CN101822927B - Purification method of high-temperature furnace gas and purification device thereof - Google Patents
Purification method of high-temperature furnace gas and purification device thereof Download PDFInfo
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- CN101822927B CN101822927B CN 201010108781 CN201010108781A CN101822927B CN 101822927 B CN101822927 B CN 101822927B CN 201010108781 CN201010108781 CN 201010108781 CN 201010108781 A CN201010108781 A CN 201010108781A CN 101822927 B CN101822927 B CN 101822927B
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- venturi tube
- furnace gas
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- dedusting
- dehydrator
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000000746 purification Methods 0.000 title claims abstract description 24
- 238000002309 gasification Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000428 dust Substances 0.000 claims abstract description 19
- 238000005507 spraying Methods 0.000 claims abstract description 17
- 238000005245 sintering Methods 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 59
- 239000007921 spray Substances 0.000 claims description 41
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 239000003034 coal gas Substances 0.000 claims description 8
- 239000012716 precipitator Substances 0.000 claims description 6
- 239000000969 carrier Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 11
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 53
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008816 organ damage Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- -1 spill box Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
The invention relates to a purification method of high-temperature furnace gas, comprising the following steps of: removing large-particle dust in the furnace gas by using a dust remover, coarsely removing dust and reducing temperature by using an overflow water tank, reducing temperature and removing dust by using a repeated spraying tower, finely removing dust and reducing temperature by using a Venturi tube, dehydrating by using a dehydrator, and then pressurizing by using an air blower for sintering or combustion for evacuation. The invention also provides a multi-stage purification device adopted by the purification method of high-temperature furnace gas. Due to the multi-stage temperature-reduced dust removal in the purification process, the efficiency of temperature-reduced dust removal is improved, and a better effect is obtained; moreover, the multi-stage temperature-reduced dust removal has lower requirements on the power of each of equipment than single-stage dust removal, and therefore, equipment with lower cost can be adopted in the method so as to reduce the purchasing cost.
Description
Technical field
The present invention relates to the dedusting technology field, be specifically related to the purification method of high-temperature furnace gas and the purifier that is adopted thereof.
Background technology
The about 5500Nm3/h of maximum exhaust gas volumn that utilizes the production and processing of closed manganese silicon electric furnace to be produced, 300 ℃～500 ℃ of furnace gas temperatures, maximum temperature is no more than 700 ℃, dustiness 25～45g/Nm3, in the gas componant, coal gas composition: CO 65～75%, H
23～5%, CH
45～7%, O
2＜2%, N
2～9.7%; Stove dirt composition: SO
25～15%, Al
2O
33～7%, FeO～3%, MgO 0.5～3%, and CaO 4～6%, and C 0.1～0.5%, and P 0.1%, and Mn 17～30%; Smoke granularity is formed: 0～1 μ m:＜10%, 3～10 μ m:＜80%, 10～40 μ m:＜10%.Owing to contain a large amount of toxic gases such as CO, easily cause environmental pollution, directly suction also can cause the human organ damage, thus furnace gas can not directly discharge, must the process purified treatment.Existing purification method comprises furnace gas dedusting and cooling step, and the dedusting cooling claimed apparatus power of single-stage is big, and equipment is superior, so equipment cost is higher, and the efficient of purification is also not fully up to expectations.
Summary of the invention
Of the present invention at above the deficiencies in the prior art, a kind of purification method of multistage high-temperature furnace gas is provided.
The present invention is achieved by the following technical solutions:
Purification method of high-temperature furnace gas, described purification method comprises the steps: that furnace gas removes big dust particle, the thick dedusting cooling of spill box, sprays tower cooling dedusting, the smart dedusting cooling of Venturi tube, dehydrator dehydration and air blast pressurization again through deduster successively, and sintering uses or burning emptying afterwards.
Adopt interconnective one-level Venturi tube and secondary Venturi tube to carry out double smart dedusting cooling in the smart dedusting cooling step of Venturi tube; After the described air blast pressurization steps furnace gas continue is adopted big backflow pressurized operation, the furnace gas of this big backflow after with the Roots blower pressurization be back to after the smart dedusting cooling of one-level Venturi tube, in the pipeline before the smart dedusting cooling of secondary Venturi tube.
