Flooding steam recoverer of deaerator

Abstract

The utility model discloses a waste steam recoverer of a deaerator, and belongs to the technical field of energy conservation and environmental protection. The utility model overcomes the defects of large size, larger occupied space and high manufacturing cost of the traditional exhaust steam recoverer of the deaerator in the prior art. The main structure of the device comprises a shell and a deaerator, an expansion chamber, a vapor-liquid fusion assembly arranged above the expansion chamber and a spraying atomization assembly arranged above the vapor-liquid fusion assembly are arranged in the shell, the expansion chamber is communicated with the interior of the shell through a diffusion hole, and the lower end of the expansion chamber is communicated with the deaerator through a vapor exhaust pipe assembly. The shell is provided with a condensate water outlet pipe communicated with the expansion chamber and a cooling water pipe communicated with the spraying and atomizing assembly. The steam recovery device is mainly used for recovering the steam of the deaerator.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy conservation and environmental protection, and in particular relates to a deaerator steam recovery device. Background Art

[0002] Thermal deaerators are currently widely used in petrochemical and power plant boilers. Due to the performance, structure, and principles of these deaerators, the steam emitted during operation is typically vented. Since deaerators operate continuously year-round, this results in a significant amount of water vapor waste. The water entering the deaerator requires initial chemical treatment, resulting in relatively high costs. Furthermore, the steam released from the deaerator contains a large amount of chemicals, causing pollution to the air and surrounding environment.

[0003] Conventional deaerators usually discharge this steam directly into the atmosphere, which not only wastes valuable thermal energy resources, but also may have adverse effects on the surrounding environment due to the discharge of high-temperature steam. Therefore, existing steam recovery devices generally have the following problems:

[0004] 1. Low energy utilization rate: Existing recovery methods often cannot effectively recover all the steam, resulting in some steam being wasted;

[0005] 2. Complex equipment structure: The design of some steam recovery devices is relatively complex, which increases manufacturing costs and maintenance difficulties;

[0006] 3. Low heat exchange efficiency: Due to the lack of effective means for steam and water to contact, the heat in the steam cannot be completely transferred to the condensate;

[0007] 4. Insufficient safety: There are no effective control measures for excessive steam, which may cause excessive pressure in the system and pose a safety hazard;

[0008] 5. Inconvenient maintenance: Some equipment is inconvenient to disassemble and assemble, making it difficult to conduct regular inspection and maintenance, which affects the service life of the equipment.

[0009] For example, a Chinese utility model patent with authorization announcement number CN 205784667 U discloses a steam recovery mechanism for the venting of a deaerator in a methanol plant boiler. The mechanism can recover steam from the deaerator venting, circulate condensed water to a recovery pool, and significantly reduce venting noise. However, the mechanism has disadvantages in that its heat exchange efficiency is low, energy utilization is not high, and external piping connections are complex and inconvenient. Utility Model Content

[0010] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a deaerator steam recovery device.

[0011] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0012] A deaerator steam recovery device comprises a shell and a deaerator, wherein an expansion chamber, a vapor-liquid fusion component arranged above the expansion chamber, and a spray atomization component arranged above the vapor-liquid fusion component are arranged inside the shell, the expansion chamber is connected with the interior of the shell through a diffusion hole, the lower end of the expansion chamber is connected with the deaerator through an exhaust pipe assembly, and a condensate outlet pipe connected with the expansion chamber and a cooling water pipe connected with the spray atomization component are provided on the shell.

[0013] Preferably, the vapor-liquid fusion assembly includes a lower grid, a vapor-liquid net and an upper grid, and the vapor-liquid net is arranged between the lower grid and the upper grid.

[0014] Preferably, the spray atomization assembly includes a spray ring pipe connected to the cooling water pipe, the spray ring pipe is installed on the inner wall of the shell through a bracket, and one or more water mist nozzles are provided on the spray ring pipe.

[0015] Preferably, the exhaust pipe assembly includes a steam inlet pipe connected to the expansion chamber, an exhaust regulating valve connected to the steam inlet pipe and an exhaust pipe connected to the deaerator, and a flow limiting orifice plate is provided between the exhaust regulating valve and the exhaust pipe to limit the maximum steam output of the deaerator.

[0016] Preferably, the shell includes an upper shell and a lower shell, and the upper shell is detachably connected to the lower shell via a fastening assembly and a gasket.

[0017] Preferably, a vent pipe is provided on the top of the shell.

