CN103388829A - Eliminator for gypsum rain or stack rain in wet desulphurization system - Google Patents
Eliminator for gypsum rain or stack rain in wet desulphurization system Download PDFInfo
- Publication number
- CN103388829A CN103388829A CN2013103231022A CN201310323102A CN103388829A CN 103388829 A CN103388829 A CN 103388829A CN 2013103231022 A CN2013103231022 A CN 2013103231022A CN 201310323102 A CN201310323102 A CN 201310323102A CN 103388829 A CN103388829 A CN 103388829A
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- Prior art keywords
- chimney
- rain
- stack
- liquid collecting
- liquid
- 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
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 28
- 239000010440 gypsum Substances 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 105
- 239000000779 smoke Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000001174 ascending effect Effects 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 31
- 239000003546 flue gas Substances 0.000 description 29
- 239000007789 gas Substances 0.000 description 10
- 210000000481 breast Anatomy 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The invention relates to an eliminator for gypsum rain or stack rain in a wet desulphurization system. V-shaped liquid collecting rings are respectively arranged above a smoke inlet of a stack and below a smoke outlet of the stack; each V-shaped liquid collecting ring forms an included angle alpha (alpha is not smaller than 70 but is not more than 600); the bottom end of each V-shaped liquid collecting ring is provided with an opening; and the lower surface of each opening is connected with a liquid collecting tank. Each V-shaped liquid collecting ring is in a V groove shape, and the corresponding V groove-shaped included angle theta is not smaller than 300 and is not more than 900. The liquid collecting tanks are connected with a stack condensate outlet by liquid guiding tubes arranged on the inner wall or the outer wall of the stack. The bottom end of each liquid guiding tube is provided with a liquid seal. The V-shaped liquid collecting rings and the liquid collecting tanks are respectively arranged above the smoke inlet of the stack and below the smoke outlet of the stack, so that the gypsum rain or stack rain descending or ascending along the inner wall of the stack is guided into the liquid collecting tanks by the liquid collecting rings, and liquid is guided out from the liquid collecting tanks by utilizing the liquid guiding tubes, is converged into stack condensate and is discharged. The eliminator for gypsum rain or stack rain in the wet desulphurization system is simple in structure, and the gypsum rain or stack rain can be effectively eliminated under the conditions that low cost is consumed and the resistance of the system is hardly increased.
Description
Technical field
The present invention relates to a kind of device of eliminating chimney gypsum rain or chimney rain, particularly a kind of GGH(gas-to-gas heat exchanger that do not adopt) the chimney of wet process of FGD.
Background technology
In the deacidifying flue gas system of wet desulfurization of flue gas by limestone-gypsum method or some other techniques, the flue-gas temperature after absorption tower purifies, generally at 45～55 ℃, contains saturated vapor, SO
2And SO
3Deng, easily condensation produces corrosive sulfuric acid, sulfurous acid solution, absorption tower rear pass and chimney there is very strong corrosivity, early stage desulphurization system of building arranges the GGH(gas-to-gas heat exchanger mostly) utilize the former flue gas of high temperature to arrive clean flue gas more than 〉=80 ℃, thereby suppress the generation of acid condensate liquid, solve the Anticorrosion of absorption tower rear pass and chimney, improve the plume rise effective depth, reduce near chimney and land Pollutant emission concentration.But after GGH is set, is in operation and has also produced a lot of problems:
1.GGH seal the bad former smoke spillage that causes, for guaranteeing desulfuration efficiency, needing increases liquid-gas ratio, and power consumption is increased.
2., for preventing that GGH from stopping up, need often rinse at present, flushing water enters in absorption tower, and frequent flushing not only makes the external water yield of system increase, and the desulphurization system water balance is wayward, and can aggravate the corrosion to GGH.The GGH obstruction must stop desulfurizer when serious and carry out artificial on-line rinsing.
