CN211987989U - Be applied to carbide slag-gypsum flue gas desulphurization unit of multitube water bed - Google Patents
Be applied to carbide slag-gypsum flue gas desulphurization unit of multitube water bed Download PDFInfo
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- CN211987989U CN211987989U CN202020105502.1U CN202020105502U CN211987989U CN 211987989 U CN211987989 U CN 211987989U CN 202020105502 U CN202020105502 U CN 202020105502U CN 211987989 U CN211987989 U CN 211987989U
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- water bed
- flue gas
- carbide slag
- tube water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 102
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000003546 flue gas Substances 0.000 title claims abstract description 72
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 32
- 239000010440 gypsum Substances 0.000 title claims abstract description 32
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 47
- 230000023556 desulfurization Effects 0.000 claims abstract description 47
- 239000002699 waste material Substances 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000003860 storage Methods 0.000 claims abstract description 16
- 238000005273 aeration Methods 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims description 34
- 239000002893 slag Substances 0.000 claims description 31
- 238000004062 sedimentation Methods 0.000 claims description 17
- 238000004537 pulping Methods 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 abstract description 6
- 238000007254 oxidation reaction Methods 0.000 abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 239000011593 sulfur Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 229910052925 anhydrite Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 208000005156 Dehydration Diseases 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000011866 long-term treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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Abstract
The utility model discloses a be applied to carbide slag-gypsum flue gas desulphurization unit of multitube water bed, including the slurrying pond, with subsider, the inside multitube water bed, the waste liquid storage tank and the aeration tank that are provided with flue gas multitube and multitube water bed reaction zone of slurrying pond intercommunication, the device can retrench entire desulfurization system's oxidation unit under the prerequisite that the assurance export flue gas sulfur content is up to standard by a wide margin, reduces the equipment investment, reduces equipment area, realizes the inside anticorrosion of water bed, reduces the economic loss who causes because of corroding.
Description
Technical Field
The utility model relates to a flue gas desulfurization technical field, more specifically the carbide slag-gypsum flue gas desulfurization device who relates to a be applied to multitube water bed that says so.
Background
The carbide slag is a byproduct generated in the production of polyvinyl chloride, and the main component of the carbide slag is Ca (OH)2The method is a toxic and harmful industrial waste material, the yield of the carbide slag reaches hundreds of millions of tons every year in China, and a plurality of enterprises producing the carbide slag adopt modes of sea filling, ditch filling or regular stacking and the like for treatment, but because the carbide slag is very easy to dissolve in water, the pollution of soil and shallow groundwater can be caused by long-term treatment in the modes, so that the soil is salinized and salinized, and the enterprises need to pay high pollution fees to environmental protection departments every year. And the carbide slag is used as a desulfurizer, so that the waste can be treated by waste, the waste is changed into valuable, the pollution of solid waste to the environment is reduced, and higher economic benefit and social benefit are achieved.
But the existing treatment device is difficult to ensure that the flue gas at the outlet of the oxidation tank reaches the desulfurization standard, the whole system of the device is complex, the occupied area is large, and on the other hand, the existing equipment is all directed at a desulfurization tower device and is difficult to apply to a small and medium-sized boiler taking a multi-pipe water bed as a desulfurization device.
Therefore, how to provide a carbide slag-gypsum flue gas desulfurization device applied to a multi-tube water bed is a problem to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a be applied to carbide slag-gypsum flue gas desulphurization unit of multitube water bed.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a carbide slag-gypsum flue gas desulfurization device applied to a multi-tube water bed comprises
The slurry making tank is used for stirring the carbide slag into carbide slag slurry, and the outside of the slurry making tank is connected with Ca (OH)2A concentration monitor;
the sedimentation tank is communicated with the pulping tank and is used for receiving the carbide slag slurry;
the side, close to the top, of the multi-pipe water bed is provided with a desulfurization slurry inlet, and the sedimentation tank is connected to the desulfurization slurry inlet through a pipeline; a flue gas multi-tube and a multi-tube water bed reaction area are arranged in the multi-tube water bed, the flue gas multi-tube is immersed in the multi-tube water bed reaction area, the multi-tube water bed reaction area is connected with a pH value monitor, and the outer side of the multi-tube water bed is connected with a water level meter;
the waste liquid storage tank is connected with the multi-pipe water bed through a pipeline;
an aeration tank for receiving and treating the waste slurry in the waste liquid storage tank.
Wherein the water level gauge is installed on the multitube water bed main part, reports to the police through setting for the water level backstage, crosses when low when the water level, increases the flow of desulfurization thick liquid circulating pump, when the water level was too high, opens the solenoid valve on the cone fill discharge pipe and stabilizes the water level.
