Cyclone drying system converts hot water circulating device
By introducing a conversion hot water circulation device into the cyclone drying system, the conversion hot water from the vinyl chloride workshop is used for air heating, which solves the problem of high medium-pressure steam consumption and achieves efficient energy utilization and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 新疆圣雄氯碱有限公司
- Filing Date
- 2025-08-05
- Publication Date
- 2026-06-23
AI Technical Summary
The existing cyclone drying system uses medium-pressure steam as a heat source, resulting in high production costs. Furthermore, the heat from the conversion hot water in the vinyl chloride workshop is not effectively utilized, leading to a waste of heat resources.
A hot water conversion circulation device is adopted, using the hot water from the vinyl chloride workshop as a heat source. The air is heated by the first and second air heaters, and the wet PVC material is dried using an airflow drying tower and a cyclone drying bed, thereby reducing the consumption of medium-pressure steam.
By effectively utilizing the waste heat from the hot water conversion, the consumption of medium-pressure steam is reduced, production costs are lowered, and energy consumption is saved.
Smart Images
Figure CN224398257U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cyclone drying technology and is a cyclone drying system for converting hot water circulation. Background Technology
[0002] In PVC (polyvinyl chloride) production, the cyclone drying system in the polymerization workshop is a crucial step in removing moisture from the resin wet material. The wet PVC material exiting the reactor must be dried to ensure the quality of subsequent processing. This wet material is fed into the cyclone drying system, whose core equipment includes an air heater, an airflow drying tower, and a cyclone drying bed. The air heater's heat source typically comes from low-pressure steam, medium-pressure steam, and steam condensate from the steam network. The air heater's function is to heat the air temperature from 25°C to approximately 150°C. The air heater then delivers the heated air to the airflow drying tower and cyclone drying bed at the rear. The wet PVC material undergoes primary drying in the airflow drying tower, and then is sent to the cyclone drying bed for secondary drying.
[0003] However, the dry air heater uses medium-pressure steam to raise the air temperature for PVC drying, resulting in a large consumption of medium-pressure steam, approximately 8.70 t / h, leading to high production costs. Furthermore, the conversion hot water in the vinyl chloride workshop of the chlor-alkali plant cannot be consumed due to preheating, resulting in a waste of heat from the hot water in the conversion hot water tank. Summary of the Invention
[0004] This invention provides a hot water circulation device for a cyclone drying system, which overcomes the shortcomings of the prior art and can effectively solve the problem of high production costs caused by the use of medium-pressure steam as a heat source in the air heater of the existing cyclone drying system.
[0005] The technical solution of this utility model is achieved through the following measures: A cyclone drying system for converting hot water circulation includes a first air heater, a second air heater, an airflow drying tower, and a cyclone drying bed. The heating medium inlet of the first air heater is fixedly connected to a converting hot water inlet pipeline, the heating medium outlet of the first air heater is fixedly connected to a converting hot water outlet pipeline, a converting hot water inlet branch pipe is fixedly connected between the converting hot water inlet pipeline and the heating medium inlet of the second air heater, a converting hot water outlet branch pipe is fixedly connected between the heating medium outlet of the second air heater and the converting hot water outlet pipeline, a first air inlet pipeline is fixedly connected to the inlet of the first air heater, a first hot air outlet pipeline is fixedly connected between the outlet of the first air heater and the inlet of the airflow drying tower, a second air inlet pipeline is fixedly connected to the inlet of the second air heater, and a second hot air outlet pipeline is fixedly connected between the outlet of the second air heater and the inlet of the cyclone drying bed.
[0006] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:
[0007] A steam condensate inlet pipeline is fixedly connected to the hot water inlet pipeline on the right side of the aforementioned hot water inlet branch pipe, and a steam condensate outlet pipeline is fixedly connected to the hot water outlet pipeline on the right side of the hot water outlet branch pipe.
[0008] A safety pipeline is fixedly connected between the hot water inlet pipeline on the right side of the steam condensate inlet pipeline and the hot water outlet pipeline on the right side of the steam condensate outlet pipeline.
