CN109986318A - A kind of super-pressure stream of supercritical carbon dioxide carries dry ice cutter device and method - Google Patents
A kind of super-pressure stream of supercritical carbon dioxide carries dry ice cutter device and method Download PDFInfo
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- CN109986318A CN109986318A CN201711498464.XA CN201711498464A CN109986318A CN 109986318 A CN109986318 A CN 109986318A CN 201711498464 A CN201711498464 A CN 201711498464A CN 109986318 A CN109986318 A CN 109986318A
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- carbon dioxide
- dry ice
- pressure
- supercritical carbon
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 225
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 79
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 79
- 235000011089 carbon dioxide Nutrition 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 56
- 238000011084 recovery Methods 0.000 claims abstract description 16
- 238000005422 blasting Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 24
- 238000002347 injection Methods 0.000 claims description 17
- 239000007924 injection Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 5
- 238000004887 air purification Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000001351 cycling effect Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 2
- 230000008030 elimination Effects 0.000 abstract description 8
- 238000003379 elimination reaction Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000010814 metallic waste Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 229960004424 carbon dioxide Drugs 0.000 description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910002090 carbon oxide Inorganic materials 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P17/00—Metal-working operations, not covered by a single other subclass or another group in this subclass
- B23P17/02—Single metal-working processes; Machines or apparatus therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to elimination of nuclear facilities technical fields, and in particular to a kind of method that super-pressure stream of supercritical carbon dioxide carries dry ice cutting.The present invention includes the following steps: step 1, supercritical carbon dioxide preparation；Step 2, super-pressure stream of supercritical carbon dioxide carry dry ice blasting；Step 3, carbon dioxide recovery.The present invention can be realized the Cutting and Dismantling of the metal waste to elimination of nuclear facilities scene, improve cutting efficiency, reduce second-order activity Waste disposal amount, protection staff, the public and Environmental security.
Description
Technical field
The invention belongs to elimination of nuclear facilities technical fields, and in particular to a kind of super-pressure stream of supercritical carbon dioxide load dry ice
The device and method of cutting.
Background technique
During elimination of nuclear facilities field conduct, the either dismounting of equipment or the disintegration of dismounting items is intended to relate to
And arrive radioactivity cutting operation.For example, during nuclear power plant is retired, the Cutting and Dismantling of reactor pressure vessel, primary Ioops system
The Cutting and Dismantling etc. of system main pipeline.Currently, common cutting mode is broadly divided into cold cut and cuts and two kinds of thermal cutting.Wherein, cold cut
Cutting technology mainly includes diamond rope saw, circular saw, high pressure jer cutting etc.；Thermal cutting technology mainly includes underwater plasma
Cutting, oxy-acetylene cutter cutting etc..But the mechanical cold cutting mode cutting efficiency such as diamond rope saw, circular saw is low, consumptive material
Using more；High pressure jer cutting, underwater plasma cutting can generate a large amount of secondary wastewater；Oxy-acetylene cutter cutting can produce
Raw a large amount of radioaerosol.At retired scene, secondary amount of waste increases, and will result directly in the increase of retired funds.Cause
This, elimination of nuclear facilities scene needs the cutting mode that a kind of cutting efficiency is high, secondary waste yield is few.
Currently, at home and abroad supercritical carbon dioxide fluidics is applied in oil exploitation extensively.Overcritical two
Carbonoxide is the CO 2 fluid that pressure and temperature is above its critical value (Pc=7.39MPa, Tc=31.06 DEG C), close
Spend the density close to liquid carbon dioxide；Its viscosity is suitable with gaseous carbon dioxide；Its diffusion coefficient is liquid carbon dioxide
100 times, close to gaseous state.With the raising of supercritical carbon dioxide pressure, property is closer to liquid carbon dioxide.
China University Of Petroleum Beijing studies have shown that be in hardness when the pressure of supercritical carbon dioxide jet stream is 30MPa
Depth of cut on the marble of 3Mos reaches 6mm；When jet pressure is 50MPa, depth of cut is up to 11mm.In addition, in China
The abrasive water jet Flow Technique used when nuclear power unit is retired can cut 100mm thickness when water jet pressure is 380MPa
Stainless steel (hardness is 4Mos~5Mos)；Meanwhile finding under study for action, jet stream cutting mainly relies on the percussion of jet stream,
The namely impact kinetic energy that is converted to of jet pressure, addition abrasive material mainly increases cutting speed, improves cutting efficiency in jet stream
's.
