CN107421377A - A kind of heat exchanger condensed water open type steam trap connection and its application method - Google Patents

Abstract

The invention discloses a kind of heat exchanger condensed water open type steam trap connection and its application method, wherein heat exchanger condensed water open type steam trap connection includes hydrophobic pipeline and recovery pipe, it is the condensation water tank that open type is set that it, which also includes top, hydrophobic pipeline end is provided with the diversion pipeline for being connected with the hydrophobic pipeline and condensation water tank, the end of diversion pipeline is stretched in condensation water tank, and the end of diversion pipeline is provided with steam jet ejector, soft water import and liquid outlet are additionally provided with condensation water tank, the soft water import is located at the top of condensation water tank, and soft water import is connected with the soft water pipeline for conveying soft water into condensation water tank, the liquid outlet is located at condensation water tank bottom, and it is provided with liquid outlet and connects the liquid outlet and the return line of the recovery pipe, pump is equipped on return line.The present invention realizes to be reclaimed to greatest extent to condensate, is solve thed problems, such as that condensate discharge system back pressure is too high, is reduced the generation of water hammer.

Description

A heat exchanger condensate water open type drain device and its use method

technical field

The invention belongs to the technical field of tobacco drying equipment, and in particular relates to an open-type drainage device for condensed water of a heat exchanger and a use method thereof.

Background technique

At present, in the production process of tobacco thread drying equipment, because the production of silk thread is discontinuous, it will be shut down and started every day. After the shutdown, the steam valve will be closed, and the steam accumulated in the heater will condense into condensed water. The pressure becomes a vacuum, and the condensed water cannot be discharged, and the bypass valve must be opened to discharge the condensed water when the machine is turned on again. In addition, when the opening of the pneumatic membrane valve becomes smaller, the inlet pressure of the trap decreases, and when the pressure difference is not enough to overcome the back pressure of the condensed water pipeline, the drain cannot discharge the condensed water, resulting in the accumulation of condensed water in the heat exchanger, and the process temperature is difficult to guarantee .

And because the condensing system is over-pressurized, on the one hand, water hammer occurs due to poor drainage, causing serious noise and increased mechanical stress, which seriously damages the heat exchanger. On the other hand, it affects the stability of tobacco moisture control. Sex has a greater impact.

Contents of the invention

In order to solve the deficiencies in the prior art, the present invention provides a heat exchanger condensed water open-type drainage device and its use method, which avoids the accumulation of condensed water in the pipeline, eliminates the water hammer phenomenon, and improves the temperature control accuracy. While ensuring and improving the temperature and humidity quality of the process, it realizes the maximum recovery of condensed water, effectively solves the problem of excessive back pressure in the condensed water discharge system, reduces the occurrence of water hammer, and stabilizes the stability of tobacco moisture control performance, improving the reliability of the equipment.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: an open-type drainage device for condensed water in a heat exchanger, including a drainage pipeline for conveying condensed water and a recovery pipeline for recovering condensed water, and it also includes an upper It is an open condensate tank, and the end of the drainage pipeline is provided with a diversion pipeline connected to the drainage pipeline and the condensate tank, and the end of the diversion pipeline extends into the condensate tank, and the end of the diversion pipeline A steam ejector is provided, and the condensate tank is also provided with a soft water inlet and a liquid outlet. The soft water inlet is located on the upper part of the condensate tank, and the soft water inlet is connected with a soft water pipeline for delivering soft water to the condensate tank. The outlet is located at the lower part of the condensed water tank, and the liquid outlet is provided with a return pipeline connecting the liquid outlet and the recovery pipeline, and a pump is arranged on the return pipeline.

The condensed water tank is provided with a liquid level gauge for detecting the liquid level in the tank and a temperature sensor for detecting the temperature of the liquid in the tank, and the liquid level gauge is connected with the pump control.

A solenoid valve is arranged on the soft water pipeline, and the solenoid valve is connected to the temperature sensor for control.

A cut-off valve, a drain valve and a check valve are sequentially arranged on the drain pipeline along the liquid flow direction.

