CN104119002A - Preparation method and preparation device for lime slurry - Google Patents
Preparation method and preparation device for lime slurry Download PDFInfo
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- CN104119002A CN104119002A CN201410316981.0A CN201410316981A CN104119002A CN 104119002 A CN104119002 A CN 104119002A CN 201410316981 A CN201410316981 A CN 201410316981A CN 104119002 A CN104119002 A CN 104119002A
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- lime
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- white
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Abstract
The invention discloses a preparation method and a preparation device for a lime slurry, wherein the preparation method for the lime slurry comprises the steps: according to the total slurry preparation amount and the concentration of the lime slurry, calculating the lime adding amount and the water intake amount, at the same time, considering a difference of adopting slaked lime and quick lime for preparing the slurry, and respectively calculating different lime adding amounts and different water intake amounts when lime respectively adopts the slaked lime and the quick lime. Compared with the prior art which does not consider the difference of the slaked lime and the quick lime, the preparation method for the lime slurry can effectively control the concentration of the lime slurry, so as to solve the problems of large workload and relatively large material consumption due to the uneven lime slurry concentration.
Description
Technical field
The present invention relates to flue gas processing technology field, particularly, relate to a kind of preparation method of lime white.And preparation facilities.
Background technology
In today of resource scarcity, how on the basis that ensures each side technical indicator, effectively to control supplies consumption, be the realistic problem that each enterprise development faces.China's garbage incinerating tail gas treatment technology adopts the technique of SNCR (selective non-catalytic reduction technology)-rotating spraying semidrying-dry method-gac injection-bag-type dust conventionally.Wherein rotating spraying semidrying is exactly lime slurry atomization, reacts, thereby reach the object of depickling in reaction tower with the acidic substance in flue gas.Therefore, stablizing of lime white concentration proportioning, is directly connected to the stability of production and the consumption of material.
In prior art, in the process of preparing lime white, to the control mode of lime white concentration for a kind of simple proportioning method of calculation are provided: go out the weight of lime and the weight of water according to the per-cent of lime white concentration and total, measure material by weighing system, then by weighted lime and water mix and blend, do not consider difference raw, white lime.According to situ production personnel reflection, the lime white of producing by this control mode is surveyed sample, find its actual concentrations and to set concentration error larger, high energy differs more than one times.Adopt this lime white depickling, in production, mostly rule of thumb manually control reaction tower whitewashing amount, increased on the one hand workman's workload, cause on the other hand supplies consumption larger.
Therefore, how to provide a kind of lime white preparation method, can effectively control the concentration of lime white, thereby it is large to solve the workload causing due to lime white density unevenness, the problem that supplies consumption is larger, is the technical problem that those skilled in the art need solution badly.
Summary of the invention
In summary of the invention part, introduced the concept of a series of reduced forms, this will further describe in embodiment part.Summary of the invention part of the present invention does not also mean that key feature and the essential features that will attempt to limit technical scheme required for protection, does not more mean that the protection domain of attempting to determine technical scheme required for protection.
In order to address the above problem, the invention discloses a kind of preparation method of lime white, comprising:
Step 1: according to total slurrying amount and the concentration of lime white to be prepared, calculate lime injected volume and corresponding flooding quantity;
Step 2: according to the lime injected volume and the flooding quantity that calculate in step 1, lime and water are supplied to respectively in preparation tank;
Step 3: the described lime in preparation tank and water are mixed and stirred, to be prepared into described lime white;
Wherein, in step 1,
In the time that described lime is white lime, lime injected volume
flooding quantity
In the time that described lime is unslaked lime, lime injected volume
flooding quantity W
water=W
dilution+ W
aging, wherein, W
agingthat unslaked lime reaction generates the required slaking water yield of white lime, and W
aging=W
ca (OH) 2-W
caO;
Wherein, W
totalfor total slurrying amount; LC is concentration.
Preferably, also comprise step 4: the lime white producing in described step 3 is delivered in storage tank and is stored.
Preferably, described step 3 also comprises: the water vapour of draining and producing in preparation tank described in whipping process.
