A phase change condenser for waste steam recovery

Abstract

This invention provides a phase change condenser for waste steam recovery, relating to the field of phase change condensers. It includes a shell with a waste steam inlet, a waste steam outlet, a cooling water inlet, a cooling water outlet, and a condensate outlet. The waste steam inlet and outlet are connected to the interior of the shell. Inside the shell, several sets of equally spaced, side-by-side heat exchange components are arranged. The upper and lower ends of each heat exchange component are connected to the inner wall of the shell via several connecting rods. Each heat exchange component consists of symmetrically arranged left and right plates, whose edges are fixedly connected to form a cooling water channel. The front and rear ends of the cooling water channel are connected to the cooling water inlet and outlet via pipes. The condensate outlet is located at the bottom of the shell and is connected to the interior of the shell. This invention improves heat exchange efficiency, reduces energy consumption and cost, and achieves effective recovery and utilization of waste steam by optimizing the heat exchange structure.

Description

Technical Field

[0001] This utility model relates to the field of phase change condensers, and in particular to a phase change condenser for waste steam recovery. Background Technology

[0002] In boiler system operation, exhaust steam, as a low-pressure vented steam, is widely present in equipment such as deaerators, stator blowers, and continuous blower outlets. Because exhaust steam contains a certain amount of non-condensable gases, the saturation temperature decreases, leading to a reduction in condensation heat exchange efficiency. As the proportion of non-condensable gases increases, these gases and condensed water droplets further hinder steam condensation, making exhaust steam recovery and utilization difficult.

[0003] Currently, there are various waste steam recovery technologies on the market, mainly including power-type waste steam recovery technology, spray-type heat exchange waste steam recovery technology and shell-and-tube surface heat exchange waste steam recovery technology.

[0004] Dynamic waste steam recovery technology utilizes pressurized steam or water in the system as a driving force, drawing in waste steam through a negative pressure created by a fluid jet, achieving direct heat and mass transfer with the jet medium. The advantages of this technology are its simple structure and its independence from non-condensable gases; however, its disadvantages include the need to consume the kinetic energy of high-grade steam or demineralized water, and the need to pressurize the generated low-pressure steam and low-temperature hot water before returning them to the waste heat recovery system, which increases energy consumption and cost.

[0005] Spray-type heat exchange waste steam recovery technology uses spray-applied demineralized water or a swirl film method to directly transfer heat and mass between waste steam and a cold medium. The condensate is then separated from non-condensable gases by a steam-water separator. Spray heat exchange offers rapid heat and mass transfer, lightweight equipment, and a simple structure, making it suitable for systems with low and stable waste steam flow rates. However, when waste steam fluctuations are significant, water can accumulate at the top of the recovery unit, resulting in a large flow rate and high temperature of hot water. Furthermore, adopting a spray method requires substantial modifications to the existing pumps and piping from the condensate tank to the deaerator, increasing the difficulty and cost of the retrofit.

[0006] Shell-and-tube surface heat exchanger-based waste steam recovery technology utilizes demineralized water and waste steam for low-carbon processing. Surface heat exchange enables the condensation and cooling of waste steam, as well as the separation and emission of non-condensable gases. This technology is safe and stable, with minimal adverse impact on the process, requiring no power equipment or easily damaged or consumable parts, and is expected to have high stability. However, its specific effectiveness in practical applications still needs further verification and optimization.

[0007] Therefore, the research and application of phase change condensers for waste steam recovery is particularly important. Utility Model Content

[0008] This invention addresses the problems and shortcomings of existing waste steam recovery technologies, aiming to provide a more efficient, energy-saving, and stable phase change condenser for waste steam recovery. By optimizing the heat exchange structure, improving heat exchange efficiency, and reducing energy consumption and costs, it achieves effective recovery and utilization of waste steam, providing a more reliable and efficient waste steam recovery solution for boiler operation.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A phase change condenser for waste steam recovery includes a shell with a waste steam inlet, a waste steam outlet, a cooling water inlet, a cooling water outlet, and a condensate outlet. The waste steam inlet and outlet are connected to the interior of the shell. Several sets of heat exchange components are arranged side by side at equal intervals inside the shell. The upper and lower ends of the heat exchange components are connected to the inner wall of the shell through several connecting rods. The heat exchange components are composed of symmetrically arranged left and right plates. The edges of the left and right plates are fixedly connected to form a cooling water channel. The front and rear ends of the cooling water channel are connected to the cooling water inlet and cooling water outlet through pipes. The condensate outlet is located at the bottom of the shell and is connected to the interior of the shell.

[0011] Furthermore, the shell has a cylindrical structure.

[0012] Furthermore, both the left and right plates are disc-shaped structures with outwardly curved edges.