Preferably, in the above device for flue gas desulfurization of carbide slag-gypsum applied to a multi-tube water bed, a circulating pump is arranged between the sedimentation tank and the multi-tube water bed.
Preferably, in the above device for flue gas desulfurization of carbide slag-gypsum applied to a multi-tube water bed, a stirrer is arranged in the pulping tank.
Preferably, in the above device for flue gas desulfurization of carbide slag-gypsum applied to a multi-tube water bed, the inlet of the sedimentation tank is provided with a filter screen, and the sedimentation tank is internally provided with a rotary vibrating screen.
The beneficial effects of the above technical scheme are: increase two-stage carbide slag treatment facility, the filter screen is used for filtering large granule impurity, shake the sieve soon and be used for filtering the granule impurity more than 2mm, prevent that hard particulate matter from causing wearing and tearing to sweetener.
Preferably, in the above device for flue gas desulfurization of carbide slag and gypsum applied to a multi-tube water bed, the multi-tube water bed is connected with the waste liquid storage tank through a side overflow pipe, and the multi-tube water bed is further connected with the waste liquid storage tank through a bottom cone bucket discharge pipe, and an electromagnetic valve is arranged on the cone bucket discharge pipe.
Preferably, in the above device for flue gas desulfurization of carbide slag-gypsum applied to a multi-tube water bed, an oxygen blower is connected to the outside of the aeration tank.
The technical scheme has the beneficial effects that the oxidation fan is used for introducing oxygen into the oxidation aeration tank to oxidize and reduce the waste slurry into gypsum.
Preferably, in the above device for flue gas desulfurization of carbide slag-gypsum applied to a multi-tube water bed, the top of the multi-tube water bed is provided with a flue gas inlet and a flue gas outlet, and the flue gas inlet and the flue gas outlet are both communicated with the flue gas multi-tube.
The beneficial effects of the above technical scheme are: the flue gas by flue gas entry gets into multitube water bed reaction zone through the flue gas multitube and reacts with carbide slag thick liquid, and the desulfurization process is accomplished the back and is purified the flue gas by the exhanst gas outlet is discharged.
Preferably, in the above device for flue gas desulfurization of carbide slag-gypsum applied to a multi-tube water bed, the flue gas multi-tube is immersed in the reaction zone of the multi-tube water bed for 1.2-1.5m, so as to ensure the full contact between the flue gas and the carbide slag.
According to the above technical scheme, compared with the prior art, the utility model discloses a be applied to carbide slag-gypsum flue gas desulfurization device of multitube water bed has following advantage:
the utility model discloses guaranteeing to export the flue gas and containing under the prerequisite that the sulphur content is up to standard, retrenching whole desulfurization system's oxidation unit by a wide margin reduces the equipment investment, reduces equipment area, realizes the inside anticorrosion of water bed simultaneously, reduces the economic loss because of corroding and leading to the fact.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural view of a carbide slag-gypsum flue gas desulfurization device applied to a multi-tube water bed according to the present invention;
FIG. 2 is a logic diagram of the pH value adjusting method of the carbide slag-gypsum flue gas desulfurization device applied to the multi-tube water bed according to the embodiment of the present invention;
FIG. 3 is a logic diagram of the water level adjusting method of the carbide slag-gypsum flue gas desulfurization device applied to the multi-tube water bed of the embodiment of the present invention.
In the context of the figures, it is,
1 is a pulping tank, 2 is Ca (OH)2The device comprises a concentration monitor, a sedimentation tank, a rotary vibration sieve, a filter screen, a multi-pipe water bed, a flue gas multi-pipe, a multi-pipe water bed reaction zone, a pH value monitor, a waste liquid storage tank, an aeration tank, a circulating pump, an overflow pipe, a cone hopper discharge pipe, an electromagnetic valve, an oxygen fan and a water level meter, wherein the sedimentation tank is 3, the rotary vibration sieve is 31, the filter screen is 32, the multi-pipe water bed is 4, the flue gas multi-pipe is 41, the multi-pipe water bed reaction zone is 42.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model discloses be applied to carbide slag-gypsum flue gas desulfurization device of multitube water bed, include
A slurry making tank 1, wherein the slurry making tank 1 is used for stirring the carbide slag into carbide slag slurry, and the outside of the slurry making tank 1 is connected with Ca (OH)2A concentration monitor 2;
the sedimentation tank 3 is communicated with the pulping tank 1 and is used for receiving the carbide slag slurry;
a desulfurization slurry inlet is formed in one side, close to the top, of the multi-pipe water bed 4, and the sedimentation tank 3 is connected to the desulfurization slurry inlet through a pipeline; a flue gas multi-pipe 41 and a multi-pipe water bed reaction area 42 are arranged in the multi-pipe water bed 4, the flue gas multi-pipe 41 is immersed in the multi-pipe water bed reaction area 42, the multi-pipe water bed reaction area 42 is connected with a pH value monitor 5, and the outer side of the multi-pipe water bed 4 is connected with a water level meter 13;
the waste liquid storage tank 6 is connected with the multi-pipe water bed 4 through a pipeline;
an aeration tank 7, wherein the aeration tank 7 is used for receiving and treating the waste slurry in the waste liquid storage tank 6.
