CN216778198U - System for refine lime breast - Google Patents
System for refine lime breast Download PDFInfo
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- CN216778198U CN216778198U CN202122871569.3U CN202122871569U CN216778198U CN 216778198 U CN216778198 U CN 216778198U CN 202122871569 U CN202122871569 U CN 202122871569U CN 216778198 U CN216778198 U CN 216778198U
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- lime milk
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- lime
- milk tank
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Abstract
A system for refining lime milk comprises a sedimentation deslagging pool, a primary lime milk tank, a hydrocyclone, a secondary lime milk tank, a feed pump, an inclined separation sieve and a refined lime milk tank; the sedimentation deslagging pool, the primary lime milk tank, the feed pump, the hydrocyclone, the secondary lime milk tank, the feed pump and the inclined separation sieve are matched in series; a feed port above the sedimentation slag removal tank is matched with a discharge port of the lime slaker, a discharge port on the side part of the sedimentation slag removal tank is communicated with an inlet of a primary lime milk tank through a pipeline or a chute, an outlet of the primary lime milk tank is communicated with a feed port of a hydrocyclone through a feed pump, and a discharge port of the hydrocyclone is communicated with an inlet of a secondary lime milk tank through a pipeline; the outlet of the secondary lime milk groove is matched with the inclined separating screen through a feeding pump. The lime milk refined and purified by the method can meet the use requirement of desulfurization of a thermoelectric boiler, can replace the lime milk prepared from high-price lime powder, and saves the desulfurization operation cost.
Description
Technical Field
The utility model belongs to the technical field of production of alumina and fine alumina, and particularly relates to a system for refining lime milk.
Background
Lime milk prepared by lime powder is usually used for desulfurization of auxiliary boilers in alumina production, and the running cost is high due to the high price of the lime powder. The alumina is built with a lime milk preparation process by using common high-calcium lime, and how to remove slag, refine and purify the common lime milk to meet the use requirement of desulfurization of a thermoelectric boiler has important significance for saving the desulfurization operation cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a system for refining lime milk, which is used for replacing lime milk prepared from high-price lime powder for boiler desulfurization through three-time deslagging, refining and purification of the lime milk by gravity settling, a hydrocyclone and an inclined sieve, and can also be used for preparing the lime milk for producing fine alumina.
The system for refining lime milk comprises a sedimentation deslagging pool 2, a primary lime milk tank 3, a hydrocyclone 5, a secondary lime milk tank 6, a feed pump 7, an inclined separation sieve 8 and a finished lime milk tank 9; a feed port above the sedimentation deslagging tank 2 is matched with a discharge port of the lime slaker 1, a discharge port at the side part of the sedimentation deslagging tank 2 is communicated with an inlet of a primary lime milk tank 3 through a pipeline or a chute, an outlet of the primary lime milk tank 3 is communicated with a feed port of a hydrocyclone 5 through a feed pump 4, and a discharge port of the hydrocyclone 5 is communicated with an inlet of a secondary lime milk tank 6 through a pipeline; the outlet of the secondary lime milk tank 6 is matched with an inclined separating screen 8 through a pipeline with a feed pump 7; the bottom outlet of the inclined separating screen 8 is communicated with a finished product lime milk tank 9.
In the system, a discharge hole at the bottom of the hydrocyclone 5 is matched with a feed inlet above the sedimentation deslagging pool 2.
In the above system, the side discharge opening of the inclined separating screen 8 is fitted with the conveying trough 10.
The method for refining lime milk adopts the system and comprises the following steps:
(1) putting the raw material lime milk prepared by the lime slaking machine 1 into a sedimentation deslagging pool 2, separating to remove coarse slag after gravity sedimentation deslagging, and separating out second lime milk to enter a primary lime milk tank 3;
(2) conveying the second lime milk in the primary lime milk tank 3 to a hydrocyclone 5 through a feed pump 4, deslagging by cyclone, and taking the separated overflow as third lime milk to enter a secondary lime milk tank 6;
(3) and (3) conveying the third lime milk in the secondary lime milk tank 6 to an inclined separation sieve 8 through a feed pump 7, and sieving finished lime milk to enter a finished lime milk tank 9.
