Sintering mixed material water replenishing gradient utilization and waste heat utilization system
By using a cascade utilization and waste heat utilization system, the problems of high water source cost and insufficient waste heat utilization in the sintering mixing water supply system have been solved, realizing efficient utilization of water resources and improving the uniformity and durability of sintering mixtures, while reducing the system's operation and construction costs.
Patent Information
- Application Number
- CN202422900946.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Existing sintering mixing water supply systems suffer from high water source costs, wasteful steam energy consumption of water temperature raising devices, high construction costs, high daily operating electricity consumption, and high maintenance costs.
The system employs a blast furnace slag flushing water heat exchanger, a primary heating network unit, and a sintering mixing water replenishment unit. Through equipment such as slag water circulation pumps, heat pumps, and sludge pumps, it achieves cascade utilization of water resources and efficient conversion of waste heat, reducing investment and operating costs of wastewater treatment facilities, and utilizing the waste heat of slag flushing water to heat the sintering mixture.
This approach enables the cascade utilization of water resources, reduces wastewater treatment costs, conserves high-quality water sources, improves the uniformity and durability of sintering mixes, shortens sintering time, and reduces steam energy waste and facility construction and operation costs.
Smart Images
Figure CN223512526U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of sintering mixing water replenishment technology, and in particular relates to a cascade utilization and waste heat utilization system for sintering mixing water replenishment. Background Technology
[0002] Adding water to the sintering mixture is a common process. By adding water, the density, formability, sintering reaction, and surface quality of the material are improved, thereby enhancing material performance and processing efficiency. Using hot water to mix the sintering mixture can accelerate the sintering process and shorten the sintering time. Because the temperature of hot water is higher than room temperature, it can accelerate the bonding of the materials, making the mixed sintering mixture harder and more durable. In addition, hot water can increase the evaporation rate of moisture in the mixture, contributing to the formation of a more uniform material.
[0003] Most steel companies use self-supplied production fire water or treated recycled production water for sintering and mixing. The water quality of these two sources is good, but the production or treatment costs are high. In addition, the methods to increase the water temperature are mostly low-temperature and low-pressure steam heating in the plant area or low-temperature waste heat induced by the third and fourth stages of the ring cooler. The former causes steam energy waste, which is uneconomical and environmentally unfriendly, while the latter has higher construction costs, daily operating power consumption, and maintenance costs. Utility Model Content
[0004] The purpose of this invention is to provide a cascade utilization system for sintering mixing water replenishment and waste heat utilization, which solves the problems of high water source costs, waste of steam energy in water temperature raising devices, or high construction costs, daily operating power consumption, and maintenance costs.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A sintering mixing water cascade utilization and waste heat utilization system includes a blast furnace slag flushing water heat exchanger unit, a primary heating network unit, and a sintering mixing water supply unit. The blast furnace slag flushing water heat exchanger unit includes a slag water circulation pump. Both the input and output ends of the slag water circulation pump are connected to regulating ball valves. The output regulating ball valve is connected to a wide-channel slag water heat exchanger via an output pipeline. The input end of the wide-channel slag water heat exchanger is connected to a regulating valve, and the output end of the wide-channel slag water heat exchanger is connected to a slag water circulation tank. The input end of the primary heating network unit is sequentially connected to the wide-channel slag water heat exchanger and the wide-channel mixing water supply unit via pipelines. The heat exchanger, the sintering mixing water supply unit includes a circulating sedimentation tank and a sludge pump. The input end of the circulating sedimentation tank is connected to the flue gas spray circulating water, the dust removal process wastewater, and the indoor water ditch slurry. A spray circulating pump is installed between the flue gas spray circulating water and the circulating sedimentation tank. The output end of the circulating sedimentation tank is connected to the sludge pump. Both the input and output ends of the sludge pump are connected to regulating ball valves. The regulating ball valve at the output end is connected to a wide-channel mixing heat exchanger through an output pipeline. The input end of the wide-channel slag-water heat exchanger is connected to a regulating valve. The output end of the wide-channel slag-water heat exchanger is connected to the sintering mixing tank through a pipeline.
[0007] Preferably, the primary heating network unit includes a heat pump, the input and output ends of which are connected to regulating ball valves. The regulating ball valve at the output end is connected to a wide-channel slag-water heat exchanger via an output pipeline. The input end of the wide-channel slag-water heat exchanger is connected to a regulating valve, and the output end of the wide-channel slag-water heat exchanger is connected to a wide-channel mixing heat exchanger. The input and output ends of the wide-channel mixing heat exchanger are both connected to butterfly valves, and the output end of the wide-channel mixing heat exchanger is connected to the heating user via a pipeline.