A hydrophobic protective pipeline is connected to the side of the hydrophobic pipeline, and the two ends of the hydrophobic protective pipeline are respectively connected with the hydrophobic pipeline upstream of the shut-off valve and the hydrophobic pipeline downstream of the check valve.

The end of the drain pipeline is also provided with a direct-flow pipeline connected with the drain pipeline and the recovery pipeline, and a shut-off valve is arranged on the direct-flow pipeline.

Stop valves are also arranged on the diversion pipeline and the return pipeline.

The bottom of the condensed water tank is provided with a drain port, and the drain port is connected with a drain pipeline, and a shut-off valve is arranged on the drain pipeline; an overflow pipe is also connected with the condensed water tank.

A pump protection pipeline is connected next to the pump, and both ends of the pump protection pipeline are respectively connected with the upstream and downstream return pipelines of the pump.

The invention also discloses a method for using an open-type drain device for condensed water in a heat exchanger, which includes the following steps:

1) Open the soft water pipeline before starting the equipment to store a certain amount of water in the condensate tank. The liquid level must be at least below the steam injector, and then close the soft water pipeline. The liquid level in the condensate tank is detected and controlled by the liquid level gauge;

2) Open the drainage pipeline, and after the equipment is turned on for heat exchange and drainage, the condensed water enters the condensed water tank through the steam ejector through the drained pipeline to mix with the soft water in the condensed water tank, and the temperature sensor controls the temperature of the liquid in the condensed water tank. When the condensed water tank When the liquid temperature exceeds 60±5°C, the soft water pipeline is opened again to keep the liquid temperature in the condensate tank constant;

3) When the liquid level in the condensed water tank reaches the set height, the pump starts to force the liquid in the condensed water tank to be discharged into the recovery pipeline.

The beneficial effects of device of the present invention are:

The application of the open-type drainage device for condensed water in the heat exchanger of the present invention avoids the accumulation of condensed water in the pipeline, eliminates the phenomenon of water hammer, improves the accuracy of temperature control, and realizes the control of condensed water while ensuring and improving the quality of process temperature and humidity. The maximum recovery effectively solves the problem of excessive back pressure in the condensate discharge system, reduces the occurrence of water hammer, stabilizes the stability of tobacco moisture control, and improves the reliability of the equipment.

In the present invention, due to the existence of an open condensed water tank, the condensed water with steam is uniformly mixed with soft water in the condensed water tank to realize cooling of the condensed water, and the water vapor in the condensed water will be directly drained from the top opening of the condensed water tank to Reduce the occurrence of water hammer in subsequent pipeline transportation.

The end of the drain pipeline is also provided with a direct-flow pipeline connected with the drain pipeline and the recovery pipeline, and a stop valve is arranged on the direct-flow pipeline. The traditional operation method is directly connected to the recovery pipeline to ensure the operation efficiency of the equipment.

The arrangement of the liquid level gauge and the temperature sensor in the present invention facilitates automatic detection and control.

The beneficial effect of using method of the present invention is:

The method for using the open-type drain device for condensed water in the heat exchanger of the present invention is simple to operate and easy to control, realizes maximum recovery of condensed water, effectively solves the problem of excessive back pressure in the condensed water discharge system, and reduces the phenomenon of water hammer Occurrence stabilizes the stability of tobacco moisture control.

Description of drawings

Fig. 1 is a schematic diagram of the system structure of the present invention.

detailed description

As shown in Figure 1, a heat exchanger condensed water open-type drainage device of the present invention includes a drainage pipeline 2 for conveying condensed water and a recovery pipeline 1 for recovering condensed water. The condensed water tank 4 that is set in the same way, the end of the drain pipeline 2 is provided with a diversion pipeline 10 connected with the drain pipeline 2 and the condensed water tank 4, and the end of the diversion pipeline 10 extends into the condensed water tank 4, and the guide The end of the flow pipeline 10 is provided with a steam injector 9, and the condensed water tank 4 is also provided with a soft water inlet and a liquid outlet. Soft water pipeline 1 of soft water, described liquid outlet is positioned at condensed water tank 4 bottoms, and liquid outlet place is provided with the return pipeline 12 that connects this liquid outlet and described recovery pipeline 8, is equipped with on the return pipeline 12 There are gear pumps7.