Beneficial effect of the present invention is:
The preparation method of lime white provided by the invention, calculate lime injected volume and flooding quantity according to total slurrying amount of lime white and concentration, consider the difference that adopts white lime slurrying and adopt unslaked lime slurrying simultaneously, lime injected volume and flooding quantity different in the time that lime is respectively white lime with unslaked lime are wherein calculated respectively, than the difference of not considering white lime and unslaked lime in prior art, the preparation method of lime white provided by the invention, can effectively control the concentration of lime white, thereby it is large to solve the workload causing due to lime white density unevenness, the problem that supplies consumption is larger.
The present invention also provides a kind of preparation facilities of lime white, comprising:
Lime silo, described lime silo is used for depositing lime;
Preparation tank, described preparation tank has the lime dispensing port being connected with described lime silo and the water-in being connected with external water source, is provided with for stirring and enters the lime of described preparation tank and the agitator of water in described preparation tank; With
Controller, it is white lime different lime injected volume and corresponding flooding quantity during with unslaked lime that described controller can calculate respectively lime according to total slurrying amount of required lime white and concentration, and described controller is supplied with lime and water according to lime silo described in described lime injected volume and flooding quantity control and described external water source to described preparation tank.
Preferably, between described lime dispensing port and described lime silo, be provided with weight feed spiral, described in weight feed screw, in preparation tank, supply with lime described in described controller control.
Preferably, described weight feed spiral can switch by variable frequency control between high-speed cruising and low cruise.
Preferably, between described water-in and described external water source, be provided with under meter.
Preferably, also comprise the storage tank being connected with described preparation tank, described storage tank is for storing the lime white that described preparation tank prepares.
Preferably, also comprise the vacuum fan being arranged in described preparation tank, the water vapour of described vacuum fan for draining and producing in preparation tank described in lime white preparation process.
Preferably, in described preparation tank, be provided with the LOAD CELLS for showing continuously described preparation tank weight.
Beneficial effect of the present invention is:
The preparation facilities of lime white provided by the invention, can be applicable to the preparation method of above-mentioned lime white, therefore, the lime white that adopts the preparation facilities of lime white provided by the invention to prepare, concentration of slurry is stable, efficiently solve the workload causing due to lime white density unevenness in prior art large, the problem that supplies consumption is larger.
Brief description of the drawings
The following accompanying drawing of the embodiment of the present invention is used for understanding the present invention in this as a part of the present invention.Shown in the drawings of embodiments of the present invention and description thereof, be used for explaining principle of the present invention.In the accompanying drawings,
Fig. 1 is the preparation method's of lime white provided by the invention schema;
Fig. 2 is the structural representation of the preparation facilities of lime white provided by the invention.
In upper figure, the corresponding relation of Reference numeral and component names is:
1 lime silo; 2 preparation tanks; 21 lime dispensing ports; 22 water-ins; 23 agitators; 3 weight feed spirals; 4 storage tanks; 5 recycle pumps; 6 reaction towers.
Embodiment
In the following description, a large amount of concrete details have been provided to more thorough understanding of the invention is provided.But, it will be apparent to one skilled in the art that the embodiment of the present invention can be implemented without one or more these details.In other example, for fear of obscuring with the embodiment of the present invention, be not described for technical characterictics more well known in the art.
In order thoroughly to understand the embodiment of the present invention, will detailed structure be proposed in following description.Obviously, the execution of the embodiment of the present invention is not limited to the specific details that those skilled in the art has the knack of.Preferred embodiment of the present invention is described in detail as follows, but except these are described in detail, the present invention can also have other embodiments.
Please refer to Fig. 1, the preparation method's that Fig. 1 is lime white provided by the invention schema.