3.GGH make flue gas system resistance increase approximately 1000Pa, during obstruction, resistance increment is larger, the system power consumption increases; Moreover the expansion joint load is strengthened, and easily leak, cause when serious damaging;
Mostly cancelled GGH for the operational reliability and the economy later stage desulfurizing item that improve unit, chimney adopts the inside lining anti-corrosive material, forms the scheme of " wet chimney " discharging.But also produced series of problems:
Exhaust gas temperature is down to 45～55 ℃, and easily condensation produces corrosive sulfuric acid, sulfurous acid solution in flue and chimney, and flue and chimney are had very strong corrosivity.
After cancelling GGH, because exhaust gas temperature is low, the effective rising height of flue gas reduces, can form " gypsum rain " or " chimney rain " phenomenon near chimney, increase the flooring concentration of flue gas pollutant at the chimney near zone, long-term operation can cause plant area, near enterprise, house owed by a citizen, good farmland, vegetation etc. to be polluted." gypsum rain " refers to adopt in wet desulfurization of flue gas by limestone-gypsum method,, because containing certain density gypsum in " chimney rain ", often is called " gypsum rain "
The immediate cause of gypsum rain or chimney rain is that water droplet is arranged in flue gas, its source has: (1) sees through the ME(demister) drop carried secretly, this liquid-drop diameter is usually at 100～1000 μ m, and minority is greater than 2000 μ m, and the factors such as the performance of its amount and ME, flue gas flow rate are relevant.(2) hot saturated flue gas touches colder flue and inner wall of stack has formed condensate (3) due to the effect that is subjected to inertia force, the larger water droplet that flue gas is carried secretly bumps against on flue and chimney wall, and condensate liquid is combined on wall, and again be entrained into flue gas, these liquid-drop diameters of again being taken out of are usually between 1000～5000 μ m, and its amount depends on characteristic and the flue gas flow rate of wall.Coarse wall, higher flue gas flow rate increase the amount of carrying secretly.
Summary of the invention
Cancel the gypsum rain that produces after gas-to-gas heat exchanger or the technical problem of chimney rain in order to solve wet process of FGD, the invention provides a kind of wet desulphurization gypsum rain or chimney rain cancellation element.
For achieving the above object, technical scheme of the present invention is: a kind of wet desulphurization gypsum rain or chimney rain cancellation element, comprise chimney, V-type liquid collecting ring, collecting tank, be characterized in: the smoke inlet top of chimney and the exhanst gas outlet below of chimney arrange respectively V-type liquid collecting ring, and V-type liquid collecting ring is from the horizontal by 7
0≤ α≤60
0Angle, the bottom of V-type liquid collecting ring has open ports, is connected to collecting tank below open ports.
The cross section of V-type liquid collecting ring is V-shaped valley shape, the angle 30 of V-shaped valley shape
0≤ θ≤90
0.
Set up at least one V-type liquid collecting ring and collecting tank between two liquid collecting rings of the smoke inlet of chimney and the exhanst gas outlet of chimney.
Collecting tank connects chimney condensate liquid outlet by the liquid guiding tube that is arranged on inner wall of stack or outer wall.
Collecting tank is provided with the clear water rinse-system, is provided for monitoring the pressure transmitter whether liquid guiding tube stops up on liquid guiding tube, and the liquid guiding tube bottom arranges fluid-tight.
The invention has the beneficial effects as follows: by above the smoke inlet of chimney and below the exhanst gas outlet of chimney, V-type liquid collecting ring and collecting tank being set respectively, make gypsum rain or the chimney rain of inner wall of stack downlink or uplink introduce collecting tank through the liquid collecting ring, utilize liquid guiding tube that liquid is drawn from collecting tank according to on-site actual situations along inner wall of stack or outer wall, import the chimney condensate liquid and discharge.