The condensed water tank 4 is provided with a magnetic liquid level gauge 6 for detecting the liquid level in the tank and a temperature sensor 3 for detecting the temperature of the liquid in the tank, and the magnetic liquid level gauge 6 is connected to the gear pump 7 for control. The soft water pipeline 1 is equipped with a solenoid valve 13 , and the solenoid valve 13 is connected to the temperature sensor 3 for control.

The drain pipeline 2 is provided with a shut-off valve, a drain valve 14 and a check valve 15 in sequence along the liquid flow direction. In addition, a hydrophobic protective pipeline 16 is connected to the side of the hydrophobic pipeline 2, and the two ends of the hydrophobic protective pipeline 16 are respectively connected with the hydrophobic pipeline upstream of the shut-off valve and the hydrophobic pipeline downstream of the check valve 15.

The diversion pipeline 10 and the return pipeline 12 are also equipped with stop valves.

The bottom of the condensed water tank 4 is provided with a drain port, and the drain port is connected with a drain line 18 , and the drain line 18 is provided with a shut-off valve.

A pump protection pipeline 17 is connected next to the gear pump 7, and both ends of the pump protection pipeline 17 are respectively connected with the upstream and downstream return pipelines of the gear pump 7, and the pump protection pipeline 17 is also equipped with a shut-off valve.

The end of the drain pipeline 2 is also provided with a direct flow pipeline 11 connected with the drain pipeline 2 and the recovery pipeline 8, and a shut-off valve is arranged on the direct flow pipeline 11. The setting of the direct current pipeline 11 can directly connect the condensed water into the recovery pipeline along the traditional operation method when the condensed water tank 4 breaks down, so as to ensure the operating efficiency of the equipment.

The application of the open-type drainage device for condensed water in the heat exchanger of the present invention avoids the accumulation of condensed water in the pipeline, eliminates the phenomenon of water hammer, improves the accuracy of temperature control, and realizes the control of condensed water while ensuring and improving the quality of process temperature and humidity. The maximum recovery effectively solves the problem of excessive back pressure in the condensate discharge system, reduces the occurrence of water hammer, stabilizes the stability of tobacco moisture control, and improves the reliability of the equipment.

In the present invention, due to the existence of the condensed water tank 4 provided in an open manner, the condensed water with steam is uniformly mixed with soft water in the condensed water tank 4 to realize cooling of the condensed water, and the water vapor in the condensed water will be directly discharged from the top opening of the condensed water tank 4 to reduce the occurrence of water hammer in subsequent pipeline transportation.

The invention also discloses a method for using an open-type drain device for condensed water in a heat exchanger, which includes the following steps:

1) Open the soft water pipeline 1 before starting the equipment, so that the condensed water tank 4 stores a certain amount of water, and the liquid level must be at least below the steam ejector 9, then close the soft water pipeline 1, and the liquid level in the condensed water tank 4 is determined by the magnetic level gauge 6 detection control;

2) Open the drainage pipeline 2, and after the equipment is turned on for heat exchange and drainage, the condensed water passes through the drainage pipeline 2 and enters the condensed water tank 4 from the steam injector 9 to mix with the soft water in the condensed water tank 4, and the condensed water tank 4 is controlled by the temperature sensor 3 Medium liquid temperature, when the liquid temperature in the condensate water tank 4 exceeds 60±5°C, the soft water pipeline 1 is opened again to keep the liquid temperature in the condensate water tank 4 constant;

3) When the liquid level in the condensed water tank 4 reaches the set height, the gear pump 7 is turned on to force the liquid in the condensed water tank 4 to be discharged into the recovery pipeline 8 .

