Deoxidizing and exhausting energy-saving device of deaerator

Abstract

The utility model discloses a deoxidizing, exhausting and energy-saving device of a deaerator, which belongs to the technical field of boiler thermal deoxidizing, environment-friendly and energy-saving, and comprises a deaerator body, a noise reduction mechanism, a drain tank and a condensation component, the noise reduction mechanism is communicated with the output end of the deaerator body through an oxygen exhausting pipe and is used for silencing and reducing noise when the deaerator body exhausts, and the drain tank is communicated with the condensation component through an oxygen exhausting pipe. The drainage tank is communicated with the bottom end of the noise reduction mechanism through a connecting pipe and used for collecting water condensed by the noise reduction mechanism, and a backflow pipe is arranged between the drainage tank and the deaerator body in a communicated mode. The condition that steam carries water in the deoxidizing process can be relieved, deoxidized gas is discharged, condensate water serves as make-up water and enters the deaerator body again for secondary utilization and recovery, and waste is reduced.

Description

Technical Field

[0001] The utility model relates to the field of boiler thermal deoxidation, environmental protection and energy saving, in particular to an energy-saving system for exhaust steam noise and water recovery in the process of boiler thermal deoxidation. Background Art

[0002] The thermal deaerator of the power plant boiler performs thermal deoxidation by exchanging heat between the exhaust steam with a certain pressure and temperature after the work of the steam turbine and the boiler feed water. The deaerator itself is a mixed heat exchanger. During the process of exhaust steam going upward and feed water going downward, the mixed countercurrent heating is performed for deoxidation. The deaerator is one of the key equipment of the boiler and heating system. If the deaerator has poor deoxidation capacity, it will cause serious corrosion to the boiler feed water pipeline, economizer and other ancillary equipment.

[0003] At present, during the deaerator deoxygenation and exhaust process, the deaerator is filled with gas. When the valve is opened for exhaust, these gases are quickly released to form a large amount of airflow. The flow of this airflow will produce noise and carry water, which not only causes noise pollution but also wastes water resources. For this reason, we propose a deaerator deoxygenation and exhaust energy-saving device to solve the above-mentioned problems. Utility Model Content

[0004] The embodiment of the utility model provides a deaerator deoxidation exhaust energy-saving device to solve the above-mentioned technical problems.

[0005] The embodiment of the utility model adopts the following technical scheme: it includes a deaerator body, a noise reduction mechanism, a drain tank and a condensation assembly. The noise reduction mechanism is connected to the output end of the deaerator body through an exhaust pipe, and is used to reduce noise when the deaerator body is exhausted. The drain tank is connected to the bottom end of the noise reduction mechanism through a connecting pipe, and is used to collect moisture condensed by the noise reduction mechanism. A reflux pipe is provided between the drain tank and the deaerator body. The condensation assembly is arranged on the outside of the noise reduction mechanism, and is used to condense and cool the steam inside the noise reduction mechanism.

[0006] Furthermore, the condensation assembly includes a cooling box and a condensation pipe arranged inside the cooling box, and the condensation pipe is spirally installed outside the noise reduction mechanism.

[0007] Furthermore, the drain tank is provided with a water level controller, the return pipe is provided with a drain pump electrically connected to the water level controller, and the drain pump is opened and closed according to an output signal of the water level controller.

[0008] Furthermore, a deoxygenation valve is provided on the oxygen exhaust pipe.

[0009] Furthermore, the noise reduction mechanism includes a noise reduction box and a plurality of sound baffles located inside the noise reduction box. The plurality of sound baffles are convex downward and are equidistantly arranged along the axial direction of the noise reduction box. A through hole is opened in the middle of the sound baffles.

[0010] Furthermore, an exhaust hole is provided at the upper end of the noise reduction mechanism, and an automatic drain valve is provided on the connecting pipe.

[0011] Furthermore, the inner diameter of the noise reduction box is larger than the inner diameter of the oxygen exhaust pipe.

