Exhaust steam recovery device of deaerator

Abstract

The utility model relates to the technical field of deaerator steam exhaust, and discloses a deaerator steam exhaust recovery device which comprises a shell, an exhaust pipe is arranged at the top end of the shell, and a water conveying pipe and a water drainage pipe are arranged on the side wall of the shell in a communicating mode. A supporting sleeve is coaxially arranged in the shell, and a discharge pipe extending to the outside of the shell is arranged on the supporting sleeve in a communicating mode. A heat conduction pipe is arranged outside the supporting sleeve, the inlet end of the heat conduction pipe extends out of the shell, and the outlet end of the heat conduction pipe is arranged in the supporting sleeve in a penetrating mode. According to the utility model, the exhaust steam of the deaerator can be recycled, the waste of working media and energy is reduced, and the utilization rate of the energy is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of deaerator exhaust steam, in particular to a deaerator exhaust steam recovery device. Background Art

[0002] The deaerator is one of the main equipment in the heat recovery system of a coal-fired power generation unit. Its main function is to remove dissolved oxygen and other insoluble gases in the feed water while heating the feed water, to prevent dissolved oxygen from corroding the boiler feed water system components to generate iron oxide deposits and adhere to the boiler heating surface, thereby reducing the heat transfer effect and operation safety of the heating surface.

[0003] At present, most coal-fired units use thermal deaerators, which discharge oxygen and carry saturated steam. The exhaust steam of the deaerator is generally discharged directly into the atmosphere, causing thermal pollution to the environment, waste of working fluid and heat. Therefore, there is an urgent need for a deaerator exhaust steam recovery device to solve the problem of exhaust steam recovery of the deaerator, thereby reducing the waste of working fluid and energy, improving the energy utilization rate of the unit, and providing favorable conditions for the transformation of coal-fired units to high-efficiency units. Utility Model Content

[0004] The utility model aims to provide a deaerator exhaust steam recovery device, which can recycle the exhaust steam of the deaerator, reduce the waste of working fluid and energy, and thus improve the utilization rate of energy.

[0005] The utility model adopts the following technical solutions:

[0006] A deaerator exhaust steam recovery device comprises a shell, an exhaust pipe is arranged on the top of the shell, and a water pipe and a drain pipe are arranged on the side wall of the shell; a support sleeve is coaxially arranged inside the shell, and a discharge pipe extending to the outside of the shell is arranged on the support sleeve; a heat conduction pipe is arranged outside the support sleeve, the inlet end of the heat conduction pipe extends to the outside of the shell, and the outlet end of the heat conduction pipe is penetrated into the inside of the support sleeve.

[0007] Preferably, a filter screen cylinder is coaxially arranged inside the support sleeve, and the outlet end of the heat conducting pipe extends to the interior of the filter screen cylinder.

[0008] Preferably, the filter screen cylinder is a structure that penetrates from top to bottom, and the bottom end is tightly connected to the inner bottom wall of the support sleeve.

[0009] Preferably, the heat-conducting pipe is a serpentine coil and is spirally coiled along the outside of the supporting sleeve.

[0010] Preferably, a drain pipe extending to the outside of the shell is provided at the bottom of the support sleeve, and a valve is provided on the drain pipe.

[0011] Preferably, a sealing cover is detachably provided on the top of the shell, and the inlet end of the heat-conducting pipe is connected to the input pipe provided on the sealing cover; and the exhaust pipe is provided on the sealing cover.

[0012] Preferably, a wire mesh demister is provided in the support sleeve above the filter screen cylinder.

[0013] Preferably, the water pipe and the drainage pipe are arranged on two symmetrical sides of the shell, wherein the water pipe is arranged on the bottom side of the shell, and the drainage pipe is arranged on the top side of the shell.

