Drain water recovery transformation device for water collecting tank of boiler atmospheric flash tank for thermal power plant

Abstract

The invention relates to the technical field of boilers, in particular to a boiler atmosphere flash tank water collecting tank drain water recovery transformation device for a thermal power plant, a main body assembly comprises a water collecting tank, a water drainage part and an auxiliary part, the water drainage part is arranged on the water collecting tank, and the auxiliary part is arranged on the water collecting tank; the expansion assembly comprises an atmosphere type expansion device, a spare part and a separation part, the atmosphere type expansion device is arranged on the water collecting tank, the spare part is arranged on the atmosphere type expansion device, and the separation part is arranged on the atmosphere type expansion device; the recovery assembly comprises a control part, a steam removal part and a heat reduction part, the control part is arranged on the water drainage part, the steam removal part is arranged on the water drainage part, and the heat reduction part is arranged on the water drainage part. The drain water of the water collecting tank of the atmospheric flash tank of the boiler of an adjacent machine is recycled to the local machine for use, the discharge of demineralized water is greatly reduced, and the purpose of saving the cost is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of boilers, in particular to a water drainage recovery and transformation device for a water collecting tank of a boiler atmosphere expansion vessel used in a thermal power plant. Background Art

[0002] At present, the water from the water tank of the #1 / 2 boiler atmospheric expansion tank of our company is drained to the hot well of the exhaust device of the unit for recovery by starting the drain pump when the water quality is qualified, and is discharged to the drainage tank of the unit when the water quality is unqualified. However, when the #1 / 2 unit has a large load deviation, the water level of the hot well of the exhaust device of the low-load unit is too high, and the water from the water tank of the boiler atmospheric expansion tank cannot be recovered to the hot well of the exhaust device, and can only be discharged to the drainage tank of the unit, resulting in serious waste of working fluid. The water level of the hot well of the exhaust device of the high-load unit is too low, and a large amount of desalted water needs to be added to the hot well of the exhaust device, especially when the single unit is running, during the startup of another unit, the water from the water tank of the boiler atmospheric expansion tank is discharged to the drainage tank of the unit, resulting in serious waste of working fluid. Summary of the invention

[0003] In view of the above-mentioned problem that during the single unit operation, during the startup of another unit, the water collection tank of the boiler atmospheric expansion tank is drained to the unit drainage tank, resulting in serious waste of working fluid, the present invention is proposed.

[0004] Therefore, the object of the present invention is to provide a water drain recovery and transformation device for a water collecting tank of a boiler atmospheric expansion vessel used in a thermal power plant.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising:

[0006] The main body assembly includes a water collecting tank, a water discharge component and an auxiliary component, wherein the water discharge component is arranged on the water collecting tank, and the auxiliary component is arranged on the water collecting tank;

[0007] An expansion assembly, comprising an atmospheric expansion container, a spare part and a separation part, wherein the atmospheric expansion container is arranged on the water collecting tank, the spare part is arranged on the atmospheric expansion container, and the separation part is arranged on the atmospheric expansion container; and

[0008] The recovery component includes a control component, a steam removal component and a heat reduction component. The control component is arranged on the water discharge component, the steam removal component is arranged on the water discharge component, and the heat reduction component is arranged on the water discharge component. The control component, the steam removal component and the heat reduction component are arranged in parallel.

[0009] As a preferred solution of the water drain recovery modification device of the water collecting tank of the boiler atmospheric expansion tank for a thermal power plant described in the present invention, the water collecting tank includes a first valve, a second valve and a third valve, and the first valve, the second valve and the third valve are all fixedly connected at different positions of the water collecting tank and are arranged in parallel.

[0010] As a preferred solution of the water drain recovery modification device of the water collecting tank of the boiler atmospheric expansion tank for a thermal power plant described in the present invention, wherein: the drain component includes a first boiler starting drain pump and a second boiler starting drain pump fixedly connected to one side of the second valve, a first pressure-free drain mother pipe, a second pressure-free drain mother pipe and a third pressure-free drain mother pipe fixedly connected to one side of the second boiler starting drain pump, and the first pressure-free drain mother pipe, the second pressure-free drain mother pipe and the third pressure-free drain mother pipe are arranged in parallel.

