Heat exchange device used before steam discharge

Abstract

The utility model relates to a heat exchange device before steam discharge, which comprises a first heat exchange barrel, a second heat exchange barrel, a first spiral pipe and a second spiral pipe, the first spiral pipe is fixedly connected in the first heat exchange barrel, an inlet of the first spiral pipe is positioned on the outer side of the first heat exchange barrel, and the second spiral pipe is fixedly connected in the second heat exchange barrel. An outlet of the second spiral pipe is located in the first heat exchange barrel, the first spiral pipe and the second spiral pipe are communicated between the first heat exchange barrel and the second heat exchange barrel, an air inlet pipe is arranged at the upper end of the first heat exchange barrel, a ventilation pipe is arranged between the first heat exchange barrel and the second heat exchange barrel, and an outlet of the ventilation pipe is located in the bottom area in the second heat exchange barrel. An air outlet pipe is arranged at the upper end of the second heat exchange barrel. The temperature of tap water in the water tank of the boiler is increased by about 10 DEG C, energy consumption is reduced, production cost is saved, and finally steam is discharged from the steam outlet pipe after the temperature of the steam is reduced to the temperature meeting the emission standard.

Description

Technical Field

[0001] This utility model relates to the field of energy recovery technology, specifically to a heat exchange device before steam emission. Background Technology

[0002] In the lightweight organic polymer industry, steam is often used as a reaction medium, providing heating or drying. However, due to emission requirements, steam passing through the process units must be cooled to meet emission standards before being released. In the current production line, with a total boiler capacity of nearly 40 tons and an annual steam supply of approximately 100,000 tons, the steam temperature after discharge remains at 70 to 80°C, resulting in significant energy waste. Furthermore, the excessively high steam discharge temperature fails to meet emission standards. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a heat exchange device before steam discharge, which saves energy and reduces the temperature of steam discharge.

[0004] The technical solution of this utility model is as follows: a heat exchange device before steam discharge, comprising a first heat exchange barrel, a second heat exchange barrel, a first spiral tube, and a second spiral tube. The first spiral tube is fixedly connected inside the first heat exchange barrel, and the inlet of the first spiral tube is located outside the first heat exchange barrel. The second spiral tube is fixedly connected inside the second heat exchange barrel, and the outlet of the second spiral tube is located inside the first heat exchange barrel. The first spiral tube and the second spiral tube are connected between the first heat exchange barrel and the second heat exchange barrel. An air inlet pipe is provided at the upper end of the first heat exchange barrel, and a vent pipe is provided between the first heat exchange barrel and the second heat exchange barrel. The outlet of the vent pipe is located in the bottom area inside the second heat exchange barrel, and an air outlet pipe is provided at the upper end of the second heat exchange barrel.

[0005] Furthermore, the first heat exchange tank is equipped with a gas collection hood inside, the outlet of the gas collection hood is located in the bottom area inside the first heat exchange tank, the air inlet pipe is connected to the upper end of the gas collection hood, and the first spiral tube is located outside the gas collection hood.

[0006] Furthermore, a first viewing window is provided on the side of the first heat exchange tank, and a first drain pipe is provided on the side of the first heat exchange tank.

[0007] Furthermore, the vent pipe is equipped with a pressure relief valve, and the pressure relief valve releases pressure from the outside to the inside.

[0008] Furthermore, the bottom side of the vent pipe inside the second heat exchange tank has a grid-like array of notches.

[0009] Furthermore, the top area on the outside of the second heat exchange tank is provided with a first liquid level sensor, a second liquid level sensor, a water supply pipe, and a second drain pipe. The first liquid level sensor and the second liquid level sensor pass through the second heat exchange tank one above the other, and the water supply pipe and the second drain pipe are horizontally arranged below the second liquid level sensor.

[0010] Furthermore, the upper end of the air outlet pipe is provided with a side-opening support platform, and the middle part of the support platform is provided with a round hole. A plug is slidably connected in the round hole, and the lower end of the plug can abut against the upper end of the air outlet pipe.

[0011] Furthermore, a second viewing window is provided on the side of the second heat exchange tank.