[0014] Preferably, the discharge pipe is arranged at the upper middle part of the filter screen cylinder.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model can achieve heat exchange with the water flow input into the shell by arranging a heat-conducting pipe inside the shell, thereby realizing the utilization of the heat of the saturated steam entrained when the deaerator is exhausted, reducing the waste of working fluid and energy, and improving the utilization rate of energy; in addition, the setting of the support sleeve can temporarily store the steam precipitated from the heat-conducting pipe after heat exchange, so that the entrained residual heat can be fully dissipated and finally discharged through the discharge pipe, further improving the utilization of heat and reducing energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0017] Figure 2 It is a cross-sectional view of the housing of the embodiment of the present application;

[0018] Figure 3 This is a schematic diagram of the structure of the support sleeve of an embodiment of the present application;

[0019] Figure 4 This is a schematic diagram of the structure when a wire mesh demister is provided on the support sleeve of an embodiment of the present application. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the present invention in conjunction with the accompanying drawings and embodiments:

[0021] like Figures 1 to 4As shown, a deaerator exhaust steam recovery device described in the utility model includes a shell 1, which is a cylindrical structure. A support leg 2 is arranged at the bottom of the shell 1, and an exhaust pipe 3 is arranged at the top of the shell 1; a water pipe 4 and a drain pipe 5 are arranged on the side wall of the shell 1, wherein the water pipe 4 and the drain pipe 5 are preferably arranged on two symmetrical sides of the shell 1, and the setting height of the water pipe 4 is lower than the setting height of the drain pipe 5, so as to achieve the purpose of water inlet at the bottom and water outlet at the top, prolong the time that the water flow stays in the shell 1 and achieve full contact between the water flow and the heat transfer pipe 6, so as to improve the heat exchange effect.

[0022] A support sleeve 7 is coaxially arranged inside the shell 1, and the outer diameter of the support sleeve 7 is smaller than the inner diameter of the shell 1, and a cavity for water flow is formed between the support sleeve 7 and the shell 1. A discharge pipe 8 extending to the outside of the shell 1 is arranged on the support sleeve 7; a heat pipe 6 is arranged outside the support sleeve 7, and the inlet end of the heat pipe 6 extends outside the shell 1, and the outlet end of the heat pipe 6 is arranged inside the support sleeve 7, so that the heat carried by the water flow precipitated in the heat pipe 6 after the steam condenses can be further utilized, so that the heat generated by the heat pipe 6 can be dissipated to the inside of the shell 1 through the top of the support sleeve 7, thereby reducing energy loss; in this embodiment, a heat insulation layer is arranged inside the support sleeve 7, so that the water flow temporarily stored in the support sleeve 7 releases heat through the space at the top of the support sleeve 7, thereby avoiding the exchange and utilization of the heat in the heat pipe 6 outside the support sleeve 7 again. In addition, the top of the support sleeve 7 is higher than the height of the drain pipe 5, thereby preventing the water flow input into the shell 1 from the outside from entering the support sleeve 7.

[0023] Furthermore, a filter screen cylinder 9 is coaxially arranged in the support sleeve 7, and the outer diameter of the filter screen cylinder 9 is smaller than the inner diameter of the support sleeve 7, so as to form a space for condensed water to flow between the filter screen cylinder 9 and the support sleeve 7, and the outlet end of the discharge pipe 8 is located in the space between the filter screen cylinder 9 and the support sleeve 7; the outlet end of the heat transfer pipe 6 extends to the inside of the filter screen cylinder 9, so that the steam enters the filter screen cylinder 9 for filtration after condensation, and the filtered water flows into the cavity between the filter screen cylinder 9 and the support sleeve 7, and is finally discharged by the discharge pipe 8. The discharge pipe 8 is preferably arranged at the upper middle part of the filter screen cylinder 9 to increase the filtration area, and at the same time prolong the time that the water flow generated by the condensed steam stays in the support sleeve 7, so that the entrained heat can be fully dissipated.

[0024] Among them, the filter screen cylinder 9 is a structure that is through from top to bottom, and its bottom end is tightly connected to the inner bottom wall of the support sleeve 7, so that water flows from the side wall of the filter screen cylinder 9 to the support sleeve 7, and the dirt is trapped inside the filter screen cylinder 9 for temporary storage, waiting for subsequent centralized discharge. In addition, in this embodiment, the heat pipe 6 is a serpentine coil, and is spirally coiled along the outside of the support sleeve 7 to increase the time that the steam stays inside the shell 1 and the contact area with the water flow, thereby achieving sufficient heat exchange.

