Exhaust waste heat recovery device for atmospheric deaerator

Abstract

The utility model discloses an exhaust waste heat recovery device for an atmospheric deaerator. The exhaust waste heat recovery device comprises the atmospheric deaerator, a deoxidizing head is arranged at one end of the atmospheric deaerator, the end part of the deoxidizing head is connected with an exhaust pipe, and an oxygen exhaust door is arranged on the exhaust pipe; a heat exchanger is arranged on one side of the exhaust pipe; the other end of the heat exchanger is connected with a condensation water supplementing assembly, and one end of the condensation water supplementing assembly is connected to the deoxidizing head. The waste heat exchanger is additionally arranged on the exhaust valve pipeline of the atmospheric deaerator, heat exchange is carried out on saturated steam discharged by the exhaust valve and a non-condensed gas mixture, the temperature of make-up water of the deaerator is increased, the exhaust temperature is reduced, meanwhile, condensed water condensed by the heat exchanger is recycled, and the purposes of waste heat utilization and water resource recovery are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat recovery technical field more specifically, relate to a kind of atmospheric deaerator exhaust waste heat recovery device. BACKGROUND

[0002] Deaerator is one of the most important auxiliary equipment in thermal power plant, its main task is to remove the non-condensable gas in boiler feed water, especially oxygen, slow down the corrosion damage of power equipment and pipeline. Deaerator can be divided into three kinds according to pressure grade: atmospheric deaerator, high-pressure deaerator and vacuum deaerator. And atmospheric deaerator is directly discharged to atmosphere by exhaust valve after separating non-condensable gas and high-temperature mixture of steam, causing heat and steam waste.

[0003] In the steam-water separation process of atmospheric deaerator, saturated water containing oxygen qualified is stored in deaerator tank to ensure the safe operation of boiler, and non-condensable gas, especially oxygen, is separated and discharged to atmosphere through exhaust valve. In the discharge process, in addition to 104℃ non-condensable gas being discharged, a large amount of 104℃ saturated steam is also brought out, causing heat and steam waste. SUMMARY

[0004] To solve the above at least one technical problem, the utility model provides a kind of atmospheric deaerator exhaust waste heat recovery device.

[0005] The utility model provides a kind of atmospheric deaerator exhaust waste heat recovery device in the first aspect, including: atmospheric deaerator;

[0006] The deaerator head is provided at one end of the atmospheric deaerator, the exhaust pipe is connected to the end of the deaerator head, and the oxygen exhaust door is provided on the exhaust pipe.

[0007] The heat exchanger is provided on one side of the exhaust pipe, and one end of the heat exchanger is connected to the deaerator head.

[0008] The condensate water makeup assembly is connected to the other end of the heat exchanger, and one end of the condensate water makeup assembly is connected to the deaerator head.

[0009] In a preferred embodiment of the utility model, a plurality of heat exchange pipes are provided inside the heat exchanger, a backwater end is provided at the top of the heat exchanger, a water inlet end is provided at the bottom of the heat exchanger, an air inlet end is provided on one side of the heat exchanger, and an air outlet end is provided on the other side of the heat exchanger.

[0010] In a preferred embodiment of the utility model, the air inlet end and the air outlet end are respectively connected to both ends of the oxygen exhaust door, and the air inlet end is arranged at one end close to the deaerator head.

[0011] In a preferred embodiment of the utility model, the end of the oxygen removal head is provided with a desalted water supplement pipe and a condensate water inlet, and the condensate water inlet is connected to the gas outlet end of the heat exchanger.

[0012] In a preferred embodiment of the utility model, the condensate water supplement assembly comprises a condensate water supplement pipe, the condensate water supplement pipe is divided into two water pipes, the two water pipes are connected in parallel, one of the two water pipes is connected with a first water supplement valve, and the other of the two water pipes is connected with a second water supplement valve.