[0012] Compared with the prior art, the advantages of this utility model are: the steam in the first heat exchange tank fully exchanges heat with the first spiral tube, the tap water in the second heat exchange tank fully absorbs the heat of the steam, and exchanges heat with the tap water in the second spiral tube to the tap water in the boiler, thereby increasing the tap water temperature in the boiler water tank by about 10°C, reducing energy consumption, saving production costs, and finally the steam temperature drops to a temperature that meets the emission standards before being discharged from the steam outlet pipe. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0015] Figure 2 This is a structural diagram of the back of the present invention;

[0016] Figure 3 This is a schematic diagram of the internal structure of the present invention.

[0017] Figure 4 This is a cross-sectional view of the present invention.

[0018] The components are as follows: 1. First heat exchange tank; 2. Second heat exchange tank; 3. First spiral tube; 4. Second spiral tube; 5. Air inlet pipe; 6. Gas collection hood; 7. Vent pipe; 8. Notch; 9. Air outlet pipe; 10. First drain pipe; 11. Inlet of the first spiral tube; 12. Outlet of the second spiral tube; 13. First viewing window; 14. Second viewing window; 15. Water supply pipe; 16. Second drain pipe; 17. First liquid level sensor; 18. Second liquid level sensor; 19. Pressure relief valve; 20. Support platform; 21. Plug. Detailed Implementation

[0019] To further illustrate the technical means and effects of this utility model in achieving its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] like Figure 1-4 As shown, a heat exchange device before steam discharge includes a first heat exchange tank, a second heat exchange tank, a first spiral tube, and a second spiral tube. The first spiral tube is fixedly connected inside the first heat exchange tank, with its inlet located outside the first heat exchange tank. The second spiral tube is fixedly connected inside the second heat exchange tank, with its outlet located inside the first heat exchange tank. The first and second spiral tubes communicate with each other. An air inlet pipe is provided at the upper end of the first heat exchange tank, and a vent pipe is provided between the first and second heat exchange tanks. The outlet of the vent pipe is located at the bottom region inside the second heat exchange tank, and an air outlet pipe is provided at the upper end of the second heat exchange tank. The first heat exchange tank exchanges heat through air, while the second heat exchange tank contains tap water and exchanges heat through liquid. The spiral tube is used to transport the tap water required by the boiler. Under the action of an external pumping device, steam enters the first heat exchange tank from the inlet pipe. The temperature of the first spiral tube rises in the high-temperature steam environment, and the temperature of the tap water in the first spiral tube also rises, which is equivalent to preheating the tap water. After the steam in the first heat exchange tank fully exchanges heat with the first spiral tube, it enters the second heat exchange tank from the vent pipe. The steam is released at the bottom of the second heat exchange tank, and the tap water in the second heat exchange tank fully absorbs the heat of the steam and exchanges heat with the tap water in the second spiral tube to be transported to the boiler. This increases the temperature of the tap water in the boiler water tank by about 10°C, reduces energy consumption, saves production costs, and finally, the steam temperature drops to a temperature that meets the emission standards before being discharged from the outlet pipe.

[0021] In the above embodiment, a gas collecting hood is provided inside the first heat exchange tank. The outlet of the gas collecting hood is located in the bottom area inside the first heat exchange tank. The inlet pipe is connected to the upper end of the gas collecting hood, and the first spiral tube is located outside the gas collecting hood. The gas collecting hood provides a detour for the steam, making the contact area between the steam and the first spiral tube larger and the heat exchange more complete. A first viewing window and a first drain pipe are provided on the side of the first heat exchange tank. When the steam contacts the first spiral tube, because the first spiral tube continuously supplies cold water, the steam will condense into water droplets after contacting the first spiral tube and drip to the bottom of the first heat exchange tank. At this time, it can be observed through the first viewing window, and the first drain pipe can be opened in time to drain the accumulated water. A pressure relief valve is provided on the vent pipe. The pressure relief valve releases pressure from the outside to the inside to prevent tap water in the second heat exchange tank from flowing back into the first heat exchange tank through the vent pipe under the action of thermal expansion and contraction. The bottom side of the vent pipe inside the second heat exchange tank has a grid-like array of notches, which releases steam along the circumferential direction, disperses the steam and makes it come into more full contact with the tap water in the second heat exchange tank, thereby improving energy utilization.

