Dry-quenching deaerator steam-exhaust recovery system
A technology of spent steam recovery and deaerator, applied in the field of coking dry quenching, can solve the problem of wasting steam heat energy and other problems, and achieve the effects of reducing heat, shortening heating time and high heat exchange rate
Pending Publication Date: 2018-06-01
QINGDAO SPECIAL STEEL CO LTD
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Problems solved by technology
[0003] Aiming at the technical problem of wasting steam and heat energy due to the waste steam of the deaerator, the present invention proposes a waste steam recovery of CDQ deaerator with reasonable structure, stable operation, which can effectively recycle and utilize the heat of the exhaust gas of the deaerator and recover condensed water system
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[0015] Example: such as figure 1 As shown, a CDQ deaerator exhaust steam recovery system includes a deaerator 1 , a exhaust steam recovery 2 , a desalinated water tank 3 and a feed water preheater 4 .
[0016] The deaerator 1 includes a water storage tank 11 and a heater 12. The upper end of the heater 12 is provided with an exhaust port 14 and a water filling port 13. The exhaust port 14 is connected with an exhaust port valve and a exhaust steam recovery pipe 15.
[0017] The exhaust steam recoverer 2 includes a shell, and the space inside the shell forms a recovery cavity. A steam diffuser 21 is installed at the bottom of the recovery chamber, and the inlet of the lower end of the steam diffuser 21 is connected with the exhaust steam recovery pipe 15 . The lower end of the steam diffuser is a straight pipe and the upper end is funnel-shaped, and its axial direction is installed perpendicular to the bottom wall of the shell. A coil heat exchanger 23 is installed on the upp...
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The invention provides a dry-quenching deaerator steam-exhaust recovery system. The dry-quenching deaerator steam-exhaust recovery system comprises a deaerator, a steam exhaust recoverer, a desaltingwater tank and a feedwater preheater; the steam exhaust recoverer comprises a shell, a recovery cavity is formed in the shell, a steam diffuser is mounted at the bottom of the recovery cavity, a heatexchanger is mounted on the upper portion of the recovery cavity, and condensate water is discharged to the desalting water tank; and the desalting water tank is connected to the heat exchanger, a water outlet of the heat exchanger is connected to a water inlet of the feedwater preheater through a pipeline, and a water outlet of the feedwater preheater is connected to a water inlet of the deaerator through a pipeline. According to the dry-quenching deaerator steam-exhaust recovery system, the self-designed steam exhaust recoverer is adopted, so that heat carried by steam exhaust is used for heating desalted water, meanwhile, the condensate water is collected to be recycled, and the energy utilization rate is increased; the steam exhaust makes full contact with a coiled pipe of the heat exchanger after being evenly diffused through the steam diffuser, the heat exchange rate is high, and the oxygen content is not increased; and the dry-quenching deaerator steam-exhaust recovery system can be formed by transforming through an existing dry-quenching deaerating device, running is stable, the heat utilization rate is increased, and energy conservation and emission reduction are achieved.
Description
technical field [0001] The invention belongs to the technical field of coking dry quenching, and in particular relates to a waste steam recovery system of a dry quenching deaerator. Background technique [0002] In the production process of coking CDQ, in order to ensure the water quality of the dry quenching boiler and avoid oxygen corrosion of the pipes and boiler tubes, it is necessary to deoxidize the boiler feed water. In the CDQ process, the thermal oxygen removal method is used as the main method, and chemical oxygen removal is supplemented at the same time, that is, steam is used to heat the feed water to the saturation temperature under the corresponding pressure. The water vapor pressure on the steam-water interface is the same as the external pressure, and other gases ( Including oxygen) the partial pressure is zero, that is, the gas dissolved in water cannot be dissolved in water and is removed. At the same time, hydrazine and other oxygen scavengers are added to...
Claims
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Login to View More IPC IPC(8): F22D1/50F22D1/00
CPCF22D1/003F22D1/50
Inventor 王永亮郭飞王志森何波
Owner QINGDAO SPECIAL STEEL CO LTD