[0025] Furthermore, a drain pipe 10 extending to the outside of the shell 1 is provided at the bottom of the support sleeve 7, and a valve is provided on the drain pipe 10 for regularly discharging the dirt stored in the filter screen cylinder 9; a sealing cover 11 is detachably provided on the top of the shell 1, and the inlet end of the heat pipe 6 is connected to the input pipe 12 provided on the sealing cover 11; the exhaust pipe 3 is provided on the sealing cover 11. The sealing cover 11 is connected to the shell 1 by bolts, and the setting of the sealing cover 11 facilitates the inspection and maintenance of the inside of the shell 1 to ensure the smooth progress of the work. In addition, a wire mesh demister 13 is also provided in the support sleeve 7 above the filter screen cylinder 9, which is used to remove the mist droplets entrained in the discharged gas to ensure the mass transfer efficiency.

[0026] The utility model transmits the steam generated by the deaerator to the heat pipe 6 through the input pipe 12, and inputs water into the shell 1 at the same time. At this time, heat exchange can be achieved by utilizing the contact between the water flow and the heat pipe 6, so that the heat in the heat pipe 6 can be taken away in time and the heated water flow can be transmitted to the required place; since the steam in the heat pipe 6 still has a certain amount of heat when condensing and precipitating, it can be filtered by inputting it into the filter mesh cylinder 9, and temporarily stored in the space between the filter mesh cylinder 9 and the support sleeve 7, so that the entrained heat can be fully volatilized to the inside of the shell 1, and finally when the condensed water generated by the steam accumulates at the position of the discharge pipe 8, it can be discharged from the discharge pipe 8; the whole equipment has a simple structure and is easy to operate, and can fully utilize the heat of the steam, avoiding the heat loss caused by direct discharge and the adverse effects on the atmosphere.

Claims

1. A deaerator exhaust steam recovery device, characterized in that: It comprises a shell, an exhaust pipe is arranged on the top of the shell, a water pipe and a drainage pipe are arranged on the side wall of the shell; a support sleeve is coaxially arranged inside the shell, a discharge pipe extending to the outside of the shell is arranged on the support sleeve; a heat conduction pipe is arranged outside the support sleeve, the inlet end of the heat conduction pipe extends to the outside of the shell, and the outlet end of the heat conduction pipe is passed through the inside of the support sleeve.

2. The deaerator exhaust steam recovery device according to claim 1, characterized in that: A filter screen cylinder is coaxially arranged inside the support sleeve; the outlet end of the heat conducting pipe extends to the interior of the filter screen cylinder.

3. The deaerator exhaust steam recovery device according to claim 2, characterized in that: The filter screen cylinder is a structure that penetrates from top to bottom, and the bottom end is tightly connected to the inner bottom wall of the support sleeve.

4. The deaerator exhaust steam recovery device according to claim 1, characterized in that: The heat-conducting pipe is a serpentine coil and is spirally coiled along the outside of the supporting sleeve.

5. The deaerator exhaust steam recovery device according to claim 3, characterized in that: The bottom of the support sleeve is provided with a sewage pipe extending to the outside of the shell, and a valve is provided on the sewage pipe.

6. The deaerator exhaust steam recovery device according to claim 1, characterized in that: A sealing cover is detachably provided on the top of the shell, the inlet end of the heat conduction pipe is communicated with the input pipe arranged on the sealing cover; and the exhaust pipe is arranged on the sealing cover.

7. The deaerator exhaust steam recovery device according to claim 2, characterized in that: A wire mesh demister is arranged in the support sleeve above the filter screen cylinder.

8. The deaerator exhaust steam recovery device according to claim 1, characterized in that: The water pipe and the drainage pipe are arranged on two symmetrical sides of the shell, wherein the water pipe is arranged on the bottom side of the shell, and the drainage pipe is arranged on the top side of the shell.

9. The deaerator exhaust steam recovery device according to claim 2, characterized in that: The discharge pipe is arranged at the middle and upper part of the filter screen cylinder.

Images