[0011] As a preferred solution of the water drain recovery modification device of the water collecting tank of the boiler atmospheric expansion tank for a thermal power plant described in the present invention, the auxiliary parts include a cooler and a drainer fixedly connected to one side of the first valve, the cooler and the drainer are arranged in parallel, and a heater is fixedly connected to one side of the third valve.

[0012] As a preferred solution of the water drain recovery modification device of the water collecting tank of the boiler atmospheric expansion tank for a thermal power plant described in the present invention, the atmospheric expansion tank includes a water drain cooler, a second cooling water drain, a first cooling water drain and a condenser fixedly connected thereto, the water drain cooler, the second cooling water drain, the first cooling water drain and the condenser are arranged in parallel, and a pressurized water drain is fixedly connected to one side of the condenser.

[0013] As a preferred solution of the water drain recovery modification device of the water collecting tank of the boiler atmospheric expansion tank for a thermal power plant described in the present invention, the spare parts include a deaerator, a steam turbine door and a spare interface fixedly connected to one side of the atmospheric expansion tank, and the deaerator, the steam turbine door and the spare interface are arranged in parallel.

[0014] As a preferred solution of the water drain recovery and transformation device of the water collecting tank of the boiler atmospheric expansion tank for a thermal power plant described in the present invention, the separation component includes an air-heated drain pump fixedly connected to the other side of the atmospheric expansion tank, and a separator fixedly connected to the upper side of the atmospheric expansion tank.

[0015] As a preferred solution of the water drain recovery and modification device for the water collecting tank of the boiler atmospheric expansion vessel for a thermal power plant described in the present invention, the control component includes a first electric door fixedly connected to one side of the first boiler starting water drain pump, a fourth valve fixedly connected to one side of the first electric door, and a deaerator fixedly connected to one side of the fourth valve.

[0016] As a preferred solution of the water drain recovery modification device of the water collecting tank of the boiler atmospheric expansion tank for a thermal power plant described in the present invention, the desteaming component includes a second electric door fixedly connected to the first boiler starting drain pump, a first regulating door fixedly connected to one side of the second electric door, a first manual door fixedly connected to one side of the first regulating door, and a de-condenser fixedly connected to one side of the first manual door.

[0017] As a preferred solution of the water drain recovery modification device for the water collecting tank of the boiler atmospheric expansion tank for a thermal power plant described in the present invention, the heat reducing component includes a third electric door fixedly connected to the first boiler starting water drain pump, a second regulating door fixedly connected to one side of the third electric door, a second manual door fixedly connected to one side of the second regulating door, and a de-adjacent exhaust fan fixedly connected to one side of the second manual door.

[0018] The beneficial effects of the present invention are as follows: the serious waste of working hours is solved through the interaction between the main component, the expansion component and the recovery component. On the basis of the designed equipment system, a branch is added to the hot well pipeline from the boiler atmospheric expansion tank water collection tank to each exhaust device, and a group of valve groups are arranged, including an electric door in front of the regulating door, a regulating door, and a manual door behind the regulating door. In this way, the water drained from the boiler atmospheric expansion tank water collection tank of the temporary machine can be recovered and used in the machine, which greatly reduces the discharge of desalted water and achieves the purpose of saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0020] Figure 1 The present invention is a schematic diagram of the overall structure of a water drainage recovery and transformation device for a water collecting tank of a boiler atmosphere expansion vessel used in a thermal power plant.

[0021] Figure 2 The present invention is a schematic diagram of the various structural connections of a water collection tank drain recovery modification device for a boiler atmosphere expansion vessel used in a thermal power plant. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0026] Example 1

[0027] Reference Figure 1 - Figure 2 , which is the first embodiment of the present invention, provides a water drain recovery modification device for a water collecting tank of a boiler atmospheric expansion tank used in a thermal power plant. The device includes a main component 100, including a water collecting tank 101, a drain component 102 and an auxiliary component 103. The drain component 102 is arranged on the water collecting tank 101, and the auxiliary component 103 is arranged on the water collecting tank 101.

[0028] Specifically, the water collecting tank 101 includes a first valve 101a, a second valve 101b and a third valve 101c. The first valve 101a, the second valve 101b and the third valve 101c are all fixedly connected to different positions of the water collecting tank 101 and are arranged in parallel.