The above method of use is simple to operate and easy to control, realizes maximum recovery of condensed water, effectively solves the problem of excessive back pressure in the condensed water discharge system, reduces the occurrence of water hammer, and stabilizes the stability of tobacco moisture control .

The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced without departing from it. Any modifications or partial replacements within the spirit and scope of the present invention shall fall within the scope of the claims of the present invention.

Claims (10)

1. An open-type drainage device for condensed water in a heat exchanger, comprising a drainage pipeline for conveying condensed water and a recovery pipeline for recovering condensed water, characterized in that it also includes an open-type condensed water tank at the top , the end of the drain pipeline is provided with a diversion pipeline connected to the drain pipeline and the condensed water tank, the end of the diversion pipeline extends into the condensed water tank, and the end of the diversion pipeline is provided with a steam ejector, condensing The water tank is also provided with a soft water inlet and a liquid outlet, the soft water inlet is located on the upper part of the condensed water tank, and the soft water inlet is connected with a soft water pipeline for delivering soft water to the condensed water tank, the liquid outlet is located at the lower part of the condensed water tank, and A return pipeline connecting the liquid outlet and the recovery pipeline is provided at the liquid outlet, and a pump is arranged on the return pipeline. 2. A heat exchanger condensed water open-type drainage device according to claim 1, characterized in that: the condensed water tank is provided with a liquid level gauge for detecting the liquid level in the tank and a liquid level gauge for detecting the liquid temperature in the tank. The temperature sensor, liquid level gauge is connected with the pump control. 3 . The open-type drainage device for condensed water of a heat exchanger according to claim 2 , wherein a solenoid valve is arranged on the soft water pipeline, and the solenoid valve is connected to the temperature sensor for control. 4 . 4 . The open-type drain device for condensed water of a heat exchanger according to claim 3 , wherein a shut-off valve, a drain valve and a check valve are sequentially arranged on the drain pipeline along the liquid flow direction. 5. A heat exchanger condensed water open-type drainage device according to claim 4, characterized in that: said drainage pipeline is connected with a drainage protection pipeline, and the two ends of the drainage protection pipeline are respectively connected to the upstream of the shut-off valve. The drain line connected to the drain line downstream of the check valve. 6. A heat exchanger condensed water open-type drainage device according to claim 5, characterized in that: the end of the drainage pipeline is also provided with a direct-flow pipeline connected with the drainage pipeline and the recovery pipeline, A shut-off valve is provided on the direct current pipeline. 7 . The open-type drainage device for condensed water of a heat exchanger according to claim 6 , wherein a shut-off valve is also arranged on the diversion pipeline and the return pipeline. 8 . 8. A heat exchanger condensed water open-type drainage device according to claim 7, characterized in that: the bottom of the condensed water tank is provided with a drain port, and the drain port is connected with a drain line, and the drain pipe A cut-off valve is arranged on the road; an overflow pipe is also connected to the condensed water tank. 9. A heat exchanger condensed water open-type drainage device according to claim 8, characterized in that: a pump protection pipeline is connected next to the pump, and the two ends of the pump protection pipeline are respectively connected to the upstream and downstream of the pump. Return line connection. 10. Based on the method for using a heat exchanger condensed water open-type drain device according to claim 9, it is characterized in that it comprises the following steps: 1) Open the soft water pipeline before starting the equipment to store a certain amount of water in the condensate tank. The liquid level must be at least below the steam injector, and then close the soft water pipeline. The liquid level in the condensate tank is detected and controlled by the liquid level gauge; 2) Open the drainage pipeline, and after the equipment is turned on for heat exchange and drainage, the condensed water enters the condensed water tank through the steam ejector through the drained pipeline to mix with the soft water in the condensed water tank, and the temperature sensor controls the temperature of the liquid in the condensed water tank. When the condensed water tank When the liquid temperature exceeds 60±5°C, the soft water pipeline is opened again to keep the liquid temperature in the condensate tank constant; 3) When the liquid level in the condensed water tank reaches the set height, the pump starts to force the liquid in the condensed water tank to be discharged into the recovery pipeline.