CN206911114U - A kind of lime stone lime joint flue gas desulfurization device - Google Patents
A kind of lime stone lime joint flue gas desulfurization device Download PDFInfo
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- CN206911114U CN206911114U CN201621186855.9U CN201621186855U CN206911114U CN 206911114 U CN206911114 U CN 206911114U CN 201621186855 U CN201621186855 U CN 201621186855U CN 206911114 U CN206911114 U CN 206911114U
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- lime
- slurry
- flue gas
- lime stone
- gas desulfurization
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Abstract
It the utility model is related to a kind of lime stone lime joint flue gas desulfurization device, two kinds of desulfurizing agents of lime stone and lime can be used simultaneously, lime slurry is disposed with corresponding to the spraying layer of bottom on bottom pump entry pipeline and mends slurry mouth, it is connected with lime slaking slurries pulping device, the arranged beneath of bottom spraying layer holds liquid device, the lime white liquid measure of pump entry is filled into operation by regulation, realize and hold the pH that liquid device sizing liquor remains slightly higher, bottom stock tank maintains slightly lower pH, be advantageous to improve desulfuration efficiency, and system is succinct, adaptability is stronger.
Description
Technical field
It the utility model is related to Thermal Power Generation Industry flue gases purification field, and in particular to a kind of lime stone-lime joint is real
The desulfurizer of the ultra-clean discharge of existing flue gas.
Background technology
Year September of the continuous improvement of the environmental emission standard in China in recent years, particularly 2014, national three ministries and commissions joint are formulated
Put into effect《The energy-saving and emission-reduction of coal electricity upgrade and transformation action plan (2014-the year two thousand twenty)》, subsequent governments at all levels actively push forward, fire
The electric ultra-clean discharge of enterprise implement flue gas is trend of the times.In this context, conventional limestone-gypsum desulfurization technology achieve compared with
Big development, double-column in series technology, single column Two-way Cycle technology, single (double) pallet tower technology etc. realizes engineering.But this
A little technologies make desulfurizing agent using single lime stone, and lime stone wide material sources are cheap, but its dissolubility is poor, take off
Mass-transfer efficiency is relatively low during sulphur, and in order to ensure that desulfurized effect usually requires higher liquid-gas ratio, that is, larger slurries follow
Circular rector, cause system operation power consumption higher.Compared with lime stone, lime is also a kind of common desulfurizing agent, and its dissolubility is good,
Alkalescence is stronger, has good desulphurizing ability, but individually makees desulfurizing agent using lime, and slurry pH value is difficult to control, and lime
Powder cost is higher.
Utility model content
In the higher thermal power plant of coal-fired sulphur content, in order to ensure higher desulfuration efficiency, ultra-clean discharge is realized, it is existing
Technology path is usually to use higher serum recycle amount, and engineering construction or improvement cost are higher, and improved system operation
It is costly.In order to reduce desulphurization cost, the utility model proposes use lime stone and lime two simultaneously in a spray column
Kind desulfurizing agent carries out combined desulfurization, it is possible to achieve higher desulfuration efficiency, reaches SO2Ultra-clean emission request, and system suitability
It is stronger.
To achieve these goals, the utility model uses following technical scheme：
Lime stone of the present utility model-lime joint flue gas desulfurization device, including absorption tower, it is structurally characterized in that：Also set
Be equipped with limestone pulping device, lime slaking pulping device, gypsum dehydration machine and technique water tank, smoke inlet between exporting according to
Secondary be disposed with holds liquid device, bottom spraying layer, top spray layer, multi-stage demister, and multi-stage demister passes through mist eliminator flushing water
Pump is connected with technique water tank, and bottom spraying layer is arranged as two to five layers, corresponds to two to five bottom circulating pumps outside tower, top spray
Drenching layer corresponds to the top circulating pump outside tower, and lime slurry is arranged with the pump entry pipeline of Duo Tai bottoms and mends slurry mouth, same to stone
Ash curing slurries pulping device is connected, and absorbs and lime stone slurry benefit slurry mouth is provided with tower wall, be connected with limestone pulping device,
Oxidation fan and slurry pump are provided with outside tower, slurry pool is connected by slurry pump with gypsum cyclone, the top of gypsum cyclone
Connected with slurry pool, the bottom of gypsum cyclone is communicated to gypsum dehydration machine.
Slurry pool is connected by slurry pump with gypsum cyclone, and gypsum cyclone overflowing liquid returns to slurry pool, and underflow liquid is extremely
Gypsum dehydration machine is dehydrated.
