CN208927922U - A kind of coke oven flue gas desulphurization denitration dust-extraction unit - Google Patents
A kind of coke oven flue gas desulphurization denitration dust-extraction unit Download PDFInfo
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- CN208927922U CN208927922U CN201821721409.2U CN201821721409U CN208927922U CN 208927922 U CN208927922 U CN 208927922U CN 201821721409 U CN201821721409 U CN 201821721409U CN 208927922 U CN208927922 U CN 208927922U
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- tower
- flue gas
- desulphurization denitration
- coke oven
- extraction unit
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Abstract
The utility model discloses a kind of coke oven flue gas desulphurization denitration dust-extraction units, it is related to the environmental technology field of gas cleaning and the utilization of resources, including waste-heat recovery device, desulfurization oxidizing tower, absorption tower, alkali source storage tank, oxidant tank and slurry circulation case, desulfurization oxidizing tower includes the desulfurizing tower being equipped with from top to bottom for the oxidizing tower of antioxidant nitroxide and for desulfurization, waste-heat recovery device is connected to desulfurizing tower, oxidizing tower is connected to absorption tower, absorption tower is used for denitration, alkali source storage tank respectively with desulfurizing tower, absorption tower connection, oxidant tank is connected to slurry circulation case, slurry circulation case is connected to oxidizing tower.Nitre-absorption nitre desulfurization denitration method is converted using desulfurization-oxidizing process, improve the efficiency of desulphurization denitration dedusting, reduce the consumption of oxidant, reduce the cost of desulphurization denitration dedusting, it is not required to be influenced by dust, sulfur dioxide concentration, even if having coke-stove gas string leakage, a small amount of tar, excess sulfur dioxide desulphurization denitration will not be impacted.
Description
Technical field
The utility model relates to the environmental technology field of gas cleaning and the utilization of resources, in particular to a kind of coke oven flue gas is de-
Sulphur denitration dust collecting device.
Background technique
By environmental requirement and local requirements, coke oven flue gas (flue gas) requires sulfur dioxide, nitrogen oxides, dust needs to reach
Mark discharge.There are two types of the prior arts that sulfur dioxide, nitrogen oxides, dust in flue gas are handled simultaneously, and one is ultralow
Warm SCR desulphurization denitration dust removal method, another kind are desulfurization-oxidizing process conversion nitre-absorption nitre desulfurization denitration methods.In the market
SCR desulphurization denitration dust removal method has particular/special requirement to sulfur dioxide, temperature, under normal conditions temperature will between 280~420 DEG C it
Between, sulfur dioxide entrance concentration is not higher than 250mg/Nm3, soot dust granule object entrance concentration will also be lower than 1000mg/Nm3If dioxy
It is higher to change sulphur entrance concentration, is easy to cause SCR catalyst to be poisoned, i.e. catalyst failure, the dust content in flue gas is excessively high to be easy
Catalyst blockage phenomenon occurs, has tar when coke furnace carbonization chamber and combustion chamber string leakage, can also be easy to happen catalyst blockage
Phenomenon causes flue gas desulfurization denitration dust-removing effect to decline or inactivate.In SCR desulphurization denitration dust removal method, oxidant consumption amount compared with
Greatly, the cost of desulphurization denitration dedusting is improved.
Utility model content
For disadvantages described above, the purpose of the utility model is to provide a kind of coke oven flue gas desulphurization denitration dust-extraction units, use
Desulfurization-oxidizing process converts nitre-absorption nitre desulfurization denitration method, saves the unnecessary oxidant consumption of sweetening process, not by
Dust, sulfur dioxide concentration require influence, even if having coke-stove gas string leakage, a small amount of tar, excess sulfur dioxide will not
Desulphurization denitration is impacted.The efficiency of desulphurization denitration dedusting is improved, the cost of desulphurization denitration dedusting is reduced.
To achieve the goals above, the technical solution of the utility model is:
A kind of coke oven flue gas desulphurization denitration dust-extraction unit, including waste-heat recovery device, desulfurization oxidizing tower, absorption tower, alkali source
Storage tank, oxidant tank and slurry circulation case, the desulfurization oxidizing tower include being equipped with from top to bottom for antioxidant nitroxide
Oxidizing tower and desulfurizing tower for desulfurization, the waste-heat recovery device are connected to the desulfurizing tower, the oxidizing tower and the suction
Tower connection is received, the absorption tower is used for denitration, and the alkali source storage tank is connected to the desulfurizing tower, the absorption tower respectively, described
Oxidant tank is connected to the slurry circulation case, and the slurry circulation case is connected to the oxidizing tower.