Spray again and adopt two-stage to spray tower cooling dedusting again in the tower cooling dust removal step; The first order is located at after the thick dedusting cooling step of spill box, before the smart dedusting cooling of Venturi tube; The second level is located at after the smart dedusting cooling of Venturi tube, before the dehydrator dehydration.
Adopt coal gas to carry out sintering in the described sintering step.
Adopt little backflow repeatedly to pressurize in the described air blast pressurization steps, the furnace gas after Roots blower is pressurizeed in this little backflow is back to after the dehydrator dehydration, in the pipeline before the air blast pressurization.
The purifier that is used for purification method of high-temperature furnace gas comprises deduster, spill box, sprays tower, Venturi tube, dehydrator and air blast again and link to each other successively; Described Venturi tube is provided with continuous two interconnective one-level Venturi tubes and secondary Venturi tube.
The described tower that sprays again is two, and first sprays tower again connects spill box and one-level Venturi tube respectively; Second sprays tower again connects secondary Venturi tube and dehydrator respectively.
The outlet of described air blast connects one and prevents the non-return water tank that coal gas flows backwards.
Described deduster is a gravitational precipitator, comprises the deduster housing, and housing is provided with air inlet and gas outlet, and the lower end is provided with blowdown apparatus in the housing, the inner walls between described air inlet and the gas outlet be provided with between the upper and lower every the dedusting baffle plate.
Described Venturi tube is provided with the water inlet nozzle that can disperse water spray.
Described nozzle is inverted bowl-type, and the rim of a bowl place establishes disperses plate, the described delivery port that has several to incline and cut to bowl week on the plate of dispersing.
Described nozzle comprises that direct tube section connects the spiral section of lower end.
Described upper end of spraying tower again is provided with spray equipment, and described spray equipment is the nozzle carrier that many inlet channels of longitudinal separation setting connect, and several multiple spraying nozzles are set on the described nozzle carrier, and the multiple spraying nozzle on adjacent two nozzle carriers is crisscross arranged.
Described dehydrator comprises dehydrator shell for keeping off dehydrator again, and air inlet pipe is located at the housing lower end, and the housing upper end is located in the gas outlet, is the gas passage of screw type between described air inlet pipe and the gas outlet.
Beneficial effect of the present invention is:
Multistage cooling dedusting in the purification process has improved the efficient of cooling dedusting, obtain effect preferably, and multistage cooling dedusting is low than the single-stage dedusting to the power requirement of each equipment, so can adopt the comparatively cheap equipment of price in this method, reduces acquisition cost.
Adopt the two-stage Venturi tube to carry out smart dedusting cooling, adopt two-stage to spray tower again to lower the temperature and adopt little backflow and big the backflow again after dedusting, the air blast pressurization steps, all be in order to improve the dedusting cooling efficient of whole device, guarantee that last sintering uses or the gas of burning emptying can not pollute environment, and human body is damaged.
Use gravitational precipitator, and between the upper and lower every the dedusting baffle plate is set, increased number of times and area that high-temperature furnace gas contacts with baffle plate, be beneficial to the gas temperature that reduces high-temperature furnace gas, the dust in the furnace gas is sedimentation gradually under the gravity effect, to reach the effect of dedusting.
Setting can be dispersed the water inlet nozzle of water spray in the Venturi tube, is beneficial to the water of ejection and fully contacts with the high-temperature furnace gas of operation in the same way, improves the efficient of cooling dedusting.
Described spray equipment longitudinal separation of spraying tower again is provided with many inlet channels and connects nozzle carrier, several multiple spraying nozzles are set on the nozzle carrier, multiple spraying nozzle on adjacent two nozzle carriers is crisscross arranged, and can guarantee to carry out in 360 degree the abundant spray of multi-layer multi-angle, improves the cooling efficiency of dust collection.