[0008] Preferably, the slag-water circulation pump is configured with one pump in use and one on standby, with the pump in use and the standby pump connected in parallel.
[0009] Preferably, the heat pump is configured with one operating pump and one standby pump, with the operating pump and the standby pump connected in parallel.
[0010] Preferably, the sludge pump is configured with one pump in use and one on standby, with the pump in use and the standby pump connected in parallel.
[0011] Preferably, the flow rate of the slurry pump is 25T / h-30T / h.
[0012] The beneficial effects achieved by this utility model are as follows:
[0013] (1) The flue spray circulating water, dust removal process wastewater, indoor water ditch slurry and other components are complex. According to environmental protection requirements, external discharge is prohibited. The solid waste treatment operation cost is high. The pipelines of flue spray circulating water, dust removal process wastewater and indoor water ditch slurry are modified to introduce a circulating sedimentation tank. The supernatant in the circulating sedimentation tank is returned to the circulating tank for spray dust removal through the spray circulation pump. The sediment slurry in the lower part is pressurized and then co-sintered and mixed for use. This realizes the cascade utilization of water resources, reduces the investment in wastewater treatment process facilities and daily operating costs, meets the requirements of sintering production, avoids the waste of good water quality, reduces costs, and saves energy and protects the environment.
[0014] (2) Blast furnace slag flushing water is a low-temperature waste heat source with stable temperature, large flow rate, and large heat content. The heating load of the general plant office building is relatively small, and the waste heat capacity of the slag flushing water cannot be fully utilized. The wide-channel slag water heat exchanger and the wide-channel mixing heat exchanger are used for energy conversion to heat the sintering mixing water, making the formed sintering mixture more uniform and hard, and more durable. At the same time, the sintering time is shortened and the efficiency is improved. There is no need to use a steam heat exchanger, which reduces the waste of steam energy. There is also no need to build an induced draft heating system, which reduces construction costs, daily operating power consumption, and maintenance costs.
[0015] (3) The slag water circulation pump, heat pump and sludge discharge pump are all used in a one-to-one standby manner to prevent production stoppage due to damage to one of the pumps. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model.
[0017] Explanation of reference numerals in the attached diagram: 1. Blast furnace slag flushing water heat exchanger unit; 11. Slag water circulation pump; 12. Regulating ball valve one; 13. Regulating valve one; 14. Slag water circulation tank; 2. Heating primary network unit; 21. Heat pump; 22. Regulating ball valve two; 23. Regulating valve two; 24. Heating user; 3. Sintering mixing water supply unit; 31. Circulating sedimentation tank; 32. Sludge pump; 33. Flue gas spray circulating water; 34. Dust removal process wastewater; 35. Indoor water ditch slurry; 36. Spray circulating pump; 37. Regulating ball valve three; 38. Regulating valve three; 39. Sintering mixing tank; 4. Wide-channel slag water heat exchanger; 5. Wide-channel mixing heat exchanger; 6. Butterfly valve. Detailed Implementation
[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.
[0019] like Figure 1As shown, a sintering mixing water cascade utilization and waste heat utilization system includes a blast furnace slag flushing water heat exchanger unit 1, a primary heating network unit 2, and a sintering mixing water supply unit 3. The blast furnace slag flushing water heat exchanger unit 1 includes a slag water circulation pump 11, with both its input and output ends connected to regulating ball valves 12. The slag water circulation pump 11 is configured with one pump in operation and one on standby, connected in parallel. The regulating ball valve 12 at the output end is connected to a wide-channel slag water heat exchanger 4 via an output pipeline. The input end of the wide-channel slag water heat exchanger 4 is connected to a regulating valve 13, and its output end is connected to a slag water circulation tank 14. The primary heating network unit 2 includes a heat pump 21, with the input end of the heat pump 21 and... All output ends are connected to regulating ball valve 22. Heat pump 21 is configured with one operating pump and one standby pump connected in parallel. Regulating ball valve 22 at the output end is connected to the wide-channel slag-water heat exchanger 4 through the output pipeline. The input end of the wide-channel slag-water heat exchanger 4 is connected to regulating valve 23. The output end of the wide-channel slag-water heat exchanger 4 is connected to the wide-channel mixing heat exchanger 5. Both the input and output ends of the wide-channel mixing heat exchanger 5 are connected to butterfly valve 6. The output end of the wide-channel mixing heat exchanger 5 is connected to the heating user 24 through a pipeline. Taking advantage of the stable temperature and large flow rate of blast furnace flushing water, heat exchange is carried out through the wide-channel slag-water heat exchanger. The technology is simple, the transformation cost is very low, and waste heat is fully utilized for heating, avoiding the waste of thermal energy.
