Energy-saving dehumidification and anti-condensation device system
By using a multi-stage heat exchange and steam-water separation system, the dew point temperature of combustible gases is reduced by using hot coal and chilled water, which solves the problem of condensation formation during long-distance transportation and achieves an energy-saving and environmentally friendly waterless condensation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI SHISHANG ENERGY TECH CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-06-19
AI Technical Summary
During long-distance transport of combustible gases, the pipe wall temperature is lower than the dew point temperature, which leads to condensation and may cause material embrittlement and hydrogen leakage. In addition, existing insulation or heat tracing methods are energy-intensive.
The system employs a combination of a primary heat exchanger and a secondary heat exchanger with a steam-water separator. It uses hot coal and chilled water as refrigerants, and removes moisture from the combustible gas through multi-stage heat exchange and steam-water separation, thereby lowering the dew point temperature and achieving waterless condensation.
It achieves energy-saving, environmentally friendly, safe and reliable long-distance transportation of combustible gases, reduces energy consumption, prevents condensation, and improves transportation safety.
Smart Images
Figure CN224382152U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an energy-saving dehumidification and anti-condensation device system, specifically to a system for long-distance transport of combustible gas at room temperature without water condensation. Background Technology
[0002] Industrial furnaces for silicon steel (such as annealing furnaces and continuous annealing coating units) release hydrogen-containing flammable gases (H2 content can reach 5% to 75%) during high-temperature annealing, and also contain nitrogen (N2), water vapor (H2O), and small amounts of carbon oxides (CO / CO2). The high permeability and flammability and explosiveness of hydrogen (explosion limits 4% to 75%) impose strict requirements on transportation safety.
[0003] The temperature of combustible gas at the furnace outlet is typically 600–800℃. After being cooled to 50–60℃ by a heat exchanger, it may still contain saturated water vapor after initial cooling and drainage. During long-distance transport, if the pipe wall temperature is below the dew point, the water vapor condenses into liquid water. The coexistence of liquid water and hydrogen may promote hydrogen atom penetration into the metal lattice, leading to material embrittlement. If hydrophobic points are installed during transport, there is a risk of hydrogen leakage. In summary, the challenges of long-distance transport include:
[0004] 1. The conveying distance can reach hundreds of meters to several kilometers. The ambient temperature may be much lower than the initial temperature of the combustible gas, causing condensation inside the pipe and requiring drainage.
[0005] 2. Changes in the pressure of combustible gas delivery may cause localized cooling, further increasing the amount of condensate.
[0006] 3. The pipeline needs to be insulated or heated to prevent condensation, resulting in high energy consumption. Utility Model Content
[0007] The technical problem to be solved by this utility model is to overcome the above-mentioned deficiencies of the prior art and provide a system for long-distance transport of combustible gas to prevent condensation and dehumidify.
[0008] The technical problem it aims to solve can be addressed through the following technical solutions.
[0009] An energy-saving dehumidification and anti-condensation device system includes: a primary heat exchanger, a primary steam-water separator, a secondary heat exchanger, and a secondary steam-water separator connected in sequence. The primary heat exchanger is located at the system inlet pipe. The primary steam-water separator is connected to the primary heat exchanger. The system is characterized in that the temperature of the medium gas decreases after passing through the primary heat exchanger, and the condensed water enters the primary steam-water separator and is discharged from it. The secondary heat exchanger is connected to the primary steam-water separator. Furthermore, the temperature of the medium gas continues to decrease after passing through the secondary heat exchanger, and the condensed water enters the secondary steam-water separator and is discharged from it. The secondary steam-water separator is connected to the secondary heat exchanger. This energy-saving dehumidification and anti-condensation device system removes moisture from combustible gases by lowering their dew point temperature, achieving waterless condensation during long-distance transport of combustible gases.
[0010] As a further improvement to this technical solution, the refrigerant in the primary heat exchanger is cooled hot coal, which makes full use of thermal energy.
[0011] As a further improvement to this technical solution, the primary steam-water separator is connected to the primary heat exchanger, which can effectively and promptly discharge the water condensed after the combustible gas has cooled down.
[0012] As a further improvement to this technical solution, the refrigerant in the secondary heat exchanger is chilled water, which can further reduce the dew point temperature of the hot coal combustible gas.
[0013] As a further improvement to this technical solution, the secondary steam-water separator is connected to the secondary heat exchanger, which can effectively and promptly discharge the water condensed after the combustible gas has cooled down.
[0014] As a further improvement to this technical solution, the outlet of the secondary steam-water separator is connected to the refrigerant inlet of the primary heat exchanger, which can effectively recover the heat energy of the combustible gas at the inlet of the hot coal, while also raising its own temperature to a normal temperature before entering the long-distance transmission pipeline for user use.