[0013] In a preferred embodiment of this utility model, the exhaust steam inlet is horizontally disposed at the bottom of the shell, the exhaust steam outlet is vertically disposed at the top of the shell, the cooling water inlet is horizontally disposed on the rear side of the shell, and the cooling water outlet is horizontally disposed on the front side of the shell.

[0014] In another preferred embodiment of this utility model, the exhaust steam inlet is horizontally disposed on the left side of the housing, the exhaust steam outlet is vertically disposed on the top of the housing, the cooling water inlet is horizontally disposed on the rear side of the housing, and the cooling water outlet is horizontally disposed on the front side of the housing.

[0015] Preferably, a waste steam baffle is provided between the end of the waste steam inlet and the upper end of the leftmost heat exchange component.

[0016] Due to the adoption of the above technical solution, the beneficial technical effects of this utility model are as follows:

[0017] 1. The phase change condenser of this utility model improves heat exchange efficiency, reduces energy consumption and cost by optimizing the heat exchange structure, and achieves more efficient, energy-saving and stable recovery and utilization of exhaust steam, providing a more reliable and efficient exhaust steam recovery solution for boiler system operation.

[0018] 2. The left and right plates of this utility model are both disc-shaped with outward-curving edges. The heat exchange components formed make the thermal stress distribution more uniform, which not only ensures efficient heat exchange, but also effectively reduces the resistance when the fluid passes through, effectively avoids the occurrence of pressure buildup, and improves the phase change condenser's tolerance to thermal shock.

[0019] 3. This utility model has independent condensate and non-condensable gas outlets, which ensures that condensate can be discharged smoothly and avoids the impact of non-condensable gas on the performance of the boiler system.

[0020] 4. The phase change condenser of this utility model can be directly installed at the heat source outlet without complicated installation steps, which greatly simplifies the construction process of the boiler system; at the same time, the compact structural design also saves space.

[0021] 5. The phase change condenser of this utility model does not require gaskets, which not only simplifies the structure but also achieves zero maintenance, reducing the user's operation and maintenance costs. Attached Figure Description

[0022] Figure 1 This is a front view of a phase change condenser for waste steam recovery according to Example 1;

[0023] Figure 2 This is a left view of a phase change condenser for waste steam recovery according to Example 1;

[0024] Figure 3 This is a main sectional view of a phase change condenser for waste steam recovery according to Example 1;

[0025] Figure 4 This is a front view of a phase change condenser for waste steam recovery according to Example 2;

[0026] Figure 5 This is a left view of a phase change condenser for waste steam recovery according to Example 2;

[0027] Figure 6 This is a main sectional view of a phase change condenser for waste steam recovery according to Example 2;

[0028] Reference numerals: 1-shell, 2-exhaust steam inlet, 3-exhaust steam outlet, 4-cooling water inlet, 5-cooling water outlet, 6-condensate outlet, 7-left plate, 8-right plate, 9-exhaust steam baffle. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the following describes this utility model in further detail through preferred embodiments.

[0030] Example 1

[0031] Please see the appendix Figure 1-3 As shown in the figure, this embodiment provides a phase change condenser for waste steam recovery, including a shell 1. The shell 1 is provided with a waste steam inlet 2, a waste steam outlet 3, a cooling water inlet 4, a cooling water outlet 5, and a condensate outlet 6. The waste steam inlet 2 and the waste steam outlet 3 are connected to the interior of the shell 1. The shell 1 is provided with several sets of heat exchange components arranged side by side at equal intervals. The upper and lower ends of the heat exchange components are respectively connected to the inner wall of the shell 1 through several connecting rods. The heat exchange components are composed of symmetrically arranged left plates 7 and right plates 8. The edges of the left plates 7 and right plates 8 are fixedly connected to form a cooling water channel. The front and rear ends of the cooling water channel are respectively connected to the cooling water inlet 4 and the cooling water outlet 5 through pipes. The condensate outlet 6 is located at the bottom of the shell 1 and is connected to the interior of the shell 1.

[0032] In this embodiment, the housing 1 is a cylindrical structure, and the left plate 7 and the right plate 8 are both disc-shaped structures with outwardly curved edges; the exhaust steam inlet 2 is horizontally arranged at the bottom of the housing 1, the exhaust steam outlet 3 is vertically arranged at the top of the housing 1, the cooling water inlet 4 is horizontally arranged on the rear side of the housing 1, and the cooling water outlet 5 is horizontally arranged on the front side of the housing 1.

[0033] In this embodiment, the two sides of the heat exchange component are the exhaust steam flow space. The exhaust steam enters the interior of the shell 1 from the bottom of the shell 1, and then flows upward from the bottom of the shell 1 along the gap between the plates. Finally, the non-condensable gas is discharged from the exhaust steam outlet 3, and the condensate is discharged from the lower condensate outlet 6.

