Spiral three-stage quicklime slaking device and method

A quicklime and spiral technology, applied in the field of spiral three-stage quicklime digestion device, can solve the problems of uneven water spraying, poor adjustability, high viscosity, etc. Effect

Pending Publication Date: 2021-01-29
TIANJIN IRON WORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the sintering process, desulfurization and denitration has become a necessary environmental protection project after 2019. Slaked lime is used as a desulfurizer. If hydrated lime is purchased directly, the price is relatively high (the price difference is 200 yuan / ton). At the same time, other types of desulfurizers can be selected, such as KR desulfurizer, high-phosphorus desulfurizer, etc., or the generally used digestion devices are blade rotating stirring digestion device and rotating water spray digestion device. The blade rotating stirring digestion device has the following disadvantages, the digestion control time is relatively fixed, and the adjustability is relatively low. Poor, the digestion reaction requires that the lime quality must ensure sufficient activity, otherwise it cannot meet the complete digestion reaction, resulting in poor quality, and the rotating water spray digestion device, the position of the water spray head is low, the lime is viscous after digestion, and it is easy to block. The maintenance cycle is short and the maintenance rate is high; at the same time, the water spray is uneven and the mixing effect is poor

Method used

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  • Spiral three-stage quicklime slaking device and method

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Effect test

Embodiment 1

[0039] A spiral type three-stage quicklime digestion device, the spiral three-stage quicklime digestion device includes lime lime pipes, quicklime bins, ash discharge valves, feeders, screw digesters, pressure fans and lime bins connected in sequence, the An atomizing nozzle is installed on the top of the spiral digester, and the atomizing nozzle is supplied with air by a pressure air pipe, and water is supplied by a pressure water pipe, and a spiral stirring rod is arranged inside the spiral digester, and the spiral stirring rod is driven by a motor;

[0040] The feed inlet of the quicklime bin is connected to the lime pipe, the outlet of the quicklime bin is connected to the feeder inlet, the outlet of the quicklime bin is provided with a discharge valve, and the feeder Conveyor belt is provided inside, the discharge port of the feeder is connected with the feed port of the spiral digester, the discharge port of the spiral digester is provided with a pressing fan, and the dis...

Embodiment 2

[0060] A three-stage quicklime digestion method, the three-stage quicklime digestion method adopts the spiral three-stage quicklime digestion device described in any one of the above.

[0061] Further speaking, it can also be considered in the present invention that the three-stage quicklime digestion method includes the following steps:

[0062] The temperature range in the first-stage spiral digester is 140-160°C. If the temperature does not meet the range requirements, it means that the digestion is not complete. It is necessary to increase the amount of water and reduce the speed according to the feeding amount; if the temperature exceeds the range, then Increase the rotation speed to ensure that the temperature range in the second-stage spiral digester reaches 150-180°C. If the digestion effect still cannot be achieved, control the third-stage spiral digester to reduce or increase the speed to ensure that the temperature range is 70-90°C. This proves that the digestion re...

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Abstract

The invention belongs to the technical field of iron and steel metallurgy desulfurization and denitrification, and relates to a spiral three-stage quicklime slaking device and method. The spiral three-stage quicklime slaking device comprises a lime beating pipeline, a quicklime bin, a lime discharging valve, a feeding machine, a spiral slaker, a pressing fan and a slaked lime bin which are connected in sequence; an atomizing nozzle is installed at the top of the spiral slaker; a pressure air pipe is used for supplying air to the atomizing nozzle; a pressure water pipe is used for supplying water to the atomizing nozzle; a spiral stirring rod is arranged in the spiral slaker; and the spiral stirring rod is driven by a motor. With the spiral three-stage quicklime slaking device and method provided by the invention adopted, the reduction of desulfurization cost can be benefited, sufficient and complete reaction of slaking can be ensured, slaked lime can keep a high temperature; and the slaked lime can be obtained as required. The spiral three-stage quicklime slaking device and method are stable, reliable, safe, convenient and rapid to maintain.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy desulfurization and denitrification, and in particular relates to a spiral three-stage quicklime digestion device and method. Background technique [0002] Existing techniques and drawbacks: [0003] In the sintering process, desulfurization and denitration has become a necessary environmental protection project after 2019. Slaked lime is used as a desulfurizer. If hydrated lime is purchased directly, the price is relatively high (the price difference is 200 yuan / ton). At the same time, other types of desulfurizers can be selected, such as KR desulfurizer, high-phosphorus desulfurizer, etc., or the generally used digestion devices are blade rotating stirring digestion device and rotating water spray digestion device. The blade rotating stirring digestion device has the following disadvantages, the digestion control time is relatively fixed, and the adjustability is relatively low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/08
CPCC04B2/08
Inventor 马建军张树刚朱顺华师平
Owner TIANJIN IRON WORKS CO LTD
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