Summary of the invention
Present invention solves the technical problem that: the present invention provides a kind of super-pressure stream of supercritical carbon dioxide and carries dry ice cutting
Device and method can be realized the Cutting and Dismantling of the metal waste to elimination of nuclear facilities scene, improve cutting efficiency, reduce secondary
Radioactive-waste disposal amount, protection staff, the public and Environmental security.
The technical solution adopted by the present invention:
A kind of cutter device of super-pressure stream of supercritical carbon dioxide load dry ice, including industrial gas cylinder, make-up pump, storage tank,
Dry ice pelletizer, dry ice crusher, vibrating screen, funnel, booster pump, heater, negative-pressure guide cover spray cutter device, dry
Device, recovery pump, two-stage filter, Cutting and Dismantling part；Industrial gas cylinder connect by make-up pump with storage tank, storage tank connection and meanwhile with do
Ice pelletizer is connected with booster pump, and dry ice pelletizer is connect with dry ice crusher, and booster pump is connect with heater；It is broken from dry ice
The dry ice particles that machine is produced drop into funnel, and vibrating screen is set on funnel, and funnel is connect with injection cutter device；By pressurization
Pump, heater super-pressure supercritical carbon dioxide with injection cutter device connect, spray cutter device one end be connected with cutting
Disintegration part, periphery are equipped with negative-pressure guide cover, and the carbon dioxide gas that negative-pressure guide cover is collected into passes through drier, recovery pump, two
Grade filter is connected to storage tank.
A kind of method that super-pressure stream of supercritical carbon dioxide carries dry ice cutting, includes the following steps:
Step 1, supercritical carbon dioxide preparation；Step 2, super-pressure stream of supercritical carbon dioxide carry dry ice blasting；Step
3, carbon dioxide recovery.
The step 1 includes the following steps:
Step 1.1 concentrates on the liquid carbon dioxide in industrial gas cylinder in storage tank by make-up pump；
Step 1.2, electric heater heat liquid carbon dioxide, its temperature is made to be increased to 35 DEG C；
Step 1.3, booster pump are pressurized liquid carbon dioxide, its pressure is made to can achieve 100MPa~300MPa；
Pressure sensor and temperature sensor is arranged in step 1.4 on booster pump outlet pipeline, when its pressure and temperature is equal
When more than its critical value, the rear end valve on booster pump is opened, generates super-pressure supercritical carbon dioxide.
In the step 1.1, pressure of storage tank control in 8.0MPa, tank temperature be room temperature, and install cooling device and
Emergency and safeguard measure, to ensure testing crew and testing equipment safety；Storage tank is equipped with pressure sensor and temperature sensor,
For the pressure and temperature of CO 2 fluid in real-time measurement tank.
The step 2 includes the following steps:
Storage tank is connected in dry ice pelletizer by step 2.1, the dry ice particles that production particle size is 3mm, deposit heat preservation
It is spare in case；
Step 2.2 pours into the 3mm dry ice particles kept in incubator in dry ice crusher, produces grain by vibrating screen
Diameter size is less than the dry ice particles of 1mm；
Step 2.3, the rear end valve for being connected with supercritical carbon dioxide opened on booster pump make supercritical carbon dioxide
Into in injection apparatus；
Step 2.4 drops into the dry ice particles less than 1mm in funnel, enters by gravity and vacuum suction effect
Injection apparatus, funnel can be adhered on hopper walls equipped with vibrator to avoid dry ice particles；
Step 2.5, the parameters for adjusting injection apparatus, make super-pressure supercritical carbon dioxide fluid carry dry ice particles
It is ejected on Cutting and Dismantling part, carries out cutting operation.