[0009] A flow regulating valve is fixedly installed on the hot water inlet pipeline between the steam condensate inlet pipeline and the hot water inlet branch pipeline.
[0010] Air filters and blowers are fixedly installed on both the first and second air intake lines.
[0011] The aforementioned hot water inlet and outlet pipelines are all equipped with insulation layers, which are made of glass wool, composite silicate, rock wool, or aluminum silicate wool.
[0012] This utility model has a reasonable and compact structure and is easy to use. It recovers and utilizes the heat of the conversion hot water in the vinyl chloride workshop as a heat source for the air heater in the cyclone drying system to increase the air temperature for drying PVC wet materials. It effectively utilizes the waste heat of the conversion hot water, avoids the waste of heat source, effectively reduces the consumption of medium-pressure steam, and lowers production costs. Attached Figure Description
[0013] Appendix Figure 1 This is a schematic diagram of the process flow of this utility model.
[0014] Appendix Figure 1 The codes in the diagram are as follows: 1 for the first air heater, 2 for the second air heater, 3 for the airflow drying tower, 4 for the cyclone drying bed, 5 for the hot water inlet pipeline, 6 for the hot water outlet pipeline, 7 for the hot water inlet branch pipe, 8 for the hot water outlet branch pipe, 9 for the first air inlet pipeline, 10 for the first hot air outlet pipeline, 11 for the second air inlet pipeline, 12 for the second hot air outlet pipeline, 13 for the steam condensate inlet pipeline, 14 for the steam condensate outlet pipeline, 15 for the safety pipeline, 16 for the flow regulating valve, 17 for the air filter, 18 for the blower, and 19 for the pressure gauge. Detailed Implementation
[0015] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.
[0016] Unless otherwise specified, all equipment and devices used in this invention are existing and commonly known in the art. For example, the first air heater 1, the second air heater 2, the air filter 17, and the blower 18 are existing and commonly known equipment.
[0017] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.
[0018] The present invention will be further described below with reference to the embodiments and accompanying drawings:
[0019] Example 1: As shown in the attached document Figure 1 As shown, the cyclone drying system's hot water circulation device includes a first air heater 1, a second air heater 2, an airflow drying tower 3, and a cyclone drying bed 4. The heating medium inlet of the first air heater 1 is fixedly connected to a hot water inlet pipeline 5, and the heating medium outlet of the first air heater 1 is fixedly connected to a hot water outlet pipeline 6. A hot water inlet branch pipe 7 is fixedly connected between the hot water inlet pipeline 5 and the heating medium inlet of the second air heater 2. A hot water outlet branch pipe 8 is fixedly connected between the heating medium outlet of the second air heater 2 and the hot water outlet pipeline 6. A first air inlet pipeline 9 is fixedly connected to the inlet of the first air heater 1. A first hot air outlet pipeline 10 is fixedly connected between the outlet of the first air heater 1 and the inlet of the airflow drying tower 3. A second air inlet pipeline 11 is fixedly connected to the inlet of the second air heater 2. A second hot air outlet pipeline 12 is fixedly connected between the outlet of the second air heater 2 and the inlet of the cyclone drying bed 4.
[0020] This invention involves sending the hot water from the vinyl chloride workshop, supplied by the hot water inlet pipeline 5, to the first air heater 1 as a heat source to heat the air. The heated air is then sent through the first hot air outlet pipeline 10 to the subsequent airflow drying tower 3 to perform a primary drying of the wet PVC material in the airflow drying tower 3. Similarly, the hot water from the vinyl chloride workshop, supplied by the hot water inlet pipeline 5 and the hot water inlet branch pipe 7, is sent to the second air heater 2 as a heat source to heat the air. The heated air is then sent through the second hot air outlet pipeline 12 to the subsequent intermediate cyclone drying bed 4 to perform a secondary drying of the wet PVC material that has undergone the primary drying.
