CN111068583A - System cabinet for low-temperature mixing of peroxide and solvent - Google Patents
System cabinet for low-temperature mixing of peroxide and solvent Download PDFInfo
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- CN111068583A CN111068583A CN201911336667.8A CN201911336667A CN111068583A CN 111068583 A CN111068583 A CN 111068583A CN 201911336667 A CN201911336667 A CN 201911336667A CN 111068583 A CN111068583 A CN 111068583A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
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Abstract
The invention provides a system cabinet for low-temperature mixing of peroxide and a solvent, which is characterized in that: the intelligent cabinet temperature adjusting device comprises a cabinet body, the internal wall of cabinet is equipped with the heat preservation, and the outer wall is equipped with the instrument junction box, and the internal at least one mixing unit that is equipped with of cabinet, be equipped with peroxide sample introduction pipeline and solvent sample introduction pipeline in the mixing unit, peroxide sample introduction pipeline and solvent sample introduction pipeline connect static mixer through advancing kind quality control device respectively, and static mixer passes through pneumatic plug valve and connects the mixed material export, and the internal refrigerating plant and the temperature measuring device that still are equipped with of cabinet. The invention has simple structure and can be suitable for static mixing of multi-component substances; the temperature of the cabinet and the flow of the peroxide sample injection pipeline and the solvent sample injection pipeline can be accurately controlled, if materials with more flow paths are mixed, on the basis, simple adjustment is carried out, and the method can be applied by increasing the number of the sample injection pipelines.
Description
Technical Field
The invention relates to a system cabinet for low-temperature mixing of peroxide and a solvent.
Background
Polyethylene is used as an important raw material of plastic films and plastic pipes, and the demand is continuously increasing. At present, the industrial production of low density polyethylene comprises a kettle process and a tubular process. The tubular reactor has simple structure, convenient manufacture and maintenance and can bear higher pressure; the kettle type reactor has complex structure and is difficult to maintain and install. So that the tubular method is generally applied at present. In the tubular method, the mixing ratio, temperature and fluidity of the peroxide and the solvent are often difficult to control, so that the product properties and particle extrusion are influenced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the mixing proportion, temperature and fluidity are difficult to control when the tubular method is adopted to mix the peroxide and the solvent.
In order to solve the above problems, the technical solution of the present invention is to provide a system cabinet for low-temperature mixing of peroxide and solvent, which is characterized in that: the intelligent cabinet temperature adjusting device comprises a cabinet body, the internal wall of cabinet is equipped with the heat preservation, and the outer wall is equipped with the instrument junction box, and the internal at least one mixing unit that is equipped with of cabinet, be equipped with peroxide sample introduction pipeline and solvent sample introduction pipeline in the mixing unit, peroxide sample introduction pipeline and solvent sample introduction pipeline connect static mixer through advancing kind quality control device respectively, and static mixer passes through pneumatic plug valve and connects the mixed material export, and the internal refrigerating plant and the temperature measuring device that still are equipped with of cabinet.
Preferably, the sample injection quality control device comprises a DCS control system and control valves arranged on the peroxide sample injection pipeline and the solvent sample injection pipeline.
Preferably, the control valve comprises a sample introduction manual shutoff ball valve, a sample introduction mass flow meter, a sample introduction micro flow regulating valve, a one-way valve and a pre-mixing manual shutoff ball valve, and the DCS control system remotely controls the sample introduction mass flow meter and the sample introduction micro flow regulating valve.
Preferably, the refrigerating device is a chilled water pipeline arranged in the cabinet body, and a chilled water pipeline water inlet and a chilled water pipeline water outlet are respectively arranged at two ends of the cabinet body.
Preferably, a self-supporting temperature control valve is arranged at the water inlet of the chilled water pipeline and used for adjusting the flow of chilled water to maintain the set temperature in the cabinet.
Preferably, the temperature measuring device is a temperature transmitter and is used for transmitting the temperature of the cabinet body to the DCS control system on site and remotely.
