Energy-saving device of steam boiler

Abstract

The utility model provides a steam boiler energy-saving device which comprises a boiler body, a heating device is installed in the boiler body, a rear smoke box is installed at the end, away from a combustion device, of the boiler body, a preheating device is connected to the boiler body, a gas conveying pipe is installed on the rear smoke box, and the preheating device is connected to the preheating device. The rear smoke box is connected with the preheating device through a gas conveying pipe; the preheating device comprises a preheating box and a preheating pipe, an air pump is installed on the preheating box, the air inlet end of the preheating pipe is connected with the air outlet end of the air pump, the air outlet end of the air conveying pipe is connected with the air inlet end of the air pump, and the air outlet end of the preheating pipe penetrates through the preheating box and extends out of the preheating box; a water pump is mounted on the preheating box; the steam boiler can solve the problems that in the prior art, a steam boiler can generate smoke with the high temperature in the operation process, the smoke carries a large amount of heat and is lost and not utilized, the heat efficiency of the steam boiler is low, and energy is wasted.

Description

Technical Field

[0001] The utility model relates to the field of boilers, in particular to an energy-saving device for a steam boiler. Background Art

[0002] A steam boiler refers to a device that can generate steam. It usually includes an oil-fired steam boiler, a gas-fired steam boiler, an electric steam boiler, etc. Heat is provided through oil, gas or electricity to heat the water in the steam boiler to generate usable steam.

[0003] However, during the use of the existing steam boilers, a large amount of scale will be generated on the inner wall of the boiler. If the scale is not cleaned, the heat generation efficiency of the boiler will be reduced. To solve the problems existing in the prior art, the utility model with the publication number of CN220750104U discloses a stain cleaning device for a steam boiler (hereinafter referred to as the prior art 1), which includes a furnace body. The middle of the top of the inner wall of the furnace body is rotatably connected with a hollow rotating shaft. A plurality of liquid spraying pipes arranged at equal intervals up and down are provided at the front end of the outer wall of the hollow rotating shaft. A cleaning component is provided at the rear end of the outer wall of the hollow rotating shaft. The cleaning component includes three connecting cross bars arranged at equal intervals up and down. The outer ends of the three connecting cross bars are all movably connected with movable rods. The outer ends of the three movable rods are jointly connected with a first strip-shaped plate. A first scraping plate is provided on the outer side of the first strip-shaped plate. Two second strip-shaped plates arranged symmetrically left and right are provided at a position close to the bottom end of the outer wall of the hollow rotating shaft. A second scraping plate is provided at the bottom of the second strip-shaped plate. The top end of the hollow rotating shaft penetrates through the top of the inner wall of the furnace body and is provided with a liquid inlet connecting pipe.

[0004] In the prior art 1, the cleaning component can effectively remove the stains on the inner wall of the furnace body. However, during the operation of the steam boiler in the prior art 1, flue gas with a relatively high temperature will be generated. The flue gas carries a large amount of heat and is dissipated without being utilized, which will cause the thermal efficiency of the steam boiler to be low, resulting in energy waste and increased production costs. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an energy-saving device for a steam boiler, which can solve the problem that during the actual use process, the steam boiler in the prior art will generate flue gas with a relatively high temperature during operation, and the flue gas carries a large amount of heat and is dissipated without being utilized, resulting in low thermal efficiency of the steam boiler and energy waste.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is:

[0007] An energy-saving device for a steam boiler, comprising a boiler body, a heating device is installed inside the boiler body, a rear smoke box is installed at one end of the boiler body away from the combustion device, a preheating device is connected to the boiler body, an air delivery pipe is installed on the rear smoke box, and the rear smoke box is connected to the preheating device through the air delivery pipe;

[0008] The preheating device includes a preheating box and preheating pipes. An air pump is installed on the preheating box. The intake end of the preheating pipe is connected to the outlet end of the air pump. The outlet end of the air delivery pipe is connected to the intake end of the air pump. The outlet end of the preheating pipe passes through the preheating box and extends outside the preheating box;

[0009] A water pump is installed on the preheating box. The water pump is used to connect to a liquid source device. An exhaust pipe is connected to the boiler body.

[0010] Preferably, a heat-insulating shell is sleeved on the boiler body, and a heat-insulating cavity is formed between the boiler body and the heat-insulating shell.

[0011] Preferably, heat-insulating cotton is arranged in the heat-insulating cavity.

[0012] Preferably, a filtering component is detachably installed on the rear smoke box. The filtering component is used to filter the flue gas entering the rear smoke box.

[0013] Preferably, the heating device includes a burner and a furnace liner. The furnace liner is installed inside the boiler body. The burner is used to generate high-temperature and high-pressure flames to heat the water inside the boiler body; an intake pipe is connected to one end of the furnace liner away from the burner, and the furnace liner is communicated with the rear smoke box through the intake pipe.

[0014] Preferably, a re-burning box is installed at one end of the furnace liner away from the heater. A front smoke box is arranged at one end of the boiler away from the rear smoke box; a first return pipe is connected to the re-burning box, and the re-burning box is communicated with the front smoke box through the first return pipe; a second return pipe is connected to the front smoke box, and the front smoke box is connected to the rear smoke box through the second return pipe.

