Device and method for catalytic cracking flue desulfurizing and purified sewage recycling
A catalytic cracking and flue gas technology, applied in chemical instruments and methods, separation methods, neutralized water/sewage treatment, etc., can solve problems such as large waste, purified water can only be emptied, and unfavorable resource efficient utilization, etc., to reduce Effects of processing volume, consumption reduction, and emission reduction
Pending Publication Date: 2021-05-28
浙江石油化工有限公司
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Problems solved by technology
At present, the purified sewage produced by the sewage stripping device is not enough users, so the excess purified water can only be emptied, which is a big waste and is not conducive to the efficient use of resources
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[0028] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following examples.
[0029] Such as Figure 1-3 Shown is a specific embodiment of a device for catalytic cracking flue gas desulfurization and reuse of sewage purification, a device for catalytic cracking flue gas desulfurization and reuse of sewage purification, including a cooling absorption tower 1, a sewage purification pipeline 2, and a fresh water pipeline 3 , the purified sewage pipeline 2 and the fresh water pipeline 3 are connected to a supplementary water pump 4 after they are collected, and the cooling absorption tower 1 includes a horizontal quenching section of the cooling absorption tower, a quenching absorption liquid spraying section, and a filter module section from bottom to top , the horizontal quenching section of the cooling absorption tower includes several quenching nozzles spraying downwards, the qu...
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The invention discloses a device and a method for catalytic cracking flue desulfurizing and purified sewage recycling. The device is characterized in that a purified sewage pipeline and a fresh water pipeline are converged and then connected with a water supplementing pump, the water supplementing pump is communicated with a liquid collection box, a flue gas pipeline is communicated with a cooling absorption tower, a first pipeline is communicated with the tower kettle of the cooling absorption tower, the tower kettle of the cooling absorption tower is connected with a quenching absorption circulating pump, the quenching absorption circulating pump is connected with a quenching nozzle and an absorption nozzle, purified sewage is used for supplementing water to the liquid collection tank for flue gas desulfurization, the water enters the liquid collection box after passing through the purified sewage pump and overflows into a quenching absorption liquid, a small part is jetted by the quenching nozzle, a large part is jetted by the absorption nozzle, a high-density water curtain is formed by quenching water, high-temperature flue gas is adiabatic and saturated, and SO2 and the like in the flue gas are removed through the absorption liquid sprayed by the absorption nozzle, and particles and acid mist are removed by a cleaning spray head, water drops in the flue gas are separated, and the flue gas is discharged by a chimney, so that the purified sewage and the fresh water can be switched for use, the operation cost of the device can be reduced, and economic benefits are improved.
Description
technical field [0001] The invention relates to a device and method for purifying sewage, more specifically, to a device and method for purifying sewage by desulfurization of catalytic cracking flue gas, and belongs to the field of petrochemical industry. Background technique [0002] The current flue gas desulfurization system requires a large amount of fresh water and high operating costs. According to the flue gas desulfurization scale of the 4.5 million tons / year catalytic cracking unit, the water replenishment amount is as high as 76t / h, and it needs to be boosted by the water pump, and the cost of fresh water produced by the seawater desalination unit exceeds 5.5 yuan / ton, so the reduction Fresh water consumption is beneficial to control the operating cost of seawater desalination plant. At present, there are not enough users of purified sewage produced by sewage stripping devices, so the excess purified water can only be emptied, which is a big waste and is not condu...
Claims
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IPC IPC(8): C02F1/66B01D53/50B01D53/79B01D47/06C02F103/18
CPCB01D53/79B01D53/50B01D47/06C02F1/66C02F2103/18
Inventor 魏文田海波隋建国高登志刘松卢喜洋孙委赖伟林王玉彬
Owner 浙江石油化工有限公司