Smooth dry distillation furnace ash cooling and waste heat cascade recovery system and method based on air-water co-cooling

Abstract

The invention relates to a system and a method for smoothing ash cooling and waste heat gradient recovery of a dry distillation furnace based on air-water co-cooling. The system is characterized by comprising an air-water co-cooling roller slag cooler, a hot air purifying, tempering and recycling unit and a hot water gradient utilization unit. According to the core structure of the air-water co-cooling type roller slag cooler, an air-cooling flow channel and a water-cooling pipe bundle are integrally arranged in the air-water co-cooling type roller slag cooler at the same time, and the air-cooling flow channel and the water-cooling pipe bundle form a specific relative position relation with the shoveling plate and the ash flowing direction The hot air purifying, tempering and recycling unit is used for purifying, tempering and recycling the hot air produced by the slag cooler; and the hot water gradient utilization unit is used for carrying out gradient distribution on hot water produced by the water-cooling tube bundle. In order to solve the problems that an existing smooth dry distillation furnace ash cooling system adopts a single spraying water cooling mode, a large amount of sewage is easily generated, and water resources are seriously wasted, an air-water co-cooling type roller slag cooler is adopted for collaborative cooling, and cooling and heating loads are dynamically regulated and controlled, so that the cooling and waste heat recovery efficiency can be improved, sewage generation is reduced, and the water resources are saved; and energy conservation, consumption reduction and efficient utilization of resources are realized.

Description

Technical Field

[0001] This invention relates to the technical field of distillation furnace equipment, waste heat recovery and ash cooling, and specifically to a system and method for cooling ash and slag and recovering waste heat in a Fushun distillation furnace based on air-water co-cooling. Background Technology

[0002] The Fushun-type dry distillation furnace is the core equipment for the dry distillation and upgrading of oil shale. The high-temperature ash slag it produces carries a large amount of waste heat. Ash slag cooling and waste heat recovery are key links to ensure the continuous and stable operation of the dry distillation furnace and improve energy utilization efficiency. It is widely used in the dry distillation production process in energy, chemical and other industries.

[0003] Currently, most existing ash and slag cooling systems in Fushun distillation furnaces employ a single spray water cooling method. This method suffers from fluctuations in cooling efficiency due to variations in spray water volume and distribution uniformity. Furthermore, the waste heat recovery process is limited in its methods and has a low utilization rate. Additionally, the spray water cooling process generates a large amount of wastewater containing impurities, which is difficult and costly to treat, and also results in significant water consumption and waste. Moreover, traditional cooling systems lack dynamic load control capabilities and cannot flexibly adjust the cooling load ratio according to changes in operating conditions, further hindering the system's energy conservation, consumption reduction, and efficient resource utilization. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing ash and slag cooling systems for Fushun distillation furnaces, which mostly employ a single spray water cooling mode. Specifically, these systems easily generate large amounts of wastewater containing impurities, leading to difficult and costly subsequent treatment and significant water waste. Furthermore, the waste heat recovery methods are limited, resulting in low recovery rates and a lack of effective dynamic load control mechanisms, making it impossible to adapt to changes in operating conditions and adjust the cooling load accordingly. This invention provides a Fushun distillation furnace ash and slag cooling and waste heat cascade recovery system and method based on air-water co-cooling. By integrating an air-water co-cooled drum ash cooler, a hot air purification and conditioning reuse unit, and a hot water cascade utilization unit, and in conjunction with a dynamic load control mechanism, it achieves efficient ash and slag cooling, reduces wastewater generation, saves water resources, and enables cascade recovery of waste heat. The hot air generated by the air cooling system can be recycled after treatment by the hot air purification and conditioning reuse unit, further improving energy recovery and utilization rates to achieve the goals of energy conservation, consumption reduction, and efficient resource utilization. To achieve the above objectives, this invention provides the following technical solutions.

