CN112927832B - Device and method for avoiding cross connection of factory exhaust and process exhaust - Google Patents
Device and method for avoiding cross connection of factory exhaust and process exhaust Download PDFInfo
- Publication number
- CN112927832B CN112927832B CN201911236183.6A CN201911236183A CN112927832B CN 112927832 B CN112927832 B CN 112927832B CN 201911236183 A CN201911236183 A CN 201911236183A CN 112927832 B CN112927832 B CN 112927832B
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- China
- Prior art keywords
- stop valve
- jet pump
- exhaust
- steam jet
- funnel
- 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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Links
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000007788 liquid Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 13
- 230000002285 radioactive effect Effects 0.000 description 8
- 238000000746 purification Methods 0.000 description 4
- 238000010793 Steam injection (oil industry) Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/02—Treating gases
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
- Pipeline Systems (AREA)
Abstract
A device for avoiding series connection of factory exhaust and process exhaust comprises a storage tank, wherein the storage tank is positioned in an equipment room and is connected with a process exhaust main pipe through a storage tank call. The device also comprises a steam inlet pipe of the steam jet pump, wherein a pipeline is connected between a check valve and a corrugated pipe stop valve on the steam inlet pipe of the steam jet pump, and the pipeline respectively comprises a flip cover, a funnel, a manual stop valve B, a lower U-bend and an upper U-bend; wherein the flip cover is arranged above the funnel; the pipeline below the funnel is connected with an inlet flange of the manual stop valve B; the outlet flange of the manual stop valve B is connected with the lower U-bend; the lower U-shaped bend is connected with the upper U-shaped bend; the upper U-bend is connected with a steam inlet pipe of the steam jet pump. The device has the characteristics of easy implementation, convenient operation, good sealing performance and capability of obviously reducing the exhaust gas.
Description
Technical Field
The invention relates to the field of exhaust, in particular to a device and a method for avoiding cross connection of factory exhaust and process exhaust.
Background
The radioactive factory building gas purification comprises a factory building exhaust purification system and a process exhaust purification system. During operation of the process system, the process exhaust gas may exceed the final safety analysis report control values, resulting in higher air-bearing effluents Σα, Σβ - γ.
The factory building exhaust and the process exhaust are respectively provided with independent purification systems, but no liquid seal is formed between a steam jet pump suction pipe in the equipment room and the pit of the equipment room and between a steam jet pump outlet pipe and the emptying tank, and the negative pressure of the process exhaust system is large relative to the factory building exhaust negative pressure in the equipment room, so that part of factory building exhaust in the equipment room can enter a storage tank in the equipment room through the pit dumping steam jet pump in the equipment room, and then enter the process exhaust system.
The total amount of sigma alpha and sigma beta-gamma emissions of the radioactive plant air-carrying effluent must be within the control range specified by national nuclear safety regulations. The radioactive airborne effluent is subjected to on-line monitoring on the alpha, beta-gamma radioactive concentration and the exhaust flow in the discharging process, and then sigma alpha and sigma beta-gamma are respectively obtained through the radioactive concentration and the exhaust flow.
Disclosure of Invention
The invention aims at: the device and the method for avoiding the cross connection of the factory exhaust and the process exhaust have the characteristics of easy implementation, convenient operation, good sealing performance and capability of obviously reducing the exhaust quantity.
The technical scheme of the invention is as follows: a device for avoiding series connection of factory exhaust and process exhaust comprises a storage tank, wherein the storage tank is positioned in an equipment room and is connected with a process exhaust main pipe through a storage tank call;
The device also comprises a steam inlet pipe of the steam jet pump, wherein a pipeline is connected between a check valve and a corrugated pipe stop valve on the steam inlet pipe of the steam jet pump, and the pipeline respectively comprises a flip cover, a funnel, a manual stop valve B, a lower U-bend and an upper U-bend; wherein the flip cover is arranged above the funnel; the pipeline below the funnel is connected with an inlet flange of the manual stop valve B; the outlet flange of the manual stop valve B is connected with the lower U-bend; the lower U-shaped bend is connected with the upper U-shaped bend; the upper U-bend is connected with a steam inlet pipe of the steam jet pump;
A manual stop valve A is arranged above a check valve on a steam inlet pipe of the steam jet pump, the lower end of the steam inlet pipe of the steam jet pump is connected with the steam jet pump, the steam jet pump is communicated with a steam jet pump inlet in a pit of the equipment chamber, and the steam jet pump is connected into a storage tank through a steam jet pump outlet pipe.
The flip adopts the hinge to carry out welded connection with the funnel.
And the pipeline below the funnel is welded with an inlet flange of the manual stop valve B.
And the outlet flange of the manual stop valve B is welded with the lower U-bend.
And welding the lower U-bend and the upper U-bend.
