Method for recovering and reutilizing exhaust waste heat of producing hexa poly sodium metal-phosphate

A technology of sodium hexametaphosphate and waste heat recovery, which is applied in steam generation methods using heat carriers, chemical instruments and methods, phosphorus compounds, etc., can solve problems such as regional environmental pollution, waste of heat energy, and corrosion of tail gas transportation equipment, and achieve The effects of protecting the environment, saving coal, and realizing the development of circular economy

Inactive Publication Date: 2007-06-27
HUBEI XINGFA CHEM GRP CO LTD
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Problems solved by technology

[0002] The tail gas emission of the production plant with an annual output of 40,000 tons of sodium hexametaphosphate is 100,000 Nm 3 / h, the discharge temperature of the exhaust gas is relatively high, reaching above 350°C, and the discharge of a large amount of high-temperature exhaust gas will cause great corrosion to the exhaust gas conveying equipment, and cause serious pollution to the regional environment, wasting a lot of heat energy

Method used

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  • Method for recovering and reutilizing exhaust waste heat of producing hexa poly sodium metal-phosphate

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Embodiment Construction

[0009] As shown in Figure 1, a method for recovering waste heat from tail gas produced by sodium hexametaphosphate is to install a waste heat drum on the tail gas pipeline produced by sodium hexametaphosphate, and the waste heat drum is composed of a buffer tank, a heat exchanger Composed of heat pipes, the tail gas with a temperature of 350°C generated during production is transferred to the heat exchanger through the heat pipes in the heat exchanger in the waste heat drum, and the water with a temperature of 20°C is heated to generate water vapor, which produces The steam passes through the steam flow meter and enters the steam pipe network of the factory area, where it is used as heating gas.

[0010] The high-temperature gas from the fusion furnace enters the tail gas flue under the action of the induced draft fan, and then enters the buffer tank. The flue gas from the buffer tank enters the heat exchanger and contacts the heat pipe. The heat of the high-temperature gas pas...

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Abstract

A method for reclaiming the afterheat (at 350 deg.C) of the tail gas generated by preparing sodium hexametaphosphate features that an afterheat steam drum composed of buffer tank, heat exchanger and heat conductive tube is installed onto tail gas pipeline to heat the water (at 20 deg.C) and generate steam for reusing it.

Description

technical field [0001] The invention relates to a method for recovering and utilizing waste heat of tail gas, in particular to a method for recovering and utilizing waste heat of tail gas produced in the production of sodium hexametaphosphate. Background technique [0002] The tail gas emission of the production plant with an annual output of 40,000 tons of sodium hexametaphosphate is 100,000 Nm 3 / h, the exhaust gas discharge temperature is relatively high, reaching above 350°C, and a large amount of high-temperature exhaust gas is discharged, causing great corrosion to the exhaust gas conveying equipment, and causing serious pollution to the regional environment, wasting a lot of heat energy. Contents of the invention [0003] The purpose of the present invention is to provide a method for recovering and reusing the waste heat of the tail gas produced by the production of sodium hexametaphosphate, which absorbs and converts the waste heat of the tail gas into water vapor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B1/18C01B25/445
CPCY02P20/10Y02P20/129
Inventor 明兵屈云李少平王杰张保义
Owner HUBEI XINGFA CHEM GRP CO LTD
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