[0012] At least one of the above technical solutions adopted in the embodiment of the utility model can achieve the following beneficial effects:

[0013] In the utility model, the noise generated when the gas from the deaerator body is discharged is reduced by a noise reduction mechanism, thereby reducing noise pollution; and the steam in the noise reduction mechanism is condensed and cooled by a condensing component, thereby increasing the steam condensation and liquefaction rate and reducing the situation where the steam carries water when the deoxygenated gas is discharged; at the same time, the condensed liquid can be retained in a drain tank and then added to the deaerator body as feed water for secondary utilization, thereby saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a cross-sectional structural diagram of the noise reduction mechanism and the condensing component in the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the sound baffle in the utility model.

[0018] Reference numerals:

[0019] 1. Deaerator body; 11. Discharge pipe; 2. Noise reduction mechanism; 21. Noise reduction box; 22. Sound baffle; 23. Perforation; 24. Exhaust hole; 3. Deoxygenation pipe; 31. Deoxygenation valve; 4. Drain box; 41. Water level controller; 42. Drain pump; 5. Connecting pipe; 51. Automatic drain valve; 6. Reflux pipe; 7. Condensation assembly; 71. Cooling box; 72. Condensation pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] The utility model embodiment provides a deaerator deoxygenation exhaust energy-saving device, including a deaerator body 1, a noise reduction mechanism 2, a drain box 4 and a condensation assembly 7. The noise reduction mechanism 2 is connected to the output end of the deaerator body 1 through an exhaust pipe 3, and is used to mute and reduce noise when the deaerator body 1 is exhausted. The drain box 4 is connected to the bottom end of the noise reduction mechanism 2 through a connecting pipe 5, and is used to collect the moisture condensed by the noise reduction mechanism 2. A reflux pipe 6 is provided between the drain box 4 and the deaerator body 1. When in use, the feed water and the condensed water can enter the deaerator head of the deaerator body 1 through the discharge pipe 11 on the deaerator body 1, and the deaerator body 1 is discharged through the deaerator. The non-condensable gases such as oxygen and carbon dioxide removed by the main body 1 will rise with the steam and be discharged into the noise reduction mechanism 2 through the oxygen exhaust pipe 3 for noise reduction treatment to reduce noise pollution. At the same time, a condensation component 7 is provided on the outside of the noise reduction mechanism 2 to condense and cool the steam inside the noise reduction mechanism 2, thereby increasing the steam condensation rate and reducing the situation where the steam is discharged with water. After the water vapor is condensed into water, it enters the drain tank 4 through the connecting pipe 5 for storage, and can be discharged into the deaerator body 1 through the reflux pipe 6 for use as feed water, thereby reducing the waste of water resources, maintaining the water balance in the deaerator body 1, and helping to improve the stability and operation efficiency of the system.

[0023] The condensation assembly 7 includes a cooling box 71 and a condenser tube 72 arranged inside the cooling box 71. The condenser tube 72 is spirally installed on the outside of the noise reduction mechanism 2. The output end and the input end of the condenser tube 72 are connected to an external refrigeration device (not shown in the figure) to allow the refrigerant medium in the condenser tube 72 to flow continuously. The spiral shape of the condenser tube 72 can increase the contact area with the noise reduction mechanism 2 and improve the cooling and condensing effect. An automatic drain valve 51 is provided on the connecting pipe 5. When the automatic drain valve 51 is opened, the liquid after cooling and condensation flows into the drain tank 4 through the connecting pipe 5 for storage.

[0024] Preferably, a water level controller 41 is provided on the drain tank 4, and a drain pump 42 electrically connected to the water level controller 41 is provided on the reflux pipe 6. The drain pump 42 is opened and closed according to the output signal of the water level controller 41. When the liquid level in the drain tank 4 is high, the drain pump 42 is started by the water level controller 41 to pump water into the deaerator body 1. When the liquid level is low, the drain pump 42 is stopped by the water level controller 41 to pump water. The outlet valve of the drain pump 42 adopts a single-phase check valve to limit the unilateral action of the fluid, so as to realize automatic recovery of the entire system and automatic start and stop of water pumping. It is simpler and does not require manual operation to realize automatic recovery.