Preferably, the bottom of the cabinet body is provided with a liquid collecting disc and a discharge pipe, and liquid collected by the liquid collecting disc is discharged through the discharge pipe.
Preferably, a finned heat exchanger is arranged in the cabinet body.
Preferably, a purging instrument air pipeline is arranged in the cabinet body.
Compared with the prior art, the invention has the beneficial effects that:
the invention has simple structure and can be suitable for static mixing of multi-component substances; the temperature of the cabinet and the flow of the peroxide sample injection pipeline and the solvent sample injection pipeline can be accurately controlled, if materials with more flow paths are mixed, on the basis, simple adjustment is carried out, and the method can be applied by increasing the number of the sample injection pipelines.
Drawings
FIG. 1 is a flow diagram of a mixing unit;
FIG. 2 is a flow diagram of a system cabinet for cryogenic mixing of peroxide and solvent in accordance with the present invention;
FIG. 3 is a schematic diagram of the external structure of a system cabinet for low-temperature mixing of peroxide and a solvent according to the present invention.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
As shown in figures 1 to 3, the system cabinet for mixing peroxide and solvent at low temperature comprises a cabinet body 1, wherein a heat insulation layer 2 is processed on the inner wall of the cabinet body 1, a 50 mm-thick phenolic plate is adopted as a heat insulation material of the cabinet, an instrument junction box 3 is installed on the outer wall of the cabinet body 1, the instrument junction boxes 3 with different explosion-proof grades and signal types are separately arranged, and the instrument junction box 3 is provided with an inlet and outlet cable gland.
At least one mixing unit 4 is arranged in the cabinet body 1, 4 mixing units 4 are arranged in the embodiment, a plurality of peroxide sample introduction pipelines 5 and solvent sample introduction pipelines 6 are arranged in each mixing unit 4, each peroxide sample introduction pipeline 5 and each solvent sample introduction pipeline 6 sequentially pass through a sample introduction manual shutoff ball valve 10, a sample introduction mass flow meter 11, a sample introduction micro flow regulating valve 12, a one-way valve 13 and a mixing front manual shutoff ball valve 14 to be connected with a static mixer 8, and the static mixer 8 reaches a mixed material outlet through a pneumatic plug valve 9.
The normal temperature maintains at 5 +/-1 ℃ in the cabinet body 1, as shown in fig. 2, each mixing unit 4 is equipped with an independent finned heat exchanger 7, the chilled water pipeline 15 is installed in the cabinet body 1, the chilled water pipeline water inlet and the chilled water pipeline water outlet are respectively arranged at two ends of the cabinet body 1, the cooling medium is chilled water, a self-supporting temperature control valve 16 is installed on a chilled water pipeline water inlet pipeline, a temperature sensor of the self-supporting temperature control valve 16 senses the ambient temperature in the cabinet body 1 to drive a valve to act, so that the actual temperature in the cabinet is ensured to meet the set value requirement by adjusting the chilled water flow, and a high-temperature alarm is set when the temperature of the cabinet body 1 reaches 10 ℃. The four mixing units 4 are jointly provided with 2 temperature transmitters 17 for remotely transmitting temperature signals to a DCS control system for on-site and remote transmission of the temperature in a display cabinet, and the installation positions of the temperature transmitters 17 need to be convenient to observe and maintain.
The rack sets up the toughened glass observation window of appropriate area for observe the on-the-spot indicated value of advancing kind mass flowmeter 11, and every mixing unit 4 is single-open door, sets up double-deck toughened glass.
The rack adopts non-gas tightness design, and every rack sets up the shutter alone. Each cabinet is provided with a purging instrument air pipeline 20, four branches of the purging instrument air pipeline 20 are respectively used for replacing and purging each mixing unit 4, a manual cut-off valve is arranged on the purging instrument air pipeline 20, and the valve is arranged on the outer side of the cabinet and used for cutting off and opening a purging air source.