The step 3 includes the following steps:
Negative-pressure guide cover is arranged in step 3.1 in the cutting operation point range of Cutting and Dismantling part, is connected to back by air hose
Pump is received, makes to cut formation negative pressure in point range；
The carbon dioxide gas etc. that step 3.2, negative-pressure guide cover are collected into needs to be dried by drier, goes to remove water
Steam avoids vapor from drenching two-stage filter filter core；
Step 3.3, carbon dioxide gas need to allow to cool to room temperature by cooler, then use recovery pump by two
Carbon oxide gas is squeezed into storage tank by two-stage filter, cycling and reutilization；
The solid impurity being mingled in carbon dioxide gas can be filtered, separated and received using two-stage filter by step 3.4
Collection；
Step 3.5 connects air purification small car behind two-stage filter, can remove and to be mingled in carbon dioxide gas
Radioaerosol.
Beneficial effects of the present invention:
(1) it realizes super-pressure stream of supercritical carbon dioxide and carries dry ice particles to the Cutting and Dismantling of metal waste；
(2) the dismantling efficiency of a large amount of metal wastes in the elimination of nuclear facilities is improved；
(3) reduce the yield of secondary waste during disassembling；
(4) elimination of nuclear facilities Waste disposal funds have been saved；
(5) safety of staff and environment is protected, there are significant economy and society to imitate benefit.
Detailed description of the invention
Fig. 1 is the method flow diagram that a kind of super-pressure stream of supercritical carbon dioxide provided by the invention carries dry ice cutting；
In figure: 1- industrial gas cylinder, 2- make-up pump, 3- storage tank, 4- dry ice pelletizer, 5- dry ice crusher, 6- vibrating screen, 7-
Funnel, 8- booster pump, 9- heater, 10- negative-pressure guide cover, 11- spray cutter device, 12- drier, 13- recovery pump, 14-
Two-stage filter, 15- Cutting and Dismantling part.
Specific embodiment
It is dry to a kind of super-pressure stream of supercritical carbon dioxide load provided by the invention in the following with reference to the drawings and specific embodiments
The device and method of ice cutting is described in further detail.
As shown in Figure 1, a kind of super-pressure stream of supercritical carbon dioxide provided by the invention carries the cutter device of dry ice, including
Industrial gas cylinder 1, make-up pump 2, storage tank 3, dry ice pelletizer 4, dry ice crusher 5, vibrating screen 6, funnel 7, booster pump 8, heater
9, negative-pressure guide cover 10 sprays cutter device 11, drier 12, recovery pump 13, two-stage filter 14, Cutting and Dismantling part 15；
Industrial gas cylinder 1 is connect by make-up pump 2 with storage tank 3, and storage tank 3 is connect with dry ice pelletizer 4 and booster pump 8 simultaneously,
Dry ice pelletizer 4 is connect with dry ice crusher 5, and booster pump 8 is connect with heater 9；The dry ice produced from dry ice crusher 5
Grain drops into funnel 7, and vibrating screen 6 is set on funnel 7, and funnel 7 is connect with injection cutter device 11；By booster pump 8, heater
9 super-pressure supercritical carbon dioxide is connect with injection cutter device 11, and injection 11 one end of cutter device is connected with Cutting and Dismantling
Part 15, periphery are equipped with negative-pressure guide cover 10, and the carbon dioxide gas that negative-pressure guide cover 10 is collected into passes through drier 12, recovery pump
13, two-stage filter 14 is connected to storage tank 3.
The method that a kind of super-pressure stream of supercritical carbon dioxide provided by the invention carries dry ice cutting, includes the following steps:
Step 1, supercritical carbon dioxide preparation
Step 1.1, only under conditions of ensuring carbon dioxide is liquid, just can guarantee that its normal is conveyed.By industrial gas
Liquid carbon dioxide in bottle 1 is concentrated on 3 in storage tank by make-up pump 2, and pressure inside the tank control temperature in 8.0MPa, tank is room
Temperature, and cooling device and emergency and safeguard measure are installed, to ensure testing crew and testing equipment safety.Storage tank 3 is equipped with
Pressure sensor and temperature sensor, for the pressure and temperature of CO 2 fluid in real-time measurement tank.
Step 1.2, the suitable electric heater 8 of selection, heat liquid carbon dioxide, its temperature are made to be increased to 35 DEG C.