For preventing that liquid guiding tube from stopping up, at the collecting tank place, the clear water rinse-system is set, regularly liquid guiding tube is rinsed.Be generally malleation in wet chimney, for preventing flue gas, escape, in the liquid guiding tube bottom, fluid-tight is set.A plurality of pressure transmitters are set liquid guiding tube is first-class, are used for the monitoring liquid guiding tube and whether stop up.
Therefore, the present invention is simple in structure, in seldom investment with increase hardly in the resistance situation of system, can effectively eliminate gypsum rain or chimney rain.
Description of drawings
Fig. 1 is that structure vertical profile of the present invention is looked;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is V-type liquid collecting ring and inner wall of stack connection diagram.
The specific embodiment
Below in conjunction with drawings and Examples, invention is further described.
As shown in Figure 1 to Figure 3, wet desulphurization gypsum rain of the present invention or chimney rain cancellation element, comprise chimney 1, near chimney breast V-type liquid collecting ring 2, near chimney breast collecting tank 3, upper-part centralized liquid bath liquid guiding tube 4, near chimney entrance V-type liquid collecting ring 5, near chimney entrance collecting tank 6, bottom liquid guiding tube 7, chimney entrance 8, fluid-tight 9, liquid collecting ring 10, chimney wall 13 etc.
Be arranged on apart from 10～20 meters inner wall of stack 13 of chimney 1 exhanst gas outlet near chimney breast V-type liquid collecting ring 2, near chimney breast collecting tank 3, be arranged near chimney breast V-type liquid collecting ring 2 belows, be used for the liquid that produces near chimney breast V-type liquid collecting ring 2; Upper-part centralized liquid bath liquid guiding tube 4 is arranged near on chimney breast collecting tank 3.Be arranged on apart from 10～20 meters inner wall of stack 13 of chimney 1 smoke inlet near chimney entrance V-type liquid collecting ring 5, near chimney entrance collecting tank 6, be arranged near chimney entrance V-type liquid collecting ring 5 belows, be used for collecting the slurries that produce near chimney entrance V-type liquid collecting ring 5; Bottom collecting tank liquid guiding tube 7 is arranged near on chimney entrance collecting tank 6.
Near chimney breast collecting tank 3 be connected chimney entrance collecting tank 6 and be connected connection chimney condensate liquid outlet with the bottom liquid guiding tube by upper-part centralized liquid bath liquid guiding tube 4 respectively, liquid guiding tube 7 bottoms in bottom arrange fluid-tight 9.On upper-part centralized liquid bath liquid guiding tube 4 and bottom liquid guiding tube 7, a plurality of pressure transmitters are set, are used for the monitoring liquid guiding tube and whether stop up.
(1) at the interface of flue and chimney, the flue gas along continuous straight runs is upwards rolled over 90 degree and is entered chimney, effect due to inertia force, the water droplet of carrying secretly in flue gas or calcium plaster drip and can hit on the chimney wall, form one deck liquid film, when flue gas flow rate surpasses flue gas again during the critical speed of entrained liquids, liquid film can be torn and again be entrained in flue gas, forms gypsum rain or chimney rain.
Based on this origin cause of formation, the present embodiment about 20 meters above the smoke inlet of distance chimney 1, arrange from the horizontal by 7
0≤ α≤60
0Close chimney entrance V-type liquid collecting ring 5, be used for to collect upwards and the liquid film that flows downward.Angle 30 near chimney entrance V-type liquid collecting ring 5 limit walls and chimney 1 vertical wall
0≤ β≤75
0, be arranged to uncovered form in the bottom near chimney entrance V-type liquid collecting ring 5, and arrange under it near chimney entrance collecting tank 6, make inner wall of stack downlink or uplink liquid film introduce collecting tank through the liquid collecting ring; Utilize liquid guiding tube that liquid is drawn from collecting tank according to on-site actual situations along inner wall of stack or outer wall, import the chimney condensate liquid and discharge.