[0020] The sintering mixing water supply unit 3 includes a circulating sedimentation tank 31 and a slurry pump 32. The input end of the circulating sedimentation tank 31 is connected to the flue gas spray circulating water 33, the dust removal process wastewater 34, and the indoor water ditch slurry 35. A spray circulating pump 36 is installed between the flue gas spray circulating water 33 and the circulating sedimentation tank 31. The output end of the circulating sedimentation tank 31 is connected to the slurry pump 32. Both the input and output ends of the slurry pump 32 are connected to regulating ball valves 37. The slurry pump 32 is operated with one pump in use and one in standby mode, and the operating pump and the standby pump are connected in parallel. The flow rate of the slurry pump 37 is 30T / h. The regulating ball valve 37 at the output end is connected to the wide flow channel mixer through the output pipeline. Heat exchanger 5, the input end of the wide-channel slag-water heat exchanger 5 is connected to regulating valve 38, and the output end of the wide-channel slag-water heat exchanger 5 is connected to sintering mixing tank 39 through pipeline; the flue spray circulating water, dust removal process wastewater and the lower sediment slurry of indoor water ditch slurry are pressurized and used for co-sintering and mixing, realizing wastewater reuse and cascade utilization of water resources, while saving water with better water quality, reducing costs, and being energy-saving and environmentally friendly; the wide-channel slag-water heat exchanger and the wide-channel mixing heat exchanger are used for energy conversion to heat the sintering mixing water, increase the evaporation rate of water in the mixture, form a uniform sintering mixture, and accelerate condensation, making the sintering mixture harder and more durable.
Claims
1. A cascade utilization system for sintering mixing water and waste heat utilization, comprising a blast furnace slag flushing water heat exchanger unit and a primary heating network unit, characterized in that, It also includes a sintering mixing water supply unit. The blast furnace slag flushing water heat exchanger unit includes a slag water circulation pump. Both the input and output ends of the slag water circulation pump are connected to regulating ball valves. The output regulating ball valve is connected to a wide-channel slag water heat exchanger via an output pipeline. The input end of the wide-channel slag water heat exchanger is connected to a regulating valve, and the output end of the wide-channel slag water heat exchanger is connected to a slag water circulation tank. The input end of the primary heating network unit is connected sequentially to the wide-channel slag water heat exchanger and the wide-channel mixing heat exchanger via pipelines. The sintering mixing water supply unit includes a circulating sedimentation system. The circulating sedimentation tank is equipped with a water tank and a sludge pump. The input end of the circulating sedimentation tank is connected to the flue gas spray circulating water, the dust removal process wastewater, and the indoor water ditch slurry. A spray circulating pump is installed between the flue gas spray circulating water and the circulating sedimentation tank. The output end of the circulating sedimentation tank is connected to the sludge pump. Both the input and output ends of the sludge pump are connected to regulating ball valves. The regulating ball valve at the output end is connected to a wide-channel mixing heat exchanger through an output pipeline. The input end of the wide-channel slag-water heat exchanger is connected to a regulating valve. The output end of the wide-channel slag-water heat exchanger is connected to the sintering mixing tank through a pipeline.
2. The sintering mixing water replenishment and waste heat utilization system according to claim 1, characterized in that, The primary heating network unit includes a heat pump. Both the input and output ends of the heat pump are connected to regulating ball valves. The regulating ball valve at the output end is connected to a wide-channel slag-water heat exchanger via an output pipeline. The input end of the wide-channel slag-water heat exchanger is connected to a regulating valve. The output end of the wide-channel slag-water heat exchanger is connected to a wide-channel mixing heat exchanger. Both the input and output ends of the wide-channel mixing heat exchanger are connected to butterfly valves. The output end of the wide-channel mixing heat exchanger is connected to the heating user via a pipeline.
3. The sintering mixing water replenishment and waste heat utilization system according to claim 2, characterized in that, The slag and water circulation pump is configured with one pump in use and one on standby, and the working pump and the standby pump are connected in parallel.
4. The sintering mixing water replenishment and waste heat utilization system according to claim 3, characterized in that, The heat pump is configured with one operating pump and one standby pump, connected in parallel.
5. A sintering mixing water replenishment and waste heat utilization system according to claim 4, characterized in that, The mud pump is configured with one pump in use and one on standby, and the working pump and the standby pump are connected in parallel.
6. The sintering mixing water replenishment and waste heat utilization system according to claim 5, characterized in that, The flow rate of the slurry pump is 25T / h-30T / h.