Absorption tower described in the utility model uses reverse-flow spray absorber, and bottom is slurry pool, and middle part is provided with flue gas
Entrance, top are provided with exhanst gas outlet.
Agitator is provided with slurry pool described in the utility model.
It is described in the utility model hold liquid device while have concurrently hold liquid and flue gas and uniformly act on again, can use pallet, spiral board,
The diversified forms such as Venturi tube, flase floor.
In the process of running, the slurries of spraying layer spray form liquid film on liquid device is held, and flue gas leads to after entering absorption tower
Cross and fully contact carry out desulphurization reaction when holding liquid device with slurries, then remove the major part of its carrying by multi-stage demister again
Drop, finally discharged at the top of absorption tower.Hold liquid device while have concurrently and hold liquid and flue gas and uniformly act on again, pallet, rotation can be used
The forms such as flowing plate, Venturi tube, flase floor.By filling into fresh lime slurry at the pump entry of bottom, under can be achieved
Slurries of portion spraying layer spray and holding hold slurry pH value as 5.8~7.0 on liquid device, be so as to fully contact guarantee with flue gas
The higher desulfuration efficiency of system, and bottom slurry pond can keep slurry pH value as 4.5~5.8 oxidizing and crystallizings for being beneficial to calcium sulfite.
Top pump entry is not supplemented lime slurry, can reduce and be carried with flue gas to the Ca on demister surface (OH)2And CaCO3's
Amount, avoid demister that quick fouling occurs.
Desulfurizer described in the utility model has advantages below relative to prior art：
1st, lime slurry alkalescence is stronger, and by filling into lime slurry, liquid device is held with reference in tower, realizes an absorption tower
Different zones maintain different pH value, so as to ensure that system has higher desulfuration efficiency.
2nd, top pump entry is not supplemented lime slurry, i.e. top spray layer does not supplement lime slurry, can reduce cigarette
Gas is carried to the Ca on demister surface (OH)2And CaCO3Amount, avoid the quick fouling and blocking of demister.
3 at the same use two kinds of desulfurizing agents of lime stone and lime, desulfurization reaction product is CaSO4·2H2O, without again
Separation, flow are simple.
By adjusting the dosage of lime stone and lime desulfurization agent when the 4, running, the economical operation of system is realized, avoids list
The higher situation of liquid-gas ratio height is brought during carbonate-free lime stone desulfurization station service power consumption rate, when can avoid simple lime desulfurization again desulfurizing agent into
The shortcomings that this is higher, system suitability is strong.
Brief description of the drawings
In order to illustrate more clearly of the utility model, the required accompanying drawing used is made simple in being described below to embodiment
Ground introduction.It should be evident that drawings in the following description are only the description to embodiment of the present utility model, for this area
For those of ordinary skill, without having to pay creative labor, simple deformation can also be carried out according to technical scheme
Or title change, or customary means is taken, purpose of utility model can also be realized.
Accompanying drawing 1 is the utility model schematic flow sheet.
Label declaration：1-absorption tower；2-slurry pool；3-hold liquid device；4-bottom spraying layer；5-top spray layer；
6-multi-stage demister；7-bottom circulating pump；8-top circulating pump；9-slurry pump；10-oxidation fan；11-agitator；
12-cyclone；13-gypsum dehydration machine；14-limestone pulping device；15-lime slaking pulping device；16-process water
Case.
Embodiment
Embodiment of the present utility model is elaborated below, the present embodiment is carried out lower premised on the technical program
Implement, give detailed embodiment and specific operating process, but the scope of protection of the utility model be not limited to it is following
Embodiment.