Adopt and to keep off dehydrator again, and gas passage is arranged to screw type, strengthened the contact area of furnace gas and vias inner walls, prolonged the running time of furnace gas in passage, improved the cooling extent of furnace gas, realized dehydrating effect preferably.
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention.
Fig. 2 is the structural representation of gravitational precipitator.
Fig. 3 is for spraying the structural representation of tower spray equipment again.
Fig. 4 is for spraying the vertical view of tower spray equipment again.
Fig. 5 is the structural representation of Venturi tube.
Fig. 6 is a bowl-type nozzle arrangements schematic diagram.
Fig. 7 is a bowl-type nozzle diverging plate structure schematic diagram.
Fig. 8 is for dispersing plate A-A cross-sectional view.
Fig. 9 is a spirality nozzle arrangements schematic diagram.
Figure 10 is for keeping off the structural representation of dehydrator again.
Among Fig. 2: 1 is the housing of gravitational precipitator; 2 are the dedusting baffle plate; 17 is air inlet; 18 is the gas outlet; 19 is blowdown apparatus;
Among Fig. 3-4,3 for spraying the Tata body again; 4 is water inlet pipe; 5 is nozzle carrier; 6 are multiple spraying nozzle;
Among Fig. 5-9,7 is the water inlet pipe of Venturi tube; 8 is the water inlet nozzle of Venturi tube; 9 for dispersing plate; 10 is delivery port; 11 is direct tube section; 12 is spiral section;
Among Figure 10,13 for keeping off the housing of dehydrator again; 14 is air inlet pipe; 15 is the gas outlet; 16 is gas passage.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further details.
The invention provides a kind of purification method of multistage high-temperature furnace gas, as shown in Figure 1, comprise the steps: that furnace gas removes the thick dedusting cooling of big dust particle, spill box, sprays tower cooling dedusting, the smart dedusting cooling of Venturi tube, dehydrator dehydration, air blast pressurization back sintering again and use or the emptying of burning through deduster.The method of the multistage cooling dedusting of this kind has improved the efficient of cooling dedusting, obtain effect preferably, and multistage cooling dedusting is low than the single-stage dedusting to the power requirement of each equipment, so can adopt the comparatively cheap equipment of price in this method, reduces acquisition cost.
In the smart dedusting cooling step of above-mentioned Venturi tube, can adopt the two-stage Venturi tube to carry out double smart dedusting cooling.
In above-mentioned multiple spray tower cooling dust removal step, also can adopt two-stage to spray tower cooling dedusting again; The first order is located at after the thick dedusting cooling step of spill box, before the smart dedusting cooling of Venturi tube; The second level is located at after the smart dedusting cooling of Venturi tube, before the dehydrator dehydration.
Can adopt little backflow repeatedly to pressurize in the air blast pressurization steps, can also adopt big backflow, proceed the smart dedusting cooling of Venturi tube, dehydrator dehydration, the air blast pressurization steps.But when adopting the smart dedusting of two-stage Venturi tube to lower the temperature, the big backflow arises from after the smart dedusting cooling of one-level Venturi tube, before the secondary Venturi tube essence dedusting cooling.
More than the two-stage Venturi tube of Cai Yonging carries out smart dedusting cooling, two-stage and sprays tower again and lower the temperature and adopt little backflow and big the backflow again after dedusting, the air blast pressurization steps, all be in order to improve the dedusting cooling efficient of whole device, guarantee that last sintering uses or the gas of burning emptying can not pollute environment, and human body is damaged.Can adopt coal gas to carry out sintering in the sintering step.
Another program of the present invention is the purifier that adopts at multistage purification method of high-temperature furnace gas, comprises deduster, spill box, sprays tower, Venturi tube, dehydrator and air blast again and link to each other successively.
As shown in Figure 2, what deduster adopted is gravitational precipitator, comprise deduster housing 1, housing 1 is provided with air inlet 17 and gas outlet 18, and the lower end is provided with blowdown apparatus 19 in the housing, housing 1 inwall between air inlet 17 and the gas outlet 18 be provided with between the upper and lower every dedusting baffle plate 2, this is provided with in order to increase number of times and the area that high-temperature furnace gas contacts with baffle plate 2, be beneficial to the gas temperature that reduces high-temperature furnace gas, the dust in the furnace gas is sedimentation gradually under the gravity effect, to reach the effect of dedusting.