[0018] Preferably, the shell is mounted on the upper end of the deaerator via supporting legs.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The expansion chamber can effectively collect and utilize the steam discharged from the deaerator, reducing heat loss, and reusing this part of the steam to improve the overall energy efficiency of the system;

[0021] 2. The lower grid, vapor-liquid network and upper grid can promote full contact between steam and liquid, improve heat exchange efficiency and make the cooling water entering the vapor-liquid network more uniform;

[0022] 3. The cooling water can be evenly distributed through the spray ring pipe and the water mist nozzle to form fine water droplets, which increases the contact area between water and steam and enhances the cooling effect. As a result, the steam discharged from the expansion chamber enters the steam-liquid network and is fully cooled and absorbed by the cooling water sprayed by the water mist nozzle;

[0023] 4. The steam output of the deaerator can be accurately controlled through the steam inlet pipe, exhaust regulating valve and flow limiting orifice plate to prevent excessive system pressure or other safety problems caused by excessive steam entering;

[0024] 5. The shell is divided into two parts, upper and lower parts, which are connected by fastening components and gaskets, which is convenient for disassembly and assembly of the equipment and convenient for daily maintenance and inspection;

[0025] 6. The vent pipe at the top is used to discharge the uncondensed absorbed gas when the deaerator encounters special working conditions. This effectively protects the environment by reducing the discharge of steam containing chemical substances in the deaerator.

[0026] 7. Fixing the shell to the upper end of the deaerator with legs not only makes the entire device more stable, but also helps reduce the risk of equipment damage caused by vibration;

[0027] To sum up, the utility model has a compact overall structure, sufficient heat exchange and absorption, low cost, does not occupy ground space separately, can realize self-circulation, saves a lot of water resources and heat energy, and achieves the purpose of environmental protection. In addition to being used for supporting new deaerators, it can also be used for energy-saving and environmentally friendly transformation of deaerators in use, with significant water-saving effects and achieving environmental protection purposes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of the present utility model.

[0029] In the figure: 1. Steam inlet pipe; 2. Condensate outlet pipe; 3. Shell; 4. Expansion chamber; 5. Lower grille; 6. Steam-liquid network; 7. Upper grille; 8. Cooling water pipe; 10. Spray ring pipe; 11. Water mist nozzle; 12. Vent pipe; 13. Bracket; 14. Fastening assembly; 15. Gasket; 16. Exhaust regulating valve; 17. Flow limiting orifice; 18. Exhaust pipe; 19. Support leg; 20. Deaerator. DETAILED DESCRIPTION

[0030] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0031] Example 1:

[0032] like Figure 1 As shown, a deaerator steam recovery device includes a shell 3 and a deaerator 20. The shell 3 is internally provided with an expansion chamber 4, a vapor-liquid fusion assembly disposed above the expansion chamber 4, and a spray atomization assembly disposed above the vapor-liquid fusion assembly. The expansion chamber 4 is connected to the interior of the shell 3 via a diffusion hole. The lower end of the expansion chamber 4 is connected to the deaerator 20 via a steam exhaust pipe assembly. The shell 3 is provided with a condensate outlet pipe 2 connected to the expansion chamber 4 and a cooling water pipe 8 connected to the spray atomization assembly. The diffusion hole is used to throttle and reduce the pressure of high-temperature steam.

[0033] Example 2:

[0034] A deaerator flooding recovery device differs from Example 1 in that the vapor-liquid fusion assembly includes a lower grid 5, a vapor-liquid network 6, and an upper grid 7, with the vapor-liquid network 6 being disposed between the lower grid 5 and the upper grid 7. The lower grid 5, the vapor-liquid network 6, and the upper grid 7 promote sufficient contact between the vapor and the liquid, improve heat exchange efficiency, and ensure more uniform cooling water entering the vapor-liquid network 6.

[0035] Furthermore, the spray atomization assembly includes a spray ring tube 10 connected to the cooling water pipe 8. The spray ring tube 10 is mounted on the inner wall of the housing 3 via a bracket 13, and one or more water mist nozzles 11 are provided on the spray ring tube 10. The spray ring tube 10 is provided in more than one circle, and two adjacent circles of the spray ring tube 10 are staggered. The spray ring tube 10 and the water mist nozzles 11 evenly distribute the cooling water, forming fine droplets, increasing the contact area between water and steam and enhancing the cooling effect. This allows the steam discharged from the expansion chamber 4 to enter the vapor-liquid network 6 and be fully cooled and absorbed by the cooling water sprayed by the water mist nozzles 11.

