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Tail gas pressurizing system for lime kiln

A technology of pressurization system and lime kiln, which is applied in the field of exhaust gas pressurization system, can solve the problem of yellow phosphorus exhaust gas being unable to supply energy, and achieve the effects of optimizing work efficiency and stability, preventing reverse flow, and ensuring flow and pressure.

Inactive Publication Date: 2020-04-10
四川蓝海化工(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a tail gas pressurization system for lime kiln, in order to solve the problem that yellow phosphorus tail gas cannot be used as a stable combustible source to supply energy to lime kiln

Method used

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  • Tail gas pressurizing system for lime kiln
  • Tail gas pressurizing system for lime kiln
  • Tail gas pressurizing system for lime kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] refer to figure 1 As shown, one embodiment of the present invention is a tail gas pressurization system for a lime kiln, including a tail gas input system, which is used to transport the yellow phosphorus tail gas to the lime kiln by the tail gas input system, compared to the traditional coal Lime-burning kiln, using gas-fired lime kiln, has uniform temperature in the kiln, and the calcined lime product has high activity.

[0028] The gas fuel used in the gas-fired lime kiln is under the same conditions. The calorific value of fuel combustion determines the flame temperature it can achieve. The flame temperature should be higher than the temperature required for lime calcination; the combustion temperature of its yellow phosphorus tail gas can reach 900 degrees Celsius , and the heat radiation area is wide, and the yellow phosphorus tail gas is used as fuel, which can realize the resource recycling of waste gas.

[0029] When the yellow phosphorus tail gas is used as a...

Embodiment 2

[0036] Based on the above examples, refer to figure 2 As shown, another embodiment of the present invention is, in order to improve the quality of tail gas calcined lime, because there are many kinds of harmful impurities in the yellow phosphorus tail gas, hinder the effective utilization of yellow phosphorus tail gas; As we all know, as the content increases, the activity of lime decreases. The reason is that impurities react with calcium oxide in active lime, such as calcium sulfide, calcium sulfite, calcium phosphide and other calcium compounds. If the oxygen content When the concentration of sulfur dioxide is high, sulfur dioxide is easily oxidized to sulfur trioxide, and the generated sulfur trioxide will react with calcium oxide to form calcium sulfate, which will lead to the bonding between lime particles and block the pores on the particle surface, which will not only reduce the activity of lime, but also It will block the carbon dioxide emission channel generated by ...

Embodiment 3

[0045] An embodiment of the present invention is, with reference to figure 1 , image 3 As shown, the above-mentioned first water seal unit 1 and the above-mentioned second water seal unit 4 both include a U-shaped pipe 11, and a raw water pipe 12 is installed on the side wall of the above-mentioned U-shaped pipe 11, which is used to input liquid from the raw water pipe 12 to the U-shaped pipe 11 , and form a water seal structure; inject liquid through the raw water pipe 12, and use the liquid to form a water seal in the U-shaped pipe 11, so that the tail gas of different sections can be relatively independent, and the backflow of tail gas in different sections can be avoided.

[0046] Further, a water seal groove 13 is provided below the above-mentioned U-shaped pipe, and a drain pipe 1101 is provided at the lower end of the above-mentioned U-shaped pipe 11. , use the drainpipe 1101 as an explosion-proof pipeline, and use the water seal groove 13 to prevent the outside air f...

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Abstract

The invention discloses a tail gas pressurizing system for a lime kiln. The tail gas pressurizing system comprises a tail gas input system, wherein the tail gas input system is used for receiving yellow phosphorus tail gas from the tail gas input system and conveying the yellow phosphorus tail gas to the lime kiln, the output end of the tail gas input system is provided with a first water seal unit, a head end of the first water seal unit is in communication with the tail gas input system, a tail end of the first water seal unit is connected with a pressurizing fan, a tail end of the pressurizing fan is connected with a secondary air distribution cylinder, the secondary air distribution cylinder is used for outputting tail gas from the output end of the secondary air distribution cylinderto the lime kiln, the secondary air distribution cylinder is provided with a pressure relief passage, a tail end of the pressure relief passage is provided with a second water seal unit, the second water seal unit is used for outputting the tail gas from the pressure relief passage to a safety torch passing through the second water seal unit, and the secondary air distribution cylinder is providedwith a second pressure sensor. The tail gas pressurizing system is expected to solve the problem that the yellow phosphorus tail gas cannot serve as stable combustible source to supply energy to thelime kiln.

Description

technical field [0001] The invention relates to environmental protection tail gas treatment, in particular to a tail gas pressurization system for a lime kiln. Background technique [0002] In the process of producing yellow phosphorus by electric furnace method, there will be by-product tail gas. The main component of yellow phosphorus tail gas is CO, and its yellow phosphorus tail gas can be used as fuel. The principle of electric furnace method to produce yellow phosphorus is the reduction reaction at high temperature. The impurities mainly exist in reduced state, among which phosphorus is mainly white phosphorus and phosphorus trichloride, sulfur is mainly hydrogen sulfide gas and organic sulfur, fluorine is mainly hydrofluoric acid, silicon tetrafluoride, etc., if it is directly used as fuel or Burning and venting directly with a torch is easy to cause serious pollution to the environment. [0003] In actual production, yellow phosphorus tail gas is used as combustion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F23G7/06
CPCF23G7/06F27D17/008Y02P10/25
Inventor 方涛袁章友
Owner 四川蓝海化工(集团)有限公司
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