Automatic conveying device for extracting steam condensation water in workshop

Abstract

The utility model discloses an automatic conveying device for extracting steam condensed water in a workshop, relates to the technical field of traditional Chinese medicine production devices, solves the problems of maintenance and cavitation of a pump in the condensed water conveying process, and comprises a steam condensed water buried tank which is buried underground and connected with a steam condensed water source in the workshop through a pipeline, and further comprises a drainage tank, the drainage tank is located above the ground and connected with the steam condensate buried tank through a pipeline, and a liquid level meter is arranged on the outer side of the drainage tank; the liquid outlet pump is located above the ground, and a liquid inlet of the liquid outlet pump is connected with a liquid outlet of the drainage tank through a pipeline; a liquid outlet of the liquid outlet pump is connected with the plate heat exchanger through a pipeline; and a PLC control module. The drainage tank is additionally arranged on the basis of automatic control, and a vaporized part in the drainage tank is pumped away through the vacuumizing pipeline so as to ensure that the pressure in the drainage tank is lower than that of the buried tank, so that the liquid outlet pump can continuously discharge liquid, and continuous heat exchange operation of steam condensation water is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of traditional Chinese medicine production devices, in particular to an automatic conveying device for steam condensate in an extraction workshop. Background Technique

[0002] At present, the industry pays more attention to the secondary utilization of the heat source of steam condensate in the workshop, which is often used for preheating the extraction solvent. During the use process, the common method is to collect the steam condensate in an underground storage tank and conduct heat exchange through a plate heat exchanger to realize the secondary utilization of the condensate heat source.

[0003] The currently common conveying methods are as follows: First, a submerged pump is installed in the underground tank. This solution has a great impact on the service life of the pump, and the pump is damaged frequently at high temperatures. At the same time, since the equipment is an underground tank, the later maintenance of the pump is difficult; Second, the pump is installed above the ground. This method solves the problem of pump maintenance, but cannot solve the cavitation problem of the pump, resulting in an inability to guarantee the pump delivery flow rate, or even the pump cannot discharge liquid. Content of the Utility Model

[0004] The purpose of the utility model is to solve the above problems, and a steam condensate automatic conveying device for an extraction workshop is designed to solve the problems of pump maintenance and cavitation during the condensate conveying process.

[0005] To achieve the above object, the technical solution of the utility model is that an automatic conveying device for steam condensate in an extraction workshop includes a steam condensate underground tank buried below the ground and connected to the steam condensate source in the workshop through a pipeline, and further includes:

[0006] A drainage tank, which is located above the ground and is connected to the steam condensate underground tank through a pipeline. The inside of the drainage tank is in a negative pressure environment, and a liquid level gauge for detecting the liquid level change in the drainage tank is arranged on the outside of the drainage tank;

[0007] A liquid discharge pump, which is located above the ground, and the liquid inlet of the liquid discharge pump is connected to the liquid outlet of the drainage tank through a pipeline;

[0008] A plate heat exchanger, the liquid outlet of the liquid discharge pump is connected to the plate heat exchanger through a pipeline, and a drinking water heat exchange pipeline, a drinking water external discharge pipeline and a condensate external discharge pipeline are connected to the plate heat exchanger;

[0009] A PLC control module, which is electrically connected to the liquid level gauge and the liquid discharge pump respectively.

[0010] Preferably, a vacuum extraction pipeline is connected to the top of the drainage tank, the vacuum extraction pipeline is connected to an external vacuum extraction mechanism, and a vacuum valve is connected to the vacuum extraction pipeline.

[0011] Preferably, a temperature transmitter for detecting the temperature of the liquid in the pipe is connected to the drinking water discharge pipe.

[0012] Preferably, a water inlet valve is connected to the drinking water heat exchange pipe.

[0013] Preferably, the water inlet valve, the vacuum valve and the temperature transmitter are all electrically connected to the PLC control module.

