Coupling type steam-water waste heat recoverer

Abstract

The utility model relates to a coupling type steam-water waste heat recoverer which comprises a shell and a heat exchange pipe arranged in the shell, and is characterized in that the heat exchange pipe is welded with pore plates at two ends of the shell, water chamber end covers are arranged on the outer sides of the pore plates and are separated by water chamber partition plates, a hot side steam-water inlet is formed in one side of the middle of the shell, and a hot side steam-water outlet is formed in the other side of the middle of the shell. The interior of the shell is divided into an upper steam condensation section and a lower hot water cooling section by taking the steam-water inlet as a boundary, the steam condensation section and the hot water cooling section are respectively divided by a flow channel partition plate to form a steam flow channel and a hot water flow channel, and the water chamber end cover is further provided with a cold side water outlet and a cold side water inlet. And the shell is also provided with a hot side water outlet and a steam outlet. The steam-water mixture waste heat recovery device can be used for waste heat recovery of steam-water mixtures, such as waste heat recovery of boiler continuous drainage water, waste heat recovery of drainage water of a steam heating device and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of steam-water heat exchanger, especially a coupled steam-water waste heat recovery device. TECHNICAL BACKGROUND

[0002] At present, for the waste heat recovery of steam-water mixture which is easy to be polluted, steam and water are introduced into two different heat exchangers, namely steam-water heat exchanger and water-water heat exchanger, after steam-water separation, and the waste heat is absorbed by the interwall heat exchange between cold water and steam and between cold water and hot water. Two heat exchangers are operated, and the pipeline and control system are relatively complex, the occupied space is relatively large, and the cost is also relatively high. If a heat exchanger is used to recover the waste heat of steam and hot water without affecting the operation of the drainage device, the waste heat recovery system can be simplified, the reliability of the waste heat recovery system can be improved, and the modification cost of the waste heat recovery can be reduced. SUMMARY

[0003] In order to solve the problem that the waste heat system of steam-water mixture which is easy to be polluted needs double heat exchangers, the system is complex, and the modification cost is high, the utility model provides a coupled steam-water waste heat recovery device, which can absorb steam-water waste heat in a heat exchanger and improve heat utilization efficiency.

[0004] Therefore, the utility model takes the technical scheme that a coupled steam-water waste heat recovery device, including the casing, the heat exchange pipe is arranged in the casing, characterized in that the heat exchange pipe is welded with the hole plate at both ends of the casing, the outer side of the hole plate is the water chamber end cover, the water chamber end cover is separated with the water chamber partition, one side of the middle part of the casing is provided with the hot side steam-water inlet, the casing is divided into the upper steam condensation section and the lower hot water cooling section with the steam-water inlet as the boundary, the steam condensation section and the hot water cooling section are separated with the flow channel partition respectively, and the steam flow channel and the hot water flow channel are formed, the water chamber end cover is also provided with the cold side water outlet and the cold side water inlet, and the casing is also provided with the hot side drainage outlet and the exhaust port.

[0005] The utility model couples two heat exchangers in the same heat exchanger, namely the upper steam-water heat exchanger and the lower water-water heat exchanger, and the heat exchangers at the upper and lower parts are parallel connected at the hot side and are series connected at the cold side. After steam-water mixture enters the heat exchanger, steam enters the upper heat exchanger to condense and exchange heat, and hot water enters the lower heat exchanger to cool and exchange heat. The condensate water of steam drops from the upper part and flows into hot water, finally mixes with hot water to cool, and is discharged from the hot side drainage elbow pipe at the bottom of the heat exchanger, and the excess steam can be discharged from the exhaust port, and the water at the cold side is series connected and countercurrently exchanges heat in the pipes of the upper and lower heat exchangers, passes through the water-water heat exchanger first, then passes through the steam-water heat exchanger, and is discharged from the cold side water outlet after being raised to the temperature close to the steam condensation temperature.

[0006] As preferred, the cold side water outlet is arranged above one side of the hot side steam-water inlet, and the hot side drainage elbow pipe and the cold side water inlet are arranged below the opposite side of the hot side steam-water inlet.

[0007] Preferably, the steam vent is located at the top of the casing.

[0008] Preferably, the hot-side drain bend is an S-shaped overflow pipe.

[0009] Preferably, the orifice plate in the steam channel is wider than the orifice plate in the hot water channel.

[0010] Preferably, the flow channel baffles in the hot water cooling section need to be insulated with polymer materials.

[0011] The beneficial effects of this invention are as follows: It proposes a waste heat recovery device that couples steam condensation and hot water cooling together, preheating the water on the cold side to a higher temperature and fully utilizing the waste heat of the steam-water mixture. This waste heat recovery device has high thermal efficiency, no complex system, good overall integrity, compact structure, and low manufacturing cost. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a cross-sectional view of the present invention.

