Energy-saving transformation structure of fire water tank

Abstract

The utility model relates to an energy-saving transformation structure of a fire water tank, which is applied to transformation of the fire water tank of a thermal power plant, the thermal power plant comprises a coal-fired boiler, the energy-saving transformation structure of the fire water tank comprises a bag-type dust collector, an induced draft fan and a heating air inlet pipe, and the bag-type dust collector is connected with an output end at the top of an ash silo. The induced draft fan is connected with the air outlet end of the bag-type dust collector through an air outlet pipe, an air inlet valve is arranged on the air outlet pipe and communicated with a heating air inlet pipe, and the heating air inlet pipe is arranged in the fire water tank and externally connected with a heating exhaust pipe. According to the utility model, dust in flue gas is filtered by high-gasification wind in the ash silo through the bag-type dust collector, the filtered flue gas with heat is guided into the heating gas inlet pipe, and water in the fire-fighting water tank can be effectively heated through the heating gas inlet pipe, so that the problem that the use of the fire-fighting water tank is influenced due to freezing of the fire-fighting water tank is solved, and meanwhile, the fire-fighting water tank is effectively protected. The fire-fighting water tank is heated by waste heat of high-gasified air in the ash silo, so that the energy consumption is low.

Description

Technical Field

[0001] The utility model relates to the technical field of fire water tank reconstruction in thermal power plants, and more specifically to an energy-saving reconstruction structure of a fire water tank. Background Art

[0002] In order to ensure the fire safety of the plant area, thermal power plants usually install fire water tanks in the coal-fired boiler workshop. The fire water tanks of coal-fired boilers are generally arranged outdoors or underground. When the ambient temperature is below zero degrees, the fire water in the tank will freeze, affecting the safe and stable operation of the fire protection system.

[0003] The existing solution is to add an insulation layer to the outer wall of the water tank, install a circulating water pump to keep the fire water in the water tank flowing, and install a heating device to heat the fire water tank. All of these require special equipment and have high operating energy consumption and costs.

[0004] Therefore, it is necessary to propose an energy-saving transformation structure for fire water tanks to reduce energy consumption and improve their antifreeze effect. Utility Model Content

[0005] The utility model provides an energy-saving transformation structure of a fire water tank, so as to solve the problems that the fire water tanks of existing thermal power plants are easy to freeze and have high energy consumption.

[0006] According to one aspect of the utility model, there is provided a modification of a fire water tank applied to a thermal power plant, wherein the thermal power plant comprises a coal-fired boiler, a dust collector connected to the output end of the coal-fired boiler and an ash bin, the ash bin being connected to the output end of the dust collector, the energy-saving modification structure of the fire water tank comprising a bag dust collector, an induced draft fan and a heated air inlet pipe, the bag dust collector being connected to the top output end of the ash bin, the induced draft fan being connected to the air outlet end of the bag dust collector via an air outlet pipe, an air inlet valve being provided on the air outlet pipe and being connected to the heated air inlet pipe, the heated air inlet pipe extending into the fire water tank and being externally connected to a heated exhaust pipe.

[0007] Preferably, based on the above scheme, a temperature sensor is arranged in the water tank, an exhaust pipe is connected to the air outlet pipe, and an exhaust valve is arranged on the exhaust pipe.

[0008] Preferably, based on the above solution, a water inlet and a water outlet are respectively provided on both sides of the water tank.

[0009] Preferably, based on the above scheme, the heating air inlet pipe is close to the water outlet of the fire water tank.

[0010] Preferably, based on the above scheme, a heating tube assembly is provided in the fire water tank, and the heating tube assembly is fence-shaped and is respectively connected to the heating air inlet pipe and the heating exhaust pipe.

[0011] The utility model discloses an energy-saving transformation structure for a fire water tank. The gasified air in the ash bin passes through a bag dust collector to filter dust in the flue gas, and the filtered flue gas with heat is introduced into a heating air inlet pipe. The water in the fire water tank can be effectively heated through the heating air inlet pipe, so as to prevent the fire water tank from freezing and affecting its use. At the same time, the fire water tank is heated by the flue gas waste heat of a coal-fired boiler, and its energy consumption is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0013] Figure 1 It is a structural schematic diagram of the energy-saving transformation structure of the fire water tank of the utility model;

[0014] Figure 2 This is a structural schematic diagram of a fire water tank energy-saving transformation structure according to another embodiment of the utility model;

[0015] Description of Figure Numbers:

[0016] Bag collector 2, induced draft fan 3, exhaust pipe 41, exhaust valve 42, outlet pipe 5, inlet valve 52, heated inlet pipe 51, heated exhaust pipe 52, heating pipe assembly 53, fire water tank 6, temperature sensor 65, water inlet 66, water outlet 67. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0019] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0020] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0021] In the embodiments shown in the drawings, the directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the positions of the components changes, the directions also change accordingly.

[0022] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0024] See also Figure 1 , and combined with Figure 2 As shown, an energy-saving reconstruction structure of a fire water tank 6 of the utility model is applied to the reconstruction of the fire water tank 6 of a thermal power plant. The thermal power plant includes a coal-fired boiler, a dust collector connected to the output end of the coal-fired boiler and an ash bin 1. The ash bin 1 is connected to the output end of the dust collector. The energy-saving reconstruction structure of the fire water tank 6 includes a bag dust collector 2, an induced draft fan 3 and a heated air inlet pipe 51. The bag dust collector 2 is connected to the top output end of the ash bin. The induced draft fan 3 is connected to the air outlet end of the bag dust collector 2 through an air outlet pipe 5. An air inlet valve 52 is provided on the air outlet pipe 5 and is connected to the heating air inlet pipe 51. The heating air inlet pipe 51 extends into the fire water tank 6 and is externally connected to a heating exhaust pipe 52.