Referring to Fig. 1, a kind of lime stone-lime joint flue gas desulfurization device and technique, absorption tower 1 are inhaled using reverse-flow spray
Receive tower, bottom be slurry pool 2, and middle part is provided with smoke inlet, and top is provided with exhanst gas outlet, smoke inlet between outlet according to
Secondary be disposed with holds liquid device 3, bottom spraying layer 4, top spray layer 5, multi-stage demister 6, and multi-stage demister 6 is rushed by demister
Wash water pump is connected with technique water tank 16, and the bottom spraying layer 4 of the present embodiment is arranged as three layers, corresponds to three bottoms circulation outside tower
Pump 7, top spray layer 5 correspond to the top circulating pump 8 outside tower, lime white are arranged with three inlet ducts of bottom circulating pump 7
Liquid mends slurry mouth, is connected with lime slaking slurries pulping device 15, absorbs and lime stone slurry benefit slurry mouth, same lime are provided with tower wall
Sizing device made of stones connected 14, slurry pool 2 are provided with agitator 11, oxidation fan 10 and slurry pump 9, slurry pool 2 are provided with outside tower
It is connected by slurry pump 9 with gypsum cyclone 12, the overflowing liquid of gypsum cyclone 12 returns to slurry pool 2, underflow liquid to gypsum dehydration
Machine 13 is dehydrated, and liquid device 3 is held in the present embodiment and uses tray form, while is had concurrently and held liquid and flue gas and uniformly act on again, under
The slurries that portion's spraying layer 4 sprays are holding the surface of liquid device 3 formation liquid film, and fresh stone is filled into by the porch of bottom circulating pump 7
Grey slurries, the slurries and holding that bottom spraying layer 4 sprays can be achieved slurry pH value is held on liquid device 3 as 5.8~7.0, so that with
Flue gas fully contacts the higher desulfuration efficiency of guarantee system, while it is 4.5~5.8 beneficial to Asia to keep pH value in bottom slurry pond 2
The oxidizing and crystallizing of calcium sulfate.The entrance of top circulating pump 8 is not supplemented lime slurry, can reduce flue gas and carry to demister surface
Ca(OH)2And CaCO3Amount, avoid the quick fouling of demister.
Although the embodiment of the utility model and its method is disclosed as above, it is not restricted to specification and reality
Listed utilization in example is applied, it can be applied to various suitable fields of the present utility model completely, for man skilled in the art
For member, other modification is easily achieved, therefore in the universal limited without departing substantially from claim and equivalency range
Under, the utility model and its method are not limited to specific details and shown here as the legend with description.
Claims (4)
1. a kind of lime stone-lime joint flue gas desulfurization device, including absorption tower (1), it is characterised in that：It is additionally provided with lime stone
Pulping device (14), lime slaking pulping device (15), gypsum dehydration machine and technique water tank (16), smoke inlet is between exporting
It has been sequentially arranged and has held liquid device (3), bottom spraying layer (4), top spray layer (5), multi-stage demister (6), multi-stage demister (6)
It is connected by mist eliminator flushing water pump with technique water tank (16), bottom spraying layer (4) is arranged as two to five layers, corresponds to two outside tower
To five bottom circulating pumps (7), the top circulating pump (8) outside the corresponding tower of top spray layer (5), Duo Tai bottoms circulating pump (7) enters
Lime slurry is arranged with mouth pipeline and mends slurry mouth, is connected with lime slaking slurries pulping device (15), is absorbed and set in tower wall
There is lime stone slurry to mend slurry mouth, be connected with limestone pulping device (14), oxidation fan (10) and slurry pump are provided with outside tower
(9), slurry pool (2) is connected by slurry pump (9) with gypsum cyclone (12), the top of gypsum cyclone (12) and slurry pool
(2) connect, the bottom of gypsum cyclone (12) is communicated to gypsum dehydration machine (13).
2. a kind of lime stone according to claim 1-lime joint flue gas desulfurization device, is characterised by：The absorption tower
(1) reverse-flow spray absorber is used, bottom is slurry pool (2), and middle part is provided with smoke inlet, and top is provided with flue gas and gone out
Mouthful.
3. a kind of lime stone according to claim 1-lime joint flue gas desulfurization device, is characterised by：The slurry pool
(2) agitator (11) is provided with.
4. according to a kind of lime stone of claim 1 or 2 or 3-lime joint flue gas desulfurization device, it is characterised in that：It is described
Hold liquid device (3) while have concurrently and hold liquid and flue gas and uniformly act on again, pallet, spiral board, Venturi tube or flase floor can be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621186855.9U CN206911114U (en) | 2016-11-04 | 2016-11-04 | A kind of lime stone lime joint flue gas desulfurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621186855.9U CN206911114U (en) | 2016-11-04 | 2016-11-04 | A kind of lime stone lime joint flue gas desulfurization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206911114U true CN206911114U (en) | 2018-01-23 |
Family
ID=61311017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621186855.9U Active CN206911114U (en) | 2016-11-04 | 2016-11-04 | A kind of lime stone lime joint flue gas desulfurization device |
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|---|---|
| CN (1) | CN206911114U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106512697A (en) * | 2016-11-04 | 2017-03-22 | 华电电力科学研究院 | Limestone-lime combined flue gas desulfurization device |
-
2016
- 2016-11-04 CN CN201621186855.9U patent/CN206911114U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106512697A (en) * | 2016-11-04 | 2017-03-22 | 华电电力科学研究院 | Limestone-lime combined flue gas desulfurization device |
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