CN211289994U

CN211289994U - Waste heat recovery system

Info

Publication number: CN211289994U
Application number: CN201921459306.8U
Authority: CN
Inventors: 林敬尧
Original assignee: Etemal Special Material Zhuhai Co ltd
Current assignee: Etemal Special Material Zhuhai Co ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-08-18
Anticipated expiration: 2029-09-02

Abstract

The utility model belongs to the technical field of the chemical industry, specifically disclose a waste heat recovery system, including flash tank, hypergravity reboiler, condensation water pitcher and defrost system, the steam outlet end of flash tank with be equipped with the jet pump between the hypergravity reboiler, the condensation water outlet end of flash tank with the condensation water pitcher passes through the pipe connection, defrost system's import and export respectively with the condensation water pitcher passes through the pipe connection. Through the steam condensate water that will produce in the esterification technology, carry out waste heat recovery through the flash tank, flash steam is through reuse many times, and the comdenstion water is used for the defrosting, and final comdenstion water is used for boiler make-up water for make steam condensate water has obtained make full use of. The steam can be recovered for 20 hours every day according to the steam consumption of 8-10T/hr on the basis of 0.3MPa, the flash steam can be generated for 200kg/hr per ton, the steam can be recovered for 120T/month, and the recovered steam and condensed water are fully utilized.

Description

Waste heat recovery system

Technical Field

The utility model belongs to the technical field of the chemical industry, in particular to waste heat recovery system.

Background

Flashing is the sudden drop in pressure after high pressure saturated water enters a relatively low pressure vessel, causing the saturated water to partially change into saturated water vapor at the pressure of the vessel. Since the boiling point of the substance increases with increasing pressure and decreases with decreasing pressure, the pressure of the high-pressure and high-temperature fluid decreases when entering the flash tank, the boiling point thereof decreases, and the temperature of the fluid is higher than the boiling point at the pressure, and the fluid boils and vaporizes rapidly in the flash tank, and the two phases are separated.

A large amount of steam condensate water is generated in the esterification process, the temperature of the steam condensate water is high, the steam condensate water is difficult to cool in a short time, and meanwhile, the steam condensate water contains a large amount of latent heat and is a good heat source. At present, many enterprises do not make full use of the steam condensate water, and directly discharge the steam condensate water or use the steam condensate water as make-up water of circulating cooling water, so that the cooling process is prolonged, and the water and electricity consumption is increased.

The method for processing the steam condensate water generated in the esterification process by using the flash tank to form a steam-liquid two phase to obtain separation is a good method for recycling the steam condensate water, but the problem of insufficient utilization still exists at present.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a waste heat recovery system, can make the steam condensate water that produces in the esterification process obtain make full use of, the energy saving.

The utility model provides a waste heat recovery system, including flash tank, hypergravity reboiler, condensation water pitcher and defrost system, the steam outlet end of flash tank with be equipped with the jet pump between the hypergravity reboiler, the condensation water outlet end of flash tank with the condensation water pitcher passes through the pipe connection, defrost system's import and export respectively with the condensation water pitcher passes through the pipe connection.

Preferably, the jet pump has two air inlets and an exhaust port, wherein the first air inlet is connected with the flash tank, the second air inlet can be filled with fresh steam, and the exhaust port is connected with the hypergravity reboiler through a pipeline.

Further optimization, a condensed water outlet of the hypergravity reboiler is connected with the condensed water tank through a first pipeline; and a drain valve is arranged on the first pipeline.

And further optimizing, a second pipeline connected with the first pipeline in parallel is arranged on the first pipeline, and a valve is arranged on the second pipeline.

Further optimizing, a condensed water outlet of the hypergravity reboiler is connected with the defrosting system through a pipeline, and a drain valve is arranged on the pipeline connecting the condensed water outlet of the hypergravity reboiler and the defrosting system.

And further optimizing, wherein a pressure gauge is also arranged on the flash tank.

Further optimize, the bottom of the condensed water tank is also provided with a liquid outlet.

The waste heat recovery system at least has the following beneficial effects: steam condensate water generated in the esterification process passes through a flash tank, flash steam enters a hypergravity reboiler through an injection pump for processing materials, and enters a condensate water tank after being utilized by the hypergravity reboiler for subsequent processes; and meanwhile, condensed water generated by the flash tank enters a condensed water tank for defrosting, and finally, the defrosting and cooling water is discharged and used for supplementing water to the boiler. The above process makes full use of the steam condensate. According to the steam consumption of 0.3MPa and 8-10T/hr, the amount of flash steam generated per hour is 200kg/hr, the steam is normally recovered according to the steam unit price per ton and 200 yuan per day and 20 hours per day, 120T of steam can be recovered per month, and the recovered steam and condensed water are fully utilized.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples;

FIG. 1 is a schematic view of an embodiment of the present invention;

fig. 2 is a schematic diagram of another embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, the utility model provides a waste heat recovery system, including flash tank 10, hypergravity reboiler 30, condensation water tank 40 and defrost system 50, be equipped with jet pump 20 between the steam outlet end 11 of flash tank 10 and hypergravity reboiler 30, the condensation water outlet end 12 of flash tank 10 passes through the pipe connection with condensation water tank 40, and defrost system 50's import and export pass through the pipe connection with condensation water tank 40 respectively. The jet pump 20 has two suction ports and a vent port, wherein the first suction port 21 is connected with the flash tank 10, the second suction port 22 can be filled with fresh steam, and the vent port 23 is connected with the hypergravity reboiler 30 through a pipeline. The condensed water outlet 31 of the hypergravity reboiler 30 is connected with the defrosting system 50 through a pipeline, and a drain valve 32 is arranged on the pipeline, so that the condensed water is quickly discharged out of the hypergravity reboiler 30, and meanwhile, the leakage of steam is automatically prevented. The flash tank 10 is further provided with a pressure gauge 13 for monitoring the pressure in the flash tank. The bottom of the condensed water tank 40 is also provided with a liquid outlet 41, and water in the condensed water tank is periodically drained and is used for supplementing water to the boiler, so that the water is fully utilized.

