CN108654127A - A kind of steam condensate recovery system - Google Patents

Abstract

The invention belongs to reclamation of condensate water technical fields, more particularly to a kind of steam condensate recovery system, including steam flash slot, steam flash slot is connect with high pressure steam condensate from the user, flash-off steam pipeline one, the connecting pipe and steam condensate tank inlet communication that lime set passes through bottom are set on steam flash slot；Steam condensate tank upper end is connected to low-pressure steam lime set from the user, steam condensate tank is equipped with flash-off steam pipeline two, the lime set being collected into is pumped to system user heat exchange by steam condensate cycle, hot-water cylinder is sent into after heat exchange, the lime set that hot-water cylinder is collected into after hot water supplying pump by dividing two-way, it is wherein sent to refrigeration station all the way, another way is used for rinsing total pipeline, hot-water cylinder upper gas outlet conduit is equipped with meteorological chuck one, meteorological chuck one will be back in hot-water cylinder after the vapor cooling being discharged in hot-water cylinder by recirculated cooling water and be collected, the present invention has simple in structure, advantage easy to use.

Description

A steam condensate recovery system

technical field

The invention belongs to the technical field of steam condensate recovery, and in particular relates to a steam condensate recovery system.

Background technique

In industrial production, steam, as an extremely versatile energy source, is inseparable from almost all enterprises. A large amount of industrial water and coal-based energy are used to generate steam, and the heat of steam is used to realize In the industrial production process, the condensed water produced after the steam releases part of the heat energy is often drained. In this way, on the one hand, the condensed water also carries a large amount of heat energy, which will cause waste of heat energy; Circulating water: There are two existing steam condensate recovery methods, flash under pressure and flash under normal pressure. In flash under pressure and flash under normal pressure, the steam condensate at the bottom of the flash tank is generally cooled by circulating water After entering the desalinated water refining process, the heat energy in the steam condensate is not fully utilized and a lot of circulating water is wasted.

Contents of the invention

The purpose of the present invention is to provide a steam condensate recovery system to solve the problems of waste of heat energy and water resources in flash evaporation equipment in the prior art.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A steam condensate recovery system, including a steam flash tank, the side of the steam flash tank is connected with the high and medium pressure steam condensate from the system user through pipelines, and the upper end of the steam flash tank is provided with a flash steam pipeline for gas discharge 1. The condensate collected by the steam flash tank is connected to the inlet of the steam condensate tank through the connecting pipe at the bottom of the steam flash tank; the upper inlet of the steam condensate tank is connected to the low-pressure steam condensate from the system user through a pipeline, The upper end of the steam condensate tank is also equipped with a flash steam pipeline 2 for gas discharge. The condensate collected by the steam condensate tank is pumped to the system user for heat exchange through the steam condensate cycle pump, and then sent to the hot water tank for feeding The condensate collected in the hot water tank is cooled by the hot water delivery pump and then divided into two routes, one of which is sent to the freezing station, and the other is used to flush the main pipeline. The gas outlet pipe on the upper part of the hot water tank is equipped with a weather jacket One, the weather jacket one cools and liquefies the water vapor discharged from the hot water tank through circulating cooling water, and returns it to the hot water tank for collection.

Further, the inlet at the upper end of the hot water tank is also connected with the outlet from the low-pressure condensate collection tank, and the upper end of the low-pressure condensate collection tank is connected with the condensate from the system pipeline through a pipeline, and the low-pressure condensate The outlet of the liquid collection tank is sent to the inlet of the hot water tank through the low-pressure condensate delivery pump. The gas outlet pipe on the upper part of the low-pressure condensate collection tank is provided with a weather jacket 2, and the weather jacket 2 will circulate cooling water from the low-pressure water to the hot water tank. The water vapor discharged from the condensate collection tank is cooled and liquefied and then returned to the low-pressure condensate collection tank for collection.

Further, the steam flash tank, the steam condensate tank, the hot water tank and the low-pressure condensate collection tank are all equipped with liquid level regulating valves.

Further, both the steam flash tank and the steam condensate tank are provided with safety valves.

Further, the steam condensate tank is provided with a steam coil. When starting up, the steam coil is connected with an external heat source, and the amount of heat source is controlled through a heat source valve. The steam condensate tank is also provided with a water replenishment port. When adding water.

Further, the steam condensate tank is also provided with an overflow pipe, the liquid level regulating valve on the steam condensate tank is located on the overflow pipe, and the outlet of the overflow pipe communicates with the inlet of the hot water tank.

Further, both the first flash steam pipeline and the second flash steam pipeline are provided with flash steam pressure regulating valves.

Further, the steam pressure after flashing in the steam flash tank is 0.5Mpa, and the steam pressure after flashing in the steam condensate tank and the low-pressure condensate collection tank is 0.15Mpa.