Step 1.3, the suitable booster pump 9 of selection, are pressurized liquid carbon dioxide, make its pressure can achieve 100MPa~
300MPa。
Pressure sensor and temperature sensor is arranged in step 1.4 on 9 outlet conduit of booster pump, when its pressure and temperature
When being more than its critical value, the rear end valve on booster pump 9 is opened, generates super-pressure supercritical carbon dioxide.
Step 2, super-pressure stream of supercritical carbon dioxide carry dry ice blasting
Storage tank 3 is connected in dry ice pelletizer 4 by step 2.1, and the dry ice particles that production particle size is 3mm, deposit is protected
It is spare in incubator.
Step 2.2 pours into the 3mm dry ice particles kept in incubator in dry ice crusher 5, produces by vibrating screen 6
Particle size is less than the dry ice particles of 1mm.
Step 2.3, the rear end valve for being connected with supercritical carbon dioxide opened on booster pump 9 make supercritical carbon dioxide
Into in injection apparatus 11.
Step 2.4 drops into the dry ice particles less than 1mm in funnel 7, enters by gravity and vacuum suction effect
Injection apparatus 11, funnel 7 can be adhered on hopper walls equipped with vibrator to avoid dry ice particles.
Step 2.5, the parameters for adjusting injection apparatus 11, make super-pressure supercritical carbon dioxide fluid carry dry ice
Grain is ejected on Cutting and Dismantling part 15, carries out cutting operation.
Step 3, carbon dioxide recovery
Negative-pressure guide cover 10 is arranged in step 3.1 in the cutting operation point range of Cutting and Dismantling part 15, is connected by air hose
To recovery pump 13, make to cut formation negative pressure in point range；
The carbon dioxide gas etc. that step 3.2, negative-pressure guide cover 10 are collected into needs to be dried by drier 12, goes
Except vapor, vapor is avoided to drench 14 filter core of two-stage filter；
Step 3.3, carbon dioxide gas need to allow to cool to room temperature by cooler, then use recovery pump 13 will
Carbon dioxide gas is squeezed into storage tank 3 by two-stage filter 14, cycling and reutilization；
The solid impurity being mingled in carbon dioxide gas can be filtered using two-stage filter 14, be separated simultaneously by step 3.4
It collects；
Step 3.5 connects air purification small car behind two-stage filter 14, can remove in carbon dioxide gas and be mingled with
Radioaerosol.
Claims (6)
1. the cutter device that a kind of super-pressure stream of supercritical carbon dioxide carries dry ice, it is characterised in that: including industrial gas cylinder (1),
Make-up pump (2), storage tank (3), dry ice pelletizer (4), dry ice crusher (5), vibrating screen (6), funnel (7), booster pump (8) add
Hot device (9), negative-pressure guide cover (10) spray cutter device (11), drier (12), recovery pump (13), two-stage filter (14),
Cutting and Dismantling part (15)；Industrial gas cylinder (1) is connect by make-up pump (2) with storage tank (3), and storage tank (3) connection is made with dry ice simultaneously
Grain machine (4) and booster pump (8) connection, dry ice pelletizer (4) are connect with dry ice crusher (5), booster pump (8) and heater (9)
Connection；The dry ice particles produced from dry ice crusher (5) drop into funnel (7), and vibrating screen (6), funnel are set on funnel (7)
(7) it is connect with injection cutter device (11)；By booster pump (8), the super-pressure supercritical carbon dioxide of heater (9) and injection
Cutter device (11) connection, injection cutter device (11) one end are connected with Cutting and Dismantling part (15), and periphery is equipped with negative-pressure guide cover
(10), the carbon dioxide gas that negative-pressure guide cover (10) is collected into passes through drier (12), recovery pump (13), two-stage filter
(14) it is connected to storage tank (3).
2. a kind of method that super-pressure stream of supercritical carbon dioxide carries dry ice cutting, characterized by the following steps:
Step (1), supercritical carbon dioxide preparation；Step (2), super-pressure stream of supercritical carbon dioxide carry dry ice blasting；Step
(3), carbon dioxide recovery.