[0034] Example 2

[0035] Please see the appendix Figure 1-3 As shown in the figure, this embodiment provides a phase change condenser for waste steam recovery, including a shell 1. The shell 1 is provided with a waste steam inlet 2, a waste steam outlet 3, a cooling water inlet 4, a cooling water outlet 5, and a condensate outlet 6. The waste steam inlet 2 and the waste steam outlet 3 are connected to the interior of the shell 1. The shell 1 is provided with several sets of heat exchange components arranged side by side at equal intervals. The upper and lower ends of the heat exchange components are respectively connected to the inner wall of the shell 1 through several connecting rods. The heat exchange components are composed of symmetrically arranged left plates 7 and right plates 8. The edges of the left plates 7 and right plates 8 are fixedly connected to form a cooling water channel. The front and rear ends of the cooling water channel are respectively connected to the cooling water inlet 4 and the cooling water outlet 5 through pipes. The condensate outlet 6 is located at the bottom of the shell 1 and is connected to the interior of the shell 1.

[0036] In this embodiment, the shell 1 is a cylindrical structure, and the left plate 7 and the right plate 8 are both disc-shaped structures with outwardly curved edges; the exhaust steam inlet 2 is horizontally arranged on the left side of the shell 1, the exhaust steam outlet 3 is vertically arranged on the top of the shell 1, the cooling water inlet 4 is horizontally arranged on the rear side of the shell 1, and the cooling water outlet 5 is horizontally arranged on the front side of the shell 1; an exhaust steam baffle 9 is provided between the end of the exhaust steam inlet 2 and the upper end of the leftmost heat exchange component.

[0037] In this embodiment, the two sides of the heat exchange component are the exhaust steam flow space. The exhaust steam enters the interior of the shell 1 from the bottom of the shell 1, and then flows upward from the bottom of the shell 1 along the gap between the plates. Finally, the non-condensable gas is discharged from the exhaust steam outlet 3, and the condensate is discharged from the lower condensate outlet 6.

[0038] In this embodiment, the two sides of the heat exchange component are the exhaust steam flow space. The exhaust steam enters the interior of the shell 1 horizontally from the exhaust steam inlet 2. Under the guidance of the exhaust steam baffle 9, it flows horizontally to the right and upward from the bottom of the shell 1, and finally exits from the exhaust steam outlet 3.

[0039] In practical applications, the phase change condenser of this invention can be customized in size for connecting the exhaust steam inlet 2 and exhaust steam outlet 3 to meet the needs of different operating conditions. This can change the steam flow rate, further reduce resistance, effectively prevent pressure buildup, and ensure the stability of the condensation process.

[0040] The above description is a preferred embodiment of the present utility model, used to explain the technical solution of the present utility model. Those skilled in the art can also make conventional modifications, equivalent substitutions and improvements within the spirit and principles of the present utility model.

Claims

1. A phase change condenser for steam recovery, characterized by: The shell is provided with a steam inlet, a steam outlet, a cooling water inlet, a cooling water outlet and a condensed water outlet, the steam inlet and the steam outlet are communicated with the inside of the shell, a plurality of groups of heat exchange assemblies are arranged in the shell, the upper end and the lower end of the heat exchange assembly are connected with the inner wall of the shell through a plurality of connecting rods, the heat exchange assembly is composed of a left plate and a right plate, the left plate and the right plate are fixedly connected at the edges to form a cooling water channel, the front end and the rear end of the cooling water channel are communicated with the cooling water inlet and the cooling water outlet through pipelines respectively, the condensed water outlet is located at the bottom of the shell and is communicated with the inside of the shell.

2. A phase change condenser for waste heat recovery according to claim 1, characterized in that: The shell is in a cylindrical structure.

3. A phase change condenser for waste heat recovery according to claim 1, wherein: The left plate and the right plate are both disc-shaped structures with edges outwardly curved.

4. A phase change condenser for waste heat recovery according to claim 3, wherein: The steam inlet is horizontally arranged at the bottom of the shell, the steam outlet is vertically arranged at the top of the shell, the cooling water inlet is horizontally arranged on the rear side of the shell, and the cooling water outlet is horizontally arranged on the front side of the shell.

5. A phase change condenser for waste heat recovery according to claim 3, wherein: The steam inlet is horizontally arranged at the left side of the shell, the steam outlet is vertically arranged at the top of the shell, the cooling water inlet is horizontally arranged on the rear side of the shell, and the cooling water outlet is horizontally arranged on the front side of the shell.

6. A phase change condenser for waste heat recovery according to claim 5, characterized in that: A steam baffle is arranged between the end of the steam inlet and the upper end of the leftmost heat exchange assembly.

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