[0014] Preferably, the water inlet valve and the vacuum valve are both solenoid valves.

[0015] Preferably, a water replenishing pipe is further connected to the top of the drainage tank, and the water replenishing pipe is externally connected to a water source.

[0016] Preferably, an inlet pipe and an outlet pipe are respectively connected to the upper and lower sides outside the drainage tank, the liquid level gauge is vertically fixed between the inlet pipe and the outlet pipe, and both the upper and lower ends of the liquid level gauge are connected to the inlet pipe and the outlet pipe respectively through flanges.

[0017] Compared with the prior art, its beneficial effects are as follows:

[0018] The condensate automatic conveying device in the present utility model solves the problems of pump maintenance and cavitation during the condensate conveying process. On the basis of automatic control, a drainage tank is added, and combined with the real-time detection of the liquid level in the drainage tank, the feedback control system automatically evacuates the drainage tank. The vaporized part in the drainage tank is evacuated through the vacuum pipeline to ensure that the pressure in the drainage tank is lower than the pressure of the underground tank, so as to ensure that the liquid outlet pump can continuously discharge liquid, thereby realizing continuous heat exchange operation of steam condensate and improving the energy utilization rate of the workshop. And the liquid outlet pump is located above the ground, which is more convenient for later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the steam condensate automatic conveying device in the present utility model;

[0020] Figure 2 is the structural schematic diagram of the drainage tank in the steam condensate automatic conveying device.

[0021] In the figure, 1. underground steam condensate tank; 2. drainage tank; 3. liquid outlet pump; 4. plate heat exchanger; 5. PLC control module; 6. liquid level gauge; 7. vacuum pipeline; 8. water replenishing pipeline; 9. vacuum valve; 10. drinking water heat exchange pipeline; 11. drinking water discharge pipeline; 12. condensate discharge pipeline; 13. temperature transmitter; 14. water inlet valve; 15. outlet pipeline; 16. inlet pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figure 1 shown, a preferred embodiment of the present utility model provides an automatic conveying device for extracting steam condensate in a workshop. The device mainly includes components such as a steam condensate underground storage tank 1, a drainage tank 2, a liquid outlet pump 3, a plate heat exchanger 4, a PLC control module 5, etc. Among them, the steam condensate underground storage tank 1 is pre-buried underground, and two pipes are connected to the steam condensate underground storage tank 1. Both pipes extend out of the ground. One pipe is used to connect to the steam condensate source in the workshop, and the other pipe is used to connect to the drainage tank 2.

[0024] The steam condensate source comes from various traditional Chinese medicine production devices in the workshop. The steam generated during the heating of traditional Chinese medicine by the traditional Chinese medicine production devices will condense into high-temperature liquid water, and this conveying device is used for secondary utilization of the heat of this high-temperature liquid water.

[0025] Components such as the drainage tank 2, the liquid outlet pump 3, and the plate heat exchanger 4 are all located above the ground for easy later maintenance. The pipe connecting the steam condensate underground storage tank 1 and the drainage tank 2 extends to near the inner bottom surface of the drainage tank 2.

[0026] Refer to Figure 2 , a vacuum extraction pipe 7 and a water replenishment pipe 8 are respectively connected to the top of the drainage tank 2. The water replenishment pipe 8 is connected to an external water source, and a valve is also installed on the water replenishment pipe 8. When the drainage tank 2 is used for the first time, the valve is manually opened to fill the drainage tank 2 with water until the drainage tank 2 is full, and the gas in the drainage tank 2 is discharged.

[0027] The vacuum extraction pipe 7 is connected to an external vacuum extraction mechanism such as a vacuum machine. When the liquid level in the drainage tank 2 drops, vacuum is extracted through the vacuum extraction pipe 7 to evacuate the gas in the space above the liquid level in the drainage tank 2, so that the inside of the drainage tank 2 is always in a negative pressure state. When the inside of the drainage tank 2 is in a negative pressure environment, since the pressure inside the drainage tank 2 is less than the pressure inside the steam condensate underground storage tank 1, the steam condensate in the steam condensate underground storage tank 1 will flow into the drainage tank 2 under the action of the negative pressure.