[0005] A system and method for cooling ash and cascaded recovery of waste heat from a Fushun dry distillation furnace based on air-water co-cooling includes an air-water co-cooled drum ash cooler, a hot air purification and conditioning reuse unit, and a hot water cascaded utilization unit. The air outlet of the air-water co-cooled drum ash cooler is connected to the hot air purification and conditioning reuse unit, and the water outlet is connected to the hot water cascaded utilization unit. The system realizes the distribution and adjustment of air-cooling and water-cooling loads through a dynamic control module.

[0006] The air-water co-cooled drum slag cooler includes a drum shell, a water-cooled tube bundle and an air-cooled flow channel disposed in the interlayer of the drum shell, and a high-efficiency anti-sticking plate inside the drum.

[0007] Both the inlet and outlet of the water-cooled tube bundle adopt rotary bidirectional joints. The air-cooled flow channel flows around the water-cooled tube bundle in the interlayer. The relative positions of the two with the lifting plate meet the requirements of uniform heat exchange of ash and slag.

[0008] The hot air purification and conditioning reuse unit is used to remove dust and condition the hot air produced by the air-water co-cooled drum slag cooler. The purified hot air can be reused for combustion in the dry distillation furnace or other process heat applications.

[0009] The hot water cascade utilization unit is used to distribute the hot water produced by the water-cooled tube bundle in a cascade manner, giving priority to meeting the high-grade heat demand scenarios, and then using the remaining heat for low-grade heat use scenarios, so as to achieve efficient cascade utilization of heat energy.

[0010] The dynamic control module can dynamically allocate and adjust the load ratio of air cooling and water cooling based on the ash temperature, the heat demand signals of the downstream hot air and hot water, and coordinate the operation status of the hot air purification and conditioning reuse unit and the hot water cascade utilization unit.

[0011] The high-efficiency anti-sticking lifting plate of the air-water co-cooled drum slag cooler is made of anti-sticking and wear-resistant material, which can prevent ash and slag from sticking and accumulating, and further ensure the uniformity of ash and slag heat exchange and the stability of equipment operation.

[0012] The aforementioned system and method for cooling ash and slag and recovering waste heat from a Fushun dry distillation furnace based on air-water co-cooling achieves synergistic optimization of ash and slag cooling and waste heat recovery through an integrated architecture of "air-water co-cooled drum ash cooler + hot air purification and conditioning reuse + hot water cascade utilization". Its core equipment, the air-water co-cooled drum ash cooler, effectively improves cooling efficiency and waste heat recovery level through the integrated arrangement of air-cooled flow channels and water-cooled tube bundles, combined with dynamic load control, ultimately achieving energy saving, consumption reduction and efficient resource utilization of the system. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the Fushun dry distillation furnace ash and slag cooling and waste heat cascade recovery system and method based on air-water co-cooling.

[0014] Figure 2 This is a schematic diagram of the ash and slag cooling and waste heat recovery system of a Fushun-type dry distillation furnace based on air-water co-cooling.

[0015] Figure 3 This is a schematic diagram of a wind-water co-cooled drum slag cooler.

[0016] Figure 4 This is a schematic diagram of a hot air purification, conditioning, and recycling unit.

[0017] Figure 5 This is a schematic diagram of a hot water cascade utilization unit.

[0018] Figure 6 This is a schematic diagram of the internal water-cooled piping of a combined air-water cooled drum slag cooler.

[0019] Figure 7 This is a schematic diagram of the internal air-cooled flow channel of the jacket of a wind-water co-cooled drum slag cooler.

[0020] Figure 8 This is a schematic diagram of the air distribution holes in the internal air-cooled flow channel of a combined air-water cooling drum slag cooler.

[0021] Figure 9 This is a schematic diagram of the internal lifting plate of a wind-water co-cooled drum slag cooler.

