Coke oven raw gas three-segment cooling method for supply hot water for heating and bathing

A three-stage cooling and raw gas technology, which is applied to heat exchanger types, indirect heat exchangers, lighting and heating equipment, etc., can solve the problems of insufficient heat utilization and energy waste, and achieve low investment and good economic benefits Effect

Inactive Publication Date: 2009-04-01
SHIJIAZHUANG NEW CENTURY COAL CHEM IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, when coking plants cool coke oven raw gas, most of them adopt the two-stage cooling method of horizontal tube primary cooler, that is, the first stage uses circulating water at 32°C±1°C and raw gas at 80°C±2°C for reverse indirect heat exchange Afterwards, the gas is cooled to 45°C±1°C, while the circulating water is heated to 45°C±1°C; the second stage uses low-temperature water at 18°C±1°C and raw coal gas at 45°C±1°C for reverse indirect heat exchange. The gas is cooled to 22°C, while the low-temperature water is heated to 24°C, so that a large amount of heat is not fully utilized during the cooling process of raw gas, resulting in waste of energy

Method used

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  • Coke oven raw gas three-segment cooling method for supply hot water for heating and bathing
  • Coke oven raw gas three-segment cooling method for supply hot water for heating and bathing

Examples

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Effect test

Embodiment 1

[0013] Example 1: The first stage uses 65℃ high temperature circulating water to cool the coal gas in the cooling pipe 1, the second stage uses 32℃ circulating water to cool the gas in the cooling pipe 2, and the third stage uses 18℃ low temperature water in the cooling pipe 3. Cooling gas, the second and third stages of heat exchange are the same as the existing process, so no further description. In the first stage, 65°C circulating water is used to reverse indirect heat exchange with the gas at 2.8m / s. The gas can be cooled to 68°C, while the circulating water is heated to 73°C. This will not only prevent the violent heat exchange from changing the temperature difference of the heat exchange tube Part of the circulating water that is large and deformed and heated to 73 is used for heating in the factory and the residents.

Embodiment 2

[0014] Example 2: The first stage uses 65℃ high temperature circulating water to cool the coal gas in the cooling pipe 1, the second stage uses 33℃ circulating water to cool the gas in the cooling pipe 2, and the third stage uses 19℃ low temperature water in the cooling pipe 3. Cooling gas, the second and third stages of heat exchange are the same as the existing process, so no further description. In the first stage, 65°C circulating water is used to reverse indirect heat exchange with the gas at 3.2m / s, so that the gas can be cooled to 70°C, and the circulating water can be heated to 75°C, which not only avoids the violent heat exchange causing the temperature difference of the heat exchange tube Part of the circulating water that is large and deformed and heated to 75°C is used for heating in the factory and heating of residents.

Embodiment 3

[0015] Example 3: The first stage uses 65℃ high temperature circulating water to cool the coal gas in the cooling pipe 1, the second stage uses 31℃ circulating water to cool the gas in the cooling pipe 2, and the third stage uses 17℃ low temperature water in the cooling pipe 3. Cooling gas, the second and third stages of heat exchange are the same as the existing process, so no further description. In the first stage, 65°C circulating water is used to reverse indirect heat exchange with gas at 3.0m / s, which can cool the gas to 69°C and the circulating water to 74°C, which not only avoids the violent heat exchange causing the temperature difference of the heat exchange tube Part of the circulating water, which is large and deformed and heated to 74°C, is used for heating in the factory and the residents.

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Abstract

The invention relates to a method for generating high-temperature heating water and hot bath water by utilizing a cross-tube primary cooler of a coke-oven plant, which is characterized in that three groups of cooling water pipes are arranged inside the primary cooler, in other words, the primary cooler is divided into three sections, a first section uses high-temperature circulating water at the temperature of 65 DEG C for coal gas cooling, a second section uses circulating water at the temperature of 32 plus or minus 1 DEG C for coal gas cooling, and a third section uses low-temperature water at the temperature of 18 plus or minus 1 DEG C for coal gas cooling; the first section implements indirect reverse heat exchange with coal gas by adopting the circulating water at the temperature of 65 DEG C and at the speed of 2.8 to 3.2 meter per second, thus cooling the temperature of the coal gas to a range between 68 and 70 DEG C and raising the temperature of the circulating water to a range between 73 and 75 DEG C, and the circulating water at the raised temperature of 73 to 75 DEG C can be used as heating and bath water. The method utilizes afterheat and can achieve the energy-saving effect. The method realizes the heat exchange by utilizing the heat of waste coal gas and then provides heat energy for citizen use, thus having energy-saving effect, less investment and better economic benefits.

Description

Technical field [0001] The invention relates to a method for using a horizontal tube primary cooler in a coking plant to produce hot water for high-temperature heating and bathing. Background technique [0002] At present, coking plants mostly use horizontal tube primary cooler two-stage cooling method when cooling raw coke oven gas, that is, the first stage uses 32℃±1℃ circulating water and 80℃±2℃ raw gas reverse indirect heat exchange. Then the gas is cooled to 45℃±1℃, and the circulating water is heated to 45℃±1℃; the second stage uses 18℃±1℃ low temperature water and 45℃±1℃ raw gas reverse indirect heat exchange. The gas is cooled to 22°C, and the low temperature water is heated to 24°C, so that a large amount of heat in the raw gas cooling process is not fully utilized, resulting in a waste of energy. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a three-stage cooling method for coke oven raw gas which can be use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D1/04F28D7/00
Inventor 梅海芳范拴虎王战宽杨新廷曾喜文盖文廷
Owner SHIJIAZHUANG NEW CENTURY COAL CHEM IND GRP
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