CN107830698A - Drying system and drying means in a kind of radioactive solid waste stove - Google Patents
Drying system and drying means in a kind of radioactive solid waste stove Download PDFInfo
- Publication number
- CN107830698A CN107830698A CN201711283111.8A CN201711283111A CN107830698A CN 107830698 A CN107830698 A CN 107830698A CN 201711283111 A CN201711283111 A CN 201711283111A CN 107830698 A CN107830698 A CN 107830698A
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- China
- Prior art keywords
- drying
- solid waste
- air
- blower
- drying oven
- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/009—Alarm systems; Safety sytems, e.g. preventing fire and explosions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention relates to drying system in a kind of radioactive solid waste stove, corresponding drying means is also related to, belongs to Radwastes treatment technical field.The system includes drying oven and condensation liquid case, and drying oven has the main circulation loop that heating blower and heater of the top through concatenation are connected to drying oven side, and the distribution pipeline of condensation liquid case is connected to through cooler, steam-water separator and metering device；The gas vent of steam-water separator is connected to main circulation loop through cooling blower and forms return line, and cooling blower and heating blower are respectively equipped with corresponding regulating valve；The gas vent of condensation liquid case and steam-water separator connects vaccum-pumping equipment and forms vacuum generation path.Present invention effectively prevents the discharge of radgas in drying process, improves the utilization rate of air, both saves energy consumption, significantly reduce secondary pollution again.
Description
Technical field
The present invention relates to a kind of drying system, drying system in especially a kind of radioactive solid waste stove, while also relate to
And corresponding drying means, belong to Radwastes treatment technical field.
Background technology
Drying system is used to the solid radiation in nuclear power plant being placed in drying oven in radioactive solid waste stove, uses
The mode of recirculated hot air heating, to processing is dried containing wet waste, the moisture in solid waste is reduced, meets it follow-up
The requirement of processing.
Authorization Notice No. is that the B of CN 102708940 patent of invention discloses a kind of wet waste drying device for nuclear power plant.Should
Device, it is necessary to lasting supplement air into device from the external world, while would be possible to containing putting during the wet waste of drying
The air of penetrating property material is discharged to the external world, not only wastes energy, can also produce secondary pollution.
In addition, the Chinese invention patent of application number 200910108272.2,201310302388.6,201610905494.7
Application discloses waste gas treatment method of nuclear power plant and its processing unit, radioactive sludge processing method and radioactive spent resin respectively
The related art schemes such as vacuum drying method.But or these technical schemes are not to be directed to the wet useless solid processing method of radioactivity,
The shunting cooling of drying process is not referred to, otherwise need to be stirred increase evaporation rate using agitator when drying,
It is useless solid not to be suitable for the compressible wet solid of drying process, does not properly settle outer row's problem of the air containing radioactive substance.
The content of the invention
It is an object of the invention to：The problem of in background technology, there is provided a kind of useless solid in the compressible wet solid of processing
Radgas can be avoided to arrange during (including containing the daily necessitiess such as radioactive wet clothes, pit mud, waste and old filter core)
Drying system in the radioactive solid waste stove put, while corresponding method is provided, so as to substantially reduce secondary pollution.
To reach the purpose of invention, drying system in radioactive solid waste stove of the invention, including drying oven and condensation
Liquid case, the drying oven have the main circulation loop that heating blower and heater of the top through concatenation are connected to drying oven side, with
And the distribution pipeline of condensation liquid case is connected to through cooler, steam-water separator and metering device；The gas of the steam-water separator goes out
Mouth is connected to main circulation loop through cooling blower and forms return line, and the cooling blower and heating blower are respectively equipped with corresponding tune
Save valve；The gas vent of the condensation liquid case and steam-water separator connects vaccum-pumping equipment and forms vacuum generation path.
Drying means using drying system in radioactive solid waste stove of the present invention comprises the following steps：
The first step, establish vacuum --- intake valve is closed, starts vacuum generating equipment, whole system is kept predetermined true
Reciprocal of duty cycle；
Second step, heating evaporation --- solid waste is put into drying oven, cooling blower is closed, and starts heating blower,
Furnace air is heated to by generation vapor by the hot-air of main circulation loop, hot-air steams moisture with solid waste heat exchange
Hair is mixed to form containing humid air with air；
3rd step, drying, condensation --- start cooling blower, predetermined portions is passed through containing humid air after cooler cools down
Steam-water separator, condensation liquid case is flow to after condensation water metering device metering, the gas isolated is then by cooling blower and heating
Blower fan sends drying oven back to；
4th step, metering judge --- detection metering device, when the unit volume condensate liquid generation time of its record is less than
During predetermined value, continue above step；When the unit volume condensate liquid generation time of its record is more than predetermined value, entrance is next
Step；
5th step, terminate drying --- each equipment of system is closed, takes out the solid waste in drying oven.