(2) the saturated flue gas temperature in chimney is 45～55 ℃ of left and right, and because environment temperature is low than flue-gas temperature, steam can condense on the chimney wall, forms liquid film; Moreover, the drop that carries in flue gas, the size of its amount to when the design of demister performance and absorption tower relevant, in along chimney, moving upward process,, due to the turbulence of flue gas, can impinge upon and stick on wall.When flue gas flow rate surpasses flue gas again during the critical speed of entrained liquids, liquid film can be torn and again be entrained in flue gas, forms gypsum rain or chimney rain.
(3) liquid film of inner wall of stack,, according to flue gas flow rates different in chimney, can present the different fluidised form of upstream or downstream, in order to collect the liquid film of upstream or downstream, the liquid collecting ring is arranged to V-shape, and V-shaped valley is collected descending liquid film, and V-shaped valley limit wall and inner wall of stack clip slot are collected up liquid film.V-shaped valley angle 30
0≤ θ≤90
0.
(4), according to the intensity of local climate situation and gypsum rain or chimney rain, can and export between two liquid collecting rings at the smoke inlet of chimney 1 and increase one or more liquid collecting rings and collecting tank.
(5), for preventing that liquid guiding tube from stopping up, at the collecting tank place, the clear water rinse-system is set, regularly liquid guiding tube is rinsed.Be generally malleation in wet chimney, for preventing flue gas, escape, in the liquid guiding tube bottom, fluid-tight is set.
(6) a plurality of pressure transmitters are set liquid guiding tube is first-class, are used for the monitoring liquid guiding tube and whether stop up.
Claims (5)
1. a wet desulphurization gypsum rain or chimney rain cancellation element, comprise chimney, V-type liquid collecting ring, collecting tank, it is characterized in that: the smoke inlet top of described chimney and the exhanst gas outlet below of chimney arrange respectively V-type liquid collecting ring, and V-type liquid collecting ring is from the horizontal by 7
0≤ α≤60
0Angle, the bottom of V-type liquid collecting ring has open ports, is connected to collecting tank below open ports.
2. wet desulphurization gypsum rain according to claim 1 or chimney rain cancellation element, it is characterized in that: the cross section of described V-type liquid collecting ring is V-shaped valley shape, the angle 30 of V-shaped valley shape
0≤ θ≤90
0.
3. wet desulphurization gypsum rain according to claim 1 or chimney rain cancellation element, is characterized in that: set up at least one V-type liquid collecting ring and collecting tank between two liquid collecting rings of the smoke inlet of described chimney and the exhanst gas outlet of chimney.
4. wet desulphurization gypsum rain according to claim 1 or chimney rain cancellation element is characterized in that: described collecting tank connects chimney condensate liquid outlet by the liquid guiding tube that is arranged on inner wall of stack or outer wall.
5. wet desulphurization gypsum rain according to claim 4 or chimney rain cancellation element, it is characterized in that: described collecting tank is provided with the clear water rinse-system, be provided for monitoring the pressure transmitter whether liquid guiding tube stops up on liquid guiding tube, the liquid guiding tube bottom arranges fluid-tight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103231022A CN103388829A (en) | 2013-07-30 | 2013-07-30 | Eliminator for gypsum rain or stack rain in wet desulphurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103231022A CN103388829A (en) | 2013-07-30 | 2013-07-30 | Eliminator for gypsum rain or stack rain in wet desulphurization system |
