CN220541798U - A low-pressure exhaust steam and condensate water thermal energy efficient utilization system - Google Patents

Abstract

The utility model discloses a low-pressure exhaust steam and condensed water heat energy efficient utilization system, which comprises an input pipeline for inputting high-temperature condensed water, wherein the output end of the input pipeline is provided with a flash evaporator for separating water from the input high-temperature condensed water, the right side of the flash evaporator is provided with a heat exchange system for utilizing the heat energy of the high-temperature condensed water, the heat exchange system comprises a first heat exchanger for utilizing the low-pressure condensed water discharged by the flash evaporator, a second heat exchanger for utilizing flash steam and noncondensable steam discharged by the flash evaporator is arranged above the first heat exchanger, and the right side of the second heat exchanger is provided with a water tank matched with the first heat exchanger and the second heat exchanger. The utility model solves the problem of lower heat energy utilization efficiency of the traditional condensed water heat energy utilization system in the prior art. The utility model has the advantages of simple structure, convenient use, high heat utilization rate and the like.

Description

A low-pressure exhaust steam and condensate water thermal energy efficient utilization system

Technical field

The utility model relates to a high-temperature condensed water recovery and utilization system, and more specifically, to a low-pressure exhaust steam and condensed water thermal energy efficient utilization system.

Background technique

Currently, a waste steam and hot water heat energy recovery system has been disclosed on China Patent Online, Publication No. CN208410485U, which includes: a water vapor separator connected to the steam discharge pipe; a waste steam and condensed water collection device connected to the top of the water vapor separator The first steam outlet is connected; the first hot water pump is connected to the first condensed water outlet at the bottom of the water vapor separator, wherein the first hot water pump is connected to the waste steam and condensed water collection device; the condensed water tank is connected to the first hot water pump , wherein the second condensed water outlet of the condensed water tank is connected to the steam discharge pipe; wherein the condensed water tank is connected to the third condensed water outlet at the bottom of the waste steam and condensed water collection device, wherein the top of the waste steam and condensed water collection device The second steam outlet is connected with the first steam delivery pipe. Through the above method, the waste steam and hot water heat energy recovery system disclosed in the present utility model can recover the waste steam and condensed water discharged from the foam molding machine, which can significantly reduce steam consumption and improve the working environment.

The condensed water discharged from the heat exchanger and the sealed steam direct heating container in the above patent contains a large amount of non-condensable gases, pollutants and available heat energy. Direct discharge will cause environmental pollution and energy waste. The condensed water needs to be cooled and processed. emission. Non-condensable gas is mixed with condensed water and flash steam, and the heat transfer coefficient is small, which affects the heat exchange efficiency, so the heat energy utilization rate of the condensed water is low. The condensate water has a high temperature and is in the state of a mixture of steam and water in the pipeline. If the water pump is directly used to transport the water, the pump will soon be damaged by cavitation. Not suitable for long-distance heat transfer.

Utility model content

In order to overcome the problem of low thermal energy utilization efficiency of the traditional condensate water thermal energy utilization system existing in the prior art, the utility model now provides a low-pressure exhaust steam and condensate water thermal energy efficient utilization system with the advantage of higher thermal energy utilization rate. .

The utility model provides a low-pressure exhaust steam and condensate water thermal energy efficient utilization system, which includes an input pipe for inputting high-temperature condensed water. The output end of the input pipe is provided with a flash for water vapor separation of the input high-temperature condensed water. Evaporator, the right side of the flash evaporator is provided with a heat exchange system for utilizing the thermal energy of high-temperature condensed water. The heat exchange system includes a No. 1 heat exchanger for utilizing the low-pressure condensed water discharged from the flash evaporator. There is a No. 2 heat exchanger above the No. 1 heat exchanger for utilizing the flash steam and non-condensable gas discharged from the flash evaporator. On the right side of the No. 2 heat exchanger, there is a heat exchanger with the No. 1 heat exchanger and the No. 2 heat exchanger. Water tank used with heater.

Preferably, the right output end of the input pipe is connected to the left input end of the flash evaporator through a flange, and the upper end of the flash evaporator is provided with an outlet for discharging the generated flash steam and non-condensable gas. , the lower end of the flash evaporator is provided with a drain port for discharging the generated low-pressure condensate water, and the left input end of the No. 1 heat exchanger is connected to the drain port of the flash evaporator by a drain pipe. The left input end of the No. 2 heat exchanger is connected to the flash steam outlet through a steam pipe.