The present invention effectively can prevent recyclegas from leaking using the vacuum environment in vacuum equipment maintenance system.And build
The reasonable major cycle pipeline (heating pipeline) and distribution pipeline (cooling tube stood on the basis of systems thermodynamics theoretical analysis and calculation
Road), recirculated hot air can be utilized to dry radioactive solid waste, and pass through governor valve control heating blower in the drying process
With the air quantity ratio of cooling blower, by a certain proportion of containing humid air cooling, separation, moisture becomes condensate liquid and carries out metrics collection；
Air is then sent back to major cycle pipeline again, so as to avoid being arranged outside radgas.
In summary, present invention effectively prevents the discharge of radgas in drying process, the utilization of air is improved
Rate, energy consumption is both saved, significantly reduces secondary pollution again.
Further improve of the invention is that intake valve (12) control is further connected between the cooling blower and heating blower
Air inlet branch road, for take the circumstances into consideration control supplement air.When detecting pernicious gas content overproof in stove, can be properly filled into new
Fresh air, to reduce the content of pernicious gas in system.
Brief description of the drawings
Fig. 1 is the system structure diagram of one embodiment of the invention.
Specific implementation method
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Drying system in the radioactive solid waste stove of the present embodiment is as shown in figure 1, drying oven 1 has top through concatenation
Heating blower 3 and heater 2 are connected to the main circulation loop of the side of drying oven 1, and through cooler 7, steam-water separator 8 and metering
Device 9 is connected to the distribution pipeline of condensation liquid case 11.Hot blast regulating valve 4 is provided with before heating blower 3, heater 2 can be that electricity adds
Hot device, various heat exchangers can also be used to use various heat exchangers as heater, cooler 7.
The gas vent of steam-water separator 8 is connected to main circulation loop through cooling blower 5 and forms return line.Cooling blower 5
It is preceding to be provided with cold air adjusting valve 6.The gas vent of condensation liquid case 11 and steam-water separator 8 connects vacuumizes wind as vaccum-pumping equipment
Machine 10, form vacuum and path occurs.
The air inlet branch road of the control of intake valve 12 is connected between cooling blower 5 and heating blower 3, can be set by intake valve 12
One manually-operated gate in parallel, keeps certain aperture during whole service, is so advantageous to and vacuumizes blower fan cooperation guarantor
Hold system negative pressure.
It is as follows using the drying system course of work in the radioactive solid waste stove of the present embodiment：
The first step, establish vacuum --- intake valve is closed, starts vacuum generating equipment, whole system is kept predetermined true
Reciprocal of duty cycle；Manual override door by intake valve keeps predetermined aperture.
Second step, heating evaporation --- barreled solid waste is put into drying oven, cooling blower is closed, and starts heating wind
Machine, when furnace air being heated into 100 DEG C or so by the hot-air of main circulation loop, produce vapor in stove, hot-air with
Solid waste heat exchange makes moisture evaporation be mixed to form with air containing humid air.
3rd step, dry condensation --- start cooling blower, predetermined portions is passed through containing humid air after cooler cools down
Steam-water separator, condensation liquid case is flow to after condensation water metering device metering, the gas isolated is then by cooling blower and heating
Blower fan sends drying oven back to；
4th step, metering judge --- detection metering device, when the unit volume condensate liquid generation time of its record is less than
During predetermined value, continue above step；When the unit volume condensate liquid generation time of its record is more than predetermined value, entrance is next
Step.
5th step, terminate drying --- each equipment of system is closed, takes out the solid waste in drying oven.
Above procedure starts cooling blower and the partial HAT discharged in drying oven is diverted into cooler, and humid air is through cold
But enter steam-water separator afterwards and carry out steam-water separation.Wherein, the cooled blower fan of air isolated, which is taken away, is back to heating pipeline
Mixed with remaining hot-air discharged in drying oven, be sent into by heating blower after heater circulating-heating and convey heat to drying oven
Amount, and the vapor evaporated is absorbed again, form humid air.The partial air is joined in system all the time during whole service
With heat cycles, there is no gas discharge system, without participating in heat cycles by external world's supplement air, work in system operation
It is more stable to make condition, while avoids radioactive substance from being carried over system too much.