[0021] This invention utilizes the heat from the conversion hot water in the vinyl chloride workshop, using it as a heat source for the air heater in the cyclone drying system to raise the air temperature for drying wet PVC materials. This effectively utilizes the waste heat of the conversion hot water, avoids heat source waste, effectively reduces the consumption of medium-pressure steam, and lowers production costs.
[0022] After this utility model is put into use, it can save 1.10t of medium-pressure steam per hour, and 26.40t of steam per day. Calculated at 65 yuan per ton of steam, it can save 1716 yuan per day compared to before. Calculated at 330 days of annual operation, it can save 566,200 yuan per year.
[0023] The hot water circulation device of the above-mentioned cyclone drying system can be further optimized and / or improved according to actual needs:
[0024] Example 2: Its difference from Example 1 is as follows: (See attached) Figure 1 As shown, a steam condensate inlet pipe 13 is fixedly connected to the steam condensate inlet pipe 5 on the right side of the steam hot water inlet branch pipe 7, and a steam condensate outlet pipe 14 is fixedly connected to the steam hot water outlet pipe 6 on the right side of the steam hot water outlet branch pipe 8.
[0025] In this invention, the heat source can be switched between hot water and steam condensate. When the hot water in the vinyl chloride workshop malfunctions or cannot provide a heat source, the steam condensate in the steam pipeline network can be used as a heat source. The operation of the cyclone drying system is not affected regardless of whether the steam condensate or hot water malfunctions. Specifically, the steam condensate is sent to the first air heater 1 through the steam condensate inlet pipeline 13 and the hot water inlet pipeline 5. After heat exchange, the steam condensate is sent out through the hot water outlet pipeline 6 and the steam condensate outlet pipeline 14.
[0026] Example 3: Its difference from Example 2 is as follows: (See attached) Figure 1 As shown, a safety pipeline 15 is fixedly connected between the conversion hot water inlet pipeline 5 on the right side of the steam condensate inlet pipeline 13 and the conversion hot water outlet pipeline 6 on the right side of the steam condensate outlet pipeline 14.
[0027] In this invention, when the first air heater 1 or the second air heater 2 malfunctions and requires maintenance, the converted hot water is sent out through the converted hot water inlet pipeline 5, the safety pipeline 15 and the converted hot water outlet pipeline 6 to ensure the safe operation of the device.
[0028] Example 4: It differs from Examples 2 to 3 in that: as shown in the appendix Figure 1 As shown, a flow regulating valve 16 is fixedly installed on the hot water inlet pipeline 5 between the steam condensate inlet pipeline 13 and the hot water inlet branch pipeline 7.
[0029] In this invention, the flow rate of the hot water can be controlled in real time by means of the flow regulating valve 16.
[0030] Example 5: It differs from Examples 1 to 4 in that, as shown in the appendix... Figure 1 As shown, an air filter 17 and a blower 18 are fixedly installed on both the first air intake line 9 and the second air intake line 11.
[0031] In this invention, an air filter 17 is used to remove impurities and contaminants, and a blower 18 is used to provide power for air delivery, ensuring stable air delivery.
[0032] Example 6: Its difference from Examples 1 to 5 is as follows: (See attached) Figure 1 As shown, both the hot water inlet pipe 5 and the hot water outlet pipe 6 are equipped with insulation layers, which are made of glass wool, composite silicate, rock wool, or aluminum silicate wool.
[0033] In this invention, the heat insulation layer effectively reduces heat loss and prevents burns to operators.
[0034] As needed, a pressure gauge 19 is fixedly installed on the hot water outlet pipe 6 between the hot water outlet branch pipe 8 and the steam condensate outlet pipe 14.
[0035] Depending on the needs, the pipelines and equipment of the cyclone drying system's hot water circulation device can also be equipped with conventional valves, thermometers, and pressure gauges that are known and commonly used in the field, according to production requirements.
[0036] The above technical features constitute the embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.