Preferably, booster fan is equipped between the waste-heat recovery device and the desulfurizing tower.
Preferably, coke oven flue gas desulphurization denitration dust-extraction unit further includes process water pond, the process water pond and the absorption
The top of tower is connected to, and mist eliminator flushing water pump is equipped between the process water pond and the absorption tower.
Preferably, the desulfurizing tower is equipped with first passage, and the both ends of the first passage are connected to the desulfurizing tower, described
First passage is equipped with desulfuration recycle pump.
Preferably, the slurry circulation case and the oxidizing tower are equipped with second channel, and it is de- that the second channel is equipped with first
Nitre circulating pump.
Preferably, the absorption tower is equipped with third channel, the both ends of the third channel and the absorption tower connection, described
Third channel is equipped with the second denitration circulating pump.
Preferably, lye pump is equipped between the alkali source storage tank and the desulfurizing tower.
Preferably, oxidant pump is equipped between the oxidant tank and the slurry circulation case.
Preferably, baffle plate is equipped in the upper end on the absorption tower and/or catch mist layer.
After above-mentioned technical proposal, the beneficial effects of the utility model are:
Since the utility model coke oven flue gas desulphurization denitration dust-extraction unit includes waste-heat recovery device, desulfurization oxidizing tower, inhales
Tower, alkali source storage tank, oxidant tank and slurry circulation case are received, desulfurization oxidizing tower includes being equipped with from top to bottom for aoxidizing nitrogen oxidation
The oxidizing tower of object and desulfurizing tower for desulfurization, waste-heat recovery device are connected to desulfurizing tower, and oxidizing tower is connected to absorption tower, are absorbed
Tower is used for denitration, and alkali source storage tank is connected to desulfurizing tower, absorption tower respectively, and oxidant tank is connected to slurry circulation case, serum recycle
Case is connected to oxidizing tower.Lye in alkali source storage tank is transported in desulfurizing tower, the cigarette containing sulfur dioxide, nitrogen oxides and dust
Gas is also passed into desulfurizing tower, and the sulfur dioxide in lye and flue gas in desulfurizing tower carries out desulfurization by chemical reaction.Oxidant
Store oxidant in tank, oxidant is connect by oxidant pump with slurry circulation case, and slurry circulation case is conveyed into oxidizing tower
Oxidant, the nitrogen oxides in oxidizing tower is sufficiently reacted with oxidant makes nitrogen become high-valence state nitrogen, it is easier to pass through
Alkali source carries out denitration.Due to first carrying out sulfur removal technology, so saving the consumption of unnecessary oxidant in sweetening process.Pass through
Oxidizing nitrogen oxides is transported to absorption tower, and the lye in alkali source storage tank is transported in absorption tower, and lye is on absorption tower
In sufficiently reacted with the nitrogen oxides of high-valence state nitrogen, further improve denitration efficiency.Having for coke oven chimney is higher
The exhaust gas of temperature passes through waste-heat recovery device, and waste-heat recovery device reuses the heat being collected into, and reducing need not
The waste wanted reduces the cost of desulphurization denitration dedusting.
It is taken off in conclusion the utility model coke oven flue gas desulphurization denitration dust-extraction unit solves SCR desulfurization in the prior art
To temperature, dust concentration, the limitation of sulfur dioxide concentration in nitre dust removal method, solve the problems, such as that oxidant consumption is serious；This
Utility model coke oven flue gas desulphurization denitration dust-extraction unit saves the unnecessary oxidant consumption of sweetening process, not by dust, two
Sulfur oxide concentration requires to influence, even if there is the leakage of coke-stove gas string, a small amount of tar, excess sulfur dioxide will not be de- to desulfurization
Nitre impacts.The efficiency for improving desulphurization denitration dedusting reduces the cost of desulphurization denitration dedusting.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of coke oven flue gas desulphurization denitration dust-extraction unit of the utility model；
In figure: 1. desulfurization oxidizing towers, 11. desulfurizing towers, 12 oxidizing towers, 111. desulfuration recycle pumps, 121. first denitrations circulation
Pump, 2. absorption towers, 21. second denitration circulating pumps, 3. oxidant tanks, 31. oxidant pumps, 4. slurry circulation cases, 5. alkali source storage tanks,
51. alkali source circulating pump, 6. concrete chimneys, 7. waste-heat recovery devices, 8. booster fans, 9. process water ponds, 91. mist eliminator flushings
Water pump, 10. process water water replanishing devices.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.