In order to further optimize the technical scheme, a circulating pump 8 is arranged between the sedimentation tank 3 and the multi-pipe water bed 4.
In order to further optimize the technical scheme, a stirrer 11 is arranged in the pulping tank 1.
In order to further optimize the technical scheme, a filter screen 32 is arranged at the inlet of the sedimentation tank, and a rotary vibration screen 31 is arranged in the sedimentation tank 3.
In order to further optimize the technical scheme, the multi-tube water bed 4 is connected with the waste liquid storage pool 6 through an overflow pipe 9 on the side edge, the multi-tube water bed 4 is connected with the waste liquid storage pool 6 through a cone bucket discharge pipe 10 on the bottom, and an electromagnetic valve 11 is arranged on the cone bucket discharge pipe 10.
In order to further optimize the technical scheme, an oxygen fan 12 is connected outside the aeration tank 7.
In order to further optimize the technical scheme, the top of the multi-pipe water bed 4 is provided with a flue gas inlet and a flue gas outlet, and the flue gas inlet and the flue gas outlet are both communicated with the flue gas multi-pipe 41.
To further optimize the above solution, the flue gas manifold 41 is immersed in a multi-manifold water bed reaction zone 421.2-1.5 m.
The embodiment of the utility model takes a 75t/h coal-fired furnace of a multi-tube water bed of a certain thermal power plant which adopts carbide slag as a desulfurizer as an example, the smoke volume is 150000m3The density of sulfur dioxide at the flue gas inlet of the multi-tube water bed is 3000mg/Nm3The desulfurization efficiency was designed to be 96%. The carbide slag-gypsum flue gas desulfurization process method of the multi-tube water bed comprises the following steps:
(A) carbide slag powder in a carbide slag binFinally, the mixture is sent to a pulping pool for stirring by a belt feeder when Ca (OH)2When the concentration of the raw materials reaches 12%, immediately stopping feeding;
(B) mixing carbide slag powder and water by using a stirrer to prepare carbide slag slurry, allowing the stirred carbide slag slurry to flow into a sedimentation tank from an inlet of the sedimentation tank, performing primary filtration by using a filter screen on the way, performing secondary filtration on the carbide slag slurry flowing into the sedimentation tank by using a rotary vibrating screen, and conveying the filtered and settled carbide slag slurry supernatant into a multi-tube water bed reaction zone by using a desulfurization slurry circulating pump;
(C1) flue gas generated by the boiler is treated by a bag-type dust collector, enters a flue through a multi-pipe water bed flue gas inlet, is conveyed to a multi-pipe water bed reaction area by a plurality of flue gas pipes, and reacts with carbide slag supernatant;
(C2) the flue gas after desulfurization is discharged from a flue gas outlet of the multi-tube water bed, and the discharged purified flue gas is pumped to a chimney by a draught fan and is discharged;
(D1) CaSO inhibition in acidic environment3To form Ca (HSO) in the product3)2Is increased due to Ca (OH)2The concentration of (C) is relatively low, and the produced CaS04Far from its saturation, can not make CaSO4Saturation is reached to generate precipitate, so that whether the pH value in the reaction area of the multi-tube water bed is in the range of 5.2-6.0 and whether the water level is at the overflow pipe is judged, if the pH value is not in the range of 5.2-6.0, the step (D2) is carried out, if the water level of the water bed is not at the overflow pipe, the step (D3) is carried out, and if the pH value and the water level are all in the specified range, the process (D4) is carried out;
(D2) when the pH value in the multi-pipe water bed reaction area is lower than 5.2, opening a cone bucket electromagnetic valve to discharge waste slurry and increasing the frequency of a desulfurization slurry circulating pump to carry out fluid infusion;
(D3) when the liquid level of the desulfurization slurry in the multi-tube water bed reaction area is lower than the position of the overflow pipe, the frequency of a desulfurization slurry circulating pump is increased to supplement the desulfurization slurry;
(D4) if the pH value and the water level in the multi-tube water bed reaction area meet the requirements, discharging the waste liquid after the reaction with the flue gas through an overflow pipe in a constant flow mode, opening a cone hopper electromagnetic valve at the frequency of 1.5min, and keeping for 10s each time to discharge the waste liquid;
(E) the waste slurry is discharged into a waste liquid storage tank through an overflow pipe and a cone hopper discharge pipe, naturally flows into an aeration tank from the waste liquid storage tank, and is introduced with oxygen into the aeration tank by using an oxidation fan, so that the aeration rate is ensured to be more than 80%, and CaSO is reduced4·2H2O；
(F) The reduced CaSO4·2H2And (4) grabbing the O out through an electric grab bucket, and conveying the O to a cyclone separator and a vacuum belt conveyor for dehydration treatment to finally generate available product gypsum, wherein the dehydration rate of the gypsum reaches about 80%.