[0028] A vacuum valve 9 is connected to the vacuum extraction pipe 7 to control the opening and closing of the vacuum extraction pipe 7. When vacuum extraction is required, the vacuum valve 9 is opened to start vacuum extraction of the drainage tank 2.

[0029] As Figure 2As shown in the figure, an inlet pipe 16, an outlet pipe 15 and a liquid level gauge 6 are arranged outside the drainage tank 2. The inlet pipe 16 is close to the upper side of the drainage tank 2, the outlet pipe 15 is close to the lower side of the drainage tank 2, the liquid level gauge 6 is vertically arranged, and the upper and lower ends of the liquid level gauge 6 are respectively connected to the inlet pipe 16 and the outlet pipe 15 through flanges. The steam condensate in the drainage tank 2 will flow out through the outlet pipe 15, and the liquid level change will be shown in the liquid level gauge 6.

[0030] The liquid outlet of the drainage tank 2 is connected to the liquid outlet pump 3 through a pipe. The outlet of the liquid outlet pump 3 is connected to the plate heat exchanger 4 through a pipe. A drinking water heat exchange pipe 10, a drinking water discharge pipe and a condensate discharge pipe 12 are connected to the plate heat exchanger 4. The liquid outlet pump 3 will extract the steam condensate in the drainage tank 2 and transport it to the plate heat exchanger 4. Drinking water is transported into the plate heat exchanger 4 through the drinking water heat exchange pipe 10. After the drinking water exchanges heat with the steam condensate in the plate heat exchanger 4, the heat-exchanged drinking water is discharged from the drinking water discharge pipe, and the heat-exchanged steam condensate is discharged from the condensate discharge pipe 12.

[0031] A temperature transmitter 13 is connected to the drinking water discharge pipe 11 for detecting the temperature of the heat-exchanged drinking water. At the same time, a water inlet valve 14 is connected to the drinking water heat exchange pipe 10 for controlling the drinking water to enter the plate heat exchanger 4.

[0032] In this embodiment, the liquid level gauge 6 used is an electronic liquid level gauge 6. At the same time, the vacuum valve 9 and the water inlet valve 14 are both electronic valves. The temperature transmitter 13 is also electronically controlled. The above-mentioned PLC control module 5 is electrically connected to the liquid level gauge 6, the liquid outlet pump 3, the water inlet valve 14, the vacuum valve 9 and the temperature transmitter 13 respectively to control the operation of these components.

[0033] The temperature of the steam condensate in the workshop is 90 - 95 °C, and the steam condensate will enter the underground steam condensate buried tank 1 through a pipe.

[0034] During the first operation, manually replenish water into the drainage tank 2 through the water replenishment pipe 8 until the highest liquid level. This is a one-time water replenishment, and subsequent operations do not require water replenishment. This water replenishment operation is to discharge the excess gas in the drainage tank 2.

[0035] The PLC control module 5 controls the condensate liquid outlet pump 3 to start, extracts the condensate in the drainage tank 2 into the plate heat exchanger 4, then automatically opens the drinking water inlet valve for automatic drinking water heat exchange, and the temperature transmitter 13 detects the temperature of the heat-exchanged drinking water in real time after heat exchange.

[0036] After the first water replenishment in the drainage tank 2, the liquid outlet pump 3 pumps the water in the tank to the plate heat exchanger 4. As the water level drops, since the inside of the drainage tank 2 is in negative pressure, the steam condensate in the steam condensate underground tank 1 will be automatically pumped into the drainage tank 2 under the action of pressure, so that the condensate in the drainage tank 2 is always at a high liquid level.