[0022] The diagram shows: 100, co-cooled drum slag cooler; 200, hot water cascade utilization unit; 300, hot air purification and conditioning reuse unit; 1, Fushun-type dry distillation furnace; 2, slag inlet; 3, air outlet equipment; 4, co-cooled drum slag cooler; 4-1, air distribution hole; 4-2, lifting plate; 5, air inlet equipment; 6, slag outlet; 7, water-cooled pipe; 8, bidirectional rotary joint; 8-1, water inlet; 8-2, water outlet; 9, cyclone dust collector; 10, high-temperature bag filter dust collector; 11, temperature and humidity control equipment; 12, intelligent air volume load distribution throttle valve; 13, intelligent flow load distribution throttle valve; 14, hot water waste heat utilization system. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 The diagram shows a schematic of a system and method for cooling ash and cascaded recovery of waste heat in a Fushun dry distillation furnace based on air-water co-cooling, including an air-water co-cooled drum ash cooler 100, a hot air purification and conditioning reuse unit 300, and a hot water cascaded utilization unit 200.

[0025] like Figure 2 The schematic diagram shown is of the composition principle of the ash and slag cooling and waste heat cascade recovery system of the Fushun-type dry distillation furnace based on air-water co-cooling, including: Fushun-type dry distillation furnace 1, slag inlet 2, air outlet equipment 3, air-water co-cooled drum slag cooler 4, slag outlet 6, water-cooled pipe 7, bidirectional rotary joint 8, cyclone dust collector 9, high-temperature bag dust collector 10, temperature and humidity control equipment 11, intelligent air volume load distribution throttle valve 12, intelligent flow load distribution throttle valve 13, hot water waste heat utilization system 14.

[0026] like Figure 3The schematic diagram of the air-water co-cooled drum slag cooler shown includes: slag inlet 2, air outlet 3, air-water co-cooled drum slag cooler 4, air inlet 5, slag outlet 6, water-cooled pipe 7, and bidirectional rotary joint 8.

[0027] The slag discharge end of the Fushun-type dry distillation furnace 1 is connected to the feed end of the air-water co-cooled drum slag cooler 4 through the slag inlet 2, and the slag discharge end of the air-water co-cooled drum slag cooler 4 is connected to the slag outlet 6.

[0028] like Figure 4 The schematic diagram of the hot air purification, conditioning and reuse unit shown includes: air outlet equipment 3, cyclone dust collector 9, high temperature bag dust collector 10, temperature and humidity control equipment 11, and intelligent air volume load distribution throttling valve 12.

[0029] The air outlet of the air outlet device 3 is connected in sequence to the cyclone dust collector 9, the high-temperature bag dust collector 10, and the temperature and humidity control device 11.

[0030] like Figure 5 The schematic diagram of the hot water cascade utilization unit shown includes: water-cooled pipe 7, bidirectional rotary joint 8, intelligent flow load distribution throttling valve 13, and hot water waste heat utilization system 14.

[0031] The outlet 8-2 of the bidirectional rotary joint 8 is connected to the inlet of the hot water waste heat utilization system 14.

[0032] like Figure 6 The schematic diagram of the internal water-cooled pipes of the air-water co-cooled drum slag cooler shown includes: water-cooled pipe 7, bidirectional rotary joint inlet 8-1, and bidirectional rotary joint outlet 8-2.

[0033] The air-water co-cooled drum slag cooler 4 has a water-cooled pipe 7 installed in the interlayer, and the two ends of the water-cooled pipe 7 are connected to the inlet of the bidirectional rotary joint 8-1 and the outlet of the bidirectional rotary joint 8-2.

[0034] like Figure 7 The diagram shown is a schematic of the internal air-cooled flow channel of the air-cooled drum slag cooler jacket, including: air-cooled drum slag cooler 4 and air distribution hole 4-1.

[0035] The air inlet device 5 directs air through the air distribution hole 4-1 and the air-cooled flow channel from the air outlet device 3 to the hot air purification, conditioning and recycling unit 300.