Preferably, the cooling water input end at the lower end of the No. 1 heat exchanger is connected to the cooling water output end at the left end of the water tank through a cooling pipe and a hydraulic pump, and the cooling water output end at the upper end of the No. 1 heat exchanger is connected. It is connected to the cooling water input end at the lower end of the No. 2 heat exchanger through a delivery pipe, and the cooling water output end at the upper end of the No. 2 heat exchanger is connected to the cooling water return end at the upper end of the water tank through a return pipe.

Preferably, the right side of the No. 1 heat exchanger is provided with a sewage main pipe for collecting and discharging the condensed water after heat exchange. The output end of the right end of the No. 1 heat exchanger and the lower end of the No. 2 heat exchanger are The output end is respectively connected to the input end of the sewage main pipe through pipes and flanges. The upper end of the No. 2 heat exchanger is provided with a steam exhaust port for discharging non-condensable gas after heat exchange.

Before the condensed water enters the heat exchanger, it is first flashed to separate the water vapor. Hot water is concentrated in the lower part of the flash evaporator, and steam is concentrated in the upper part of the flash evaporator. When the amount of condensed water is small, the pipeline can be enlarged and used as a flash evaporator. The No. 1 heat exchanger is a water-to-water heat exchanger, installed at a low position, and the installation height is lower than the water outlet at the bottom of the flash evaporator. The hot water in the lower part of the flash evaporator naturally flows into the No. 1 heat exchanger by gravity and is discharged through the heat exchanger outlet. The No. 2 heat exchanger is a water-vapor heat exchanger, installed at a high position, and the installation height is higher than the upper steam outlet of the flash evaporator. Flash steam and non-condensable gas are discharged from the upper steam outlet of the flash evaporator and enter the No. 2 heat exchanger. After heat exchange, the steam condenses into water and is discharged from the drainage system. The non-condensable gas will not condense into water after cooling. The non-condensable gas has a low density and is discharged from the exhaust port on the upper part of the No. 2 heat exchanger. Prevent non-condensable gas from concentrating in the heat exchanger and affecting heat exchange efficiency. In addition, after the flash steam and hot water are separated, they enter different heat exchangers, and the heat exchange efficiency is greatly improved. The water in the water tank is first sent to the No. 1 heat exchanger through the water pump for heat exchange. After heat exchange in the No. 1 heat exchanger, it enters the No. 2 heat exchanger from the upper outlet for heat exchange, and then returns to the water tank. The hot water is used for the process. . After two stages of heat exchange, the hot water maintains a higher temperature. After sufficient heat exchange, the temperature of the condensed water is greatly reduced and discharged into the sewage main pipe, which utilizes thermal energy while avoiding the unorganized discharge of high-temperature condensed water flash steam.

The utility model has the following beneficial effects: simple structure, convenient use and high thermal energy utilization rate.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

Input pipe 1, flash evaporator 2, No. 1 heat exchanger 3, No. 2 heat exchanger 4, water tank 5, sewage main pipe 6.

Detailed ways

The technical solution of the present utility model will be further described in detail through examples and in conjunction with the accompanying drawings.

Embodiment: The utility model will be further described according to the accompanying drawing 1. In this example, a low-pressure exhaust steam and condensed water thermal energy efficient utilization system includes an input pipe 1 for inputting high-temperature condensed water. The output of the input pipe 1 A flash evaporator 2 is provided at one end for water vapor separation of the input high-temperature condensed water. A heat exchange system for utilizing the thermal energy of the high-temperature condensed water is provided on the right side of the flash evaporator 2. The heat exchange system includes a The No. 1 heat exchanger 3 is used for the low-pressure condensate water discharged from the flash evaporator 2. A No. 2 heat exchanger 4 is provided above the No. 1 heat exchanger 3 for utilizing the flash steam and non-condensable gas discharged from the flash evaporator 2. There is a water tank 5 used in conjunction with the No. 1 heat exchanger 3 and the No. 2 heat exchanger 4 on the right side of the No. 2 heat exchanger 4.