[0036] Furthermore, the exhaust pipe assembly includes a steam inlet pipe 1 communicating with the expansion chamber 4, an exhaust regulating valve 16 connected to the steam inlet pipe 1, and an exhaust pipe 18 communicating with the deaerator 20. A flow-limiting orifice 17 is provided between the exhaust regulating valve 16 and the exhaust pipe 18 to limit the maximum steam output of the deaerator 20. The steam inlet pipe 1, the exhaust regulating valve 16, and the flow-limiting orifice 17 enable precise control of the steam output of the deaerator 20, preventing excessive system pressure or other safety issues caused by excessive steam ingress.

[0037] Furthermore, the shell 3 includes an upper shell and a lower shell, and the upper shell is detachably connected to the lower shell by a fastening assembly 14 and a gasket 15. The fastening assembly 14 and the gasket 15 realize the sealing fixation of the upper shell and the lower shell. At the same time, the detachable connection facilitates the daily maintenance and inspection of the internal components of the shell 3.

[0038] Furthermore, a vent pipe 12 is provided on the top of the shell 3. The vent pipe 12 provided on the top is used to discharge the uncondensed absorption vapor of the deaerator 20 when special operating conditions occur. Since the discharge of vapor containing chemical substances in the deaerator 20 is reduced, the environment is effectively protected.

[0039] Furthermore, the shell 3 is mounted on the upper end of the deaerator 20 through the support legs 19, and the diameter of the condensed water outlet pipe 2 is larger than the diameter of the cooling water pipe 8 to ensure smooth drainage.

[0040] The working principle of this utility model is:

[0041] During operation, the steam flows from the exhaust pipe 18 above the deaerator 20 through the flow-limiting orifice 17, the exhaust regulating valve 16, and the steam inlet pipe 1 into the expansion chamber 4. The several diffusion holes provided in the expansion chamber 4 realize throttling and pressure reduction of the high-temperature steam. The steam after throttling and pressure reduction is evenly sprinkled onto the steam-liquid network 6 through the cooling water pipe 8, the spray ring pipe 10, and the water mist nozzle 11 in the shell 3. In the steam-liquid network 6, the rising steam and the falling cooling water are fully integrated to form condensed water with a certain temperature, which falls to the bottom of the shell 3, is discharged through the condensed water outlet pipe 2, and flows into the water collection tank through the connecting pipe to achieve the purpose of recycling. The bracket 13 is used to support the spray ring pipe 10. Under special working conditions, a small amount of steam is discharged from the upper vent pipe 12.

Claims

1. A deaerator steam recovery device, comprising a housing (3) and a deaerator (20), characterized in that: The shell (3) is provided with an expansion chamber (4), a vapor-liquid fusion component arranged above the expansion chamber (4), and a spray atomization component arranged above the vapor-liquid fusion component. The expansion chamber (4) is connected to the interior of the shell (3) through a diffusion hole. The lower end of the expansion chamber (4) is connected to the deaerator (20) through an exhaust pipe component. The shell (3) is provided with a condensate outlet pipe (2) connected to the expansion chamber (4) and a cooling water pipe (8) connected to the spray atomization component.

2. The deaerator steam recovery device according to claim 1, characterized in that: The vapor-liquid fusion component comprises a lower grid (5), a vapor-liquid net (6) and an upper grid (7), wherein the vapor-liquid net (6) is arranged between the lower grid (5) and the upper grid (7).

3. The deaerator steam recovery device according to claim 2, characterized in that: The spray atomization assembly comprises a spray ring pipe (10) connected to a cooling water pipe (8); the spray ring pipe (10) is mounted on the inner wall of the housing (3) via a bracket (13); and one or more water mist nozzles (11) are provided on the spray ring pipe (10).

4. The deaerator steam recovery device according to any one of claims 1 to 3, characterized in that: The exhaust pipe assembly comprises a steam inlet pipe (1) communicating with the expansion chamber (4), an exhaust regulating valve (16) connected to the steam inlet pipe (1), and an exhaust pipe (18) communicating with the deaerator (20). A flow limiting orifice plate (17) for limiting the maximum steam output of the deaerator (20) is provided between the exhaust regulating valve (16) and the exhaust pipe (18).

5. The deaerator steam recovery device according to any one of claims 1 to 3, characterized in that: The housing (3) comprises an upper housing and a lower housing, and the upper housing is detachably connected to the lower housing via a fastening assembly (14) and a gasket (15).

6. The deaerator steam recovery device according to any one of claims 1 to 3, characterized in that: A vent pipe (12) is provided on the top of the shell (3).

7. The deaerator steam recovery device according to any one of claims 1 to 3, characterized in that: The shell (3) is mounted on the upper end of the deaerator (20) via supporting legs (19).

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