CN109621571A - A kind of NID sulfur removal technology and the bag filter for the sulfur removal technology - Google Patents
A kind of NID sulfur removal technology and the bag filter for the sulfur removal technology Download PDFInfo
- Publication number
- CN109621571A CN109621571A CN201710929710.6A CN201710929710A CN109621571A CN 109621571 A CN109621571 A CN 109621571A CN 201710929710 A CN201710929710 A CN 201710929710A CN 109621571 A CN109621571 A CN 109621571A
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- China
- Prior art keywords
- flue gas
- bag filter
- sulfur removal
- removal technology
- bag
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- 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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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4263—Means for active heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of NID sulfur removal technology and for the bag filter of the sulfur removal technology, its key points of the technical solution are that: include the following steps: step 1: adding water to be digested to calcium dioxide in digester quick lime；Step 2: the dust collected in the calcium dioxide and bag filter in digester is mixed in mixer, water is added to be humidified to form combination ash；Step 3: the combination ash after humidification carries out desulphurization reaction with the flue gas in boiler in reactor；Step 4: the flue gas in mixer after desulphurization reaction, which returns to, recycles cleaning in bag filter, second step and third step are repeated；Preheating step is added in the smoke inlet that flue gas enters bag filter before.Step 5: transport to grey library stores after the flue gas in mixer completes desulphurization reaction.It is an advantage of the invention that a possibility that reducing flue gas when importing progress circular treatment in bag filter to flue gas and filter bag surface caused to block, " paste bag " occurs.
Description
Technical field
The present invention relates to industrially desulfurized fields, and in particular to a kind of NID sulfur removal technology and the cloth bag for the sulfur removal technology
Deduster.
Background technique
With the development of industry and the improvement of people's living standards, the craving of the energy is also continuously increased, in coal-fired flue-gas
SO2 the main reason for having become atmosphere pollution.Reduce that SO2 pollution has become that current atmospheric environment administers when business
It is anxious.Many flue gas desulfurization techniques are widely applied in the industry, especially NID sulfur removal technology, since investment is low, conveniently may be used for it
The advantages that row, the deep favor by the producer.
The principle of NID sulfur removal technology is that work is added in quick lime in digester first using quick lime as desulfurizing agent
Skill water is digested to calcium hydroxide powder, and a large amount of circulating ash under then these calcium hydroxide powders and bag filter remove is in mixer
In mix, and add water humidification, make the water content of combination ash from 1% humidification to 5% or so, then using fluidized wind as power by
Guide plate enters straight flue reactor.Flue gas in boiler also enters in reactor, contacts with combination ash, is carried out using combination ash
Reaction.Due to having very big evaporating surface in reactor, quickly, flue gas relative humidity increases to 40% to moisture evaporation quickly
To 50%, and flue-gas temperature is also cooled to 75 °C or so from 166 °C or so, forms preferable Desulfurization, to remove in flue gas
Sour gas molecule, the final product Desulphurization such as sulfur dioxide then sent by Pneumatic conveyer to grey library.
Flue gas in reactor, which can be transported in bag filter, carries out circulation cleaning, passes through bag filter, flue gas
The dust of middle larger particles can be fallen in ash bucket, be mixed into mixer, and lesser dust granule is at the top of bag filter
Purification air outlet discharge.
It is needed in mixer plus water is humidified to combination ash, the reaction of desulfurization then could be carried out in reactor,
Flue gas relative humidity after reaction reaches 40% to 50%.And when carrying out circular treatment in flue gas guiding bag filter, flue gas
Still larger humidity can be had, is caused after entering in bag filter, flue gas easily adheres to filter bag surface, causes filter bag table
There is the phenomenon that " paste bag " in face blocking.
Summary of the invention
The first object of the present invention is to provide a kind of NID sulfur removal technology, its advantage is that importing bag filter to flue gas
A possibility that when interior progress circular treatment, reducing flue gas and filter bag surface caused to block, " paste bag " occurs.
Above-mentioned technical purpose of the invention has the technical scheme that a kind of NID sulfur removal technology, including
Following steps:
Step 1: adding water to be digested to calcium dioxide in digester quick lime；
Step 2: the dust collected in the calcium dioxide and bag filter in digester is mixed in mixer,
Water is added to be humidified to form combination ash；
Step 3: the combination ash after humidification carries out desulphurization reaction with the flue gas in boiler in reactor；
Step 4: the flue gas in mixer after desulphurization reaction, which returns to, recycles cleaning in bag filter, second step and third are repeated
Step；
Step 5: transport to grey library stores after the flue gas in mixer completes desulphurization reaction.
