CN114308918A - Scrubbing method of dual-unit production system of hexogen production line - Google Patents
Scrubbing method of dual-unit production system of hexogen production line Download PDFInfo
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- CN114308918A CN114308918A CN202111619745.2A CN202111619745A CN114308918A CN 114308918 A CN114308918 A CN 114308918A CN 202111619745 A CN202111619745 A CN 202111619745A CN 114308918 A CN114308918 A CN 114308918A
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- machine
- acid
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- scrubbing
- circulation
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 238000005201 scrubbing Methods 0.000 title claims abstract description 35
- XTFIVUDBNACUBN-UHFFFAOYSA-N 1,3,5-trinitro-1,3,5-triazinane Chemical compound [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)C1 XTFIVUDBNACUBN-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 239000002253 acid Substances 0.000 claims abstract description 66
- 230000001680 brushing effect Effects 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 22
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 230000001546 nitrifying effect Effects 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 description 8
- 239000003814 drug Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 230000000802 nitrating effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Cleaning In General (AREA)
Abstract
A method for brushing the two-unit production system of hexogen production line features that the nitrifying machine, crystallizing machine, acidic filter, acid water system and vacuum system of two units are brushed simultaneously by more than 98% nitric acid. The method of the invention not only reduces the labor intensity of staff and the operation risk coefficient, but also fills the technical blank of the two-unit scrubbing of the domestic hexogen production line.
Description
Technical Field
The invention belongs to the field of chemical industry, and particularly relates to a scrubbing method of a dual-unit production system of a hexogen production line.
Background
In the production process of hexogen, a layer of 'paraffin-coated substances' is adhered to the inner walls, the shafts, the top of an inner cover and the like of a nitrating machine and a crystallizing machine, the components of the 'paraffin-coated substances' are scale formed by urotropine, hexogen and a plurality of byproducts, the 'paraffin-coated substances' are accumulated and increased, firstly, local high temperature in the nitrating machine is easily caused, secondly, after the stirring blades of the crystallizing machine are coated with the wax, the thrust of the stirring blades is weakened, the circulation state in the machine is damaged, and the particle size distribution of a final product is seriously influenced; thirdly, the inner walls of the pipelines of the acid water system and the vacuum system can be adhered with a layer of medicine scale, the layer of the adhered medicine scale is gradually thickened along with the accumulation of production time, and even the pipeline is completely blocked by the medicine scale, so that the production is difficult to normally run. Therefore, the production line can regularly brush the nitrator, the crystallizer, the acid filter, the acid water system and the vacuum system, and the normal production of the production line is ensured.
At present, a single-unit brushing process is complete and effective, a ready-made brushing process is not available for double-unit brushing, and a single-unit brushing mode is adopted, namely, one unit is brushed first, and then the other unit is brushed after the brushing is finished. The brushing mode is that pipelines communicated with two units need to be disassembled, reinstalled and isolated; secondly, after one unit is scrubbed, the shared equipment and pipelines need to be purged again, so that sourness in the workshop is large, and operation of workers is not facilitated; thirdly, in the purging process, part of pipelines are blocked by the brushing residual medicine, so that potential safety hazards exist when another unit is brushed by acid again; fourthly, the two units are separately brushed, so that the production line stop time is prolonged, and the annual effective production time is shortened. Therefore, it is a research effort by those skilled in the art to find a method for cleaning a dual-unit production system of a hexogen production line.
Disclosure of Invention
In order to overcome the defects of the cleaning method of the two-unit production system of the hexogen production line in the prior art, the invention provides the cleaning method of the two-unit production system of the hexogen production line, which adopts the technical scheme that:
the double-machine set is an A machine set and a B machine set, all pipelines and equipment of the A machine set and the B machine set are cleaned and blown firstly, the A machine set and the B machine set are brushed on the same day, and the brushing steps are arranged in a unified mode: acid is firstly fed into the machine A, acid is fed into the machine B again, then the machine A and the machine B are subjected to cross scrubbing, a valve is closed at a pipeline communicated with the machine A and the machine B for isolation, water is fed into the machine A and the machine B again for water circulation according to the acid circulation scrubbing step after the acid circulation scrubbing is finished, and after the water circulation is finished and cleaned, the whole scrubbing process is finished. The specific process is as follows:
step 1, brushing preparation;
emptying materials in the equipment, and cleaning and blowing all equipment and pipelines required by brushing; in the purging operation, when the pipeline is purged, the air tightness and the unblocked state of the pipeline need to be confirmed on site, and the pipeline with problems needs to be dredged or fastened in time;
step 2, circularly scrubbing with acid;
acid is fed into the machine A, acid is fed into the machine B, and then the machine A and the machine B are crossed to carry out acid circulation scrubbing;
the acid is circularly scrubbed, and the used acid is nitric acid with the mass percentage concentration of more than 98 percent;
when the unit A is scrubbed in an acid circulation manner, the valves of the unit A and the unit B are adjusted to be opened and closed according to the acid circulation scrubbing step, and when the unit A is scrubbed, the valves of the related unit B are closed; the method comprises the following steps that an acid water adding pipeline of an oxidation crystallizer of a unit A is disconnected, an acid water replenishing pipeline of an acid water head tank is added with a dead pad, an acid water adding pipeline of a crystallization crystallizer of a unit B is disconnected, short sections of acid water regulating valves of the unit A and the unit B are replaced, a neutral temporary pipeline of the unit A is connected, and the fact that the dead pad of the neutral temporary pipeline of the unit B is extracted is confirmed;
when the machine B unit is scrubbed in an acid circulation mode, the valves of the machine A and the machine B unit are adjusted to be opened and closed according to the acid circulation scrubbing step, and when the machine B unit is scrubbed, the valves of the related machine B unit are closed;
step 3, water circulation;
after the acid circulation scrubbing of the A machine set and the B machine set is finished, water is fed into the A machine set and the B machine set according to the step of acid circulation scrubbing, and water circulation is carried out;
step 4, post-treatment;
and recovering acid water adding pipelines of the oxidation crystallization machines of the first machine set and the second machine set after water circulation of the first machine set and the second machine set is finished, removing the neutral temporary brushing pipeline of the first machine set, reloading a dead pad of the neutral temporary brushing pipeline of the second machine set, and timely transferring waste acid generated by brushing to the next procedure to finish the brushing process.