As shown in Figure 1, a kind of coke oven flue gas desulphurization denitration dust-extraction unit, including waste-heat recovery device 7, desulfurization oxidizing tower 1,
Absorption tower 2, alkali source storage tank 5, oxidant tank 3 and slurry circulation case 4, desulfurization oxidizing tower 1 include being equipped with to be used for oxygen from top to bottom
Change the oxidizing tower 12 of nitrogen oxides and the desulfurizing tower 11 for desulfurization, the exhaust fumes of concrete chimney pass through waste-heat recovery device
7, booster fan 8 is transported in desulfurizing tower 11, and during this, waste-heat recovery device 7 reuses the heat being collected into,
Reduce unnecessary waste, the heat for fully absorbing exhaust gas carries out desulphurization denitration dust removal process again.
Lye in alkali source storage tank 5 is transported in desulfurizing tower 11 by lye pump 51, containing sulfur dioxide, nitrogen oxides and
The flue gas of dust is also passed into desulfurizing tower 11, and the sulfur dioxide in lye and flue gas in desulfurizing tower 11 is carried out by chemical reaction
Desulfurization, desulfurizing tower 11 are equipped with first passage, and the first passage of the present embodiment has two, the both ends of every first passage and desulfurizing tower
11 connections, every first passage are equipped with a desulfuration recycle pump 111, and the lye of 11 lower end of desulfurizing tower passes through desulfuration recycle pump 111
11 upper end of sequentially-fed desulfurizing tower from the bottom to top is sprayed, and the lye of spray is sufficiently anti-with sulfur dioxide in desulfurizing tower 11
It answers, further improves desulfuration efficiency.
Flue gas after 11 desulfurization of desulfurizing tower enters oxidizing tower 12, and oxidant is store in oxidant tank 3, and oxidant is logical
Peroxide agent pump 31 is connect with slurry circulation case 4 by pipeline, and oxidant pump 31 is communicated with slurry circulation case 4 in the present embodiment
Three pipelines, every pipeline are equipped with a first denitration circulating pump 121, and slurry circulation case 4 passes through the first denitration circulating pump 121
Oxidant is conveyed to the upper end of oxidizing tower 12, the nitrogen oxides in oxidizing tower 12 is sufficiently reacted with oxidant makes nitrogen become height
Valence state nitrogen, it is easier to denitration be carried out by alkali source, 12 lower end of oxidizing tower is connected to slurry circulation case 4 by pipeline will oxidation
The oxidant of tower 12 is transmitted back in slurry circulation case 4.
It is transported to absorption tower 2 by oxidizing nitrogen oxides, the lye in alkali source storage tank 5 is defeated by lye pump 51
It being sent in absorption tower 2, absorption tower 2 is equipped with second channel, and the second pipe in the present embodiment is three, and the two of every second channel
End be connected to absorption tower 2, and equipped with a second denitration circulating pump 21, the lye of 2 lower end of absorption tower passes through for every second channel
The sequentially-fed lye upper end of two denitration circulating pumps 21 from the bottom to top is sprayed, the lye of spray in absorption tower 2 with have
The nitrogen oxides of high-valence state nitrogen sufficiently reacts, and further improves denitration efficiency.
A kind of coke oven flue gas desulphurization denitration dust-extraction unit of the present embodiment further includes process water pond 9, process water pond 9 and absorption
The top of tower 2 is connected to, and mist eliminator flushing water pump 91 is equipped between process water pond 9 and absorption tower 2, and mist eliminator flushing water pump 91 is used for
Remove the mist of process water.
In the present embodiment, the upper end on absorption tower 2 is equipped with baffle plate and/or catches mist layer, is used for behind absorption tower 2 in flue gas
Mist.
The coke oven flue gas desulphurization denitration dust-extraction unit of the present embodiment is saved compared with SCR catalytic desulfurization and denitrification dust-extraction unit
Sweetening process unnecessary oxidant consumption.