Preheating step is added before the smoke inlet that the 4th step flue gas enters bag filter.
Through the above technical solutions, flue gas enters cloth bag and removes since the smoke moisture after reacting in reactor is larger
Preheating step is added before the smoke inlet of dirt device, flue gas can be dried, reduce its humidity, thus flue gas into
It is not susceptible to condense when entering in bag filter, reduces a possibility that fume gas condensation causes filter bag blocking, paste bag, increase filter
The service life and dust removing effects of bag.
The present invention is further arranged to: the preheating step carries out at the smoke inlet of bag filter.
Through the above technical solutions, carrying out pre-add heat treatment at the smoke inlet of bag filter, pre-add can reduce
The occupied space of heat, need not increase desulphurization system by new equipment, saves cost.
The present invention is further arranged to: the preheating step is carried out by electrically heated mode.
Through the above technical solutions, due to being heated to flue gas, it is not suitable enough using heating methods such as hot wind, water-baths
It closes, and electrically heated mode, convenient for control temperature, heating is very fast, can heat to flue gas stream rapidly.
The present invention is further arranged to: the preheating temperature control is at 80 °C or more.
Through the above technical solutions, since the flue-gas temperature after reactor is reduced to 75 °C or so, preheating
Temperature must control and can be only achieved the effect that flue gas is dried rapidly at 80 ° or more.
The second object of the present invention is to provide a kind of bag filter, and the smoke inlet of the bag filter lower end is external
There is the pre-add passage of heat made of heat-transfer matcrial.
Through the above technical solutions, the pre-add passage of heat made of heat-transfer matcrial can be to the flue gas before entrance smoke inlet
Air-flow carries out pre-add heat treatment, reduces its humidity, reduces a possibility that paste bag occurs after entering bag filter.
The present invention is further arranged to: the inner wall of the pre-add passage of heat is equipped with interlayer, and the interlayer inside spin is fixed with
Electric heating wire.
Through the above technical solutions, electric heating wire can relatively quickly heat up, accelerate the drying to flue gas stream.
The present invention is further arranged to: the inner wall posts heat-transfer film.
Through the above technical solutions, the heating conduction of inner wall can be enhanced in heat-transfer film, allow the temperature of electric heating wire compared with
It is transmitted to well in pre-add heat pipeline.
The present invention is further arranged to: guide pipe is equipped between the pre-add passage of heat and the smoke inlet, it is described to lead
It is gradually reduced to the direction of caliber towards the smoke inlet of pipe.
Through the above technical solutions, flue gas, which has been gradually reduced, in guide pipe enters the area of passage before smoke inlet, delay
Flue gas enters the time of bag filter, rests on flue gas for longer periods in the pre-add passage of heat, logical by preheating
The heating in road increases drying time, enhances drying effect.
The present invention is further arranged to: the guiding inside pipe wall is equipped with several unhurried current pieces for delaying air-flow, the unhurried current piece
One end and the guiding inside pipe wall are hinged, and the other end is free end.
Through the above technical solutions, unhurried current piece can stop flue gas stream, further delay the flow velocity of flue gas, increases
Add heated time.Simultaneously by can rotate after the impact of flue gas stream, flue gas stream is allowed to pass through, be unlikely to by
To excessive obstruction.
The present invention is further arranged to: the guide pipe is made of sound-absorbing material.
Through the above technical solutions, certain noise, sound absorber can be generated during being collided with flue gas stream
Guide pipe made of expecting can reduce noise.
In conclusion the invention has the following advantages:
1, preheating step is added in the smoke inlet that flue gas enters bag filter before, flue gas can be dried,
Its humidity is reduced, to be not susceptible to condense when flue gas enters in bag filter, fume gas condensation is reduced and causes filter bag stifled
A possibility that plug, paste bag, increase the service life and dust removing effects of filter bag；
2, guide pipe and unhurried current piece can delay the speed of flue gas stream, increase flue gas by the time of heated drying, enhance dry effect
Fruit.