[0037] The usage process of this utility model embodiment:
[0038] First, air is delivered to the first air heater 1 via the air filter 17 and blower 18 on the first air intake pipeline 9. Hot water from the vinyl chloride workshop is delivered to the first air heater 1 via the hot water inlet pipeline 5, where the waste heat of the hot water is used to heat the air. The heated air is then delivered to the airflow drying tower 3 via the first hot air outlet pipeline 10, where the wet PVC material in the airflow drying tower 3 is dried once. The hot water, after heat exchange, is then returned to the vinyl chloride workshop via the hot water outlet pipeline 6.
[0039] Then, the air can be sent to the second air heater 2 via the air filter 17 and blower 18 on the second air intake line 11. The conversion water from the vinyl chloride workshop is sent to the second air heater 2 via the conversion hot water inlet line 5 and the conversion hot water inlet branch line 7, where the air is heated by the waste heat of the conversion hot water. The heated air is then sent to the cyclone dryer 4 via the second hot air outlet line 12 to perform secondary drying on the PVC wet material that has undergone primary drying. The conversion hot water after heat exchange is sent back to the vinyl chloride workshop via the conversion hot water outlet branch line 8 and the conversion hot water outlet line 6.
Claims
1. A cyclone drying system conversion hot water circulation device, characterized by The system includes a first air heater, a second air heater, an airflow drying tower, and a cyclone drying bed. The inlet of the heating medium of the first air heater is fixedly connected to a converted hot water inlet pipeline, and the outlet of the heating medium of the first air heater is fixedly connected to a converted hot water outlet pipeline. A converted hot water inlet branch pipe is fixedly connected between the converted hot water inlet pipeline and the inlet of the heating medium of the second air heater, and a converted hot water outlet branch pipe is fixedly connected between the outlet of the second air heater and the converted hot water outlet pipeline. The inlet of the first air heater is fixedly connected to a first air inlet pipeline, and the outlet of the first air heater is fixedly connected to the inlet of the airflow drying tower to a first hot air outlet pipeline. The inlet of the second air heater is fixedly connected to a second air inlet pipeline, and the outlet of the second air heater is fixedly connected to the inlet of the cyclone drying bed to a second hot air outlet pipeline.
2. The cyclone drying system conversion hot water circulation device according to claim 1, characterized in that A steam condensate inlet pipeline is fixedly connected to the hot water inlet pipeline on the right side of the hot water inlet branch pipe, and a steam condensate outlet pipeline is fixedly connected to the hot water outlet pipeline on the right side of the hot water outlet branch pipe.
3. The cyclone drying system conversion hot water circulation device according to claim 2, characterized in that A safety pipeline is fixedly connected between the hot water inlet pipeline on the right side of the steam condensate inlet pipeline and the hot water outlet pipeline on the right side of the steam condensate outlet pipeline.
4. The cyclonic drying system conversion hot water circulation apparatus of claim 2 or 3, wherein A flow regulating valve is fixedly installed on the hot water inlet pipe between the steam condensate inlet pipe and the hot water inlet branch pipe.
5. The cyclone drying system conversion hot water circulating device according to claim 1 or 2 or 3, characterized in that Air filters and blowers are fixedly installed on both the first and second air intake lines.
6. The cyclone drying system conversion hot water circulation device of claim 4, wherein Air filters and blowers are fixedly installed on both the first and second air intake lines.
7. The cyclone drying system conversion hot water circulating device according to claim 1 or 2 or 3 or 6, characterized in that Both the hot water inlet and outlet pipelines are equipped with insulation layers, which are made of glass wool, composite silicate, rock wool, or aluminum silicate wool.
8. The cyclone drying system conversion hot water circulation device of claim 4, wherein Both the hot water inlet and outlet pipelines are equipped with insulation layers, which are made of glass wool, composite silicate, rock wool, or aluminum silicate wool.
9. The cyclone drying system conversion hot water circulation device of claim 5, wherein Both the hot water inlet and outlet pipelines are equipped with insulation layers, which are made of glass wool, composite silicate, rock wool, or aluminum silicate wool.