The preparation method of lime white provided by the invention, comprising:
Step 1: according to total slurrying amount and the concentration of lime white to be prepared, calculate lime injected volume and corresponding flooding quantity;
Step 2: according to the lime injected volume and the flooding quantity that calculate in step 1, lime and water are supplied to respectively in preparation tank;
Step 3: the described lime in preparation tank and water are mixed and stirred, to be prepared into described lime white;
Wherein, in step 1,
In the time that described lime is white lime, can directly calculate lime injected volume and flooding quantity:
Lime injected volume
Flooding quantity
In the time that described lime is unslaked lime, need to consider the slaking water yield required when unslaked lime reaction generates white lime:
Particularly, according to chemical equation: Ca (OH) 2=CaO+H2O;
Corresponding molar mass formula is: 74
g/mol=56
g/mol+ 18
g/mol;
Calculate:
Lime injected volume
flooding quantity W
water=W
dilution+ W
aging,
Wherein, W
agingthat unslaked lime reacts the slaking water yield required while generating white lime, and W
aging=W
ca (OH) 2-W
caO;
Wherein, W
totalfor total slurrying amount; LC is concentration.
Visible, the preparation method of lime white provided by the invention, calculate lime injected volume and flooding quantity according to total slurrying amount of lime white and concentration, consider the difference that adopts white lime slurrying and adopt unslaked lime slurrying simultaneously, lime injected volume and flooding quantity different in the time that lime is respectively white lime with unslaked lime are wherein calculated respectively, than the difference of not considering white lime and unslaked lime in prior art, the preparation method of lime white provided by the invention, can effectively control the concentration of lime white, thereby it is large to solve the workload causing due to lime white density unevenness, the problem that supplies consumption is larger.
In order further to optimize technique scheme, the present invention also comprises step 4: the lime white producing in step 3 is delivered to storage in storage tank 4.Further, be stored in lime white in storage tank 4 and can continue to be delivered to reaction tower by recycle pump and carry out subsequent production flow process, produce continuously thereby can realize by above-mentioned steps 1-step 3.
In a kind of preferred embodiment of the present invention, above-mentioned steps 3 also comprises the water vapour of draining and producing in preparation tank in whipping process, can avoid like this lime caking to stop up.
Please refer to Fig. 2, the structural representation of the preparation facilities that Fig. 2 is lime white provided by the invention.
As shown in Figure 2, the invention also discloses a kind of preparation facilities of lime white, comprise lime silo 1, preparation tank 2 and controller.Wherein, lime silo 1 is for depositing lime; Preparation tank 2 has lime dispensing port 21, water-in 22 and agitator 23, and lime dispensing port 21 is connected with lime silo 1; Water-in 22 is connected with external water source; Agitator 23 is arranged in preparation tank 2, for stirring the lime and the water that enter preparation tank 2; It is white lime different lime injected volume and corresponding flooding quantity during with unslaked lime that described controller can calculate respectively lime according to total slurrying amount of required lime white and concentration, and controller is supplied with lime and water according to lime injected volume and flooding quantity control lime silo 1 and external water source to preparation tank 2.
The preparation facilities of lime white provided by the invention, can be applicable to the preparation method of above-mentioned lime white, lime silo 1 is for depositing lime, total slurrying amount and the concentration of the required lime white of controller, according to the difference of depositing lime in lime silo 1, calculate respectively white lime injected volume and corresponding flooding quantity, unslaked lime injected volume and corresponding flooding quantity thereof thereof simultaneously.And then control quantitative lime and water enters preparation tank 2.Then, by being arranged in the stirring of preparation tank 2 agitators 23, lime and water are fully mixed, and the required lime white of formation that stirs.Therefore, the lime white that adopts the preparation facilities of lime white provided by the invention to prepare, concentration of slurry is stable, efficiently solves the workload causing due to lime white density unevenness in prior art large, the problem that supplies consumption is larger.
In order to realize controller to entering the control of injected volume of lime of preparation tank 2, in a kind of preferred embodiment of the present invention, between the lime dispensing port 21 of preparation tank 2 and lime silo 1, be provided with weight feed spiral 3, this weight feed spiral 3 of controller control is supplied with lime in preparation tank 2.Further, this weight feed spiral 3, by variable frequency control, can switch weight feed spiral 3 between high-speed cruising and low cruise.When weight feed spiral 3 high-speed cruising, supply with most of required amount of lime, while being switched to low cruise, accurately supply with remaining required a small amount of amount of lime, improved the accuracy of lime feed rate.Particularly, this weight feed spiral 3 is positioned at lime silo 1 ash bucket bottom, in the time that a preparation cycle starts, the segregaion valve in weight feed spiral 3 exits is opened, weight feed spiral 3 starts to supply with lime in preparation tank 2, and in the time that a preparation cycle finishes, weight feed spiral 3 is out of service, segregaion valve cuts out, thereby avoids the steam in preparation tank 2 to enter in weight feed spiral 3.