The advantages of the present invention are: after the steam condensate recovery system in the present invention is flashed by setting the steam flash tank, the high and medium pressure saturated steam condensate flash steam enters the steam pipe network as a heat source for reuse, and the condensate and low-pressure steam After the condensate enters the steam condensate tank for further flash evaporation, the flash steam is sent to the low-pressure pipe network to be used as part of the heating source of the system, and the collected condensate is sent to the system user for heat exchange through the steam condensate circulating pump. After heating, it is sent to the hot water tank for collection and use, and the condensate from the system pipeline is collected by the low-pressure condensate collection tank and then sent to the hot water tank for recycling. In the entire recovery system, heat energy and circulating water All have been fully utilized, which not only saves energy but also increases the benefits of the enterprise.

Description of drawings

Fig. 1 is a process flow diagram of the present invention.

1. Steam flash tank; 2. Steam condensate tank; 3. Steam condensate circulation pump; 4. Hot water tank; 5. Low and low pressure condensate collection tank; 6. Hot water delivery pump; 7. Low and low pressure condensate Conveying pump; 8. Flash steam pressure regulating valve; 9. Liquid level regulating valve; 10. Safety valve; 11. Heat source valve; 12. Meteorological jacket 1; 13. Meteorological jacket 2.

Detailed ways

As shown in Figure 1, a steam condensate recovery system includes a steam flash tank 1, and the side of the steam flash tank 1 is connected to the high and medium pressure steam condensate from the system user with a pressure of 1.4~3.5Mpa through a pipeline. The temperature of the condensate in the steam flash tank 1 is 151°C, and the upper end of the steam flash tank 1 is provided with a flash steam pipeline 1 for gas discharge. The steam pressure of the steam flash tank 1 after flashing is 0.5Mpa. Once the steam pipe is discharged, it enters the user system for reuse in the steam pipe network of 0.4Mpa. The flash steam pipe 1 is provided with a flash steam pressure regulating valve 8, and the steam flash tank 1 is provided with a safety valve 10. When the steam flash When the pressure in the tank 1 is high, a part of the steam can be released through the safety valve 10, and a liquid level regulating valve 9 is provided on the side of the steam flash tank 1, and the liquid level regulating valve 9 is controlled by the liquid level control system. When the steam flash tank 1 When the liquid level is high, the liquid level control system controls the opening of the liquid level regulating valve 9 to increase, and vice versa, the condensate collected in the steam flash tank 1 is condensed with the steam through the connecting pipe at the bottom of the steam flash tank 1 The inlet of the liquid tank 2 is connected; the inlet of the upper end of the steam condensate tank 2 is connected with the 0.4~1.4Mpa low-pressure steam condensate from the system user through the pipeline, and the upper end of the steam condensate tank 2 is also provided with flash steam for gas discharge Pipeline 2, the temperature in the steam condensate tank 2 is 120°C, the steam pressure of the steam condensate tank 2 after flashing is 0.15Mpa, and the condensate temperature is 120°C, and the flash steam is then incorporated into the low-pressure pipe network as a system Part of the heating source is used. The flash steam pipeline 2 is equipped with a flash steam pressure regulating valve 8, and the steam condensate tank 2 is equipped with a safety valve 10. When the pressure in the steam condensate tank 2 is high, it can pass through the safety valve 10. To release a part of the steam, the steam condensate tank 2 is also provided with an external delivery pipeline, the liquid level regulating valve 9 on the steam condensate tank 2 is located on the external delivery pipeline, and the inlet of the external delivery pipeline communicates with the outlet of the steam condensate circulation pump 3 , the outlet of the delivery pipeline is communicated with the inlet of the hot water tank 4, and the liquid level control valve 9 is controlled by the liquid level control system. When the liquid level of the steam condensate tank 2 is high, the liquid level control system controls the liquid level control valve 9 A part of the steam condensate is directly sent to the hot water tank 4. The temperature of the water in the hot water tank 4 is 95°C. The condensate collected in the steam condensate tank 2 is regulated by the steam condensate circulation pump 3 and then sent to the system user for replacement. After the heat exchange, it is sent to the feed port of the hot water tank 4, and the steam condensate tank 2 is provided with a steam coil. When starting up at the beginning, because the system has less condensate, the equipment requiring heat exchange has no CCL heat source. At this time, it is necessary to open the water supply port on the steam condensate tank 2, and control the amount of heat source through the heat source valve 11 to ensure that there is sufficient CCL supply in the system to ensure the normal and safe operation of the system; the condensate collected by the hot water tank 4 passes through the heat After the water delivery pump is processed, it is divided into two routes, one of which is sent to the freezing station, and the regulating valve on the pipeline sent to the freezing station is a liquid level regulating valve 9, which can be used as a liquid level regulating valve when the water level of the hot water tank 4 is high 9, the other is used to flush the main pipeline, and the gas outlet pipeline on the upper part of the hot water tank 4 is provided with a weather jacket-12. Jacket one 12 cools and liquefies the water vapor discharged from the hot water tank 4 through circulating cooling water and returns it to the hot water tank 4 for collection; The outlet of the tank 5 is connected, and the upper end of the low-pressure condensate collection tank 5 is connected with the heating condensate from the system pipeline with a temperature of 80-90°C through a pipeline, and the outlet of the low-pressure condensate collection tank 5 passes through the low-pressure condensate After the delivery pump 7 is processed, it is sent to the inlet of the hot water tank 4, and the gas outlet pipeline on the upper part of the low-pressure condensate collection tank 5 is provided with a weather jacket 2 13, and the weather jacket 2 13 will circulate the cooling water from the low-pressure condensate The water vapor discharged from the collection tank 5 is cooled and liquefied and then returned to the low-pressure condensate collection tank 5 for collection. The liquid level regulating valve 9 on the low-pressure condensate collection tank 5 is located between the outlet of the low-pressure condensate delivery pump 7 and the hot water tank. 4 Between the inlets, the steam pressure of the low-pressure condensate collection tank 5 after flash evaporation is 0.15Mpa, and there are two steam condensate circulation pumps 3, hot water delivery pumps 6 and low-pressure condensate delivery pumps 7 in the whole system, One of them is used as a backup.