[0029] Furthermore, the drain component 102 includes a first boiler start-up drain pump 102a and a second boiler start-up drain pump 102b fixedly connected to one side of the second valve 101b, and a first pressure-free drain main pipe 102c, a second pressure-free drain main pipe 102d and a third pressure-free drain main pipe 102e fixedly connected to one side of the second boiler start-up drain pump 102b. The first pressure-free drain main pipe 102c, the second pressure-free drain main pipe 102d and the third pressure-free drain main pipe 102e are arranged in parallel.

[0030] Furthermore, the auxiliary component 103 includes a cooler 103a and a drainer 103b fixedly connected to one side of the first valve 101a, the cooler 103a and the drainer 103b are arranged in parallel, and a heater 103c is fixedly connected to one side of the third valve 101c.

[0031] During operation, first, the first valve 101a, the second valve 101b and the third valve 101c on the water collecting tank 101 are used to control the entry of water flow. Then, when the boiler needs to be started, the first boiler start-up drain pump 102a and the second boiler start-up drain pump 102b on the side of the second valve 101b are opened, so that the water flows through the two pumps and flows into the first pressureless water discharge mother pipe 102c, the second pressureless water discharge mother pipe 102d and the third pressureless water discharge mother pipe 102e respectively. These three mother pipes are arranged in parallel, and one or more of them can be selected for drainage according to actual needs. At the same time, the cooler 103a and the drainer 103b in the auxiliary part 103 also play corresponding roles. The cooler 103a is used to reduce the water temperature, and the drainer 103b is used to discharge excess water. Finally, if the air needs to be heated, the heater 103c on the side of the third valve 101c can be opened. During the whole process, various components work together to ensure the normal operation of the device.

[0032] Example 2

[0033] Reference Figure 1 - Figure 2 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: this device includes an expansion component 200, including an atmospheric expansion container 201, a spare part 202 and a separation part 203, the atmospheric expansion container 201 is arranged on the water collecting tank 101, the spare part 202 is arranged on the atmospheric expansion container 201, and the separation part 203 is arranged on the atmospheric expansion container 201.

[0034] Specifically, the atmospheric expansion tank 201 includes a drain water cooler 201a, a second cooling drain water cooler 201b, a first cooling drain water cooler 201c and a condenser 201d fixedly connected thereto. The drain water cooler 201a, the second cooling drain water cooler 201b, the first cooling drain water cooler 201c and the condenser 201d are arranged in parallel. The drain water cooler 201a is used to drain the feed water pipe, economizer and water-cooled wall. The second cooling drain water cooler 201b is used to drain the reheater and the reheater cooling water. The first cooling drain water cooler 201c is used to drain the superheater and the superheater cooling water. A pressurized water drain 201e is fixedly connected to one side of the condenser 201d.

[0035] Furthermore, the spare part 202 includes a deaerator 202a, a turbine door 202b and a spare interface 202c fixedly connected to one side of the atmospheric expansion tank 201, and the deaerator 202a, the turbine door 202b and the spare interface 202c are arranged in parallel.

[0036] Furthermore, the separator 203 includes an air-heated drain pump 203a fixedly connected to the other side of the atmospheric expansion container 201 and a separator 203b fixedly connected to the upper side of the atmospheric expansion container 201 .

[0037] The remaining structure is the same as that of the embodiment.

[0038] Operation process: First, the water in the water collection tank 101 is expanded through the atmospheric expansion tank 201. During the expansion process, the water flows through the drain water cooler 201a, the second cooling drain 201b, the first cooling drain 201c and the condenser 201d fixedly connected to the atmospheric expansion tank 201. These devices are arranged in parallel to complete the cooling and condensation process of the water. Subsequently, the condensed water is discharged through the pressurized drain 201e; in the spare parts 202, when the system needs to be maintained or parts need to be replaced, the deaerator 202a, the steam turbine door 202b and the spare interface 202c can be enabled. These three are also arranged in parallel for easy operation and maintenance; in the separator 203, the air-heated drain pump 203a is used to transport the treated water to the required place, and the separator 203b is responsible for separating the impurities and air in the water to ensure the purity of the water quality. Throughout the process, each component works together to ensure the normal operation and high efficiency of the device.