To entering the control of flooding quantity of water of preparation tank 2, in a kind of preferred embodiment of the present invention, between water-in 22 and external water source, be provided with under meter for the ease of controller, the water yield that enters preparation tank 2 detects by this under meter.
In a kind of preferred embodiment of the present invention, also comprise the storage tank 4 being connected with above-mentioned preparation tank 2, the lime white that this storage tank 4 prepares for storing above-mentioned preparation tank 2.Further, be stored in lime white in storage tank 4 and can continue to be delivered to reaction tower 6 by recycle pump 5 and carry out subsequent production flow process, thereby can realize by the continuous production of the preparation facilities of lime white provided by the invention.
In order further to optimize technique scheme, in the present invention, also comprise the vacuum fan being arranged in preparation tank 2, the water vapour of this vacuum fan for draining and producing in lime white preparation process preparation tank 2, can avoid lime caking to stop up like this.
Preferably, in the present invention, in preparation tank 2, be provided with the LOAD CELLS for showing continuously preparation tank 2 weight.Thereby the weight to preparation tank 2 is monitored in real time.Further, in the time that the weight of preparation tank 2 arrives setting high-value, give the alarm, controller control weight feed spiral 3 is out of service, and water valve cuts out simultaneously, stops lime silo 1 and external water source and input lime and water in preparation tank 2.In the time that the weight of preparation tank 2 arrives design low value, also can give the alarm, controller control agitator 23 stops stirring.
The present invention is illustrated by above-described embodiment, but should be understood that, above-described embodiment is the object for giving an example and illustrating just, but not is intended to the present invention to be limited in described scope of embodiments.In addition it will be appreciated by persons skilled in the art that the present invention is not limited to above-described embodiment, can also make more kinds of variants and modifications according to instruction of the present invention, these variants and modifications all drop in the present invention's scope required for protection.
Claims (10)
1. a preparation method for lime white, is characterized in that, comprising:
Step 1: according to total slurrying amount and the concentration of lime white to be prepared, calculate lime injected volume and corresponding flooding quantity;
Step 2: according to the lime injected volume and the flooding quantity that calculate in step 1, lime and water are supplied to respectively in preparation tank;
Step 3: the described lime in preparation tank and water are mixed and stirred, to be prepared into described lime white;
Wherein, in step 1,
In the time that described lime is white lime, lime injected volume
flooding quantity
In the time that described lime is unslaked lime, lime injected volume
flooding quantity W
water=W
dilution+ W
aging, wherein, W
agingthat unslaked lime reaction generates the required slaking water yield of white lime, and W
aging=W
ca (OH) 2-W
caO;
Wherein, W
totalfor total slurrying amount; LC is concentration.
2. preparation method according to claim 1, is characterized in that, also comprises:
Step 4: the lime white producing in described step 3 is delivered in storage tank and is stored.
3. preparation method according to claim 1, is characterized in that, described step 3 also comprises: the water vapour of draining and producing in preparation tank described in whipping process.
4. a preparation facilities for lime white, is characterized in that, comprising:
Lime silo, described lime silo is used for depositing lime;
Preparation tank, described preparation tank has the lime dispensing port being connected with described lime silo and the water-in being connected with external water source, is provided with for stirring and enters the lime of described preparation tank and the agitator of water in described preparation tank; With
Controller, it is white lime different lime injected volume and corresponding flooding quantity during with unslaked lime that described controller can calculate respectively lime according to total slurrying amount of required lime white and concentration, and described controller is supplied with lime and water according to lime silo described in described lime injected volume and flooding quantity control and described external water source to described preparation tank.
5. preparation facilities according to claim 4, is characterized in that, between described lime dispensing port and described lime silo, is provided with weight feed spiral, supplies with lime described in described controller control described in weight feed screw in preparation tank.
6. preparation facilities according to claim 5, is characterized in that, described weight feed spiral can switch by variable frequency control between high-speed cruising and low cruise.