A method for avoiding series communication between factory exhaust and process exhaust comprises the following steps:
S1, holding a manual stop valve A in a closed state, and respectively opening a corrugated pipe stop valve, a manual stop valve B and a flip cover above a funnel; adopting a metering device, and filling deionized water or dilute nitric acid solution which is actually required according to the volume of a pit of an equipment room;
s2, slowly adding deionized water or dilute nitric acid and other solutions in the metering device in the step S1 into a funnel, and enabling the solutions to sequentially enter a pit of an equipment chamber through the funnel, a manual stop valve B, a lower U-bend, an upper U-bend, a corrugated pipe stop valve, a steam inlet pipe of a steam jet pump and the steam jet pump;
and S3, after the solution is added and the pit liquid level of the equipment room is stable, recording the volume of the added solution, the pit liquid level of the corresponding equipment room and the monitoring data of the equipment room.
In the S1, the metering device comprises a measuring cup, a beaker and a measuring cylinder
In the step S3, the equipment room data includes negative pressure, negative pressure of the process exhaust system, air flow of the process exhaust system and monitoring data of the air-borne effluents alpha and beta.
And S4, sequentially closing the corrugated pipe stop valve, the manual stop valve A, the manual stop valve B and the flip cover above the funnel.
The invention has the remarkable effects that: through carrying out the liquid feeding (adding deionized water or solution such as dilute nitric acid according to actual need) to equipment room pit (10) inside equipment room, can be with vapor jet pump suction inlet (11) remain in the water seal state all the time to the radioactive gas in the equipment room (17) has been avoided passing through vapor jet pump suction inlet (11), vapor jet pump (12), vapor jet pump outlet pipe (13), storage tank (14), storage tank call-out (15) in proper order, gets into technology exhaust manifold (16), has reduced the radioactive gas emission, makes the gaseous carrier effluent emission reach control requirement.
The liquid sealing in the liquid adding pipeline can be always kept by arranging the lower U-shaped bend (7) and the upper U-shaped bend (8) on the liquid adding pipeline, so that the radioactive gas in the equipment chamber (17) can not leak out, and the radiation safety is ensured.
Drawings
FIG. 1 is a schematic diagram of an apparatus for avoiding cross-talk between plant exhaust and process exhaust.
In the figure: 1-a manual stop valve A; 2-check valve; 3-bellows stop valve; 4-turning cover; 5-funnel; 6-a manual stop valve B; 7-bending downwards in U shape; 8-bending upwards in a U way; 9-a steam inlet pipe of a steam jet pump; 10-equipment room pit; 11-steam jet pump intake; 12-a steam jet pump; 13-a steam jet pump outlet pipe; 14-a sump; 15-tank discharge; 16-a process exhaust manifold; 17-device room
Detailed Description
The device for avoiding the cross connection of factory exhaust and process exhaust comprises a storage tank 14, wherein the storage tank 14 is positioned in an equipment room 17, and the storage tank 14 is connected with a process exhaust main pipe 16 through a storage tank call 15;
the device also comprises a steam inlet pipe 9 of the steam jet pump, and a deionized water or dilute nitric acid (which can be introduced into the solution according to actual needs) adding pipeline is connected between a check valve 2 and a corrugated pipe stop valve 3 on the steam inlet pipe (9) of the steam jet pump. The pipeline is composed of a flip cover 4, a funnel 5, a manual stop valve B6, a lower U-shaped bend 7 and an upper U-shaped bend 8. The flip 4 adopts a hinge and is welded with the funnel 5, and the flip 4 is arranged above the funnel 5; the pipeline below the funnel 5 is welded and connected with an inlet flange of the manual stop valve B6; the outlet flange of the manual stop valve B6 is welded with the lower U-shaped bend 7; the lower U-shaped bend 7 is welded with the upper U-shaped bend 8; the upper U-bend 8 is welded to the steam inlet pipe 9 of the steam jet pump.
A manual stop valve A1 is arranged above the check valve 2 on the steam inlet pipe 9 of the steam jet pump, the lower end of the steam inlet pipe 9 of the steam jet pump is connected with a steam jet pump 12, the steam jet pump 12 is communicated with a steam jet pump inlet 11 in the equipment chamber pit 10, and the steam jet pump 12 is connected with a storage tank 14 through a steam jet pump outlet pipe 13
In order to avoid the series connection of factory exhaust and process exhaust, the equipment room pit 10 inside the equipment room 17 needs to be filled with liquid (deionized water or dilute nitric acid and other solutions are added according to actual needs), so that the steam jet pump inlet 11 is kept in a water sealing state.
