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Airflow crushing tail gas afterheat utilization method for titanium white powder processing

A technology of airflow crushing and titanium dioxide, which is applied in the field of titanium dioxide processing, can solve the problems of low recycling rate and achieve the effects of sufficient absorption and purification, pollution reduction, and sufficient heat exchange

Active Publication Date: 2017-09-05
ANHUI JXTB GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiency of the low heat recovery utilization rate of the titanium dioxide pulverization air flow in the prior art, and provides a method for utilizing the waste heat of the air flow pulverization tail gas for titanium dioxide processing. The harmful gas is removed, the energy utilization rate is greatly improved, the pollution to the environment is reduced, and the production cost is saved

Method used

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  • Airflow crushing tail gas afterheat utilization method for titanium white powder processing
  • Airflow crushing tail gas afterheat utilization method for titanium white powder processing
  • Airflow crushing tail gas afterheat utilization method for titanium white powder processing

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Embodiment 1

[0039] combine figure 1 , a secondary waste heat recovery and utilization system of titanium dioxide post-processing airflow crushing tail gas in this embodiment is mainly composed of a heat exchanger 2, a liquid seal tank 4 and a hydraulic injector 1, and its air inlet is connected to the heat exchanger 2, Its water inlet end is connected with the circulating water pump 6, and its drain end is located in the liquid seal tank 4, and is connected with the turbulence heat exchange mechanism 8 at the drain end; the solution after heat exchange in the liquid seal tank 4 is used to supply water for the crude product.

[0040] The heat exchanger 2 is a commonly used heat exchange element at present. This device is mainly used for heat exchange for the first time. Since the heat carried by the original crushing air flow is relatively large, the heat exchange can be performed directly through the heat exchanger. When the heat exchange temperature reaches about 100°C, it is difficult t...

Embodiment 2

[0050] The secondary waste heat recovery and utilization system of titanium dioxide post-processing jet crushing exhaust gas in this embodiment has the same basic structure as that of embodiment 1, the difference is that in this embodiment, a water replenishment port is provided above the liquid seal tank 4, and The water flow is controlled by the replenishment control valve 7.

[0051] Preferably, a liquid level gauge can be set in the liquid seal tank 4. When the liquid level is lower than the set value, the water replenishment control valve 7 is automatically controlled to open to replenish water in the liquid seal tank; when the water level reaches a specified value, the water replenishment control valve is controlled. 7 Close, circulate the water in the liquid seal tank to absorb the heat in the exhaust gas.

[0052] The top of the liquid seal tank 4 is closed and is provided with an exhaust pipe 9. The exhaust gas after the energy is absorbed is concentrated and discharg...

Embodiment 3

[0054] A secondary waste heat recovery and utilization system for titanium dioxide post-treatment airflow crushing tail gas in this embodiment has the same basic structure as that of Embodiment 2, the difference is that the turbulence heat exchange mechanism 8 in this embodiment is mainly composed of external turbulence The chamber 82 and the inner turbulence chamber 83 are composed, and the outer turbulence chamber 82 communicates with the water outlet pipe 3 on the water jet 1 , so that the mixed medium flowing out of the water jet 1 enters the outer turbulence chamber 82 . The set inner turbulence chamber 83 communicates with the outer turbulence chamber 82, the top of the inner turbulence chamber 83 is open, and the bottom end of the inner turbulence chamber 83 is connected to the liquid seal tank 4 through a water pipe, then the water liquid in the outer turbulence chamber 82 can be It enters into the liquid seal tank 4 through the inner turbulence chamber 83, so as to rea...

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Abstract

The invention discloses an airflow crushing tail gas afterheat utilization method for titanium white powder processing, and belongs to the field of titanium white powder processing. An adopted system comprises a heat exchanger, a liquid sealing groove and a hydraulic ejector; a drainage end of the hydraulic ejector is connected with a turbulent flow heat exchange mechanism; solution in the liquid sealing groove after heat exchange is used for supplying water to crude products; the water feeding is controlled through liquid level detection in use; after the stated liquid level is reached, the circular heat exchange is started; and the drainage is controlled according to the temperature change. Crushing airflow heat is secondarily recycled, and meanwhile, harmful gas therein is removed, so that the energy utilization rate is greatly increased, the environmental pollution is reduced, and the production cost is saved.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide processing, and more specifically relates to a method for utilizing waste heat of jet milling tail gas for titanium dioxide processing. Background technique [0002] Titanium dioxide is an important white pigment. In industrial manufacturing, the crude product of titanium dioxide (mainly composed of titanium dioxide) is mainly produced by the sulfuric acid method. During the preparation process, processes such as heating and washing are required, and after post-treatment, different coatings, coatings, etc. are used. Jet milling and other processes process the crude titanium dioxide to make it suitable for different application fields. The jet pulverization process is to use high-temperature medium-pressure steam to pulverize the inorganic-coated titanium dioxide in the steam powder machine to make the titanium dioxide reach the required fineness; and the high-temperature medium-pressure s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D7/00F28F13/12
CPCF28D7/0008F28F13/12
Inventor 张修臻张本发
Owner ANHUI JXTB GRP
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