[0039] Example 3

[0040] Reference Figure 1 - Figure 2 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: this device includes a recovery component 300, including a control component 301, a desteaming component 02 and a heat reducing component 303. The control component 301 is arranged on the water discharge component 102, the desteaming component 02 is arranged on the water discharge component 102, and the heat reducing component 303 is arranged on the water discharge component 102. The control component 301, the desteaming component 02 and the heat reducing component 303 are arranged in parallel.

[0041] Specifically, the control element 301 includes a first electric door 301a fixedly connected to one side of the first boiler startup drain pump 102a, a fourth valve 301b fixedly connected to one side of the first electric door 301a, and a deaerator 301c fixedly connected to one side of the fourth valve 301b.

[0042] Furthermore, the desteaming component 02 includes a second electric door 302a fixedly connected to the first boiler start-up drain pump 102a, a first regulating door 302b fixedly connected to one side of the second electric door 302a, a first manual door 302c fixedly connected to one side of the first regulating door 302b, and a decondenser 302d fixedly connected to one side of the first manual door 302c.

[0043] Furthermore, the heat reducing component 303 includes a third electric door 303a fixedly connected to the first boiler starting drain pump 102a, a second regulating door 303b fixedly connected to one side of the third electric door 303a, a second manual door 303c fixedly connected to one side of the second regulating door 303b, and a de-adjacent exhaust fan 303d fixedly connected to one side of the second manual door 303c.

[0044] The remaining structure is the same as that of the embodiment.

[0045] Operation steps: First, in the control part 301, the first electric door 301a fixedly connected to one side of the first boiler start drain pump 102a controls the start and stop of the water flow, the fourth valve 301b fixedly connected to one side of the first electric door 301a further adjusts the water flow, and the deaerator 301c fixedly connected to one side of the fourth valve 301b is used to remove oxygen from the water to prevent oxygen corrosion;

[0046] Secondly, the second electric door 302a fixedly connected to the first boiler start-up drain pump 102a controls the discharge of steam, the first regulating door 302b fixedly connected to one side of the second electric door 302a further regulates the steam flow, the first manual door 302c fixedly connected to one side of the first regulating door 302b is used as a manual operation option in standby or emergency situations, and the decondenser 302d fixedly connected to one side of the first manual door 302c is used to condense and recover condensate in the steam;

[0047] Finally, the third electric door 303a fixedly connected to the first boiler start-up drain pump 102a controls the heat transfer, the second regulating door 303b fixedly connected to one side of the third electric door 303a further adjusts the heat transfer efficiency, the second manual door 303c fixedly connected to one side of the second regulating door 303b is also used as a manual operation option in standby or emergency situations, and the exhaust fan 303d fixedly connected to one side of the second manual door 303c is used to remove non-condensable gases in the system; throughout the process, various components work closely together, and through the control of electric doors, regulating doors and manual doors, accurate management of water flow, steam and heat is achieved to ensure safe and efficient operation of the device; to solve this temporary serious waste phenomenon, on the basis of the designed equipment system, a branch is added to the pipeline from the boiler atmospheric expansion tank water tank 101 to the hot well of each exhaust device, and a group of electric doors, regulating doors and manual doors behind the regulating doors of the valve group are set, so that the temporary boiler atmospheric expansion tank water tank 101 can be recovered for use by the machine, which greatly reduces the discharge of desalted water and achieves the purpose of cost saving.

[0048] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values, mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, improvements, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0049] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0050] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A water drainage recovery and transformation device for a water collecting tank of a boiler atmospheric expansion tank used in a thermal power plant, characterized in that: include, The main body component (100) comprises a water collecting tank (101), a water discharge component (102) and an auxiliary component (103), wherein the water discharge component (102) is arranged on the water collecting tank (101), and the auxiliary component (103) is arranged on the water collecting tank (101); An expansion assembly (200) comprises an atmospheric expansion container (201), a spare part (202) and a separation part (203), wherein the atmospheric expansion container (201) is arranged on the water collecting tank (101), the spare part (202) is arranged on the atmospheric expansion container (201), and the separation part (203) is arranged on the atmospheric expansion container (201); and, The recovery component (300) comprises a control component (301), a degassing component (02) and a heat reducing component (303); the control component (301) is arranged on the water discharge component (102); the degassing component (02) is arranged on the water discharge component (102); the heat reducing component (303) is arranged on the water discharge component (102); and the control component (301), the degassing component (02) and the heat reducing component (303) are arranged in parallel.