Detailed description of the invention
Fig. 1 is the flow chart of sulfur removal technology in embodiment 1；
Fig. 2 is the schematic diagram that bag filter structure is embodied in embodiment 1；
Fig. 3 is the schematic diagram that preheating channel design is embodied in embodiment 1；
Fig. 4 is the schematic diagram that preheating channel design is embodied in embodiment 2；
Fig. 5 is the schematic diagram that preheating channel design is embodied in embodiment 3；
Fig. 6 is the schematic diagram that preheating channel design is embodied in embodiment 4.
In figure, 1, digester；2, mixer；3, reactor；4, Hui Ku；5, bag filter；51, cabinet；52, flue gas enters
Mouthful；53, the pre-add passage of heat；531, interlayer；532, electric heating wire；533, heat-transfer film；54, guide pipe；55, flow slowly piece；6, boiler.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment: a kind of NID sulfur removal technology and the bag filter for the sulfur removal technology, as shown in Figure 1, NID desulfurization
Technique includes the following steps:
Step 1: adding water to be digested to calcium dioxide in digester 1 quick lime；
Step 2: the dust collected in the calcium dioxide and bag filter 5 in digester 1 is mixed in mixer 2
It closes, water is added to be humidified to form combination ash；
Step 3: the combination ash after humidification carries out desulphurization reaction with the flue gas in boiler 6 in reactor 3；
Step 4: the flue gas in mixer 2 after desulphurization reaction, which returns to, recycles cleaning in bag filter 5, second step and the are repeated
Three steps；The smoke inlet 52 that flue gas enters bag filter 5 carries out pre-add heat treatment before, specifically, flue gas is in cloth bag
It is preheated at the smoke inlet 52 of deduster 5；
Step 5: transport to grey library 4 stores after the flue gas in mixer 2 completes desulphurization reaction.
Bag filter 5 used in this sulfur removal technology, as shown in Figures 2 and 3, including the cabinet 51 being vertically arranged, cabinet
51 lower end is equipped with the smoke inlet 52 entered for flue gas, and smoke inlet 52 is circumscribed with heat-transfer matcrial pre-add as made of copper or aluminium
The inner wall of the passage of heat 53, the pre-add passage of heat 53 is equipped with hollow interlayer 531, and 531 inside spin of interlayer is provided with electric heating wire 532,
532 external power supply of electric heating wire.It can use electric heating wire 532 after energization to heat the inner wall of the pre-add passage of heat 53, and
And inner wall posts heat-transfer film 533, reinforces the heat transfer of inner wall, enhances heating effect.
By being heated to the flue gas before entering smoke inlet 52, its humidity is reduced, reduces and enters bag filter 5
A possibility that " paste bag " occurs afterwards.Since the flue-gas temperature after reactor 3 is reduced to 75 °C or so, preheating
Temperature must be controlled at 80 ° or more, to achieve the effect that flue gas is dried.
Embodiment 2: a kind of NID sulfur removal technology and the bag filter for the sulfur removal technology, difference from Example 1
It is, as shown in figure 4, be connected with guide pipe 54 between the pre-add passage of heat 53 and smoke inlet 52, the caliber of guide pipe 54 is towards cigarette
The direction of gas entrance 52 is gradually reduced.Guide pipe 54 has been gradually reduced flue gas and has entered the area of passage before smoke inlet 52, delays
Flue gas enters the time of bag filter 5, rests on flue gas for longer periods in the pre-add passage of heat 53, by pre-add
The heating of the passage of heat 53 increases drying time, enhances drying effect.
Embodiment 3: a kind of NID sulfur removal technology and the bag filter for the sulfur removal technology, difference from Example 2
It is, as shown in figure 5, guide pipe 54 can also be fixed in the pre-add passage of heat 53, to reduce the length of total, contracts
Small occupied space.
Embodiment 4: a kind of NID sulfur removal technology and the bag filter for the sulfur removal technology, difference from Example 2
It is, as shown in fig. 6, being equipped with several unhurried current pieces 55 for delaying air-flow in 54 inner wall of guide pipe, the piece 55 that flows slowly is by sound-absorbing material system
At unhurried current piece 55 is arranged around the inner wall of guide pipe 54, and unhurried current 55 one end of piece and 54 inner wall of guide pipe are hinged, and the other end is freely
End.Unhurried current piece 55 can stop flue gas stream, further delay the flow velocity of flue gas, increase heated time.While by
It can rotate after the impact of flue gas stream, allow flue gas stream to pass through, be unlikely to by more obstructions.
