Application of chrome-nickel containing alloy concentrated sulfuric acid cooler in low-temperature-position waste heat recycling device and power generation system thereof

A waste heat recovery device, chromium-nickel alloy technology, applied in steam engine devices, machines/engines, sulfur compounds, etc., can solve problems such as high temperature, reduced corrosion rate of equipment, and difficult recovery of waste heat at low temperature, so as to improve utilization rate and increase Waste heat quality and the effect of expanding the use of waste heat

Pending Publication Date: 2018-08-24
TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides the use of a chromium-nickel alloy concentrated sulfuric acid cooler in a low-temperature waste heat recovery device and the power generation system composed of it. The use of chromium-nickel alloy makes the temperature of the concentrated sulfuric acid dry suction section as high as 130°C, and the corrosion rate of the equipment is lower. At the same time, it solves the problem of difficult recovery of waste heat at low temperature in the sulfuric acid dry suction section, makes the production of sulfuric acid self-sufficient in electricity, and can also output a certain amount of heat or electricity to the outside world

Method used

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  • Application of chrome-nickel containing alloy concentrated sulfuric acid cooler in low-temperature-position waste heat recycling device and power generation system thereof
  • Application of chrome-nickel containing alloy concentrated sulfuric acid cooler in low-temperature-position waste heat recycling device and power generation system thereof

Examples

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Embodiment 1

[0023] Embodiment 1, with reference to figure 1 , a low-temperature waste heat recovery device for a concentrated sulfuric acid cooler. The concentrated sulfuric acid cooler has an anode protection system. One or several cathodes 2 connected in parallel are arranged in the middle of the tube bundle 7, and the cathode is covered with an insulating sleeve; the inlet and outlet sides of the cylinder 5 are insulated and sealed with a control reference electrode 3 and a monitoring reference electrode 4 , the potentiostat 14 is electrically connected to the anode, the cathode 2, the control reference electrode 3, and the monitoring reference electrode 4 through wires and cables to form the anode protection system; tube box 15, and the working medium outlet 8 is arranged on the large volume tube box 15, and the tube box on the other side of the cylinder body 5 is provided with a working medium inlet 11, and the concentrated sulfuric acid cooler and the large volume tube box 15 form a...

Embodiment 2

[0026] Embodiment 2, with reference to figure 1, a low-temperature waste heat recovery device for a concentrated sulfuric acid cooler. The concentrated sulfuric acid cooler has an anode protection system. One or several cathodes 2 connected in parallel are arranged in the middle of the tube bundle 7, and the cathode is covered with an insulating sleeve; the inlet and outlet sides of the cylinder 5 are insulated and sealed with a control reference electrode 3 and a monitoring reference electrode 4 , the potentiostat 14 is electrically connected to the anode, the cathode 2, the control reference electrode 3, and the monitoring reference electrode 4 through wires and cables to form the anode protection system; 13 communicates with the gas storage tank 16, and the working fluid outlet 8 is arranged on the gas storage tank 16, and the working fluid inlet 11 is set on the tube box on the other side of the cylinder body 5, and the concentrated sulfuric acid cooler and the gas storage...

Embodiment 3

[0029] Embodiment 3, with reference to figure 2 , a power generation system composed of a chromium-nickel alloy concentrated sulfuric acid cooler and a low-temperature waste heat recovery device. The pumps are connected in turn through pipelines to form a closed loop to form a power generation system. The generator set can be a steam turbine, a screw expander or a turbogenerator set, wherein the gas storage tank mainly functions as a working fluid evaporation chamber. This cycle consists of 4 processes. The working medium enters the anode-protected concentrated sulfuric acid cooler, absorbs the low-temperature waste heat and turns it into high-temperature and high-pressure superheated steam, which is input into the gas storage tank. After the working medium steam is adjusted to a state suitable for the operation of the steam turbine, it enters the The generator set expands to do work, and then drives the generator to generate electricity, turning it into low-temperature and ...

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Abstract

The invention discloses application of chrome-nickel containing alloy concentrated sulfuric acid cooler in a low-temperature-position waste heat recycling device and a power generation system thereof.Chrome-nickel alloy is composed of 19-30% of Cr, 4-30% of Ni and greater than or equal to 0.5 and less than or equal to 3 of (Cr+Si)/(Ni+Mo) or 19-30% of Cr, 4-30% of Ni and greater than or equal to0.54 and less than or equal to 2.9, and the concentrated sulfuric acid cooler has an anode protection system. The cooler has the advantages that acid concentration that a shell side can use is 93-100%, usable temperature range is 40-130 DEG C, equipment corrosion rate is lower than or equal to 0.1mm per year, and service life of the concentrated sulfuric acid cooler is longer than or equal to 8 years; an organic working medium with low boiling point and high steam pressure is used on a tube side to recycle heat of concentrated sulfuric acid with a temperature range of 40-130 DEG C, and low-temperature-position waste heat in a dry suction working section is directly converted into electric energy, so that quality of energy is upgraded.

Description

technical field [0001] The invention relates to the technical field of concentrated sulfuric acid equipment, in particular to the use of a chromium-nickel alloy concentrated sulfuric acid cooler in a low-temperature waste heat recovery device and a power generation system composed of the same. Background technique [0002] The raw materials of sulfuric acid are mainly sulfur, pyrite and smelting flue gas from smelters. The production process mainly includes three main processes: combustion of sulfur-containing raw materials, oxidation of sulfur dioxide and absorption of sulfur trioxide. The theoretical heat of reaction accounts for about 56%, 19% and 25% of the total heat of reaction respectively. Most sulfuric acid plants recycle the high and medium temperature potential heat energy produced by the combustion of sulfur-containing raw materials and the oxidation of sulfur dioxide as much as possible. At present, only the low temperature potential heat energy in the process o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C30/00C23F13/00C01B17/80F01K17/02F01K21/00F01K25/08
CPCF01K17/02F01K21/00F01K25/08C22C19/055C22C30/00C23F13/005C01B17/806Y02P20/129
Inventor 郑建国田静李应祖石德龙陈曙彤莫春萍李治民王万林左瑞李文浩王振华
Owner TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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