[0015] The working principle of this utility model is as follows:
[0016] First, the combustible gas enters the primary heat exchanger as hot coal, undergoing initial cooling with the refrigerant (the refrigerant and hot coal are the same medium). As the dew point temperature decreases, a small amount of condensate forms. Then, the combustible gas enters the primary steam-water separator to remove the condensate, bringing the gas to saturation. Next, it enters the secondary heat exchanger as hot coal, where the refrigerant is chilled water. This further reduces the temperature of the combustible gas, again with a small amount of condensate forming as the dew point temperature decreases. The combustible gas then enters the secondary steam-water separator to remove the condensate, bringing the gas to saturation. Finally, the combustible gas enters the primary heat exchanger as refrigerant to exchange heat with the combustible gas that just entered the system.
[0017] An energy-saving dehumidification and anti-condensation device system employing the above technical solution has the following beneficial effects:
[0018] (1) Fully recover heat.
[0019] (2) Energy saving and environmental protection.
[0020] (3) Safe and reliable during production. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of an energy-saving dehumidification and anti-condensation device system according to the present invention. Detailed Implementation
[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.
[0023] like Figure 1 As shown, the present invention provides an energy-saving dehumidification and anti-condensation device system, including a primary heat exchanger 1 and a primary steam-water separator 2. The primary steam-water separator 2 is installed after the primary heat exchanger 1. The combustible gas first passes through the primary heat exchanger 1 and then enters the primary steam-water separator 2. After heat exchange, the combustible gas condenses a small amount of condensate as the temperature decreases. The condensed condensate is discharged to make the combustible gas reach a saturated state.
[0024] In this energy-saving dehumidification and anti-condensation device system, a primary steam-water separator 2, a secondary heat exchanger 3, and a secondary steam-water separator 4 are connected in sequence. Referring to the combustible gas flow indicated by the arrows in the diagram, the combustible gas enters the secondary heat exchanger 3 after passing through the primary steam-water separator 2. In the secondary heat exchanger 3, heat exchange and cooling occur again. At this time, the refrigerant in the secondary heat exchanger 3 is chilled water. After passing through the secondary heat exchanger 3, the combustible gas enters the secondary steam-water separator 4. After heat exchange, the combustible gas condenses with a small amount of condensate as its temperature decreases. The condensed condensate is discharged to saturate the combustible gas.
[0025] In this energy-saving dehumidification and anti-condensation device system, the secondary steam-water separator 4 and the primary heat exchanger 1 are connected, forming a closed loop. Referring to the combustible gas flow indicated by the arrows in the diagram, the combustible gas enters the primary heat exchanger 1 after passing through the secondary steam-water separator 4. After undergoing secondary cooling, the combustible gas then enters the primary heat exchanger 1 as a refrigerant. Through heat exchange, the temperature of the hot coal combustible gas is lowered, while the temperature of the refrigerant combustible gas is raised, thereby achieving the purpose of preventing condensation and dehumidifying during the long-distance transport of the combustible gas.
[0026] This utility model discloses an energy-saving dehumidification and anti-condensation device system that can be applied to various industrial combustible gases, including but not limited to hydrogen-containing combustible gases.
[0027] This utility model provides an energy-saving dehumidification and anti-condensation device system that lowers the dew point temperature of combustible gases, removes the moisture contained in the combustible gases, and enables waterless condensation during long-distance transport of combustible gases. It features energy saving, environmental protection, and safe and reliable operation during production.
[0028] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above-described embodiments. All technical solutions that fall within the principles of this utility model are within its protection scope. For those skilled in the art, any improvements made without departing from the principles of this utility model should also be considered within its protection scope.
Claims
1. An energy-saving dehumidification anti-fogging device system, characterized by, include: A primary heat exchanger (1) is installed at the inlet pipe of the combustible gas; a primary steam-water separator (2) is connected to the primary heat exchanger (1); a secondary heat exchanger (3) is connected to the gas outlet of the primary steam-water separator (2); a secondary steam-water separator (4) is connected to the secondary heat exchanger (3); the gas outlet of the secondary steam-water separator (4) is connected to the refrigerant inlet of the primary heat exchanger (1) to form a closed loop; the heat medium of the primary heat exchanger (1) is the inlet combustible gas, and the refrigerant is the low-temperature combustible gas after being treated by the secondary steam-water separator (4); the refrigerant of the secondary heat exchanger (3) is external chilled water.
2. The energy-saving dehumidification and anti-condensation device system according to claim 1, characterized in that, The first-stage steam-water separator (2) is used to discharge the condensate water that has been cooled by the first-stage heat exchanger (1) in the combustible gas.
3. The energy-saving dehumidification and anti-condensation device system according to claim 1, characterized in that, The secondary heat exchanger (3) is used to further reduce the dew point temperature of the combustible gas, and the secondary steam-water separator (4) is used to discharge the condensate water that has been cooled by the secondary heat exchanger (3).
4. The energy-saving dehumidification and anti-condensation device system according to claim 1, characterized in that, The primary heat exchanger (1) uses cooled combustible gas as a cold source to pre-cool the inlet combustible gas and achieve heat recovery.