[0037] The liquid level gauge 6 detects the liquid level height in the drainage tank 2 in real time. When the liquid level detected by the liquid level gauge 6 is lower than the set value (indicating that the condensate in the drainage tank 2 vaporizes severely and there is more gas in the tank at this time), the PLC control module 5 automatically opens the vacuum valve 9, and the gas in the tank is evacuated from the drainage tank 2 through the vacuum pipeline 7, so that the inside of the drainage tank 2 always maintains negative pressure; when the liquid level detected by the liquid level gauge 6 reaches the set high liquid level, the PLC control module 5 controls the vacuum valve 9 to close. The above process runs continuously during the whole liquid outlet stage for detection and control until the condensate heat exchange is completed.

[0038] The liquid outlet pump 3 pumps the condensate to the plate heat exchanger 4 for heat exchange with drinking water. When the production ends or the heat exchange of the steam condensate underground tank 1 is completed, each system resets.

[0039] The above technical solution only reflects the preferred technical solution of the technical solution of the present utility model. Some changes that may be made to some parts by those skilled in the art of the present technology all reflect the principle of the present utility model and fall within the protection scope of the present utility model.

Claims

1. An automatic conveying device for extracting workshop steam condensate, comprising a steam condensate underground tank (1) buried below the ground and connected to the workshop steam condensate source through a pipeline, characterized in that, It further includes: A drainage tank (2), which is located above the ground and is connected to the steam condensate underground tank (1) through a pipeline. The inside of the drainage tank (2) is in a negative pressure environment, and a liquid level gauge (6) for detecting the liquid level change in the drainage tank (2) is provided on the outside of the drainage tank (2); A liquid outlet pump (3), which is located above the ground. The liquid inlet of the liquid outlet pump (3) is connected to the liquid outlet of the drainage tank (2) through a pipeline; A plate heat exchanger (4), the liquid outlet of the liquid outlet pump (3) is connected to the plate heat exchanger (4) through a pipeline. A drinking water heat exchange pipeline (10), a drinking water external discharge pipeline (11) and a condensate external discharge pipeline (12) are connected to the plate heat exchanger (4); A PLC control module (5), the PLC control module (5) is electrically connected to the liquid level gauge (6) and the liquid outlet pump (3) respectively.

2. The automatic conveying device for steam condensate in an extraction workshop according to claim 1, characterized in that, The top of the drainage tank (2) is connected with a vacuum extraction pipeline (7), the vacuum extraction pipeline (7) is connected to an external vacuum extraction mechanism, and a vacuum valve (9) is connected to the vacuum extraction pipeline (7).

3. The automatic conveying device for extracting steam condensate water in a workshop according to claim 2, wherein A temperature transmitter (13) for detecting the liquid temperature in the pipe is connected to the drinking water external discharge pipeline (11).

4. An automatic conveying device for extracting steam condensate water in a workshop according to claim 3, characterized in that, An inlet valve (14) is connected to the drinking water heat exchange pipeline (10).

5. The automatic conveying device for extracting workshop steam condensate according to claim 4, characterized in that, The inlet valve (14), the vacuum valve (9) and the temperature transmitter (13) are all electrically connected to the PLC control module (5).

6. The automatic conveying device for extracting steam condensate water in a workshop according to claim 5, characterized in that, The inlet valve (14) and the vacuum valve (9) both adopt solenoid valves.

7. An automatic conveying device for extracting steam condensate in a workshop according to claim 1, characterized in that, The top of the drainage tank (2) is further connected with a water replenishing pipeline (8), and the water replenishing pipeline (8) is externally connected to a water source.

8. An automatic conveying device for extracting steam condensate water in a workshop according to claim 1, characterized in that, The upper and lower sides of the outside of the drainage tank (2) are respectively connected with an inlet pipeline (16) and an outlet pipeline (15). The liquid level gauge (6) is vertically fixed between the inlet pipeline (16) and the outlet pipeline (15), and both the upper and lower ends of the liquid level gauge (6) are connected to the inlet pipeline (16) and the outlet pipeline (15) respectively through flanges.

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