[0025] Preferably, a deoxygenation valve 31 is provided on the oxygen exhaust pipe 3. The gas discharged from the deaerator body 1 is processed by the deoxygenation valve 31, and the oxygen content in the gas will be reduced. After subsequent condensation treatment, it can be added to the deaerator body 1 for use as feed water, thereby reducing the corrosive effect of oxygen on the system and improving the performance and life of the system.

[0026] Preferably, the noise reduction mechanism 2 includes a noise reduction box 21 and a plurality of sound baffles 22 located inside the noise reduction box 21. The plurality of sound baffles 22 are all convex downward and are equidistantly arranged along the axial direction of the noise reduction box 21. A through hole 23 is opened in the middle of the sound baffle 22. The inner diameter of the noise reduction box 21 is larger than the inner diameter of the oxygen exhaust pipe 3. After the steam in the oxygen exhaust pipe 3 enters the noise reduction box 21, the exhaust pressure of the gas will be released and reduced after being buffered by the noise reduction box 21 with a larger inner diameter, and the speed of the gas will also be reduced. Thereby, preliminary noise reduction is performed, and the noise reduction box 21 is enclosed into an independent small chamber between the two adjacent sound baffles 22. The noise is then blocked layer by layer by the sound baffles 22 and continuously reflected, thereby gradually reducing the pressure and flow rate of the gas to reduce the noise. An exhaust hole 24 is provided at the upper end of the noise reduction mechanism 2, and part of the gas after noise reduction is discharged through the exhaust hole 24. Since the sound baffles 22 are all convex downward, when the steam in the noise reduction box 21 condenses into liquid, it will fall on the concave surface of the sound baffle 22, and flow through the perforation 23 until it is located at the bottom of the noise reduction box 21, so that it is convenient to be discharged into the drain tank 4 through the connecting pipe 5.

[0027] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A deaerator deoxidation exhaust energy saving device, characterized in that: include; Deaerator body (1); A noise reduction mechanism (2), the noise reduction mechanism (2) being in communication with the output end of the deaerator body (1) via an oxygen exhaust pipe (3) and being used for silencing and reducing noise when the deaerator body (1) is exhausted; A drain box (4), the drain box (4) being connected to the bottom end of the noise reduction mechanism (2) via a connecting pipe (5) and being used for collecting water condensed by the noise reduction mechanism (2), and a return pipe (6) being provided between the drain box (4) and the deaerator body (1); A condensation component (7), wherein the condensation component (7) is arranged outside the noise reduction mechanism (2) and is used to condense and cool the steam inside the noise reduction mechanism (2).

2. A deaerator deoxidation exhaust energy saving device according to claim 1, characterized in that: The condensation assembly (7) comprises a cooling box (71) and a condensation pipe (72) arranged inside the cooling box (71); the condensation pipe (72) is installed in a spiral shape outside the noise reduction mechanism (2).

3. A deaerator deoxidation exhaust energy-saving device according to claim 1, characterized in that: The drain tank (4) is provided with a water level controller (41), and the return pipe (6) is provided with a drain pump (42) electrically connected to the water level controller (41), and the drain pump (42) is turned on and off according to an output signal of the water level controller (41).

4. A deaerator deoxidation exhaust energy saving device according to claim 1, characterized in that: The oxygen exhaust pipe (3) is provided with a deoxygenation valve (31).

5. A deaerator deoxidation exhaust energy-saving device according to claim 1, characterized in that: The noise reduction mechanism (2) comprises a noise reduction box (21) and a plurality of sound baffles (22) located inside the noise reduction box (21); the plurality of sound baffles (22) are all convex downward and are arranged equidistantly along the axial direction of the noise reduction box (21); and a through hole (23) is provided in the middle of the sound baffles (22).

6. A deaerator deoxidation exhaust energy saving device according to claim 1, characterized in that: An exhaust hole (24) is provided at the upper end of the noise reduction mechanism (2), and an automatic drain valve (51) is provided on the connecting pipe (5).

7. A deaerator deoxidation exhaust energy-saving device according to claim 5, characterized in that: The inner diameter of the noise reduction box (21) is greater than the inner diameter of the oxygen exhaust pipe (3).

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