The thermal power plant of the above embodiment adopts the utility model discloses an above-mentioned device is applied to carbide slag-gypsum flue gas desulfurization method of multitube water bed has following advantage:
(1) the thickness of the scale layer in the whole device can be controlled to be 3 mm/year, so that the later maintenance cost is reduced, and the economic loss caused by corrosion and liquid leakage is avoided;
(2) the coal-fired boiler with the volume of 75t/h can treat more than 500 tons of carbide slag every half year, reduce the emission of more than 9500 tons of sulfur dioxide, save the raw material cost of a desulfurizer by up to 40 ten thousand yuan, reduce the pollution problem to the environment caused by long-term accumulation of the carbide slag and realize an ideal operation mode of treating wastes with processes of wastes against one another and saving cost;
(3) adopt the utility model discloses a be applied to carbide slag-gypsum flue gas desulfurization device of multitube water bed, according to Ca (OH) in the carbide slag2The content of the sulfur is different, and the desulfurization efficiency reaches 96-99 percent.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A carbide slag-gypsum flue gas desulfurization device applied to a multi-tube water bed is characterized by comprising
The slurry making tank is used for stirring the carbide slag into carbide slag slurry, and the outside of the slurry making tank is connected with Ca (OH)2A concentration monitor;
the sedimentation tank is communicated with the pulping tank and is used for receiving the carbide slag slurry;
the side, close to the top, of the multi-pipe water bed is provided with a desulfurization slurry inlet, and the sedimentation tank is connected to the desulfurization slurry inlet through a pipeline; a flue gas multi-tube and a multi-tube water bed reaction area are arranged in the multi-tube water bed, the flue gas multi-tube is immersed in the multi-tube water bed reaction area, the multi-tube water bed reaction area is connected with a pH value monitor, and the outer side of the multi-tube water bed is connected with a water level meter;
the waste liquid storage tank is connected with the multi-pipe water bed through a pipeline;
an aeration tank for receiving and treating the waste slurry in the waste liquid storage tank.
2. The carbide slag-gypsum flue gas desulfurization device applied to the multi-tube water bed as claimed in claim 1, wherein a circulating pump is arranged between the settling tank and the multi-tube water bed.
3. The carbide slag-gypsum flue gas desulfurization device applied to the multi-tube water bed as claimed in claim 1, wherein a stirrer is provided in the pulping tank.
4. The carbide slag-gypsum flue gas desulfurization device applied to the multi-tube water bed as claimed in claim 1, wherein the inlet of the settling tank is provided with a filter screen, and the settling tank is provided with a rotary vibrating screen.
5. The carbide slag-gypsum flue gas desulfurization device applied to the multi-tube water bed as claimed in claim 1, wherein the multi-tube water bed is connected with the waste liquid storage tank through a side overflow pipe, and the multi-tube water bed is also connected with the waste liquid storage tank through a bottom cone bucket discharge pipe, and a solenoid valve is arranged on the cone bucket discharge pipe.
6. The carbide slag-gypsum flue gas desulfurization device applied to the multi-tube water bed as claimed in claim 1, wherein an oxygen blower is connected to the outside of the aeration tank.
7. The carbide slag-gypsum flue gas desulfurization device applied to the multi-tube water bed as claimed in claim 1, wherein a flue gas inlet and a flue gas outlet are arranged at the top of the multi-tube water bed, and the flue gas inlet and the flue gas outlet are both communicated with the flue gas multi-tube.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111054207A (en) * | 2020-01-17 | 2020-04-24 | 国惠环保新能源有限公司 | Carbide slag-gypsum flue gas desulfurization device and method applied to multi-tube water bed |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111054207A (en) * | 2020-01-17 | 2020-04-24 | 国惠环保新能源有限公司 | Carbide slag-gypsum flue gas desulfurization device and method applied to multi-tube water bed |
| CN111054207B (en) * | 2020-01-17 | 2024-02-02 | 国惠环保新能源有限公司 | Carbide slag-gypsum flue gas desulfurization device and method applied to multi-pipe water bed |
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