A waste heat recovery system for a setting machine

Abstract

The present invention discloses a waste heat recovery system for a setting machine, including a flash tank, a condensate inlet, a flash steam outlet, a condensate outlet, an overflow port, a safety valve and a sewage outlet arranged on the tank body of the flash tank, and a power mechanical pump arranged outside the flash tank. Compared with the prior art, the present invention automatically adjusts the system pressure through a safety valve to ensure that the setting machine connected to the front end of the system can drain water smoothly; the present invention can adjust the water outlet valve and the steam exhaust valve according to the heat demand of the water washing machine connected to the rear end of the system, thereby adjusting the water volume of high-temperature condensate and flash steam, and recycling the wasted waste heat. Since the water washing machine does not need to use steam from the power plant, it can be produced smoothly, achieving the effect of reducing costs and increasing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, and in particular to a waste heat recovery system for a setting machine. Background Art

[0002] The traditional heating equipment of enterprises adopts the thermal oil heating process. After upgrading to the steam heating process for environmental protection, the large amount of high-temperature condensed water generated after steam heating can be recycled for waste heat, thus saving a lot of energy. The traditional waste heat recovery system has the hidden dangers of low recovery efficiency, energy waste, high system back pressure, affecting the drainage of front-end equipment, and water hammer. Due to the technical difficulties of waste heat recovery of condensed water, most enterprises are unable to efficiently recover the waste heat of high-temperature condensed water. Summary of the invention

[0003] The purpose of the present invention is to provide a waste heat recovery system for a stenter, which is used to recover and utilize the waste heat of high-temperature condensed water generated after heat exchange in the stenter through a heat exchanger, thereby saving a lot of energy.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention discloses a waste heat recovery system for a setting machine, comprising:

[0006] A flash tank, wherein the flash tank is used to separate steam and condensed water;

[0007] A condensed water inlet, which is arranged on the side wall of the flash tank and is connected to the water outlet of the setting machine through a pipeline;

[0008] A flash steam outlet, the flash steam outlet is arranged at the top of the flash tank, and the flash steam outlet conveys steam to the water scrubber through a pipeline;

[0009] A condensed water outlet, the condensed water outlet is arranged at the lower part of the flash tank and is located below the condensed water inlet;

[0010] An overflow port, the overflow port being arranged at the upper part of the flash tank and located above the condensed water inlet;

[0011] A safety valve, which is arranged at the upper part of the flash tank and between the condensed water inlet and the flash steam outlet, for realizing automatic pressure relief;

[0012] A sewage outlet, the sewage outlet being arranged at the bottom of the flash tank;

[0013] A power mechanical pump, wherein the inlet of the power mechanical pump is connected to the overflow port through a pipeline, and the outlet of the power mechanical pump is connected to the hot water tank through a pipeline.

[0014] Preferably, the sewage outlet is connected to the sewage collection structure through a pipeline, and a sewage valve is provided on the pipeline between the sewage outlet and the sewage collection structure.

[0015] Preferably, the condensate outlet is connected to the condensate collecting structure through a pipeline, and a water outlet valve is provided on the pipeline between the condensate outlet and the condensate collecting structure.

[0016] Preferably, a steam exhaust valve is provided on the pipeline between the flash steam outlet and the water scrubber.

[0017] Preferably, the power mechanical pumps are multiple and arranged in parallel.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The present invention automatically adjusts the system pressure through the safety valve to ensure that the shaping machine connected to the front end of the system can drain water smoothly; the present invention can adjust the water outlet valve and the steam exhaust valve according to the heat demand of the water washing machine connected to the back end of the system, thereby adjusting the amount of high-temperature condensed water and flash steam, and recycling the wasted waste heat. Since the water washing machine does not need to use power plant steam, it can be produced smoothly, achieving the effect of reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the waste heat recovery system of the setting machine in this embodiment;

[0022] Explanation of the reference numerals: 1. Flash tank; 2. Condensate inlet; 3. Flash steam outlet; 4. Condensate outlet; 5. Overflow port; 6. Safety valve; 7. Drain port; 8. Power mechanical pump. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The purpose of the present invention is to provide a waste heat recovery system for a stenter, which is used to recover and utilize the waste heat of high-temperature condensed water generated after heat exchange in the stenter through a heat exchanger, thereby saving a lot of energy.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 As shown, this embodiment provides a waste heat recovery system for a setting machine, including a flash tank 1, a condensate inlet 2, a flash steam outlet 3, a condensate outlet 4, an overflow port 5, a safety valve 6 and a drain port 7 arranged on the tank body of the flash tank 1, and a power mechanical pump 8 arranged outside the flash tank 1.