[0022] In the above embodiment, a first liquid level sensor, a second liquid level sensor, a water supply pipe, and a second drain pipe are provided on the top area of ​​the outer side of the second heat exchange tank. The first and second liquid level sensors pass through the second heat exchange tank one above the other, and the water supply pipe and the second drain pipe are horizontally positioned below the second liquid level sensor. The first and second liquid level sensors are used to detect the liquid level in the second heat exchange tank and control the liquid level in a timely manner through the water supply pipe and the second drain pipe to ensure that the liquid level is stable at a height that completely submerges the second heat exchange tank, while preventing tap water in the second heat exchange tank from spraying out from the vent pipe. The upper end of the vent pipe is provided with a side-opening support platform, and the support platform has a circular hole in the middle. A plug is slidably connected in the circular hole, and the lower end of the plug can abut against the upper end of the vent pipe. The plug seals the vent pipe under the action of gravity, and automatically pushes the plug open when steam is discharged, which is convenient and practical. A second viewing window is provided on the side of the second heat exchange tank, which allows observation of the liquid level and turbidity of the tap water in the second heat exchange tank, making it easy to determine the replacement cycle of the tap water in the second heat exchange tank.

[0023] Description of the working principle of this utility model:

[0024] Steam from the process unit enters the first heat exchange tank through the inlet pipe. Guided by the hood, the steam rises and fully contacts the first spiral tube inside the tank, preheating both the tube and the water it carries. Water droplets generated during this process are promptly discharged through the first drain pipe. After this first stage of heat exchange, the steam enters the second heat exchange tank through the vent pipe and is evenly released at the bottom, allowing the water to fully absorb the heat. This heat is then transferred to the water carried by the second spiral tube, raising the temperature of the water supplied to the boiler by approximately 10°C. Simultaneously, the steam entering through the inlet pipe (70-80°C) cools to 40-50°C after passing through this unit, meeting emission standards. With a total tonnage of nearly 40 tons and an annual steam supply of approximately 100,000 tons, this unit reduces energy consumption by 1 Nm³. 3 / t, saving 350,000 yuan in costs per year.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat exchange device before steam discharge, comprising a first heat exchange tank, a second heat exchange tank, a first spiral tube, and a second spiral tube, characterized in that: The first spiral tube is fixedly connected inside the first heat exchange tank, and the inlet of the first spiral tube is located outside the first heat exchange tank. The second spiral tube is fixedly connected inside the second heat exchange tank, and the outlet of the second spiral tube is located inside the first heat exchange tank. The first spiral tube and the second spiral tube are connected between the first heat exchange tank and the second heat exchange tank. An air inlet pipe is provided at the upper end of the first heat exchange tank, and a vent pipe is provided between the first heat exchange tank and the second heat exchange tank. The outlet of the vent pipe is located in the bottom area inside the second heat exchange tank, and an air outlet pipe is provided at the upper end of the second heat exchange tank.

2. The heat exchange device before steam discharge according to claim 1, characterized in that: The first heat exchange tank is equipped with a gas collection hood. The outlet of the gas collection hood is located in the bottom area inside the first heat exchange tank. The inlet pipe is connected to the upper end of the gas collection hood, and the first spiral tube is located outside the gas collection hood.

3. The heat exchange device before steam discharge according to claim 1, characterized in that: The first heat exchange tank has a first viewing window on its side and a first drain pipe on its side.

4. The heat exchange device before steam discharge according to claim 1, characterized in that: The vent pipe is equipped with a pressure relief valve, and the pressure relief valve releases pressure from the outside to the inside.

5. The heat exchange device before steam discharge according to claim 1, characterized in that: The bottom side of the vent pipe inside the second heat exchange tank has a grid-like array of notches.

6. The heat exchange device before steam discharge according to claim 1, characterized in that: The top area outside the second heat exchange tank is provided with a first liquid level sensor, a second liquid level sensor, a water supply pipe, and a second drain pipe. The first liquid level sensor and the second liquid level sensor pass through the second heat exchange tank one above the other, and the water supply pipe and the second drain pipe are horizontally arranged below the second liquid level sensor.

7. The heat exchange device before steam discharge according to claim 1, characterized in that: The upper end of the air outlet pipe is provided with a side-opening support platform, and the middle of the support platform is provided with a round hole. A plug is slidably connected in the round hole, and the lower end of the plug can abut against the upper end of the air outlet pipe.

8. The heat exchange device before steam discharge according to claim 1, characterized in that: The second heat exchange tank has a second viewing window on its side.

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