[0013] In a preferred embodiment of the utility model, the first water supplement valve is connected with a condensate water heating rod at one end, the condensate water heating rod is connected to the water outlet end at one end, and the heating rod and the water outlet end are connected to the condensate water inlet.

[0014] In a preferred embodiment of the utility model, the first water supplement valve is connected to the water inlet end at one end, the water outlet end is connected with a water outlet pipe, and the water outlet pipe is connected with a cooling pool at one end.

[0015] The above technical scheme of the utility model has the following advantages compared with the prior art:

[0016] The application additionally provides a heat exchanger on the exhaust door pipeline of the atmospheric oxygen remover, the saturated steam and the non-condensable gas mixture discharged by the exhaust door are subjected to heat exchange, the temperature of the make-up water of the oxygen remover is increased, the exhaust temperature is reduced, the condensate water condensed by the heat exchanger is recycled, and the purposes of waste heat utilization and water resource recycling are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the specific embodiments of the utility model or the prior art, the drawings needed in the following specific embodiment or prior art description will be briefly introduced, and obviously, some drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0018] Fig. 1 It is the structure block diagram of the exhaust waste heat recovery device of the atmospheric oxygen remover in the embodiment of the utility model;

[0019] Fig. 2 It is the internal structure schematic view of the heat exchanger in the embodiment of the utility model.

[0020] In the drawing: 1, exhaust pipe, 2, oxygen removal door, 3, desalted water supplement pipe, 4, oxygen removal head, 5, atmospheric oxygen remover, 6, condensate water heating rod, 7, condensate water supplement pipe, 8, first water supplement valve, 9, second water supplement valve, 10, water outlet pipe, 11, heat exchanger, 12, backwater end, 13, exhaust end, 14, drainage end, 15, water inlet end, 16, gas inlet end, 17, heat exchange pipe. DETAILED DESCRIPTION

[0021] In order to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first", "second", and the like in the specification of the present application, the claims, and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0023] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0024] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0025] In addition, the terms "mount", "set", "provided with", "connected", "connected", "sleeved" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] Embodiment one

[0028] Referring to Figs. 1-2 As shown in the figure, the utility model discloses an atmospheric deaerator exhaust waste heat recovery device, comprising: atmospheric deaerator 5;

[0029] Atmospheric deaerator 5 one end is provided with deaerator head 4, and the deaerator head 4 end is connected with exhaust pipe 1, and the exhaust pipe 1 is provided with oxygen exhaust door 2;

[0030] One side of exhaust pipe 1 is provided with heat exchanger 11, and one end of heat exchanger 11 is connected to deaerator head 4.

[0031] The other end of heat exchanger 11 is connected with condensate water makeup assembly, and one end of condensate water makeup assembly is connected to deaerator head 4.

[0032] According to the utility model embodiment, a plurality of heat exchange pipes 17 are arranged in heat exchanger 11, a backwater end 12 is arranged at the top of heat exchanger 11, a water inlet end 15 is arranged at the bottom of heat exchanger 11, a gas inlet end 16 is arranged at one side of heat exchanger 11, a gas outlet end 13 is arranged at the other side of heat exchanger 11, a drain end 14 is arranged below gas outlet end 13, and drain end 14 is connected to heat exchanger 11.

[0033] Specifically, the heat exchanger 11 is additionally arranged in the exhaust door pipeline of the atmospheric deaerator 5, a pipeline for leading the condensate water (water temperature 40 DEG C) is connected to the water inlet end 15 of the heat exchanger 11, the water temperature is increased to 60 DEG C after heat exchange with the heat exchanger 11, and the condensate water is supplied into the atmospheric deaerator 5, the temperature of the exhaust gas (104 DEG C) of the atmospheric deaerator 5 is reduced to 60 DEG C after surface heat exchange with the condensate water, and then the exhaust gas is discharged into the atmosphere, the condensed condensate water is led to the boiler cooling pool through the drain pipe for recycling, so that the purposes of waste heat utilization and water resource recovery are achieved, the condensate water in the heat exchanger 11 and the exhaust gas are only subjected to surface heat exchange through the surface heat exchanger 11, and there is no mutual pollution.