2. The device for recovering and modifying the water drainage of the water collecting tank of the boiler atmospheric expansion tank for thermal power plants according to claim 1 is characterized by: The water collecting tank (101) comprises a first valve (101a), a second valve (101b) and a third valve (101c); the first valve (101a), the second valve (101b) and the third valve (101c) are all fixedly connected to different positions of the water collecting tank (101) and are arranged in parallel.

3. The device for recovering and modifying the water drainage of the water collecting tank of the boiler atmospheric expansion tank for thermal power plants according to claim 2 is characterized in that: The drain component (102) comprises a first boiler start-up drain pump (102a) and a second boiler start-up drain pump (102b) fixedly connected to one side of the second valve (101b), a first pressureless drain main pipe (102c), a second pressureless drain main pipe (102d) and a third pressureless drain main pipe (102e) fixedly connected to one side of the second boiler start-up drain pump (102b), and the first pressureless drain main pipe (102c), the second pressureless drain main pipe (102d) and the third pressureless drain main pipe (102e) are arranged in parallel.

4. The device for recovering and modifying the water drainage of the water collecting tank of the boiler atmospheric expansion tank for thermal power plants according to claim 3 is characterized by: The auxiliary component (103) comprises a cooler (103a) and a drainer (103b) fixedly connected to one side of the first valve (101a), the cooler (103a) and the drainer (103b) being arranged in parallel, and a heater (103c) is fixedly connected to one side of the third valve (101c).

5. The device for recovering and modifying the water drainage of the water collecting tank of the boiler atmospheric expansion tank for thermal power plants according to claim 3 or 4, characterized in that: The atmospheric expansion tank (201) comprises a drain water cooler (201a), a second cooling drain water trap (201b), a first cooling drain water trap (201c) and a condenser (201d) fixedly connected thereto; the drain water cooler (201a), the second cooling drain water trap (201b), the first cooling drain water trap (201c) and the condenser (201d) are arranged in parallel, and a pressurized water drain (201e) is fixedly connected to one side of the condenser (201d).

6. The device for recovering and modifying the water drainage of the water collecting tank of the boiler atmospheric expansion tank for thermal power plants according to claim 5 is characterized in that: The spare part (202) comprises a deaerator (202a), a turbine door (202b) and a spare interface (202c) fixedly connected to one side of the atmospheric expansion tank (201), and the deaerator (202a), the turbine door (202b) and the spare interface (202c) are arranged in parallel.

7. The device for recovering and modifying the water drainage of the water collecting tank of the boiler atmospheric expansion tank for thermal power plants according to claim 6 is characterized by: The separator (203) comprises an air-heated drain pump (203a) fixedly connected to the other side of the atmospheric expansion container (201), and a separator (203b) fixedly connected to the upper side of the atmospheric expansion container (201).

8. The device for recovering and modifying the water drainage of the water collecting tank of the boiler atmospheric expansion tank for thermal power plants according to claim 6 or 7, characterized in that: The control element (301) comprises a first electric door (301a) fixedly connected to one side of the first boiler start-up drain pump (102a), a fourth valve (301b) fixedly connected to one side of the first electric door (301a), and a deaerator (301c) fixedly connected to one side of the fourth valve (301b).

9. The device for recovering and modifying the water drainage of the water collecting tank of the boiler atmospheric expansion vessel for thermal power plants according to claim 8 is characterized in that: The desteaming component (02) comprises a second electric door (302a) fixedly connected to the first boiler start-up drain pump (102a), a first regulating door (302b) fixedly connected to one side of the second electric door (302a), a first manual door (302c) fixedly connected to one side of the first regulating door (302b), and a decondenser (302d) fixedly connected to one side of the first manual door (302c).

10. The device for recovering and modifying the water drainage of the water collecting tank of the boiler atmospheric expansion vessel for thermal power plants according to claim 9 is characterized in that: The heat reducing component (303) comprises a third electric door (303a) fixedly connected to the first boiler start-up drain pump (102a), a second regulating door (303b) fixedly connected to one side of the third electric door (303a), a second manual door (303c) fixedly connected to one side of the second regulating door (303b), and a de-adjacent exhaust fan (303d) fixedly connected to one side of the second manual door (303c).

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