A drip pan 18 is provided at the bottom of the cabinet and drains collected liquid through a drain pipe 19. The discharge of the discharge pipe 19 is arranged at a position below the peroxide inlet side of the cabinet. The whole system is integrated on a discharge pipe 19 for discharge, and the joint of a liquid discharge header pipe collected by a collecting pool in the cabinet is a flange valve.
After the cabinet receives the material proportioning demand of the DCS control system, the DCS control system remotely controls the sample injection micro flow regulating valve 12 and the sample injection mass flow meter 11 to be switched on and off so as to control the feeding ratio of peroxide and solvent, the peroxide and the solvent enter the static mixer 8 to be mixed in a state that the cabinet is kept at a low temperature, and after the mixing, the rear-end pneumatic plug valve 9 is remotely opened to convey the mixed material to the next working section.
Claims (9)
1. A system cabinet for low temperature mixing of peroxide and solvent, characterized in that: the improved cabinet comprises a cabinet body (1), the inner wall of the cabinet body (1) is provided with a heat preservation layer (2), the outer wall is provided with an instrument junction box (3), at least one mixing unit (4) is arranged in the cabinet body (1), a peroxide sample introduction pipeline (5) and a solvent sample introduction pipeline (6) are arranged in the mixing unit (4), the peroxide sample introduction pipeline (5) and the solvent sample introduction pipeline (6) are respectively connected with a static mixer (8) through a sample introduction quality control device, the static mixer (8) is connected with a mixed material outlet through a pneumatic plug valve (9), and a refrigerating device and a temperature measuring device are further arranged in the cabinet body (1).
2. The system cabinet for cryogenic mixing of peroxide and solvent according to claim 1, wherein: the sample injection quality control device comprises a DCS control system and control valves arranged on a peroxide sample injection pipeline (5) and a solvent sample injection pipeline (6).
3. The system cabinet for cryogenic mixing of peroxide and solvent according to claim 2, wherein: the control valve comprises a manual sample-feeding shutoff ball valve (10), a sample-feeding mass flow meter (11), a sample-feeding micro flow regulating valve (12), a one-way valve (13) and a manual shutoff ball valve (14) before mixing, and the DCS control system remotely controls the sample-feeding mass flow meter (11) and the sample-feeding micro flow regulating valve (12).
4. The system cabinet for cryogenic mixing of peroxide and solvent according to claim 1, wherein: the refrigerating device is a refrigerating water pipeline (15) arranged in the cabinet body (1), and a refrigerating water pipeline water inlet and a refrigerating water pipeline water outlet are respectively arranged at two ends of the cabinet body (1).
5. The system cabinet for cryogenic mixing of peroxide and solvent according to claim 1, wherein: the water inlet of the freezing water pipeline is provided with a self-supporting temperature control valve (16) which is used for adjusting the flow of the freezing water to maintain the set temperature in the cabinet.
6. The system cabinet for cryogenic mixing of peroxide and solvent according to claim 1, wherein: the temperature measuring device is a temperature transmitter (17) and is used for transmitting the temperature of the cabinet body (1) to the DCS control system on site and remotely.
7. The system cabinet for cryogenic mixing of peroxide and solvent according to claim 1, wherein: the bottom of the cabinet body (1) is provided with a liquid collecting disc (18) and a discharge pipe (19), and liquid collected by the liquid collecting disc (18) is discharged through the discharge pipe (19).
8. The system cabinet for cryogenic mixing of peroxide and solvent according to claim 1, wherein: a finned heat exchanger (7) is arranged in the cabinet body (1).
