Condensed water and hot water sharing system of polypropylene SPG device

Abstract

The utility model discloses a condensed water and hot water sharing system of a polypropylene SPG device, and belongs to the technical field of polypropylene production. According to the technical scheme, the condensed water and hot water sharing system of the polypropylene SPG device comprises a condensed water tank, a hot water tank and a controller; the condensed water tank is connected with a first sewage discharge pipeline, a first condensed water outlet pipeline and a condensed water collecting and inlet pipeline, the hot water tank is communicated with the condensed water collecting and inlet pipeline, and the first sewage discharge pipeline discharges substances at the bottom of the condensed water tank when the condensed water tank starts to be used. Or when the liquid level in the condensation tank is too high, water in the condensation tank is rapidly discharged; condensate water generated by each steam pipeline enters the condensate water tank during the starting and stopping period of the polypropylene device, water entering the hot water tank is isolated, the situation that hot water and condensate water are mixed is avoided, and the stability of the quality of the conveyed condensate water is guaranteed. Meanwhile, when the liquid level of the condensate water tank is lower than the lower limit, the condensate water delivery regulating valve is closed in an interlocking mode, and the situation that the liquid level is too low, and the pump is evacuated to damage the pump is prevented; during normal operation, the condensate water tank is cut off, and the hot water tank is cut in for normal use.

Description

Technical Field

[0001] The utility model belongs to the technical field of polypropylene production, and in particular relates to a condensate and hot water sharing system of a polypropylene SPG device. Background Art

[0002] Polypropylene is a semi-crystalline thermoplastic with high impact resistance, strong mechanical properties, and resistance to corrosion by a variety of organic solvents and acids and alkalis. It is widely used in the industry and is one of the common polymer materials. The polypropylene SPG device is equipped with a hot water tank to recover the steam condensate of the device. During the start-up and shutdown of the device, the steam condensate of the hot water tank is sent to the jacket of the polymerization reactor to maintain the normal operation of the polymerization reactor and make full use of the waste heat of the steam condensate. However, when the polymerization reactor is operating normally, the jacket uses circulating water for heat extraction. During the switching of the steam condensate of the hot water tank and the circulating water, there is a situation where the circulating water is connected to the hot water tank, which affects the quality of the steam condensate sent out. Utility Model Content

[0003] The utility model provides a condensate water and hot water sharing system of a polypropylene SPG device, which avoids the situation that the condensate water and the hot water are mixed with each other and ensures the stability of the quality of the externally delivered condensate water.

[0004] The technical solution of the utility model is:

[0005] Condensate and hot water sharing system of polypropylene SPG device, including condensate tank, hot water tank and controller;

[0006] The condensate tank is connected with a sewage discharge pipeline 1, a condensate outlet pipeline 1 and a condensate collection inlet pipeline, and the hot water tank is connected with the condensate collection inlet pipeline. The sewage discharge pipeline 1 is used to discharge the substances at the bottom of the condensate tank when the condensate tank is first put into use, or to quickly discharge the water in the condensate tank when the liquid level in the condensate tank is too high;

[0007] The hot water tank is provided with a sewage discharge pipeline 2 and hot and cold water outlet pipelines. The condensate outlet pipeline 1 is connected with the hot and cold water outlet pipelines. The sewage discharge pipeline 2 is also provided to discharge the substances at the bottom of the hot water tank when the hot water tank is first put into use, or to quickly discharge the water in the hot water tank when the liquid level in the hot water tank is too high; the hot and cold water outlet pipelines are respectively connected with the condensate delivery to the pipeline network, the condensate delivery to the heating water pump inlet pipeline, and the heating steam outlet pipeline, and the heating steam outlet pipeline is connected to the heating user's household entrance pipeline; a condensate pump is provided on the hot and cold water outlet pipelines; the hot and cold water outlet pipelines are provided with a condensate delivery regulating valve, and the condensate tank is provided with a liquid level sensor, and the condensate delivery regulating valve and the liquid level sensor are both electrically connected to the controller.

[0008] Preferably, a filter is provided on the pipeline before the inlet of the condensate pump.

[0009] Preferably, the volume of the condensate tank is 6-8m 3 The inner diameter of the condensate tank is 80-100cm.

[0010] Preferably, the condensate delivery regulating valve includes an automatic control valve interlocked with the liquid level sensor and a manual valve arranged in parallel with the automatic control valve.

[0011] Preferably, the condensate tank is provided with a temperature sensor and a pressure sensor, and both the temperature sensor and the pressure sensor are electrically connected to the controller.

[0012] Preferably, the hot water tank is also provided with a total flow control loop, a flow control valve is provided on the total flow control loop, and the flow control valve is electrically connected to the controller.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. During the start-up and shutdown period of the polypropylene device of the utility model, the condensed water generated by each steam pipeline enters the condensed water tank, isolates the water entering the hot water tank, cuts off the hot water and condensed water from mixing, and ensures the stability of the quality of the condensed water sent out. At the same time, when the liquid level of the condensed water tank is lower than the lower limit, the interlock closes the condensed water sending regulating valve to prevent the liquid level from being too low and the pump from being emptied and causing damage to the pump; during normal operation, the condensed water tank is cut off and the hot water tank is cut in for normal use.

[0015] 2. A filter is installed on the pipeline before the inlet of the condensate pump. The filter is a Y-type filter to ensure the water quality of the condensate pump and extend the service life of the condensate pump.