In the method, the particle size of the particle part in the second lime milk is less than 1mm, and the content of the particle part is 170-210 g/L.
In the method, the particle size of the particle part in the third lime milk is less than 0.5mm, and the content of the particle part is 160-205 g/L.
In the method, the particle size of the particle part in the finished product of the lime milk is less than 0.3mm, and the content of the particle part is 150-200 g/L.
In the method, the raw material lime milk prepared by the lime slaking machine 1 is formed by digesting high-calcium lime with water.
The system of the utility model uses the lime milk which is refined and purified by the common high-calcium lime milk through three deslagging and refining of 'gravity settling + hydrocyclone + inclined screen', can meet the use requirement of the desulfurization of the thermoelectric boiler, can completely replace the lime milk prepared by high-price lime powder, and saves the operation cost of the desulfurization.
Drawings
FIG. 1 is a schematic diagram of the system structure of refined lime milk of the present invention; in the figure, 1, an ash melting machine, 2, a sedimentation deslagging pool, 3, a primary lime milk tank, 4, a feeding pump, 5, a hydrocyclone, 6, a secondary lime milk tank, 7, a feeding pump, 8, an inclined separating screen, 9, a finished lime milk tank, 10 and a conveying tank.
Detailed Description
The aperture of the inclined separation screen in the embodiment of the utility model is 0.3 mm.
Example 1
The system structure of the refined lime milk is shown in figure 1, and comprises a sedimentation deslagging pool 2, a primary lime milk tank 3, a hydrocyclone 5, a secondary lime milk tank 6, a feed pump 7, an inclined separating screen 8 and a finished lime milk tank 9; a feed port above the sedimentation deslagging tank 2 is matched with a discharge port of the lime slaker 1, a discharge port at the side part of the sedimentation deslagging tank 2 is communicated with an inlet of a primary lime milk tank 3 through a pipeline, an outlet of the primary lime milk tank 3 is communicated with a feed port of a hydrocyclone 5 through a feed pump 4, and a discharge port of the hydrocyclone 5 is communicated with an inlet of a secondary lime milk tank 6 through a pipeline; the outlet of the secondary lime milk tank 6 is matched with an inclined separating screen 8 through a pipeline with a feed pump 7; the bottom outlet of the inclined separating screen 8 is communicated with a finished product lime milk tank 9;
a discharge hole at the bottom of the hydrocyclone 5 is matched with a feed hole above the sedimentation deslagging pool 2;
a discharge hole at the side part of the inclined separating screen 8 is matched with the conveying groove 10;
the method comprises the following steps:
putting the raw material lime milk prepared by the lime slaking machine 1 into a sedimentation deslagging pool 2, separating to remove coarse slag after gravity sedimentation deslagging, and separating out second lime milk to enter a primary lime milk tank 3;
conveying the second lime milk in the primary lime milk tank 3 to a hydrocyclone 5 through a feed pump 4, and separating overflow to serve as third lime milk to enter a secondary lime milk tank 6 after deslagging through cyclone;
conveying the third lime milk in the secondary lime milk tank 6 to an inclined separating screen 8 through a feed pump 7, and screening out finished lime milk to enter a finished lime milk tank 9;
the particle size of the particle part in the second lime milk is less than 1mm, and the content of the particle part is 170-210 g/L;
the particle size of the particle part in the third lime milk is less than 0.5mm, and the content of the particle part is 160-205 g/L;
the particle size of the particle part in the finished product of the lime milk is less than 0.3mm, and the content of the particle part is 150-200 g/L;
the raw material lime milk prepared by the lime slaking machine 1 is the raw material lime milk formed by adopting water to digest high-calcium lime, mixing each ton of high-calcium lime with 5 cubic meters of water with the temperature of 60 ℃, and digesting; the effective calcium content of the high-calcium lime is 85-90%;
the particle part (solid content) of the finished product of the lime milk is 190g/L, and the density is 1.11t/m3The pH value is 13, and the requirement of the desulfurized lime milk is met.