[0036] like Figure 8 The diagram shown is a schematic of the air distribution holes in the internal air-cooled flow channel of the air-water co-cooled drum slag cooler jacket, including: air distribution hole 4-1.

[0037] like Figure 9 The diagram shown is of the internal lifting plate principle of the air-water co-cooled drum slag cooler, including: air-water co-cooled drum slag cooler 4, lifting plate 4-2.

[0038] The inner wall of the air-water co-cooled drum slag cooler 4 is uniformly provided with lifting plates 4-2.

[0039] When the ash and slag produced by the Fushun-type dry distillation furnace 1 enters the air-water co-cooled drum slag cooler 4 through the slag inlet 2, the drum rotation drives the lifting plates 4-2 to agitate the ash and slag; the cold air delivered by the air inlet equipment 5 enters the jacket through the air-cooled flow channel and air distribution hole 4-1, and indirectly exchanges heat with the ash and slag; the medium in the water-cooled pipe 7 enters through the water inlet 8-1 of the bidirectional rotary joint 8, and indirectly exchanges heat with the ash and slag; the hot air after heat exchange enters the hot air purification and conditioning reuse unit 300 through the air outlet equipment 3, and is reused after dust removal, temperature and humidity adjustment; the intelligent air volume load distribution throttle valve 12 adjusts the load distribution by adjusting the air cooling flow rate, and the hot water after heat exchange enters the hot water waste heat utilization system 14 through the water outlet 8-2 of the bidirectional rotary joint 8 for cascade utilization; the intelligent flow load distribution throttle valve 13 adjusts the load distribution by adjusting the water cooling flow rate, and the finally cooled ash and slag is discharged through the slag outlet 6.

Claims

1. A system and method for cooling ash and slag and recovering waste heat in a Fushun dry distillation furnace based on combined air and water cooling, characterized in that: The system includes a combined air-cooled and water-cooled drum slag cooler, a hot air purification and conditioning reuse unit, and a hot water cascade utilization unit. The air outlet of the combined air-cooled and water-cooled drum slag cooler is connected to the hot air purification and conditioning reuse unit, and the water outlet is connected to the hot water cascade utilization unit. The system uses a dynamic control module to distribute and regulate the air-cooling and water-cooling loads.

2. The system and method for cooling ash and slag and recovering waste heat from a Fushun dry distillation furnace based on air-water co-cooling as described in claim 1, characterized in that: The air-water co-cooled drum slag cooler includes a drum shell, a water-cooled tube bundle and an air-cooled flow channel disposed in the interlayer of the drum shell, and a high-efficiency anti-sticking plate inside the drum.

3. The system and method for cooling ash and slag and recovering waste heat in a Fushun dry distillation furnace based on air-water co-cooling as described in claim 2, characterized in that: Both the inlet and outlet of the water-cooled tube bundle adopt rotary bidirectional joints. The air-cooled flow channel flows around the water-cooled tube bundle in the interlayer. The relative positions of the two with the lifting plate meet the requirements of uniform heat exchange of ash and slag.

4. The system and method for cooling ash and slag and recovering waste heat in a Fushun dry distillation furnace based on air-water co-cooling as described in claim 1, characterized in that: The hot air purification, conditioning and reuse unit includes dust removal equipment, temperature and humidity conditioning device and hot air reuse pipeline.

5. The system and method for cooling ash and slag and recovering waste heat in a Fushun dry distillation furnace based on air-water co-cooling as described in claim 1, characterized in that: The hot water cascade utilization unit includes a hot water and heat utilization system, a heat demand matching module, and a water supply pipeline.

6. The system and method for cooling ash and slag and recovering waste heat in a Fushun dry distillation furnace based on air-water co-cooling as described in claim 1, characterized in that: The dynamic control module includes an intelligent air volume load distribution throttle valve and an intelligent flow load distribution throttle valve, which can dynamically adjust the load ratio of air cooling and water cooling according to the ash temperature and downstream heat demand.

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