According to the difference that the cooling dedusting requires, Venturi tube can be provided with continuous two, and is provided with the water inlet nozzle 8 (Fig. 5) that can disperse water spray in the Venturi tube, is beneficial to the water that sprays and fully contacts with the high-temperature furnace gas of operation in the same way, improves the efficient of cooling dedusting.For realizing above-mentioned functions, the invention provides following two kinds of concrete structures:
The nozzle of the inversion bowl-type shown in Fig. 6-8, the rim of a bowl place establishes disperses plate 9, and dispersing has several delivery ports of cutting sth. askew 10 on the plate 9, and delivery port 10 is all dispersed to bowl week from the center of circle and cut sth. askew.When water when water inlet pipe 7 outwards sprays by nozzle, disperse the delivery port 10 of cutting sth. askew on the plate 9 and can guide water to disperse to bowl week, increased water outlet and the contact area of moving high-temperature furnace gas in the same way, strengthened the effect of cooling dedusting.
The nozzle that comprises direct tube section 11 and spiral section 12 as shown in Figure 9,11 1 ends of direct tube section connect the termination of water inlet pipe 7, and the other end is connected with spiral section 12.When water when water inlet pipe 7 sprays downwards by nozzle, water in dropping process, utilize spiral section 12 disperse shape to around disperse water spray, increased water outlet and the contact area of moving high-temperature furnace gas in the same way equally, strengthened the effect of cooling dedusting.
Equally, according to the difference that the cooling dedusting requires, spray tower again and also can be provided with two, first sprays tower again connects the spill box and first Venturi tube respectively; Second sprays tower again connects second Venturi tube and dehydrator respectively.The upper end of spraying tower again is provided with spray equipment, as shown in Figure 3-4, many the water inlet pipes 4 of longitudinal separation setting pass tower body 3 and connect nozzle carrier 5, several multiple spraying nozzles 6 are set on the nozzle carrier 5, multiple spraying nozzle 6 on adjacent two nozzle carriers 5 is crisscross arranged, this kind setting can guarantee to carry out the abundant spray of multi-layer multi-angle in 360 degree, improve the cooling efficiency of dust collection.
As shown in figure 10, what dehydrator adopted is multiple retaining dehydrator, comprises dehydrator shell 13, and air inlet pipe 14 is located at housing 12 lower ends, and housing 12 upper ends are located in gas outlet 15, are the gas passage 16 of screw type between air inlet pipe 14 and the gas outlet 15.The design of the screw type of gas passage 16 has strengthened the contact area of furnace gas and passage 16 inwalls, has prolonged the running time of furnace gas in passage 16, has improved the cooling extent of furnace gas, has realized dehydrating effect preferably.
When adopting the coal gas sintering to use in the tail gas, need connect one in the outlet of air blast and prevent the non-return water tank that coal gas flows backwards.
Claims (14)
1. purification method of high-temperature furnace gas, described purification method comprises the steps: that furnace gas removes big dust particle, the thick dedusting cooling of spill box, sprays tower cooling dedusting, the smart dedusting cooling of Venturi tube, dehydrator dehydration and air blast pressurization again through deduster successively, and sintering uses or burning emptying afterwards.
2. purification method of high-temperature furnace gas according to claim 1 is characterized in that adopting in the smart dedusting cooling step of Venturi tube interconnective one-level Venturi tube and secondary Venturi tube to carry out double smart dedusting cooling; After the described air blast pressurization steps furnace gas continue is adopted big backflow pressurized operation, the furnace gas of this big backflow after with the Roots blower pressurization be back to after the smart dedusting cooling of one-level Venturi tube, in the pipeline before the smart dedusting cooling of secondary Venturi tube.