The condensate liquid isolated is discharged into condensation liquid case after metering into metering device.By recording unit volume condensate liquid
The caused time calculates condensate liquid and produces speed, and when speed is less than certain value, wet solid drying process of giving up terminates.
In order to better profit from the energy of heating blower offer, and evaporative drying process is full out completed, added respectively
Hot blast regulating valve and cold air adjusting valve are provided with before air-heater and cooling blower.By the aperture of control valve, shunting is adjusted
Enthalpy of moist air, the power of the power of heater and cooler in whole processing procedure is rationally sufficiently utilized, ensure whole
Running is effectively swimmingly carried out.
In running, using the vacuum environment in vacuum blower maintenance system, prevent recyclegas from outwardly leaking.Control
System processed is adjusted the rotating speed of vacuum blower by frequency converter, made true in drying oven by monitoring the real-time pressure in drying oven
Reciprocal of duty cycle maintains certain level.
When the system is operated, the content of pernicious gas in stove, furnace gas pernicious gas are detected by gas detecting system
When content is higher, intake valve, which is opened, is filled with air into system, to reduce the content of pernicious gas in system.When being fired in stove
When burning or pernicious gas too high levels, system institute band fire-fighting system is opened.
In summary, drying system dries radioactivity using recirculated hot air in the radioactive solid waste stove of the present embodiment
Solid waste, become condensate liquid containing humid air cooling, separation, moisture therein by a certain proportion of and measured in drying process
Collect；Air is then sent back to major cycle pipeline again.Its remarkable advantage is：The utilization rate of air is improved, is greatly reduced dry
The discharge of radgas during dry, both saves energy consumption, significantly reduces the possibility of secondary pollution again.
The technical principle of the present invention is described above in association with specific implementation.These descriptions are intended merely to explain the original of the present invention
Reason, and the limitation of the scope of the present invention can not be construed in any way.Based on explanation herein, those skilled in the art
Would not require any inventive effort can associate other embodiments of the present invention, and these modes fall within this hair
Within bright protection domain.
Claims (4)
1. drying system in a kind of radioactive solid waste stove, including drying oven (1) and condensation liquid case (11), it is characterised in that：
The drying oven has the main circulation loop that heating blower (3) and heater (2) of the top through concatenation are connected to drying oven side, with
And the distribution pipeline of condensation liquid case is connected to through cooler (7), steam-water separator (8) and metering device (9)；The steam-water separator
(8) gas vent is connected to main circulation loop through cooling blower (5) and forms return line, the cooling blower and heating blower point
She You not corresponding regulating valve (4,6)；The gas vent of the condensation liquid case and steam-water separator (8) connects vaccum-pumping equipment (10)
Form vacuum and path occurs.
2. drying system in radioactive solid waste stove according to claim 1, it is characterised in that：The cooling blower with
The air inlet branch road of intake valve (12) control is further connected between heating blower.
3. drying system in radioactive solid waste stove according to claim 2, it is characterised in that：Set by the intake valve
There is the manually-operated gate of parallel connection.