[0027] Among them, the flash tank 1 is used to separate steam and condensed water. The condensed water inlet 2 is arranged on the side wall of the flash tank 1, and the condensed water inlet 2 is connected to the water outlet of the setting machine through a pipeline. The flash steam outlet 3 is arranged at the top of the flash tank 1, and the flash steam outlet 3 conveys steam to the washing machine through a pipeline. The condensed water outlet 4 is arranged at the lower part of the flash tank 1 and is located at the lower side of the condensed water inlet 2. The overflow port 5 is arranged at the upper part of the flash tank 1 and is located at the upper side of the condensed water inlet 2. The safety valve 6 is arranged at the upper part of the flash tank 1 and is located between the condensed water inlet 2 and the flash steam outlet 3 to achieve automatic pressure relief. The sewage outlet 7 is arranged at the bottom of the flash tank 1. The inlet of the power mechanical pump 8 is connected to the overflow port 5 through a pipeline, and the outlet of the power mechanical pump 8 is connected to the hot water tank through a pipeline.

[0028] When in use, the high-temperature condensed water of the setting machine is transported through the pipeline, enters the flash tank 1 through the condensed water inlet 2, and is separated into condensed water and flash steam in the flash tank 1. The flash steam rises and is transported to the washing machine through the flash steam outlet 3 and the pipeline, so that the washing machine can supply flash steam by itself, and can smoothly produce without the need for power plant steam, saving energy costs; the condensed water accumulates at the bottom of the flash tank 1, and overflows when the water level of the condensed water reaches the overflow port 5, and is transported to the power mechanical pump 8 through the pipeline, and is pumped to the hot water pool by the power mechanical pump 8 for secondary use. Since the temperature of the bottom condensed water is lower than that of the top condensed water, it is not suitable for transport to the hot water pool, and can be discharged from the condensed water outlet 4 for other purposes. The sewage outlet 7 is set at the bottom of the flash tank 1 to facilitate the discharge of sewage after cleaning the inner wall of the flash tank 1. The system does not require electric drive, and a safety valve 6 is provided on the flash tank 1. When the pressure in the flash tank 1 exceeds the preset pressure, the pressure can be automatically adjusted, thereby improving safety, and can be used in explosion-proof areas. By using the power mechanical pump 8 instead of the electric centrifugal pump, there are no hidden dangers of the electric centrifugal pump such as mechanical seal and impeller damage, the reliability is better, the service life is longer, and maintenance and repair can be carried out online without moving the pipes, simplifying the installation and piping.

[0029] In this embodiment, the sewage outlet 7 is connected to the sewage collection structure through a pipeline, and a sewage valve is arranged on the pipeline between the sewage outlet 7 and the sewage collection structure. When the inside of the flash tank 1 is cleaned, sewage discharge is controlled by the sewage valve.

[0030] In this embodiment, the condensed water outlet 4 is connected to the condensed water collection structure through a pipeline, and a water outlet valve is provided on the pipeline between the condensed water outlet 4 and the condensed water collection structure. The lower condensed water can be discharged to the condensed water collection structure through the water outlet valve to control the amount of condensed water in the flash tank 1.

[0031] In this embodiment, a steam exhaust valve is provided on the pipeline between the flash steam outlet 3 and the water scrubber to facilitate control of the steam exhaust process.

[0032] In this embodiment, there are four power mechanical pumps 8 arranged in parallel, which can supply up to six washing machines at the same time, saving 12 tons of steam per hour and saving more than 10 million yuan in energy costs per year.

[0033] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A waste heat recovery system for a setting machine, characterized in that: include: A flash tank, wherein the flash tank is used to separate steam and condensed water; A condensed water inlet, which is arranged on the side wall of the flash tank and is connected to the water outlet of the setting machine through a pipeline; A flash steam outlet, the flash steam outlet is arranged at the top of the flash tank, and the flash steam outlet conveys steam to the water scrubber through a pipeline; A condensed water outlet, the condensed water outlet is arranged at the lower part of the flash tank and is located below the condensed water inlet; An overflow port, the overflow port being arranged at the upper part of the flash tank and located above the condensed water inlet; A safety valve, which is arranged at the upper part of the flash tank and between the condensed water inlet and the flash steam outlet, for realizing automatic pressure relief; A sewage outlet, the sewage outlet being arranged at the bottom of the flash tank; A power mechanical pump, wherein the inlet of the power mechanical pump is connected to the overflow port through a pipeline, and the outlet of the power mechanical pump is connected to the hot water tank through a pipeline; The condensate outlet is connected to the condensate collection structure through a pipeline, and a water outlet valve is provided on the pipeline between the condensate outlet and the condensate collection structure; The power mechanical pumps are multiple and arranged in parallel.

2. The waste heat recovery system of the setting machine according to claim 1 is characterized in that: The sewage outlet is connected to the sewage collection structure through a pipeline, and a sewage valve is arranged on the pipeline between the sewage outlet and the sewage collection structure.

3. The waste heat recovery system of the setting machine according to claim 1 is characterized in that: A steam exhaust valve is provided on the pipeline between the flash steam outlet and the water scrubber.

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