The temperature of the steam condensate water generated by the esterification process is about 100-120 ℃, the steam condensate water enters a flash tank, flash steam and condensate water are generated under the pressure of 0.05MPa, the temperature of the flash steam is 100-120 ℃, and the temperature of the condensate water is less than 110 ℃. The flash steam pressure is lower, and through letting in the fresh steam that pressure is 0.6MPa to second induction port 22, the pressure energy becomes high-speed kinetic energy behind the nozzle, takes away the flash steam that gets into through first induction port 21, flow direction hypergravity reboiler 30 for the processing of material, utilizes the back through hypergravity reboiler 30, flows into defrost system 50 through the pipeline for the defrosting in the factory. Meanwhile, a part of the condensed water generated by the flash tank 10 enters the condensed water tank 40 for defrosting, and finally, the defrosted and cooled water is returned to the condensed water tank 40 and is periodically discharged for boiler make-up water. According to the steam consumption of 0.3MPa and 8-10T/hr, the amount of flash steam generated per hour is 200kg/hr, the steam is normally recovered according to the steam unit price per ton and 200 yuan per day and 20 hours per day, 120T of steam can be recovered per month, and the recovered steam and condensed water are fully utilized.

Referring to fig. 2, the utility model provides another kind of waste heat recovery system, including flash tank 10, hypergravity reboiler 30, condensate water tank 40 and defrost system 50, be equipped with jet pump 20 between the steam outlet end 11 of flash tank 10 and the hypergravity reboiler 30, the condensate water outlet end 12 of flash tank 10 passes through the pipe connection with condensate water tank 40, and defrost system 50's import and export pass through the pipe connection with condensate water tank 40 respectively. The jet pump 20 has two suction ports and a vent port, wherein the first suction port 21 is connected with the flash tank 10, the second suction port 22 can be filled with fresh steam, and the vent port 23 is connected with the hypergravity reboiler 30 through a pipeline. The condensed water outlet 31 of the hypergravity reboiler 30 is connected with the condensed water tank 40 through a first pipeline 60, and a drain valve 61 is arranged on the first pipeline 60, so that the condensed water can be rapidly discharged out of the hypergravity reboiler 30, and meanwhile, the leakage of the steam can be automatically prevented. The first pipeline 60 is provided with a second pipeline 62 connected in parallel with the first pipeline, and the second pipeline 62 is provided with a valve. When the trap fails, the second line 62 can be opened to allow the condensate from the supergravity reboiler 30 to drain to the condensate tank 40. The flash tank 10 is further provided with a pressure gauge 13 for monitoring the pressure in the flash tank. The bottom of the condensed water tank 40 is also provided with a liquid outlet 41, and water in the condensed water tank is periodically drained and is used for supplementing water to the boiler, so that the water is fully utilized.

The temperature of the steam condensate water generated by the esterification process is about 100-120 ℃, the steam condensate water enters a flash tank, flash steam and condensate water are generated under the pressure of 0.05MPa, the temperature of the flash steam is 100-120 ℃, and the temperature of the condensate water is less than 110 ℃. The flash steam pressure is lower, and through letting in the fresh steam that pressure is 0.6MPa to second induction port 22, the pressure energy becomes high-speed kinetic energy behind the nozzle, takes away the flash steam that gets into through first induction port 21, flows to hypergravity reboiler 30 for the processing of material, utilizes the back through hypergravity reboiler 30, flows into condensate water tank 40 through first pipeline 60, collects and stores. Meanwhile, a part of the condensed water generated by the flash tank 10 enters the condensed water tank 40 for defrosting, and finally, the defrosted and cooled water is returned to the condensed water tank 40 and is periodically discharged for boiler make-up water. According to the steam consumption of 0.3MPa and 8-10T/hr, the amount of flash steam generated per hour is 200kg/hr, the steam is normally recovered according to the steam unit price per ton and 200 yuan per day and 20 hours per day, 120T of steam can be recovered per month, and the recovered steam and condensed water are fully utilized.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A waste heat recovery system, comprising: flash tank, hypergravity reboiler, condensate water pitcher and defrost system, the steam outlet end of flash tank with be equipped with the jet pump between the hypergravity reboiler, the condensate water outlet end of flash tank with the condensate water pitcher passes through the pipe connection, defrost system's import and export respectively with the condensate water pitcher passes through the pipe connection.

2. A heat recovery system as recited in claim 1, wherein the jet pump has two inlets, a first inlet connected to the flash tank and a second inlet for steam, and an outlet connected to the high gravity reboiler via a pipe.

3. A waste heat recovery system as claimed in claim 1, wherein the condensate outlet of the supergravity reboiler is connected to the condensate tank by a first conduit.

4. A waste heat recovery system according to claim 3, characterized in that a second pipeline is arranged on the first pipeline in parallel, and a valve is arranged on the second pipeline.

5. The heat recovery system of claim 1, wherein a condensate outlet of the supergravity reboiler is piped to the defrost system.

6. The waste heat recovery system of claim 1, wherein a pressure gauge is further disposed on the flash tank.

7. The waste heat recovery system of claim 1, wherein the bottom of the condensate tank is further provided with a liquid drain.