浆液循环装置及燃煤电厂烟气脱硫系统
By using a slurry circulation device in the dual-tower series desulfurization process, mixing and diluting the slurry, and setting up circulation pipes and mixing components in the pre-washing tower and absorption tower, the problem of nozzle clogging caused by increased slurry viscosity was solved, thereby improving flue gas desulfurization efficiency and equipment operation stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGXIA FENGYE ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-07-08
- Publication Date
- 2026-07-17
AI Technical Summary
In the dual-tower series desulfurization process, the viscosity and solid content of the desulfurization slurry in the secondary absorption tower increase, which makes the nozzles of the spray layer prone to scaling and clogging, reducing the efficiency of flue gas scrubbing.
A slurry circulation device is adopted to transport the desulfurization slurry in the absorption tower to the mixer through the slurry pipeline to mix and dilute it with the process water, thereby adjusting the slurry concentration. Circulation pipelines and mixing components are set in the pre-washing tower and the absorption tower to ensure that the slurry viscosity is appropriate and to avoid nozzle clogging.
It significantly improves the removal rate of pollutants in flue gas, prevents nozzle clogging, and ensures the stability of desulfurization efficiency and the normal operation of the equipment.
Smart Images
Figure CN224506736U_ABST
Abstract
Claims
1. A slurry circulating device characterized by comprising: The system includes a pre-washing tower, an absorption tower, and a slurry pipeline. The exhaust port of the pre-washing tower is connected to the air inlet of the absorption tower. One end of the slurry pipeline is connected to the bottom outlet of the absorption tower, and the other end is connected to the spray inlet of the pre-washing tower. A mixer is installed on the slurry pipeline, and the mixer is connected to a water inlet pipe.
2. The slurry circulating device according to claim 1, wherein The mixer is a Venturi mixer.
3. The slurry circulating device according to claim 1, wherein The pre-washing tower has a first circulation pipe and a first extraction pipe. One end of the first circulation pipe is connected to the bottom outlet of the pre-washing tower, and the other end is connected to the spray inlet of the pre-washing tower. The first extraction pipe is connected to the bottom outlet of the pre-washing tower.
4. The slurry circulating device according to claim 1, wherein The absorption tower has a second circulation pipe and a second extraction pipe. One end of the second circulation pipe is connected to the bottom outlet of the absorption tower, and the other end is connected to the spray inlet of the absorption tower. The second extraction pipe is connected to the bottom outlet of the absorption tower.
5. The slurry circulating device according to claim 1, wherein It also includes a slurry mixing component, the outlet of which is connected to the spray inlet of the absorption tower.
6. The slurry circulating device according to claim 5, wherein The slurry mixing assembly includes a slurry tank, a stirring assembly, and a moving assembly. The moving assembly is slidably disposed in the slurry tank, and the stirring assembly is disposed in the moving assembly and is at least partially located inside the slurry tank. The moving assembly drives the stirring assembly to perform linear reciprocating motion along the length of the slurry tank to stir the material inside the slurry tank. The stirring assembly includes a connecting rod, several homogenizing rods, and several pushers. The connecting rod is disposed on the moving assembly and spans across the pulping tank. The several homogenizing rods are arranged vertically in an array on the connecting rod and extend into the pulping tank. The several pushers are disposed one-to-one at the bottom end of the several homogenizing rods and are in contact with the inner bottom of the pulping tank.
7. The slurry circulating device according to claim 6, wherein The material pushing component includes a scraping part and a pushing part. The pushing part is connected to the bottom end of the homogenizing rod. The scraping part is provided at the end of the pushing part away from the homogenizing rod. The scraping part is in contact with the inner bottom of the pulping box.
8. The slurry circulating device according to claim 6, wherein Each of the homogenizing rods has several stirring blades arranged alternately along its height direction.
9. The slurry circulating device according to claim 6, wherein The moving component includes a gantry frame, drive wheels, and two guide rails. The gantry frame is erected on the pulping tank along the width direction of the pulping tank. The two guide rails are arranged in parallel and installed at the bottom of the tank along the length direction of the pulping tank. The drive wheels are located at the bottom ends of the vertical beams on both sides of the gantry frame and are embedded in the guide grooves of the guide rails. The connecting rod is horizontally arranged on the crossbeam of the gantry frame.
10. A flue gas desulfurization system for a coal-fired power plant, characterized by, Includes the slurry circulation device according to any one of claims 1 to 9.