7. preparation facilities according to claim 4, is characterized in that, between described water-in and described external water source, is provided with under meter.
8. preparation facilities according to claim 4, is characterized in that, also comprises the storage tank being connected with described preparation tank, and described storage tank is for storing the lime white that described preparation tank prepares.
9. preparation facilities according to claim 4, is characterized in that, also comprises the vacuum fan being arranged in described preparation tank, the water vapour of described vacuum fan for draining and producing in preparation tank described in lime white preparation process.
10. preparation facilities according to claim 4, is characterized in that, is provided with the LOAD CELLS for showing continuously described preparation tank weight in described preparation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316981.0A CN104119002A (en) | 2014-07-04 | 2014-07-04 | Preparation method and preparation device for lime slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316981.0A CN104119002A (en) | 2014-07-04 | 2014-07-04 | Preparation method and preparation device for lime slurry |
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| CN201410316981.0A Pending CN104119002A (en) | 2014-07-04 | 2014-07-04 | Preparation method and preparation device for lime slurry |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109621828A (en) * | 2018-12-27 | 2019-04-16 | 深圳雅居乐环保科技有限公司 | A kind of Novel cement slurry preparing system and its control method |
| CN110715463A (en) * | 2019-11-01 | 2020-01-21 | 金华平雪加热设备有限公司 | Fluid heating equipment with multipurpose product |
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| JPH08319113A (en) * | 1995-05-25 | 1996-12-03 | Yoshizawa Sekkai Kogyo Kk | Production of slaked lime and production apparatus therefor |
| CN201169014Y (en) * | 2008-02-22 | 2008-12-24 | 重庆钢铁集团设计院 | Preparing apparatus of lime slurry for processing refuse incineration smoke gas |
| CN101723604A (en) * | 2009-12-31 | 2010-06-09 | 无锡雪浪输送机械有限公司 | Continuous preparation system for lime slurry having fixed concentration |
| CN201801463U (en) * | 2010-07-20 | 2011-04-20 | 中冶赛迪工程技术股份有限公司 | Device for preparing lime slurry |
| CN103664007A (en) * | 2013-12-06 | 2014-03-26 | 无锡雪浪环境科技股份有限公司 | Preparation device of lime slurry for waste incineration flue gas purification |
| CN103664006A (en) * | 2013-12-06 | 2014-03-26 | 无锡雪浪环境科技股份有限公司 | Preparation control method of lime slurry for waste incineration flue gas purification |
-
2014
- 2014-07-04 CN CN201410316981.0A patent/CN104119002A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08319113A (en) * | 1995-05-25 | 1996-12-03 | Yoshizawa Sekkai Kogyo Kk | Production of slaked lime and production apparatus therefor |
| CN201169014Y (en) * | 2008-02-22 | 2008-12-24 | 重庆钢铁集团设计院 | Preparing apparatus of lime slurry for processing refuse incineration smoke gas |
| CN101723604A (en) * | 2009-12-31 | 2010-06-09 | 无锡雪浪输送机械有限公司 | Continuous preparation system for lime slurry having fixed concentration |
| CN201801463U (en) * | 2010-07-20 | 2011-04-20 | 中冶赛迪工程技术股份有限公司 | Device for preparing lime slurry |
| CN103664007A (en) * | 2013-12-06 | 2014-03-26 | 无锡雪浪环境科技股份有限公司 | Preparation device of lime slurry for waste incineration flue gas purification |
| CN103664006A (en) * | 2013-12-06 | 2014-03-26 | 无锡雪浪环境科技股份有限公司 | Preparation control method of lime slurry for waste incineration flue gas purification |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109621828A (en) * | 2018-12-27 | 2019-04-16 | 深圳雅居乐环保科技有限公司 | A kind of Novel cement slurry preparing system and its control method |
| CN110715463A (en) * | 2019-11-01 | 2020-01-21 | 金华平雪加热设备有限公司 | Fluid heating equipment with multipurpose product |
| CN110715463B (en) * | 2019-11-01 | 2020-09-04 | 台州柯诗达净水设备股份有限公司 | Fluid heating equipment with multipurpose product |
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Application publication date: 20141029 |
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