9. The system cabinet for cryogenic mixing of peroxide and solvent according to claim 1, wherein: an instrument air pipeline (20) is arranged in the cabinet body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911336667.8A CN111068583A (en) | 2019-12-23 | 2019-12-23 | System cabinet for low-temperature mixing of peroxide and solvent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911336667.8A CN111068583A (en) | 2019-12-23 | 2019-12-23 | System cabinet for low-temperature mixing of peroxide and solvent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111068583A true CN111068583A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911336667.8A Withdrawn CN111068583A (en) | 2019-12-23 | 2019-12-23 | System cabinet for low-temperature mixing of peroxide and solvent |
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| Country | Link |
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| CN (1) | CN111068583A (en) |
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| EP2393587A1 (en) * | 2009-02-05 | 2011-12-14 | Dow Global Technologies Inc. | Low density polyethylene (ldpe) tubular reactor for peroxide initiator injection |
| CN103203803A (en) * | 2013-04-23 | 2013-07-17 | 上海三瑞高分子材料有限公司 | Multi-liquid continuous mixing device |
| CN204502824U (en) * | 2015-03-25 | 2015-07-29 | 南通江天化学股份有限公司 | The online blending device of formalin |
| CN205095745U (en) * | 2015-08-17 | 2016-03-23 | 神华集团有限责任公司 | Initiating agent filling pipe system and polyethylene reaction system |
| CN106582451A (en) * | 2016-12-30 | 2017-04-26 | 哈尔滨天顺化工科技开发有限公司 | Continuous feeding system for polymerization of carbon fiber precursors |
| CN106861552A (en) * | 2015-12-10 | 2017-06-20 | 刘贝 | Liquid dispensing device |
| CN206863047U (en) * | 2017-05-31 | 2018-01-09 | 爱文思控制系统工程(上海)有限公司 | A kind of online more stream sample switching systems |
| CN110130861A (en) * | 2019-06-17 | 2019-08-16 | 浙江金龙自控设备有限公司 | A kind of mixed liquid injection allocation apparatus of low sheraing individual well |
| CN110280115A (en) * | 2019-07-01 | 2019-09-27 | 上海兴能环保科技有限公司 | A kind of SNCR high efficiency smart spraying system |
-
2019
- 2019-12-23 CN CN201911336667.8A patent/CN111068583A/en not_active Withdrawn
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040010098A1 (en) * | 2000-12-05 | 2004-01-15 | Georg Groos | Device for feeding reactor initiators |
| CN1479752A (en) * | 2000-12-05 | 2004-03-03 | ��������ϩ�����������˾ | Device for feeding reactor initiator |
| EP2393587A1 (en) * | 2009-02-05 | 2011-12-14 | Dow Global Technologies Inc. | Low density polyethylene (ldpe) tubular reactor for peroxide initiator injection |
| CN102369055A (en) * | 2009-02-05 | 2012-03-07 | 陶氏环球技术有限责任公司 | Low density polyethylene (ldpe) tubular reactor for peroxide initiator injection |
| CN103203803A (en) * | 2013-04-23 | 2013-07-17 | 上海三瑞高分子材料有限公司 | Multi-liquid continuous mixing device |
| CN204502824U (en) * | 2015-03-25 | 2015-07-29 | 南通江天化学股份有限公司 | The online blending device of formalin |
| CN205095745U (en) * | 2015-08-17 | 2016-03-23 | 神华集团有限责任公司 | Initiating agent filling pipe system and polyethylene reaction system |
| CN106861552A (en) * | 2015-12-10 | 2017-06-20 | 刘贝 | Liquid dispensing device |
| CN106582451A (en) * | 2016-12-30 | 2017-04-26 | 哈尔滨天顺化工科技开发有限公司 | Continuous feeding system for polymerization of carbon fiber precursors |
| CN206863047U (en) * | 2017-05-31 | 2018-01-09 | 爱文思控制系统工程(上海)有限公司 | A kind of online more stream sample switching systems |
| CN110130861A (en) * | 2019-06-17 | 2019-08-16 | 浙江金龙自控设备有限公司 | A kind of mixed liquid injection allocation apparatus of low sheraing individual well |
| CN110280115A (en) * | 2019-07-01 | 2019-09-27 | 上海兴能环保科技有限公司 | A kind of SNCR high efficiency smart spraying system |
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Application publication date: 20200428 |
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| WW01 | Invention patent application withdrawn after publication |