During being collided with flue gas stream, certain noise can be generated, guide pipe 54 made of sound-absorbing material
Noise can be reduced.
The course of work: it after the combination ash after humidification carries out desulphurization reaction with the flue gas in boiler 6 in reactor 3, is formed
Flue gas import bag filter 5 in carry out circulation cleaning, initially enter and preheated in the pre-add passage of heat 53, reduce flue gas
Humidity, then by guide pipe 54 flow into bag filter 5 smoke inlet 52, be dusted.Due to entering bag-type dust
The humidity of flue gas reduces in device 5, it is not easy to and it coagulates, reduces to a possibility that filter bag results in blockage in bag filter 5,
To the service life of the filter bag improved.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
1. a kind of NID sulfur removal technology, includes the following steps:
Step 1: quick lime is digested to calcium dioxide in digester (1) Nei Jiashui；
Step 2: by the dust collected in the calcium dioxide and bag filter (5) in digester (1) in mixer (2)
It is mixed, water is added to be humidified to form combination ash；
Step 3: the combination ash after humidification carries out desulphurization reaction with the flue gas in boiler (6) in reactor (3)；
Step 4: the flue gas after mixer (2) interior desulphurization reaction returns to circulation cleaning in bag filter (5), second step is repeated
And third step；
Step 5: transport to grey library (4) store after the flue gas in mixer (2) completes desulphurization reaction；
It is characterized in that: preheating step is added before the smoke inlet (52) that the 4th step flue gas enters bag filter (5)
Suddenly.
2. a kind of NID sulfur removal technology according to claim 1, it is characterized in that: the preheating step is in bag-type dust
It is carried out at the smoke inlet (52) of device (5).
3. a kind of NID sulfur removal technology according to claim 1, it is characterized in that: the preheating step is added by electricity
The mode of heat carries out.
4. a kind of NID sulfur removal technology according to claim 1, it is characterized in that: preheating temperature control is at 80 °C
More than.
5. a kind of bag filter is used in Claims 1-4 in any one NID sulfur removal technology, it is characterized in that: the cloth
The smoke inlet (52) of bag dust collector (5) lower end is circumscribed with the pre-add passage of heat (53) made of heat-transfer matcrial.
6. a kind of bag filter according to claim 5, it is characterized in that: the inner wall of the pre-add passage of heat (53) is equipped with
Interlayer (531), interlayer (531) inside spin are fixed with electric heating wire (532).
7. a kind of bag filter according to claim 6, it is characterized in that: the inner wall posts heat-transfer film (533).
8. a kind of bag filter according to claim 5, it is characterized in that: the pre-add passage of heat (53) and the flue gas
Guide pipe (54) are equipped between entrance (52), the direction of caliber towards the smoke inlet (52) of the guide pipe (54) is gradually contracted
It is small.
9. a kind of bag filter according to claim 8, it is characterized in that: the guide pipe (54) inner wall is equipped with several prolong
It gets a breathing space the unhurried current piece (55) of stream, the unhurried current piece (55) one end and the guide pipe (54) inner wall are hinged, and the other end is free end.
10. a kind of bag filter according to claim 8, it is characterized in that: the guide pipe (54) is by sound-absorbing material system
At.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710929710.6A CN109621571A (en) | 2017-10-09 | 2017-10-09 | A kind of NID sulfur removal technology and the bag filter for the sulfur removal technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710929710.6A CN109621571A (en) | 2017-10-09 | 2017-10-09 | A kind of NID sulfur removal technology and the bag filter for the sulfur removal technology |
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| Publication Number | Publication Date |
|---|---|
| CN109621571A true CN109621571A (en) | 2019-04-16 |
Family
ID=66051206
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710929710.6A Pending CN109621571A (en) | 2017-10-09 | 2017-10-09 | A kind of NID sulfur removal technology and the bag filter for the sulfur removal technology |
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| CN (1) | CN109621571A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112090182A (en) * | 2020-09-17 | 2020-12-18 | 曹真武 | Dry dedusting system for proportioning roller of sintering machine |
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2017
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| JP2014013102A (en) * | 2012-07-04 | 2014-01-23 | Takuma Co Ltd | Device and method for treating combustion exhaust gas in refuse incineration treatment facility |
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| CN112090182A (en) * | 2020-09-17 | 2020-12-18 | 曹真武 | Dry dedusting system for proportioning roller of sintering machine |
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