The invention provides a method for scrubbing a two-unit production system of a hexogen production line, which aims to solve the problem caused by the two-unit scrubbing of the hexogen production line, and the method is used for simultaneously scrubbing a nitrator, a crystallizer, an acid filter, an acid water system and a vacuum system of the two units by using more than 98 percent of nitric acid. Not only reduces the labor intensity of staff and the operation risk coefficient, but also fills the technical blank of the double-unit scrubbing of the domestic hexogen production line.
Detailed Description
Example 1: the invention discloses a scrubbing method of a dual-unit production system of a hexogen production line, which comprises the following specific processes:
step 1, brushing preparation;
emptying materials in the equipment, and cleaning and blowing all equipment and pipelines required by brushing;
step 2, circularly scrubbing with acid;
acid is fed into the machine A, acid is fed into the machine B, and then the machine A and the machine B are crossed to carry out acid circulation scrubbing;
the acid is circularly scrubbed, and the used acid is nitric acid with the mass percentage concentration of more than 98 percent;
when the unit A is scrubbed in an acid circulation manner, the valves of the unit A and the unit B are adjusted to be opened and closed according to the acid circulation scrubbing step, and when the unit A is scrubbed, the valves of the related unit B are closed;
when the machine B unit is scrubbed in an acid circulation mode, the valves of the machine A and the machine B unit are adjusted to be opened and closed according to the acid circulation scrubbing step, and when the machine B unit is scrubbed, the valves of the related machine B unit are closed; in this embodiment, the acid circulation brushing performed by the first and second machine sets in a crossed manner is realized by the following method:
a. feeding acid into the first unit;
b. feeding acid into the machine B;
c. brushing acid pumping pipelines of the first machine set and the second machine set;
d. brushing a neutral pipeline of the first unit;
e. brushing the acid water pipeline of the second scrubber;
f. brushing the neutral pipeline of the second unit;
g. an acid water pipeline of the brushing machine A;
after the operation g in the step 2 is finished, finishing the acid circulation brushing of the A machine set and the B machine set;
step 3, water circulation;
after the acid circulation scrubbing of the A machine set and the B machine set is finished, water is fed into the A machine set and the B machine set according to the step of acid circulation scrubbing, and water circulation is carried out;
step 4, post-treatment;
and recovering acid water adding pipelines of the oxidation crystallization machines of the first machine set and the second machine set after water circulation of the first machine set and the second machine set is finished, removing the neutral temporary brushing pipeline of the first machine set, reloading a dead pad of the neutral temporary brushing pipeline of the second machine set, and timely transferring waste acid generated by brushing to the next procedure to finish the brushing process.
Claims (3)
1. A scrubbing method of a double-unit production system of a hexogen production line is characterized by comprising the following specific processes:
step 1, brushing preparation;
emptying materials in the equipment, and cleaning and blowing all equipment and pipelines required by brushing;
step 2, circularly scrubbing with acid;
acid is fed into the machine A, acid is fed into the machine B, and the machine A and the machine B are subjected to acid circulation scrubbing;
the acid is circularly scrubbed, and the used acid is nitric acid with the mass percentage concentration of more than 98 percent;
when the unit A is scrubbed in an acid circulation manner, the valves of the unit A and the unit B are adjusted to be opened and closed according to the acid circulation scrubbing step, and when the unit A is scrubbed, the valves of the related unit B are closed;
when the machine B unit is scrubbed in an acid circulation mode, the valves of the machine A and the machine B unit are adjusted to be opened and closed according to the acid circulation scrubbing step, and when the machine B unit is scrubbed, the valves of the related machine B unit are closed;
step 3, water circulation;
after the acid circulation scrubbing of the A machine set and the B machine set is finished, water is fed into the A machine set and the B machine set according to the step of acid circulation scrubbing, and water circulation is carried out;
step 4, post-treatment;
and after the water circulation of the first machine set and the second machine set is finished, transferring waste acid generated by scrubbing to the next procedure in time, and finishing the scrubbing process.
