一种耦合水蒸气压缩机的气化黑水余热多级利用系统
By using a multi-stage utilization system for waste heat from gasified black water coupled with a steam compressor, the problem of unrecovered waste heat from gasified black water in coal chemical industry has been solved. This system enables the cascade utilization of waste heat from black water and provides steam and heat supply, optimizes the production process, reduces energy and water consumption, and ensures the safe operation of equipment and the stable operation of water treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG GUOSHUN CONSTR GRP
- Filing Date
- 2025-07-30
- Publication Date
- 2026-07-17
AI Technical Summary
In existing coal chemical production, the low- and medium-temperature waste heat from gasification black water has not been effectively recovered and utilized, resulting in energy waste and difficulties in water treatment. Furthermore, the waste steam condenser is prone to scaling, the vacuum pump has low efficiency, and the ash water temperature is too high, posing safety hazards.
A multi-stage utilization system for waste heat from gasified black water using a coupled steam compressor cools the black water and generates high-grade steam through a low-pressure flash tank, a vacuum flash tank, and a primary heat exchange unit. The steam compressor further enhances the steam grade, enabling the cascade utilization of waste heat and the supply of steam and heat.
It effectively recovers waste heat from black water, reduces production costs, improves energy efficiency, solves the problems of inadequate black water cooling and unrecovered waste heat, ensures normal operation of water treatment, reduces equipment scaling and maintenance workload, and provides low-pressure steam supply.
Smart Images
Figure CN224516747U_ABST
Abstract
Claims
1. A multi-stage utilization system for waste heat from gasified black water coupled with a steam compressor, characterized in that, include: Low-pressure flash tank, vacuum flash tank, primary heat exchange unit and primary industrial steam supply unit; The primary heat exchange unit has a black water channel and a heat transfer medium water channel. The black water outlet of the low-pressure flash tank is connected to the black water channel inlet of the primary heat exchange unit, and the black water channel outlet of the primary heat exchange unit is connected to the black water inlet of the vacuum flash tank. The heat transfer medium water channel outlet of the primary heat exchange unit is connected to the inlet of the primary industrial steam supply unit. The primary industrial steam supply unit includes a steam generator and a steam compressor. The steam outlet of the steam generator is connected to the inlet of the steam compressor, and the outlet of the steam compressor is connected to the primary industrial steam supply user.
2. The black water waste heat multi-stage utilization system coupled with a water vapor compressor according to claim 1, wherein, The primary industrial steam supply unit also includes a steam-water separator, which is located between the steam outlet of the steam generator and the inlet of the steam compressor.
3. The black water waste heat multi-stage utilization system coupled with a water vapor compressor according to claim 1, wherein It also includes a heat transfer fluid pump, the inlet of which is connected to the outlet of the steam generator, and the outlet of which is used to connect to a downstream unit.
4. The black water waste heat multi-stage utilization system coupled with a water vapor compressor according to claim 3, wherein It also includes a secondary industrial heating unit, the inlet of which is connected to the outlet of the heat medium pump, and the outlet of which is used to connect to downstream units; the secondary industrial heating unit includes a secondary heat exchange unit, which is provided with a heating medium channel for supplying heat to secondary industrial heating users.
5. The black water waste heat multi-stage utilization system coupled with a water vapor compressor according to claim 4, wherein It also includes a three-stage centralized heating unit, the inlet of which is connected to the outlet of the first-stage industrial steam supply unit, and the outlet of which is connected to the inlet of the heat medium water channel of the first-stage heat exchange unit; the three-stage centralized heating unit includes a three-stage heat exchange unit, and the three-stage heat exchange unit is provided with a heating medium channel for supplying heat to the three-stage centralized heating users.
6. The black water waste heat multi-stage utilization system coupled with a water vapor compressor according to claim 5, wherein A first electric valve is installed on the connecting pipe between the low-pressure flash tank and the black water channel inlet of the first-stage heat exchange unit. A second electric valve is installed on the connecting pipe between the black water channel outlet of the first-stage heat exchange unit and the black water inlet of the vacuum flash tank. A parallel pipe is installed between the black water outlet of the low-pressure flash tank and the black water inlet of the vacuum flash tank, and a third electric valve is installed on the parallel pipe.
7. The black water waste heat multi-stage utilization system coupled with a water vapor compressor according to claim 1, wherein The primary heat exchange unit is a fully welded plate heat exchanger.
8. The black water waste heat multi-stage utilization system coupled with a water vapor compressor according to claim 1, wherein, An online water quality monitoring instrument is installed at the outlet of the heat medium water channel of the primary heat exchange unit.
9. The black water waste heat multi-stage utilization system coupled with a water vapor compressor according to claim 1, wherein, It also includes a water supply tank and a water supply pump, with the inlet of the water supply pump connected to the water supply tank and the outlet of the water supply pump connected to the primary heat exchange unit.
10. The black water waste heat multi-stage utilization system coupled with a water vapor compressor according to claim 2, wherein The primary industrial steam supply unit further includes a steam pre-drying and buffering unit, which is located between the steam-water separator and the steam compressor. The steam pre-drying and buffering unit includes a steam buffer tank and an electric heating dehumidifier. The outlet of the steam-water separator is connected to the inlet of the steam buffer tank, the vapor phase outlet of the steam buffer tank is connected to the inlet of the electric heating dehumidifier, and the outlet of the electric heating dehumidifier is connected to the inlet of the steam compressor.