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| Publication Number | Publication Date |
|---|---|
| CN103388829A true CN103388829A (en) | 2013-11-13 |
Family
ID=49533185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103231022A Pending CN103388829A (en) | 2013-07-30 | 2013-07-30 | Eliminator for gypsum rain or stack rain in wet desulphurization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103388829A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091009A (en) * | 2015-09-18 | 2015-11-25 | 中国电力工程顾问集团华东电力设计院有限公司 | Desulfurized gypsum rain separating and collecting system and spinner type chimney with system |
| CN110314453A (en) * | 2018-03-29 | 2019-10-11 | 中国电力工程顾问集团华北电力设计院有限公司 | Drop collects the compensator of discharge after wet desulphurization |
| CN110314525A (en) * | 2018-03-29 | 2019-10-11 | 中国电力工程顾问集团华北电力设计院有限公司 | The droplet collection device and drop collection system of drop are eliminated after wet desulphurization |
| CN112377935A (en) * | 2020-11-10 | 2021-02-19 | 西安热工研究院有限公司 | Chimney rain prevention and control device capable of reducing secondary carrying of flue gas |
| CN115307169A (en) * | 2022-07-28 | 2022-11-08 | 中国电力工程顾问集团华东电力设计院有限公司 | Exhaust chimney and its condensate collection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5251126A (en) * | 1975-10-22 | 1977-04-23 | Mitsubishi Chem Ind Ltd | Preventive method against the corrosion of the inner-wall of a smokest ack |
| DE20119359U1 (en) * | 2001-11-29 | 2002-02-21 | Bogade, Klaus, 91056 Erlangen | Condensate collection device for exhaust pipes |
| CN2807039Y (en) * | 2005-06-15 | 2006-08-16 | 肖昌德 | Boiler chimney flow guide ring |
| CN102944023A (en) * | 2012-10-31 | 2013-02-27 | 上海迪夫格环境科技有限公司 | Device for collecting condensed fluid on inner cylinder wall of wet chimney |
| CN202938329U (en) * | 2012-11-02 | 2013-05-15 | 上海迪夫格环境科技有限公司 | Condensate collection device at entry of wet chimney |
| CN203704004U (en) * | 2013-07-30 | 2014-07-09 | 上海龙越环保科技有限公司 | Wet desulphurization gypsum rain or chimney elimination apparatus |
-
2013
- 2013-07-30 CN CN2013103231022A patent/CN103388829A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5251126A (en) * | 1975-10-22 | 1977-04-23 | Mitsubishi Chem Ind Ltd | Preventive method against the corrosion of the inner-wall of a smokest ack |
| DE20119359U1 (en) * | 2001-11-29 | 2002-02-21 | Bogade, Klaus, 91056 Erlangen | Condensate collection device for exhaust pipes |
| CN2807039Y (en) * | 2005-06-15 | 2006-08-16 | 肖昌德 | Boiler chimney flow guide ring |
| CN102944023A (en) * | 2012-10-31 | 2013-02-27 | 上海迪夫格环境科技有限公司 | Device for collecting condensed fluid on inner cylinder wall of wet chimney |
| CN202938329U (en) * | 2012-11-02 | 2013-05-15 | 上海迪夫格环境科技有限公司 | Condensate collection device at entry of wet chimney |
| CN203704004U (en) * | 2013-07-30 | 2014-07-09 | 上海龙越环保科技有限公司 | Wet desulphurization gypsum rain or chimney elimination apparatus |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091009A (en) * | 2015-09-18 | 2015-11-25 | 中国电力工程顾问集团华东电力设计院有限公司 | Desulfurized gypsum rain separating and collecting system and spinner type chimney with system |
| CN110314453A (en) * | 2018-03-29 | 2019-10-11 | 中国电力工程顾问集团华北电力设计院有限公司 | Drop collects the compensator of discharge after wet desulphurization |
| CN110314525A (en) * | 2018-03-29 | 2019-10-11 | 中国电力工程顾问集团华北电力设计院有限公司 | The droplet collection device and drop collection system of drop are eliminated after wet desulphurization |
| CN112377935A (en) * | 2020-11-10 | 2021-02-19 | 西安热工研究院有限公司 | Chimney rain prevention and control device capable of reducing secondary carrying of flue gas |
| CN115307169A (en) * | 2022-07-28 | 2022-11-08 | 中国电力工程顾问集团华东电力设计院有限公司 | Exhaust chimney and its condensate collection device |
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Application publication date: 20131113 |