2. The method for brushing the dual-unit production system of the hexogen production line according to claim 1, wherein the step of performing acid circulation brushing on the A and B units is a step of performing acid circulation brushing by intersecting the A and B units.
3. The method for scrubbing the dual-unit production system of the hexogen production line as claimed in claim 1 or 2, wherein the purging operation is performed by confirming the airtightness and the unblocked state of the pipeline on site when the pipeline is purged, and timely purging or fastening the pipeline with problems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111619745.2A CN114308918A (en) | 2021-12-27 | 2021-12-27 | Scrubbing method of dual-unit production system of hexogen production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111619745.2A CN114308918A (en) | 2021-12-27 | 2021-12-27 | Scrubbing method of dual-unit production system of hexogen production line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114308918A true CN114308918A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111619745.2A Pending CN114308918A (en) | 2021-12-27 | 2021-12-27 | Scrubbing method of dual-unit production system of hexogen production line |
Country Status (1)
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| CN (1) | CN114308918A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08281144A (en) * | 1995-04-10 | 1996-10-29 | Toyo Shiyoushiya:Kk | Simple cleaning system for water tubular path of molding die |
| JP2002349798A (en) * | 2001-05-23 | 2002-12-04 | Soken Chem & Eng Co Ltd | Automatic switching and supplying system for plural fluid, method for using the same system, and method for cleaning the same system |
| US20050183744A1 (en) * | 2004-02-23 | 2005-08-25 | Staub Richard K. | Methods for treating CIP equipment and equipment for treating CIP equipment |
| JP2007130613A (en) * | 2005-11-14 | 2007-05-31 | Nax Co Ltd | Cleaning apparatus |
| CN101109088A (en) * | 2007-08-14 | 2008-01-23 | 邯郸钢铁股份有限公司 | Technique for cleaning acid dirty of acid reactivating machine group inner loop type pipeline |
| US20140158164A1 (en) * | 2012-12-06 | 2014-06-12 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Cleaning machine, and cleaning method and cleaning system thereof |
| CN208743179U (en) * | 2018-08-01 | 2019-04-16 | 北京科诚中业汽车零部件制造有限公司 | A kind of double-station valve rocker high-pressure cleaning device |
| CN111322904A (en) * | 2019-12-30 | 2020-06-23 | 甘肃银光化学工业集团有限公司 | Optimization method for heat exchanger pickling process |
| CN210966199U (en) * | 2019-11-23 | 2020-07-10 | 河南井田油料有限公司 | Intelligent circulating cleaning equipment for cooling system |
| CN111936454A (en) * | 2018-01-18 | 2020-11-13 | 诺瓦化学品(国际)股份有限公司 | ODH complex with in-line mixer unit and feed line purge |
-
2021
- 2021-12-27 CN CN202111619745.2A patent/CN114308918A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08281144A (en) * | 1995-04-10 | 1996-10-29 | Toyo Shiyoushiya:Kk | Simple cleaning system for water tubular path of molding die |
| JP2002349798A (en) * | 2001-05-23 | 2002-12-04 | Soken Chem & Eng Co Ltd | Automatic switching and supplying system for plural fluid, method for using the same system, and method for cleaning the same system |
| US20050183744A1 (en) * | 2004-02-23 | 2005-08-25 | Staub Richard K. | Methods for treating CIP equipment and equipment for treating CIP equipment |
| JP2007130613A (en) * | 2005-11-14 | 2007-05-31 | Nax Co Ltd | Cleaning apparatus |
| CN101109088A (en) * | 2007-08-14 | 2008-01-23 | 邯郸钢铁股份有限公司 | Technique for cleaning acid dirty of acid reactivating machine group inner loop type pipeline |
| US20140158164A1 (en) * | 2012-12-06 | 2014-06-12 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Cleaning machine, and cleaning method and cleaning system thereof |
| CN111936454A (en) * | 2018-01-18 | 2020-11-13 | 诺瓦化学品(国际)股份有限公司 | ODH complex with in-line mixer unit and feed line purge |
| CN208743179U (en) * | 2018-08-01 | 2019-04-16 | 北京科诚中业汽车零部件制造有限公司 | A kind of double-station valve rocker high-pressure cleaning device |
| CN210966199U (en) * | 2019-11-23 | 2020-07-10 | 河南井田油料有限公司 | Intelligent circulating cleaning equipment for cooling system |
| CN111322904A (en) * | 2019-12-30 | 2020-06-23 | 甘肃银光化学工业集团有限公司 | Optimization method for heat exchanger pickling process |
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Application publication date: 20220412 |