4. using the drying means of drying system in any described radioactive solid waste stove of claims 1 to 3, its feature exists
In comprising the following steps：
The first step, establish vacuum --- intake valve is closed, starts vacuum generating equipment, whole system is kept predetermined vacuum
Degree；
Second step, heating evaporation --- solid waste is put into drying oven, cooling blower is closed, and is started heating blower, is passed through
Furnace air is heated to produce vapor by the hot-air of main circulation loop, the heat exchange of hot-air and solid waste make moisture evaporation with
Air is mixed to form containing humid air；
3rd step, drying, condensation --- start cooling blower, predetermined portions is passed through carbonated drink after cooler cools down containing humid air
Separator, condensation liquid case is flow to after condensation water metering device metering, the gas isolated is then by cooling blower and heating blower
Send drying oven back to；
4th step, metering judge --- detection metering device, when the unit volume condensate liquid generation time of its record is less than predetermined
During value, continue above step；When the unit volume condensate liquid generation time of its record is more than predetermined value, into next step；
5th step, terminate drying --- each equipment of system is closed, takes out the solid waste in drying oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711283111.8A CN107830698A (en) | 2017-12-07 | 2017-12-07 | Drying system and drying means in a kind of radioactive solid waste stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711283111.8A CN107830698A (en) | 2017-12-07 | 2017-12-07 | Drying system and drying means in a kind of radioactive solid waste stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107830698A true CN107830698A (en) | 2018-03-23 |
Family
ID=61641771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711283111.8A Pending CN107830698A (en) | 2017-12-07 | 2017-12-07 | Drying system and drying means in a kind of radioactive solid waste stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107830698A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380334A (en) * | 2018-12-28 | 2020-07-07 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Radioactive wet waste treatment system and heating device |
| CN113218156A (en) * | 2021-04-27 | 2021-08-06 | 一重集团大连工程技术有限公司 | Dryer for drying treatment in middle-low radioactive solid waste barrel |
| CN115031492A (en) * | 2022-06-22 | 2022-09-09 | 上海核烨工程技术有限公司 | Method for directly drying radioactive wet waste in barrel and drying device |
| CN115164526A (en) * | 2022-06-28 | 2022-10-11 | 中核核电运行管理有限公司 | Radioactive sludge drying system |
| CN115325784A (en) * | 2022-07-22 | 2022-11-11 | 航天晨光股份有限公司 | Operation method of radioactive humid waste drying treatment system |
| CN115325787A (en) * | 2022-07-22 | 2022-11-11 | 航天晨光股份有限公司 | Drying system and drying method in radioactive wet waste barrel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708940A (en) * | 2012-05-21 | 2012-10-03 | 浙江博凡动力装备有限公司 | Wet waste drying device for nuclear power plant |
| CN103072166A (en) * | 2012-12-21 | 2013-05-01 | 中国林业科学研究院木材工业研究所 | Closed wood fiber drying method |
| CN103512317A (en) * | 2012-06-18 | 2014-01-15 | 苏州忠辉蜂窝陶瓷有限公司 | Honeycomb ceramic body microwave drying method |
| CN208536509U (en) * | 2017-12-07 | 2019-02-22 | 航天晨光股份有限公司 | Drying system in a kind of radioactive solid waste furnace |
-
2017
- 2017-12-07 CN CN201711283111.8A patent/CN107830698A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708940A (en) * | 2012-05-21 | 2012-10-03 | 浙江博凡动力装备有限公司 | Wet waste drying device for nuclear power plant |
| CN103512317A (en) * | 2012-06-18 | 2014-01-15 | 苏州忠辉蜂窝陶瓷有限公司 | Honeycomb ceramic body microwave drying method |
| CN103072166A (en) * | 2012-12-21 | 2013-05-01 | 中国林业科学研究院木材工业研究所 | Closed wood fiber drying method |
| CN208536509U (en) * | 2017-12-07 | 2019-02-22 | 航天晨光股份有限公司 | Drying system in a kind of radioactive solid waste furnace |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380334A (en) * | 2018-12-28 | 2020-07-07 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Radioactive wet waste treatment system and heating device |
| CN113218156A (en) * | 2021-04-27 | 2021-08-06 | 一重集团大连工程技术有限公司 | Dryer for drying treatment in middle-low radioactive solid waste barrel |
| CN115031492A (en) * | 2022-06-22 | 2022-09-09 | 上海核烨工程技术有限公司 | Method for directly drying radioactive wet waste in barrel and drying device |
| CN115164526A (en) * | 2022-06-28 | 2022-10-11 | 中核核电运行管理有限公司 | Radioactive sludge drying system |
| CN115164526B (en) * | 2022-06-28 | 2023-11-14 | 中核核电运行管理有限公司 | Radioactive sludge drying system |
| CN115325784A (en) * | 2022-07-22 | 2022-11-11 | 航天晨光股份有限公司 | Operation method of radioactive humid waste drying treatment system |
| CN115325787A (en) * | 2022-07-22 | 2022-11-11 | 航天晨光股份有限公司 | Drying system and drying method in radioactive wet waste barrel |
| CN115325787B (en) * | 2022-07-22 | 2023-05-16 | 航天晨光股份有限公司 | Drying system and drying method in radioactive wet waste barrel |
| CN115325784B (en) * | 2022-07-22 | 2023-05-16 | 航天晨光股份有限公司 | Operation method of radioactive wet waste drying treatment system |
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