3. purification method of high-temperature furnace gas according to claim 1 is characterized in that adopting two-stage to spray tower cooling dedusting again in the multiple spray tower cooling dust removal step; The first order is located at after the thick dedusting cooling step of spill box, before the smart dedusting cooling of Venturi tube; The second level is located at after the smart dedusting cooling of Venturi tube, before the dehydrator dehydration.
4. purification method of high-temperature furnace gas according to claim 1 is characterized in that adopting in the described sintering step coal gas to carry out sintering.
5. purification method of high-temperature furnace gas according to claim 1, it is characterized in that adopting in the described air blast pressurization steps little backflow repeatedly to pressurize, furnace gas after Roots blower is pressurizeed in this little backflow is back to after the dehydrator dehydration, in the pipeline before the air blast pressurization.
6. the purifier that is used for the described purification method of high-temperature furnace gas of claim 1 is characterized in that comprising deduster, spill box, sprays tower, Venturi tube, dehydrator and air blast again and link to each other successively; Described Venturi tube is provided with continuous two interconnective one-level Venturi tubes and secondary Venturi tube.
7. purifier according to claim 6 is characterized in that the described tower that sprays again is two, and first sprays tower again connects spill box and one-level Venturi tube respectively; Second sprays tower again connects secondary Venturi tube and dehydrator respectively.
8. purifier according to claim 6 is characterized in that the outlet connection one of described air blast prevents the non-return water tank that coal gas flows backwards.
9. purifier according to claim 6, it is characterized in that described deduster is a gravitational precipitator, comprise the deduster housing, housing is provided with air inlet and gas outlet, the lower end is provided with blowdown apparatus in the housing, the inner walls between described air inlet and the gas outlet be provided with between the upper and lower every the dedusting baffle plate.
10. purifier according to claim 6 is characterized in that described Venturi tube is provided with the water inlet nozzle that can disperse water spray.
11. purifier according to claim 10 is characterized in that described nozzle is inverted bowl-type, the rim of a bowl place establishes disperses plate, the described delivery port that has several to incline and cut to bowl week on the plate of dispersing.
12. purifier according to claim 10 is characterized in that described nozzle comprises that direct tube section connects the spiral section of lower end.
13. according to claim 6 or 7 described purifiers, it is characterized in that described upper end of spraying tower again is provided with spray equipment, described spray equipment is the nozzle carrier that many inlet channels of longitudinal separation setting connect, several multiple spraying nozzles are set on the described nozzle carrier, and the multiple spraying nozzle on adjacent two nozzle carriers is crisscross arranged.
14. purifier according to claim 6 is characterized in that described dehydrator for keeping off dehydrator again, comprises dehydrator shell, air inlet pipe is located at the housing lower end, and the housing upper end is located in the gas outlet, is the gas passage of screw type between described air inlet pipe and the gas outlet.
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| CN 201010108781 CN101822927B (en) | 2010-02-04 | 2010-02-04 | Purification method of high-temperature furnace gas and purification device thereof |
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| CN 201010108781 CN101822927B (en) | 2010-02-04 | 2010-02-04 | Purification method of high-temperature furnace gas and purification device thereof |
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| CN101822927A CN101822927A (en) | 2010-09-08 |
| CN101822927B true CN101822927B (en) | 2013-07-31 |
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| CN104548819A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Efficient washing device and method of catalyst in reaction gas |
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Denomination of invention: Purification method of high-temperature furnace gas and purification device thereof Effective date of registration: 20151124 Granted publication date: 20130731 Pledgee: Hefei Xingtai financing Company limited by guarantee Pledgor: Anhui YuanChen Environmental Protention Science and Technology Co., Ltd. Registration number: 2015990001033 |
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Address after: 230011, Anhui, Hefei victory road and Langya mountain intersection, blue whale International Building Patentee after: ANHUI YUANCHEN ENVIRONMENT PROTECTION TECHNOLOGY CO., LTD. Address before: 230011, Anhui, Hefei victory road and Langya mountain intersection, blue whale International Building Patentee before: Anhui YuanChen Environmental Protention Science and Technology Co., Ltd. |
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