[0014] In the attached diagram: 1. Water chamber end cap; 2. Orifice plate; 3. Shell; 4. Flow channel baffle; 5. Heat exchange tube; 6. Steam outlet; 7. Water chamber baffle; 8. Hot side drain bend; 9. Cold side water inlet; 10. Hot side steam-water inlet; 11. Cold side water outlet. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] like Figure 1 The coupled steam-water waste heat recovery unit shown includes a water chamber end cover 1, an orifice plate 2, a shell 3, a flow channel baffle 4, a heat exchange tube 5, a steam exhaust port 6, a water chamber baffle 7, a hot-side drain bend 8, a cold-side water inlet 9, a hot-side steam-water inlet 10, and a cold-side water outlet 11.

[0017] Specifically, the heat exchange tube 5 is welded to the orifice plates 2 at both ends. The outside of the orifice plates is a water chamber end cover 1, which is separated by a water chamber partition 7, thus forming a cold-side flow. The steam condensation section at the top and the hot water cooling section at the bottom of the waste heat recovery unit are separated by flow channel partitions 4, forming a steam flow channel and a hot water flow channel.

[0018] Specifically, a hot-side steam-water inlet pipe is installed in the middle of the shell, which passes through the water chamber and is welded to the orifice plate to become the hot-side inlet. A cold-side outlet is installed above one side of the hot-side steam-water inlet, and a hot-side drain bend and a cold-side inlet are installed below the opposite side of the hot-side steam-water inlet.

[0019] Specifically, the top of the waste heat recovery device has a steam exhaust port, and the bottom has a hot water drain pipe.

[0020] Specifically, the orifice plate of the steam section is wider than that of the hot water section to maintain a reasonable steam-water flow rate.

[0021] Specifically, the flow channel partition of the hot water cooling section needs to be insulated with a high polymer material.

[0022] The working process of the utility model is as follows: the steam-water mixture enters the waste heat recovery device, the steam and water are automatically separated, the steam condenses and transfers heat in the steam flow channel at the upper part of the waste heat recovery device, and the excess steam is dissipated through the steam exhaust port at the top. The hot water cools and transfers heat in the hot water flow channel at the lower part of the waste heat recovery device, and the cooled hot water is discharged from the waste heat recovery device through the hot side drain elbow at the bottom. The cold water at the cold side enters the water chamber from the cold side water inlet, exchanges heat with the hot water at the hot side through the heat exchange pipe of the hot water section, is preheated, enters the heat exchange pipe of the steam section, exchanges heat with the steam, and is further heated before being discharged from the waste heat recovery device through the water chamber and the cold side water outlet pipe.

[0023] The utility model can be used for waste heat recovery of steam-water mixture, has high heat utilization efficiency, and is simple and reliable.

[0024] It should be understood that the embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims

1. A coupled steam-water waste heat recovery device, comprising a shell (3), a heat exchange tube (5) is arranged in the shell (3), characterized in that The heat exchange pipe (5) is welded with the hole plate (2) at both ends of the shell (3), the outer side of the hole plate (2) is the water chamber end cover (1), the water chamber end cover (1) is separated by the water chamber partition plate (7), the hot side steam water inlet (10) is arranged on one side of the middle part of the shell (3), the shell is divided into the upper steam condensing section and the lower hot water cooling section by the steam water inlet, the steam condensing section and the hot water cooling section are respectively separated by the flow channel partition plate (4) to form the steam flow channel and the hot water flow channel, the water chamber end cover (1) is further provided with the cold side water outlet (11) and the cold side water inlet (9), and the shell (3) is further provided with the hot side water outlet and the steam outlet (6).

2. The coupled steam and water waste heat recovery according to claim 1, characterized in that The cold side water outlet (11) is arranged above the hot side steam water inlet on one side, and the hot side water outlet elbow pipe (8) and the cold side water inlet (9) are arranged below the hot side steam water inlet (10) on the opposite side.

3. The coupled steam and water heat recovery according to claim 1 or 2, characterized in that The steam outlet (6) is arranged on the top of the shell (3).

4. The coupled steam and water waste heat recovery according to claim 2, characterized in that The hot side water outlet elbow pipe (8) is an S-shaped overflow pipe.

5. The coupled steam and water waste heat recovery according to claim 1, wherein The hole plate (2) at the steam flow channel is wider than the hole plate at the hot water flow channel.

6. The coupled steam and water waste heat recovery according to claim 1, wherein The flow channel partition plate (4) of the hot water cooling section is heat-insulated by high polymer material.

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