3. the method that a kind of super-pressure stream of supercritical carbon dioxide according to claim 2 carries dry ice cutting, feature exist
In: the step (1) includes the following steps:
Step (1.1) concentrates on the liquid carbon dioxide in industrial gas cylinder (1) in storage tank (3) by make-up pump (2)；
Step (1.2), electric heater (8) heat liquid carbon dioxide, its temperature is made to be increased to 35 DEG C；
Step (1.3), booster pump (9) are pressurized liquid carbon dioxide, its pressure is made to can achieve 100MPa~300MPa；
Pressure sensor and temperature sensor is arranged in step (1.4) on booster pump (9) outlet conduit, when its pressure and temperature
When being more than its critical value, the rear end valve on booster pump (9) is opened, generates super-pressure supercritical carbon dioxide.
4. the method that a kind of super-pressure stream of supercritical carbon dioxide according to claim 3 carries dry ice cutting, feature exist
In: in the step (1.1), storage tank (3) pressure control in 8.0MPa, tank temperature be room temperature, and install cooling device and
Emergency and safeguard measure, to ensure testing crew and testing equipment safety；Storage tank (3) is equipped with pressure sensor and temperature sensing
Device, for the pressure and temperature of CO 2 fluid in real-time measurement tank.
5. the method that a kind of super-pressure stream of supercritical carbon dioxide according to claim 4 carries dry ice cutting, feature exist
In: the step (2) includes the following steps:
Storage tank (3) is connected on dry ice pelletizer (4) by step (2.1), the dry ice particles that production particle size is 3mm, deposit
It is spare in incubator；
Step (2.2) pours into the 3mm dry ice particles kept in incubator in dry ice crusher (5), raw by vibrating screen (6)
Produce the dry ice particles that particle size is less than 1mm；
Step (2.3), the rear end valve for being connected with supercritical carbon dioxide opened on booster pump (9) make supercritical carbon dioxide
Into in injection apparatus (11)；
Step (2.4) drops into the dry ice particles less than 1mm in funnel (7), enters by gravity and vacuum suction effect
Injection apparatus (11), funnel (7) can be adhered on hopper walls equipped with vibrator to avoid dry ice particles；
Step (2.5), the parameters for adjusting injection apparatus (11), make super-pressure supercritical carbon dioxide fluid carry dry ice
Grain is ejected on Cutting and Dismantling part (15), carries out cutting operation.
6. the method that a kind of super-pressure stream of supercritical carbon dioxide according to claim 5 carries dry ice cutting, feature exist
In: the step (3) includes the following steps:
Negative-pressure guide cover (10) are arranged in the cutting operation point range of Cutting and Dismantling part (15) in step (3.1), are connected by air hose
Recovery pump (13) are connected to, make to cut formation negative pressure in point range；
The carbon dioxide gas etc. that step (3.2), negative-pressure guide cover (10) are collected into needs to be dried by drier (12),
Vapor is removed, vapor is avoided to drench two-stage filter (14) filter core；
Step (3.3), carbon dioxide gas need to allow to cool to room temperature by cooler, then use recovery pump (13) will
Carbon dioxide gas is squeezed into storage tank (3) by two-stage filter (14), cycling and reutilization；
The solid impurity being mingled in carbon dioxide gas can be filtered using two-stage filter (14), be separated simultaneously by step (3.4)
It collects；
Step (3.5) connects air purification small car in two-stage filter (14) below, can remove in carbon dioxide gas and be mingled with
Radioaerosol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711498464.XA CN109986318A (en) | 2017-12-29 | 2017-12-29 | A kind of super-pressure stream of supercritical carbon dioxide carries dry ice cutter device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711498464.XA CN109986318A (en) | 2017-12-29 | 2017-12-29 | A kind of super-pressure stream of supercritical carbon dioxide carries dry ice cutter device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109986318A true CN109986318A (en) | 2019-07-09 |
Family
ID=67110237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711498464.XA Pending CN109986318A (en) | 2017-12-29 | 2017-12-29 | A kind of super-pressure stream of supercritical carbon dioxide carries dry ice cutter device and method |
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| Country | Link |
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| CN (1) | CN109986318A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285011A (en) * | 2020-11-26 | 2021-01-29 | 中国核动力研究设计院 | High-temperature high-pressure supercritical carbon dioxide flow accelerated corrosion test system and method |
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| TW200641985A (en) * | 2004-12-31 | 2006-12-01 | K C Tech Co Ltd | Treatment apparatus for substrate and method thereof |
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