[0034] According to the utility model embodiment, the gas inlet end 16 and the gas outlet end are respectively connected to the two ends of the oxygen exhaust door 2, and the gas inlet end 16 is arranged at one end close to the deaerator head 4.

[0035] According to the utility model embodiment, the end of the deaerator head 4 is provided with a desalted water makeup pipe 3 and a condensate water inlet, and the condensate water inlet is connected to the gas outlet end of the heat exchanger 11.

[0036] According to the embodiment of the utility model, condensation water replenishing component includes condensation water replenishing pipe 7, condensation water replenishing pipe 7 is divided into two water pipes, two water pipes are in parallel, one connects first replenishing valve 8, another connects second replenishing valve 9.

[0037] According to the embodiment of the utility model, first replenishing valve 8 one end is connected with condensation water heating rod 6, condensation water heating rod 6 one end is connected to water outlet, and heating rod is connected to condensation water inlet together with water outlet.

[0038] According to the embodiment of the utility model, first replenishing valve 8 one end is connected to water inlet end 15, and water outlet is connected with water outlet pipe 10, and water outlet pipe 10 one end is connected with cooling pool.

[0039] In summary, the application adds waste heat exchanger 11 on the air type deaerator 5 exhaust door pipeline, carries out heat exchange to the saturated steam and non-condensable gas mixture discharged by exhaust door, improves deaerator feed water temperature, reduces exhaust temperature, recycles the condensation water condensed by waste heat exchanger 11, achieves the purpose of waste heat utilization and water resource recovery.

[0040] The technical features of the above embodiments can be combined arbitrarily, and to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0041] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application should not be limited to the above-described embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

[0042] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An atmospheric deaerator exhaust waste heat recovery device, comprising: Atmospheric deaerator, characterized in that, The atmospheric deaerator is provided with a deaeration head at one end, the deaeration head is connected with an exhaust pipe at the end, and the exhaust pipe is provided with an oxygen exhaust door; The exhaust pipe is provided with a heat exchanger at one side, and the heat exchanger is connected to the deaeration head at one end; The heat exchanger is connected with a condensate water supplement assembly at the other end, and the condensate water supplement assembly is connected to the deaeration head at one end.

2. The atmospheric deaerator exhaust heat recovery device according to claim 1, characterized by, The heat exchanger is provided with a plurality of heat exchange pipes inside, a backwater end at the top, a water inlet end at the bottom, an air inlet end at one side, and an air outlet end at the other side.

3. The atmospheric deaerator exhaust heat recovery device according to claim 2, characterized by, The air inlet end and the air outlet end are respectively connected to both ends of the oxygen exhaust door, and the air inlet end is arranged at one end close to the deaeration head.

4. The atmospheric deaerator exhaust heat recovery device according to claim 3, characterized by The end of the deaeration head is provided with a desalted water supplement pipe and a condensate water inlet, and the condensate water inlet is connected to the air outlet end of the heat exchanger.

5. The atmospheric deaerator exhaust heat recovery device according to claim 4, characterized by The condensate water supplement assembly comprises a condensate water supplement pipe, which is divided into two water pipes, and the two water pipes are arranged in parallel, one of which is connected with a first water supplement valve, and the other is connected with a second water supplement valve.

6. The atmospheric deaerator exhaust waste heat recovery device according to claim 5, characterized in that, The first water supplement valve is connected with a condensate water heating rod at one end, the condensate water heating rod is connected to the water outlet end at one end, and the heating rod and the water outlet end are connected to the condensate water inlet together.

7. The atmospheric deaerator exhaust heat recovery device according to claim 6, characterized by The first water supplement valve is connected to the water inlet end at one end, the water outlet end is connected with an outlet pipe, and the outlet pipe is connected with a cooling pool at one end.

Images