Example 2
The system structure of the refined lime milk is the same as that of the embodiment 1;
the method comprises the following steps:
putting the raw material lime milk prepared by the lime slaking machine 1 into a sedimentation deslagging pool 2, separating to remove coarse slag after gravity sedimentation deslagging, and separating out second lime milk to enter a primary lime milk tank 3;
conveying the second lime milk in the primary lime milk tank 3 to a hydrocyclone 5 through a feed pump 4, and separating overflow to serve as third lime milk to enter a secondary lime milk tank 6 after deslagging through cyclone;
conveying the third lime milk in the secondary lime milk tank 6 to an inclined separating screen 8 through a feed pump 7, and screening out finished lime milk to enter a finished lime milk tank 9;
the particle size of the particle part in the second lime milk is less than 1mm, and the content of the particle part is 170-210 g/L;
the particle size of the particle part in the third lime milk is less than 0.5mm, and the content of the particle part is 160-205 g/L;
the particle size of the particle part in the finished product of the lime milk is less than 0.3mm, and the content of the particle part is 150-200 g/L;
the raw material lime cream prepared by the lime slaking machine 1 is the raw material lime cream formed by adopting water to slake high-calcium lime, and each ton of the high-calcium lime is mixed with 6 cubic meters of water with the temperature of 60 ℃ and slaked; the effective calcium content of the high-calcium lime is 75 percent;
the particle part (solid content) of the finished product of the lime milk is 155g/LDensity 1.05t/m3The pH value is 12.4, and the requirement of desulfurized lime milk is met.
Claims (3)
1. A system for refining lime milk is characterized by comprising a sedimentation deslagging pool, a primary lime milk tank, a hydrocyclone, a secondary lime milk tank, a feed pump, an inclined separation sieve and a refined lime milk tank; a feed port above the sedimentation deslagging tank is matched with a discharge port of the ash melting machine, the discharge port at the side part of the sedimentation deslagging tank is communicated with an inlet of a primary lime milk tank through a pipeline or a chute, an outlet of the primary lime milk tank is communicated with a feed port of a hydrocyclone through a feed pump, and a discharge port of the hydrocyclone is communicated with an inlet of a secondary lime milk tank through a pipeline; the outlet of the secondary lime milk tank is matched with the inclined separating screen through a feeding pump; the bottom outlet of the inclined separating screen is communicated with a finished product lime milk tank.
2. The system of claim 1, wherein a discharge opening at the bottom of the hydrocyclone is fitted with a feed opening above the sedimentation tank.
3. A system for refining milk of lime according to claim 1, wherein the side discharge opening of the inclined separating screen is fitted with a conveying trough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122871569.3U CN216778198U (en) | 2021-11-22 | 2021-11-22 | System for refine lime breast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122871569.3U CN216778198U (en) | 2021-11-22 | 2021-11-22 | System for refine lime breast |
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| Publication Number | Publication Date |
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| CN216778198U true CN216778198U (en) | 2022-06-21 |
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| CN202122871569.3U Active CN216778198U (en) | 2021-11-22 | 2021-11-22 | System for refine lime breast |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114210130A (en) * | 2021-11-22 | 2022-03-22 | 中铝集团山西交口兴华科技股份有限公司 | System and method for refining lime milk |
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2021
- 2021-11-22 CN CN202122871569.3U patent/CN216778198U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114210130A (en) * | 2021-11-22 | 2022-03-22 | 中铝集团山西交口兴华科技股份有限公司 | System and method for refining lime milk |
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