The right output end of the input pipe 1 is connected to the left input end of the flash evaporator 2 through a flange. The upper end of the flash evaporator 2 is provided with an outlet for discharging the generated flash steam and non-condensable gas. , the lower end of the flash evaporator 2 is provided with a drain port for discharging the generated low-pressure condensed water, and the left input end of the No. 1 heat exchanger 3 is connected to the drain port of the flash evaporator 2 through a drain pipe. The left input end of the No. 2 heat exchanger 4 is connected to the discharge outlet of the flash steam through a steam pipe.

The cooling water input end of the lower end of the No. 1 heat exchanger 3 is connected to the cooling water output end of the left end of the water tank 5 through a cooling pipe and a hydraulic pump. The cooling water output end of the upper end of the No. 1 heat exchanger 3 is connected. It is connected to the cooling water input end of the lower end of the No. 2 heat exchanger 4 through a delivery pipe, and a return pipe is provided between the cooling water output end of the upper end of the No. 2 heat exchanger 4 and the cooling water return end of the upper end of the water tank 5. connected.

The right side of the No. 1 heat exchanger 3 is provided with a sewage main pipe 6 for collecting and discharging the condensed water after heat exchange. The output end of the right end of the No. 1 heat exchanger 3 and the lower end of the No. 2 heat exchanger 4 The output end of the heat exchanger 4 is respectively connected to the input end of the sewage main pipe 6 through pipes and flanges. The upper end of the No. 2 heat exchanger 4 is provided with an exhaust port for discharging non-condensable gas after heat exchange.

The above are only specific embodiments of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art in the field of the present utility model are covered by the present utility model. Within the scope of new patents.

Claims (4)

1. The utility model provides a low pressure exhaust steam and comdenstion water heat energy high efficiency utilization system, includes input pipeline (1) that is used for inputing high temperature comdenstion water, characterized by, the output of input pipeline (1) be equipped with flash vessel (2) that are used for carrying out water vapor separation to the high temperature comdenstion water of input, the right side of flash vessel (2) be equipped with the heat transfer system who is used for utilizing high temperature comdenstion water heat energy, heat transfer system including being used for utilizing flash vessel (2) exhaust low pressure comdenstion water first heat exchanger (3), first heat exchanger (3) top be equipped with be used for utilizing flash vessel (2) exhaust flash steam and noncondensable steam second heat exchanger (4), second heat exchanger (4) right side be equipped with first heat exchanger (3) and second heat exchanger (4) cooperation water tank (5).

2. The high-efficiency low-pressure exhaust steam and condensed water heat energy utilization system according to claim 1 is characterized in that the right side output end of the input pipeline (1) is connected with the left side input end of the flash evaporator (2) through a setting flange, the upper end of the flash evaporator (2) is provided with a discharge port for discharging generated flash steam and noncondensable steam, the lower end of the flash evaporator (2) is provided with a drain port for discharging generated low-pressure condensed water, the left side input end of the first heat exchanger (3) is connected with the drain port of the flash evaporator (2) through a setting drain pipeline, and the left side input end of the second heat exchanger (4) is connected with the discharge port of the flash steam through a setting steam pipeline.

3. The low-pressure exhaust steam and condensed water heat energy efficient utilization system according to claim 1 is characterized in that a cooling water input end of the lower end of the first heat exchanger (3) is connected with a cooling water output end of the left end of the water tank (5) through a cooling pipeline and a hydraulic pump, a cooling water output end of the upper end of the first heat exchanger (3) is connected with a cooling water input end of the lower end of the second heat exchanger (4) through a conveying pipeline, and a cooling water output end of the upper end of the second heat exchanger (4) is connected with a cooling water backflow end of the upper end of the water tank (5) through a backflow pipeline.

4. The low-pressure exhaust steam and condensed water heat energy efficient utilization system according to claim 1 is characterized in that a drain header pipe (6) for collecting and discharging condensed water subjected to heat exchange is arranged on the right side of the first heat exchanger (3), an output end of the right end of the first heat exchanger (3) and an output end of the lower end of the second heat exchanger (4) are connected with an input end of the drain header pipe (6) through a set pipeline and a flange respectively, and a steam outlet for discharging noncondensable steam after heat exchange is formed in the upper end of the second heat exchanger (4).