The coke oven flue gas desulphurization denitration dust-extraction unit of the present embodiment is not influenced by temperature requirement, can sufficiently absorb flue gas in advance
In thermal energy after denitration again.
The coke oven flue gas desulphurization denitration dust-extraction unit of the present embodiment is not influenced by dust, sulfur dioxide concentration requirement, even if
Have coke-stove gas string leakage, a small amount of tar, excess sulfur dioxide desulphurization denitration will not be impacted.
The coke oven flue gas desulphurization denitration dust-extraction unit of the present embodiment is not necessarily to consider that the service life of SCR reduction denitrfying agent is asked
Topic, does not need to carry out the work such as inspection catalyst, more catalyst changeout, reduces operating cost.
The utility model is not limited to above-mentioned specific embodiment, and those skilled in the art visualize from above-mentioned
Hair, without creative labor, the various transformation made are all fallen within the protection scope of the utility model.
Claims (9)
1. a kind of coke oven flue gas desulphurization denitration dust-extraction unit, which is characterized in that including waste-heat recovery device, desulfurization oxidizing tower, inhale
Tower, alkali source storage tank, oxidant tank and slurry circulation case are received, the desulfurization oxidizing tower includes being equipped with to be used for nitrogen oxide from top to bottom
The oxidizing tower of oxide and desulfurizing tower for desulfurization, the waste-heat recovery device are connected to the desulfurizing tower, the oxidizing tower
It is connected to the absorption tower, the absorption tower is used for denitration, and the alkali source storage tank connects with the desulfurizing tower, the absorption tower respectively
Logical, the oxidant tank is connected to the slurry circulation case, and the slurry circulation case is connected to the oxidizing tower.
2. a kind of coke oven flue gas desulphurization denitration dust-extraction unit as described in claim 1, which is characterized in that the waste heat recycling dress
It sets and is equipped with booster fan between the desulfurizing tower.
3. a kind of coke oven flue gas desulphurization denitration dust-extraction unit as described in claim 1, which is characterized in that further include process water
Pond, the process water pond are connected to the top on the absorption tower, and demister is equipped between the process water pond and the absorption tower
Flush water pump.
4. a kind of coke oven flue gas desulphurization denitration dust-extraction unit as described in claim 1, which is characterized in that the desulfurizing tower is equipped with
First passage, the both ends of the first passage are connected to the desulfurizing tower, and the first passage is equipped with desulfuration recycle pump.
5. a kind of coke oven flue gas desulphurization denitration dust-extraction unit as described in claim 1, which is characterized in that the slurry circulation case
It is equipped with second channel with the oxidizing tower, the second channel is equipped with the first denitration circulating pump.
6. a kind of coke oven flue gas desulphurization denitration dust-extraction unit as described in claim 1, which is characterized in that the absorption tower is equipped with
Third channel, the both ends of the third channel and the absorption tower connection, the third channel are equipped with the second denitration circulating pump.
7. a kind of coke oven flue gas desulphurization denitration dust-extraction unit as described in claim 1, which is characterized in that the alkali source storage tank with
Lye pump is equipped between the desulfurizing tower.
8. a kind of coke oven flue gas desulphurization denitration dust-extraction unit as described in claim 1, which is characterized in that the oxidant tank with
Oxidant pump is equipped between the slurry circulation case.
9. a kind of coke oven flue gas desulphurization denitration dust-extraction unit as described in claim 1, which is characterized in that on the absorption tower
Upper end is equipped with baffle plate and/or catches mist layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821721409.2U CN208927922U (en) | 2018-10-23 | 2018-10-23 | A kind of coke oven flue gas desulphurization denitration dust-extraction unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821721409.2U CN208927922U (en) | 2018-10-23 | 2018-10-23 | A kind of coke oven flue gas desulphurization denitration dust-extraction unit |
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| CN208927922U true CN208927922U (en) | 2019-06-04 |
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| CN201821721409.2U Active CN208927922U (en) | 2018-10-23 | 2018-10-23 | A kind of coke oven flue gas desulphurization denitration dust-extraction unit |
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| CN (1) | CN208927922U (en) |
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- 2018-10-23 CN CN201821721409.2U patent/CN208927922U/en active Active
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