[0016] 3. The condensate delivery regulating valve is set with an automatic control valve interlocked with the liquid level sensor and a manual valve is set in parallel with the automatic control valve. The two are used complementary to avoid unnecessary losses caused by repeated shutdowns. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] In the figure, 1. condensate tank; 2. hot water tank; 3. sewage discharge pipeline 1; 4. condensate outlet pipeline 1; 5. condensate collection inlet pipeline; 6. sewage discharge pipeline 2; 7. hot and cold water outlet pipeline; 8. condensate delivery to pipeline network; 9. condensate delivery to heating water pump inlet pipeline; 10. heating steam outlet pipeline; 11. condensate pump; 12. condensate delivery regulating valve; 13. filter; 14. total flow control circuit; 15. hot water outlet pipeline. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] Example 1

[0021] like Figure 1 As shown, this embodiment provides a condensate and hot water sharing system for a polypropylene SPG device, including a condensate tank 1, a hot water tank 2 and a controller. The volume of the condensate tank is 6m 3 The inner diameter of the condensate tank is 80 cm. The condensate tank 1 is provided with a temperature sensor and a pressure sensor. The temperature sensor and the pressure sensor are electrically connected to the controller. The temperature sensor and the pressure sensor monitor the temperature and pressure in the condensate tank. The hot water tank 2 is connected to the condensate collection water inlet pipeline 5.

[0022] The condensate tank 1 is connected with a sewage discharge pipeline 3, a condensate outlet pipeline 4 and a condensate collection inlet pipeline 5;

[0023] The hot water tank is provided with a sewage discharge pipeline 2 6 and a hot and cold water outlet pipeline 7. The condensate outlet pipeline 1 4 is connected to the hot and cold water outlet pipeline 7. The hot and cold water outlet pipeline 7 is respectively connected with a condensate delivery to a pipeline network pipeline 8, a condensate delivery to a heating water pump inlet pipeline 9, and a heating steam outlet pipeline 10. The heating steam outlet pipeline 10 is connected to multiple heating user entrance pipelines; a condensate pump 11 is provided on the hot and cold water outlet pipeline 7, and a filter 13 is provided on the pipeline before the condensate pump inlet. The filter is Y-type filter; the hot and cold water outlet pipelines 7 are provided with a condensate delivery regulating valve 12, which includes an automatic control valve interlocked with a liquid level sensor and a manual valve arranged in parallel with the automatic control valve. The condensate tank 1 is provided with a liquid level sensor, and the condensate delivery regulating valve 12 and the liquid level sensor are both electrically connected to the controller. The hot water tank 2 is also provided with a total flow control loop 14, and a flow control valve is provided on the total flow control loop 14, and the flow control valve is electrically connected to the controller.

[0024] The specific process is:

[0025] During the start-up and shutdown period: the condensed water generated by each steam pipeline of the polypropylene device enters the condensed water tank 1 through the condensed water collection inlet pipeline 5, flows out through the condensed water outlet pipeline 4, and finally is sent out of the system through the condensed water external delivery to the pipe network pipeline 8 and the condensed water external delivery to the heating water pump inlet pipeline 9;

[0026] When the device is operating normally: the condensed water generated by each steam pipeline of the polypropylene device enters the hot water tank 2 through the condensate collection inlet pipeline 5, and the total amount of hot water flowing in and out is monitored by the total flow control loop 14. The hot water in the hot water tank 2 enters the hot and cold water outlet pipeline 7 through the hot water outlet pipeline 15, and then enters the heating steam outlet pipeline 10, and finally enters multiple heating user entrance pipelines.

[0027] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. Polypropylene SPG device condensate and hot water sharing system, characterized in that: It comprises a condensate tank (1), a hot water tank (2) and a controller; The condensate tank (1) is connected to a sewage discharge pipeline (3), a condensate outlet pipeline (4) and a condensate collection inlet pipeline (5), and the hot water tank (2) is connected to the condensate collection inlet pipeline (5); The hot water tank (2) is provided with a second sewage discharge pipeline (6) and a hot and cold water outlet pipeline (7); the first condensate outlet pipeline (4) is connected to the hot and cold water outlet pipeline (7); the hot and cold water outlet pipeline (7) is respectively connected to a condensate delivery to a pipeline network pipeline (8), a condensate delivery to a heating water pump inlet pipeline (9), and a heating steam outlet pipeline (10); the heating steam outlet pipeline (10) is connected to a heating user inlet pipeline; a condensate pump (11) is provided on the hot and cold water outlet pipeline (7); a condensate delivery regulating valve (12) is provided on the hot and cold water outlet pipeline (7); the condensate tank (1) is provided with a liquid level sensor; the condensate delivery regulating valve (12) and the liquid level sensor are both electrically connected to a controller.

2. The condensate and hot water sharing system of the polypropylene SPG device according to claim 1, characterized in that: A filter (13) is provided on the pipeline before the inlet of the condensate pump (11).

3. The condensate and hot water sharing system of the polypropylene SPG device according to claim 1, characterized in that: The volume of the condensate tank is 6-8m 3 The inner diameter of the condensate tank is 80-100cm.

4. The condensate and hot water sharing system of the polypropylene SPG device according to claim 1, characterized in that: The condensate delivery regulating valve (12) comprises an automatic control valve interlocked with a liquid level sensor and a manual valve arranged in parallel with the automatic control valve.

5. The condensate and hot water sharing system of the polypropylene SPG device according to claim 1, characterized in that: The condensate tank (1) is provided with a temperature sensor and a pressure sensor, and both the temperature sensor and the pressure sensor are electrically connected to the controller.

6. The condensate and hot water sharing system of the polypropylene SPG device according to claim 1, characterized in that: The hot water tank (2) is also provided with a total flow control circuit (14), and a flow control valve is provided on the total flow control circuit (14), and the flow control valve is electrically connected to the controller.

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