Catalytic cracking flue gas precipitation and desulfuration cooperative treatment process
A catalytic cracking and flue gas technology, applied in chemical instruments and methods, dispersed particle separation, dispersed particle filtration, etc., can solve problems such as pipeline and equipment abrasion, affect process economy, and affect gypsum quality, so as to reduce operating costs, The by-products can be comprehensively utilized and the effect of reducing the water consumption of the system
Inactive Publication Date: 2015-10-14
中钢集团天澄环保科技股份有限公司
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Problems solved by technology
However, this method adopts the method of sedimentation to remove the dust in the slurry, which has poor effect and takes a long time, and the dust remaining in the slurry is easy to cause abrasion and blockage of pipelines and equipment; in addition, the dust remaining in the slurry will enter the final Among the by-products, the quality of gypsum is affected, thereby affecting the economics of the process
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[0027] The present invention will be further described below in conjunction with the accompanying drawings.
[0028] A catalytic cracking flue gas dedusting and desulfurization collaborative treatment process, comprising the following steps:
[0029] S1. Flue gas regenerated from catalytic cracking after waste heat utilization, the temperature is about 200-300°C. First, through the flue gas cooling device 1 (natural air cooler, forced air cooler or other types of heat exchangers can be used), the temperature of the flue gas is reduced to 150-200°C to prevent the flue gas with too high temperature from entering the bag type Damage to the filter bag after the dust collector. In addition, the flue gas cooling device has a temperature adjustment function, which can ensure that the flue gas temperature at the outlet of the flue gas cooling device is maintained at 150-200 °C when the production load changes and fluctuates in flue gas volume and flue temperature.
[0030] S2. The ...
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The invention relates to a catalytic cracking flue gas precipitation and desulfuration cooperative treatment process. The process comprises the following steps: cooling catalytic cracking regeneration flue gas after waste heat utilization to 150-200 DEG C by using a flue gas cooling device 1; removing dust out of flue gas by using a bag type dust collector; boosting high-temperature flue gas (with the temperature of 150-200 DEG C) coming from an outlet flue of the dust collector by using a booster fan 5, feeding the flue gas into a heat exchanger 6, exchanging heat with pure flue gas coming from the top of a desulfurizing tower 7, and then feeding into the desulfurizing tower 7 for desulfurization; in the desulfurizing tower 7, enabling desulfurization slurry and regenerated flue gas flowing from bottom to top to form reverse direct contact by utilizing a slurry circulating pump 8 and a spray layer 9, so as to remove sulfur dioxide out of flue gas; removing fog drips entrained in the flue gas by a demister 10 and then feeding flue gas into the heat exchanger 6 from an outlet flue at the top of an absorption tower; enabling pure flue gas entering the heat exchanger 6 to carry out heat exchanger with worm flue gas (with the temperature of 150-200 DEG C) coming from the boosting fan; and finally discharging from a chimney 11. The process is stable and reliable in operation, less waste water is produced, and byproducts can be comprehensively utilized.
Description
technical field [0001] The invention belongs to the technical field of prevention and control of catalytic cracking flue gas pollution in the petroleum refining industry, and specifically relates to a collaborative treatment process for catalytic cracking flue gas dust removal and desulfurization. Background technique [0002] Catalytic cracking is the main means of oil refining in my country, but it is also the main source of pollutant emissions from oil refining enterprises. With the increasing demand for oil from the development of the national economy, the amount of crude oil processed in my country's petroleum refining industry continues to increase, and at the same time the proportion of high-sulfur and heavy crude oil processed is also increasing, which also leads to SO emissions in the catalytic cracking production process. 2 , The concentration of dust is increasing, and the environmental pollution caused by it is also becoming more and more serious. [0003] Follo...
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Login to View More IPC IPC(8): B01D53/80B01D53/50B01D46/02
Inventor 朱俊杰姚群孙军军钱磊叶威
Owner 中钢集团天澄环保科技股份有限公司