A method for avoiding series communication between factory exhaust and process exhaust comprises the following steps:
S1, holding a manual stop valve A1 in a closed state, and respectively opening a corrugated pipe stop valve 3, a manual stop valve B6 and a flip cover 4 above a funnel 5; a metering device (a measuring cup, a beaker, a measuring cylinder and the like) is adopted, and deionized water or dilute nitric acid solution which is actually needed is filled according to the volume of the pit 10 of the equipment room;
S2, slowly adding deionized water or dilute nitric acid and other solutions in the metering device in the S1 into a funnel (5), and enabling the solutions to sequentially enter a pit 10 of an equipment room through the funnel 5, a manual stop valve B6, a lower U-bend 7, an upper U-bend 8, a corrugated pipe stop valve 3, a steam inlet pipe 9 of a steam injection pump and a steam injection pump 12;
s3, after the solution is added and the liquid level of the equipment room pit 10 is stable, recording the volume of the added solution and corresponding monitoring data of the liquid level of the equipment room pit 10 and the negative pressure of the equipment room 17, the negative pressure of a process exhaust system, the air flow of the process exhaust system and the alpha and beta of the air-borne effluent
And S4, sequentially closing the bellows stop valve 3, the manual stop valve A1, the manual stop valve B6 and the flip cover 4 above the funnel 5.
Claims (8)
1. The utility model provides a device that avoids factory building to exhaust and technology exhaust to link up which characterized in that: the device comprises a storage tank (14), wherein the storage tank (14) is positioned in an equipment room (17), and the storage tank (14) is connected with a process exhaust manifold (16) through a storage tank call-out (15);
The device also comprises a steam inlet pipe (9) of the steam jet pump, and a pipeline is connected between a check valve (2) and a corrugated pipe stop valve (3) on the steam inlet pipe (9) of the steam jet pump, and comprises a flip cover (4), a funnel (5), a manual stop valve B (6), a lower U-bend (7) and an upper U-bend (8) respectively; wherein the flip cover (4) is arranged above the funnel (5); the pipeline below the funnel (5) is connected with an inlet flange of the manual stop valve B (6); the outlet flange of the manual stop valve B (6) is connected with the lower U-shaped bend (7); the lower U-shaped bend (7) is connected with the upper U-shaped bend (8); the upper U-bend (8) is connected with a steam inlet pipe (9) of the steam jet pump;
A manual stop valve A (1) is arranged above a check valve (2) on a steam inlet pipe (9) of the steam jet pump, the lower end of the steam inlet pipe (9) of the steam jet pump is connected with a steam jet pump (12), the steam jet pump (12) is communicated with a steam jet pump inlet (11) in a device chamber pit (10), and the steam jet pump (12) is connected into a storage tank (14) through a steam jet pump outlet pipe (13).
2. The apparatus for avoiding cross-talk between plant exhaust and process exhaust of claim 1, wherein: the flip (4) adopts a hinge and is welded with the funnel (5).
3. The apparatus for avoiding cross-talk between plant exhaust and process exhaust of claim 1, wherein: and a pipeline below the funnel (5) is welded with an inlet flange of the manual stop valve B (6).
4. The apparatus for avoiding cross-talk between plant exhaust and process exhaust of claim 1, wherein: the outlet flange of the manual stop valve B (6) is welded with the lower U-shaped bend (7).
5. The apparatus for avoiding cross-talk between plant exhaust and process exhaust of claim 1, wherein: the lower U-shaped bend (7) and the upper U-shaped bend (8) are welded.
6. A method of using the plant exhaust and process exhaust collusion prevention device according to claim 1, characterized by: the method comprises the following steps:
S1, holding a manual stop valve A (1) in a closed state, and respectively opening a corrugated pipe stop valve (3), a manual stop valve B (6) and a flip cover (4) above a funnel (5); adopting a metering device, and filling deionized water or dilute nitric acid solution which is actually required according to the volume of the equipment room pit (10);
S2, slowly adding deionized water or dilute nitric acid solution in the metering device in the S1 into the funnel (5), and enabling the solution to sequentially enter the equipment room pit (10) through the funnel (5), the manual stop valve B (6), the lower U-bend (7), the upper U-bend (8), the corrugated pipe stop valve (3), a steam inlet pipe (9) of the steam jet pump and the steam jet pump (12);
And S3, after the solution is added and the liquid level of the equipment room pit (10) is stable, recording the volume of the added solution, the liquid level of the corresponding equipment room pit (10) and the monitoring data of the equipment room (17).
7. The method for avoiding cross-talk between plant exhaust and process exhaust of claim 6, wherein: in the step S1, the metering device comprises a measuring cup, a beaker and a measuring cylinder.
8. The method for avoiding cross-talk between plant exhaust and process exhaust of claim 6, wherein: and S4, sequentially closing the bellows stop valve (3), the manual stop valve A (1), the manual stop valve B (6) and the flip cover (4) above the funnel (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911236183.6A CN112927832B (en) | 2019-12-05 | 2019-12-05 | Device and method for avoiding cross connection of factory exhaust and process exhaust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911236183.6A CN112927832B (en) | 2019-12-05 | 2019-12-05 | Device and method for avoiding cross connection of factory exhaust and process exhaust |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112927832A CN112927832A (en) | 2021-06-08 |
| CN112927832B true CN112927832B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911236183.6A Active CN112927832B (en) | 2019-12-05 | 2019-12-05 | Device and method for avoiding cross connection of factory exhaust and process exhaust |
Country Status (1)
| Country | Link |
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| CN (1) | CN112927832B (en) |
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| CN112927832A (en) | 2021-06-08 |
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