The steam condensed water recovery system in the present invention is flashed by setting the steam flash tank 1, and the flashed steam enters the steam pipe network as a heat source for reuse, and the condensate and low-pressure steam condensate enters the steam condensate tank 2 for further flashing After steaming, the flash steam is sent to the low-pressure pipe network to be used as part of the heat tracing heat source of the system. The collected condensate is sent to the system user for heat exchange through the steam condensate circulation pump 3. After the heat exchange is completed, it is sent to the hot water tank 4 for heating. Collected and used, while the condensate from the heat tracing in the system pipeline is collected by the low-pressure condensate collection tank 5 and then sent to the hot water tank 4 for recycling. In the entire recovery system, heat energy and circulating water are fully utilized, both It saves energy and increases the benefit of the enterprise.

Claims (8)

1. a kind of steam condensate recovery system, it is characterised in that：Including steam flash slot, steam flash slot side passes through pipeline It is connect with the high pressure steam condensate from system user, steam flash slot upper end is equipped with the flash-off steam pipeline of supplied gas discharge One, the connecting pipe and steam condensate tank inlet communication that the lime set that steam flash slot is collected into passes through steam flash trench bottom； Steam condensate tank upper end import is connected to by pipeline with the low-pressure steam lime set from system user, steam condensate tank Upper end is additionally provided with the flash-off steam pipeline two of supplied gas discharge, and the lime set that steam condensate tank is collected into is followed by steam condensate Ring is pumped to system user heat exchange, is sent into hot-water cylinder feed inlet after exchanging heat, the lime set that hot-water cylinder is collected into passes through delivery Divide two-way after pump cooling treatment, wherein being sent to refrigeration station all the way, another way is used for rinsing total pipeline, the outlet of hot-water cylinder upper gas Pipeline is equipped with meteorological chuck one, and the meteorology chuck one is cooled down the vapor being discharged from hot-water cylinder by recirculated cooling water It is back in hot-water cylinder and collects after liquefaction.

2. steam condensate recovery system as described in claim 1, it is characterised in that：Hot-water cylinder upper end import also with come It is connected from the outlet of low pressure lime set collecting tank, the low pressure lime set collecting tank upper end is by pipeline and comes from system pipeline The lime set of heat tracing is connected, and hot-water cylinder import is sent in the outlet of low pressure lime set collecting tank by low pressure lime set delivery pump, low Lime set collecting tank upper gas outlet conduit is pressed to be equipped with meteorological chuck two, the meteorology chuck two will be from by recirculated cooling water It is back in low pressure lime set collecting tank and collects after the vapor cooling liquid being discharged in low pressure lime set collecting tank.

3. steam condensate recovery system as claimed in claim 2, it is characterised in that：The steam flash slot, steam condensation It is equipped with Liquid level adjusting valve on flow container, hot-water cylinder and low pressure lime set collecting tank.

4. steam condensate recovery system as claimed in claim 3, it is characterised in that：The steam flash slot and steam condensation Safety valve is equipped on flow container.

5. steam condensate recovery system as claimed in claim 4, it is characterised in that：It is equipped with and steams in the steam condensate tank Vapour coil pipe, when driving, steam pipe coil is connected with external heat source, and controls heat source amount, steam condensate tank by heat source valve On be additionally provided with water supplement port, drive when for plus water.

6. steam condensate recovery system as claimed in claim 5, it is characterised in that：It is additionally provided on the steam condensate tank One is sent outside pipeline, the Liquid level adjusting valve on the steam condensate tank be located at sends outside on pipeline, it is described send outside pipe outlet with Hot-water cylinder inlet communication.

7. steam condensate recovery system as claimed in claim 6, it is characterised in that：Flash-off steam pipeline one and flash-off steam Flash-off steam pressure-regulating valve is equipped on pipeline two.

8. steam condensate recovery system as claimed in claim 7, it is characterised in that：Steaming after the steam flash slot flash distillation Steam pressure is 0.5Mpa, and the steam pressure after steam condensate tank and the flash distillation of low pressure lime set collecting tank is 0.15Mpa.