liquid is pumped into tubular reactor, then added by the ammonia scavenging conduit steam of tubular reactor by tubular reactor conveying
Heat accelerates the removal of deposit to tubular reactor and its related pipeline.
Cleaning solution is to each duration of removal of deposit of tubular reactor and its related pipeline in above-mentioned (3) step
10~20min/ times；Steam used is the middle pressure steam that pressure is 1.9MPa, and heating temperature is 140 DEG C~170 DEG C.
When needing to carry out tubular reactor purging cleaning according to tubular reactor service condition, stop tubular reactor spray
Slurry closes tubular reactor and matches acid tank slot bottom valve 6 with what tubular reactor conveying pump inlet was connected with acid tank 1, then opens clear
The 1# that washing lotion storage tank 2 is connected with tubular reactor delivery pump 5 cleans hydraulic control valve 7,2# cleaning hydraulic control valves 8, and cleaning solution is led to
Tubular reactor delivery pump 5 is crossed to be sent into tubular reactor 11, then steaming is passed through by the ammonia scavenging conduit steam pipe of tubular reactor
Vapour carries out heating acceleration to tubular reactor and its related pipeline.
When carrying out cleaning purging cleaning, the steam of penetrating is 1.9MPa, the middle pressure steam that temperature is 200~220 DEG C,
Cleaning solution can be heated to 140 DEG C~170 DEG C, scavenging period is 10~20min/ times, under normal conditions 10 points in cleaning process
Primary cleaning can be completed in clock.
Cleaning in this way can not only rinse out the obstinate fouling of tubular reactor inner wall, while in this cleaning process
In the fouling in tubular reactor pump discharge pipeline has also been subjected to thorough cleaning, be to serve multiple.
Table 1 cleans front and rear Contrast on effect
Data above is when per day inventory, Round trip time.
Throwing amount increases 1m after transformation3Or so/hour, and Round trip time does not decline, and be significantly improved, effect
It is fairly obvious.
Claims (2)
1. the online sweep-out method of tubular type reaction fouling in a kind of production of ammonium phosphate, including：
(1) cleaning solution is prepared
Cleaning solution used is made of 2 kinds of raw materials of sulfuric acid and water, and the mass fraction and mass ratio of 2 kinds of material liquids are as follows：
60%~98% sulfuric acid
The mass ratio of sulfuric acid and water is 1: 25~30
2 kinds of raw materials are become to cleaning solution after mixing in a reservoir, it is spare；
(2) using the container of dilute sulphuric acid simultaneously as the storage tank of cleaning solution, storage tank sets rinse liquid outlet pipe, rinse liquid outlet pipe
Import with tubular reactor delivery pump is connect, and the entrance that control valve adjusts cleaning solution is installed on rinse liquid outlet pipe；
(3) it when fouling occurs in tubular reactor, closes tubular reactor and is connected with acid tank with tubular reactor conveying pump inlet
Slot bottom valve, then open the control valve on the pipeline that is connected with tubular reactor delivery pump of cleaning solution storage tank, will clean
Liquid is pumped into tubular reactor, then added by the ammonia scavenging conduit steam of tubular reactor by tubular reactor conveying
Heat accelerates the removal of deposit to tubular reactor and its related pipeline.
2. the online sweep-out method of tubular type reaction fouling in a kind of production of ammonium phosphate according to claim 1, it is characterized in that：
In above-mentioned (3) step cleaning solution to each duration of removal of deposit of tubular reactor and its related pipeline for 10~
20min/ times；Steam used is the middle pressure steam that pressure is 1.9MPa, and heating temperature is 140 DEG C~170 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711397750.7A CN108212995A (en) | 2017-12-21 | 2017-12-21 | The online sweep-out method of tubular type reaction fouling in a kind of production of ammonium phosphate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711397750.7A CN108212995A (en) | 2017-12-21 | 2017-12-21 | The online sweep-out method of tubular type reaction fouling in a kind of production of ammonium phosphate |
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| CN108212995A true CN108212995A (en) | 2018-06-29 |
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| CN201711397750.7A Pending CN108212995A (en) | 2017-12-21 | 2017-12-21 | The online sweep-out method of tubular type reaction fouling in a kind of production of ammonium phosphate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112974425A (en) * | 2021-03-12 | 2021-06-18 | 武汉钢铁有限公司 | Descaling method and device for steel rolling equipment pipeline |
| CN113751436A (en) * | 2021-08-31 | 2021-12-07 | 甘肃瓮福化工有限责任公司 | Online cleaning method for pipe type reactor scaling in ammonium phosphate production |
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| US20040154641A1 (en) * | 2002-05-17 | 2004-08-12 | P.C.T. Systems, Inc. | Substrate processing apparatus and method |
| CN101928946A (en) * | 2010-08-06 | 2010-12-29 | 瓮福（集团）有限责任公司 | Method for clearing shell side scale of shell and tube heater in monoammonium phosphate production on line |
| CN102633312A (en) * | 2012-04-18 | 2012-08-15 | 瓮福（集团）有限责任公司 | Method for online cleaning of acid tube by using ammonium phosphate wastewater |
| CN103303890A (en) * | 2013-07-04 | 2013-09-18 | 瓮福（集团）有限责任公司 | Online reflux rinsing method for tubular reactor |
| CN103303889A (en) * | 2013-07-03 | 2013-09-18 | 瓮福（集团）有限责任公司 | Online cleaning method for tubular reactors |
-
2017
- 2017-12-21 CN CN201711397750.7A patent/CN108212995A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040154641A1 (en) * | 2002-05-17 | 2004-08-12 | P.C.T. Systems, Inc. | Substrate processing apparatus and method |
| CN101928946A (en) * | 2010-08-06 | 2010-12-29 | 瓮福（集团）有限责任公司 | Method for clearing shell side scale of shell and tube heater in monoammonium phosphate production on line |
| CN102633312A (en) * | 2012-04-18 | 2012-08-15 | 瓮福（集团）有限责任公司 | Method for online cleaning of acid tube by using ammonium phosphate wastewater |
| CN103303889A (en) * | 2013-07-03 | 2013-09-18 | 瓮福（集团）有限责任公司 | Online cleaning method for tubular reactors |
| CN103303890A (en) * | 2013-07-04 | 2013-09-18 | 瓮福（集团）有限责任公司 | Online reflux rinsing method for tubular reactor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112974425A (en) * | 2021-03-12 | 2021-06-18 | 武汉钢铁有限公司 | Descaling method and device for steel rolling equipment pipeline |
| CN113751436A (en) * | 2021-08-31 | 2021-12-07 | 甘肃瓮福化工有限责任公司 | Online cleaning method for pipe type reactor scaling in ammonium phosphate production |
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Application publication date: 20180629 |
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