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A secondary waste heat recovery and utilization system for titanium dioxide post-processing jet crushing tail gas

A technology of jet crushing and waste heat recovery, which is applied in the field of titanium dioxide processing, can solve the problems of low recycling rate, achieve sufficient absorption and purification, increase heat exchange area and contact time, and fully utilize energy

Active Publication Date: 2020-02-07
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 titanium dioxide pulverization airflow in the prior art, and provide a secondary waste heat recovery and utilization system of titanium dioxide post-processing airflow pulverization exhaust gas. The present invention performs secondary recovery of the heat of pulverization airflow At the same time, the harmful gas in it is removed, which greatly improves the energy utilization rate, reduces the pollution to the environment, and saves production costs.

Method used

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  • A secondary waste heat recovery and utilization system for titanium dioxide post-processing jet crushing tail gas
  • A secondary waste heat recovery and utilization system for titanium dioxide post-processing jet crushing tail gas
  • A secondary waste heat recovery and utilization system for titanium dioxide post-processing jet crushing tail gas

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Embodiment 1

[0032] to 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.

[0033] 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 difficul...

Embodiment 2

[0043] 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.

[0044] 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.

[0045] 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

[0047] 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 a secondary wastewater recycling system for titanium dioxide post-treatment airflow crushing tail gas, and belongs to the field of titanium dioxide processing. The secondary wastewater recycling system for titanium dioxide post-treatment airflow crushing tail gas comprises a heat exchanger and a liquid seal slot, and further comprises a hydraulic ejector, wherein a gas inlet end of the hydraulic ejector communicates with the heat exchanger; a water inlet end of the hydraulic ejector is connected with a circulating water pump, a water outlet end of the hydraulic ejector is positioned in the liquid seal slot, and the water outlet end is connected with a turbulent-flow heat exchange mechanism; and a heat-exchanged solution in the liquid seal slot supplies water to a crude product. Crushing airflow heat is recycled for a second time, and harmful gas in the crushing airflow heat is removed, so that an energy utilization rate is greatly increased, pollution on environment is reduced, and production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide processing, and more specifically, relates to a system for recovering and utilizing secondary waste heat of exhaust gas from airflow pulverization after titanium dioxide post-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 f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28C3/06F28F13/12B01D53/18B01D47/00
CPCB01D47/00B01D53/18F28C3/06F28F13/125
Inventor 张修臻张本发
Owner ANHUI JXTB GRP
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