[0025] Preferably, a temperature sensor 65 is provided in the water tank of the utility model, an exhaust pipe 41 is connected to the air outlet pipe 5, an exhaust valve 42 is provided on the exhaust pipe 41, and a water inlet 66 and a water outlet 67 are provided on both sides of the water tank.

[0026] The utility model utilizes a coal-fired boiler and needs to set up an ash bin to store the fly ash generated after combustion. In order to prevent the fly ash in the ash bin from cooling and hardening, it is necessary to set up high-temperature gasification air (150°C - 180°C) to continuously gasify and heat the fly ash in the ash bin. The excess gasification air is filtered by the bag dust collector 2 on the top of the ash bin and then discharged into the atmosphere. The temperature of the exhausted gasification air is between 80°C and 100°C. In order to realize the comprehensive utilization of the exhausted gasification air, the utility model uses it as a heat source for the fire water tank 6, and heats the air inlet pipe 51 into the fire water tank 6, so as to prevent the fire water tank 6 from freezing and save energy at the same time.

[0027] In another embodiment of the utility model, an induced draft fan 3 is provided at the exhaust port of the bag filter 2 of the utility model, and the exhausted gasified air is pressurized and transported to the fire water tank 6 through the air intake valve 52 and the heating air intake pipe 51. A heating pipe assembly 53 is provided in the fire water tank 6, and the heating pipe assembly 53 is a fence-like structure. The heating air intake pipe 51 and the heating exhaust pipe 52 are respectively connected to the heating pipe assembly 53 to realize the introduction of pressurized gas into the heating pipe assembly 53, and the water in the fire water tank 6 is heated by heat exchange between the heating pipe assembly 53 and the water in the fire water tank 6.

[0028] The heating air inlet pipe 51 of the utility model is close to the water outlet 67 of the fire water tank 6, ensuring that the temperature near the water outlet 67 is relatively high. The heating exhaust pipe 52 is led out from the water tank, and the outlet is set at the top of the fire water tank 6 or other safe position to discharge the gasified air after heat exchange into the atmosphere.

[0029] The exhaust port of the induced draft fan 3 is connected to an exhaust pipe 41 and an exhaust valve 42, the middle of the exhaust pipe 41 is connected to the heating air intake main pipe, and the end of the exhaust pipe 41 is arranged at a safe position suitable for emptying.

[0030] Specifically, when the temperature in the fire water tank 6 is higher than 5°C, the device is in a dormant state, the air intake valve 52 is closed and the exhaust valve 42 is opened, and the gasification wind is discharged into the atmosphere through the exhaust pipe 41 and the exhaust valve 42. When the temperature in the fire water tank 6 is lower than 5°C, the temperature sensor 65 feedbacks a signal to control the operation of the device, the air intake valve 52 is opened and the exhaust valve 42 is closed, and the gasification wind enters the fire water tank 6 through the heating air intake pipe 51 to heat the fire water. When the fire water temperature reaches 10°C, the temperature sensor 65 feedbacks a signal to control the device to stop running, the air intake valve 52 is closed and the exhaust valve 42 is opened, and the gasification wind is discharged into the atmosphere through the exhaust pipe 41 and the exhaust valve 42.

[0031] The utility model provides an energy-saving transformation structure of a fire water tank 6. The smoke exhausted from the coal-fired boiler passes through a bag filter 2 to filter dust in the smoke, and the filtered smoke with heat is introduced into a heating air inlet pipe 51. The water in the fire water tank 6 can be effectively heated by the heating air inlet pipe 51, so as to prevent the fire water tank 6 from freezing and affecting its use. At the same time, the heating of the fire water tank 6 adopts the waste heat of the smoke from the coal-fired boiler, and its energy consumption is low.

[0032] Finally, the method of this application is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A fire water tank energy-saving transformation structure, applied to the transformation of fire water tanks in thermal power plants, the thermal power plants comprising coal-fired boilers, dust collectors connected to the output end of the coal-fired boilers and ash silos, the ash silos being connected to the output end of the dust collectors, characterized in that: The energy-saving transformation structure of the fire water tank includes a bag dust collector, an induced draft fan and a heated air inlet pipe. The bag dust collector is connected to the output end of the top of the ash bin, and the induced draft fan is connected to the air outlet end of the bag dust collector through an air outlet pipe. An air inlet valve is provided on the air outlet pipe and is connected to the heated air inlet pipe. The heated air inlet pipe extends into the fire water tank and is externally connected to a heated exhaust pipe.

2. A fire water tank energy-saving transformation structure as claimed in claim 1, characterized in that: A temperature sensor is arranged in the water tank, an exhaust pipe is connected to the air outlet pipe, and an exhaust valve is arranged on the exhaust pipe.

3. The energy-saving transformation structure of a fire water tank according to claim 1, characterized in that: A water inlet and a water outlet are respectively arranged on both sides of the water tank.

4. A fire water tank energy-saving transformation structure as claimed in claim 3, characterized in that: The heating air inlet pipe is close to the water outlet of the fire water tank.

5. The energy-saving transformation structure of a fire water tank as claimed in claim 3, characterized in that: A heating pipe assembly is arranged in the fire water tank. The heating pipe assembly is in a fence shape and is connected to the heating air inlet pipe and the heating exhaust pipe respectively.

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