[0015] Preferably, a corrugated structure is arranged inside the furnace liner.

[0016] Preferably, the filtering component includes a filter cartridge and a connection cover. The connection cover is detachably connected to the rear smoke box. The filter cartridge is fixedly connected to the connection cover and is used to filter the flue gas entering the rear smoke box.

[0017] Preferably, a liquid level gauge is installed on the boiler body.

[0018] Preferably, heat-conducting fins are fixedly connected to the furnace liner.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] In the present utility model, the heating device is used to heat the liquid entering the boiler body through the liquid inlet pipe, so that the liquid generates steam after heating up, and the generated steam is discharged from the boiler body through the exhaust pipe;

[0021] The water pump installed on the preheating tank can pump the liquid into the preheating tank. When the heating device heats the liquid in the boiler body, high-temperature flue gas will be generated; under the action of the air pump, the flue gas in the rear smoke box enters the preheating pipe through the gas transmission pipe; after the high-temperature gas entering the preheating pipe contacts the liquid in the preheating tank, it can preheat the liquid, so that the waste heat in the flue gas can be fully utilized and energy waste can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 Is a perspective view of the present utility model.

[0024] Figure 2 Is a structural schematic diagram of the present utility model.

[0025] Figure 3 For the present utility model Figure 2 Is a structural schematic diagram of the preheating device in the present utility model.

[0026] In the drawings, the list of components represented by each reference numeral is as follows:

[0027] 101 - Boiler body, 102 - Heating device, 103 - Rear smoke box, 104 - Heat insulation shell, 105 - Preheating device, 106 - Gas transmission pipe, 107 - Liquid level gauge, 108 - Preheating pipe, 109 - Air pump, 110 - Filter assembly, 111 - Burner, 112 - Furnace liner, 113 - Return combustion chamber, 114 - Front smoke box, 115 - First return pipe, 116 - Second return pipe, 117 - Filter cartridge, 118 - Connection cover, 119 - Preheating tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In the following text, only some exemplary embodiments are simply described. As those skilled in the art

[0029] As will be appreciated by those skilled in the art, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present utility model. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0030] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0032] In the embodiments of the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0033] In the embodiments of the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0034] The following disclosure provides many different embodiments or examples for implementing different structures of the embodiments of the present utility model. To simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0035] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0036] See Figures 1 - 3 , this embodiment discloses a steam boiler, specifically a steam boiler energy-saving device, including a boiler body 101, a heating device 102 is installed in the boiler body 101, a rear smoke box 103 is installed at one end of the boiler body 101 away from the combustion device, a preheating device 105 is connected to the boiler body 101, an air duct 106 is installed on the rear smoke box 103, and the rear smoke box 103 is connected to the preheating device 105 through the air duct 106;

[0037] The preheating device (105) includes a preheating box 119 and a preheating pipe 108. An air pump 109 is installed on the preheating box 119. The intake end of the preheating pipe 108 is connected to the outlet end of the air pump 109. The outlet end of the air duct 106 is connected to the intake end of the air pump 109. The outlet end of the preheating pipe 108 extends outside the preheating box 119 through the preheating box 119;

[0038] A water pump is installed on the preheating box 119. The water pump is used to connect to a liquid source device, and an exhaust pipe is connected to the boiler body 101.

[0039] In this embodiment, a liquid inlet pipe for connecting to a liquid source device is connected to the liquid inlet end of the water pump, and the liquid outlet end of the water pump communicates with the preheating tank 119; the exhaust pipe communicates with the boiler body 101 and is used for discharging steam; the heating device 102 is used for heating the liquid entering the boiler body 101 through the liquid inlet pipe, so that the liquid generates steam after heating up, and the generated steam is discharged from the boiler body 101 through the exhaust pipe; when the heating device 102 heats the liquid in the boiler body 101, high-temperature flue gas will be generated. After the flue gas generated in the heating device 102 enters the rear smoke box 103, the air pump 109 is started. Under the action of the air pump 109, the flue gas in the rear smoke box 103 enters the preheating pipe 108 through the gas transmission pipe 106; the high-temperature gas entering the preheating pipe 108 can preheat the liquid after exchanging heat with the liquid in the preheating tank 119, so that the waste heat in the flue gas can be effectively utilized and energy waste can be avoided; switch valves are installed on both the liquid inlet pipe and the exhaust pipe in this embodiment, and a check valve is installed on the gas outlet end of the preheating pipe 108. The check valve is used to prevent impurities and dust in the outside air from entering the preheating pipe 108; the air pump 109 in this embodiment is a conventional high-temperature resistant air pump 109 in the prior art, and its structure and function will not be elaborated one by one here.

[0040] In some embodiments, a heat preservation shell 104 is sleeved on the boiler body 101, and a heat preservation cavity is formed between the boiler body 101 and the heat preservation shell 104. By providing the heat preservation shell 104, the boiler body 101 can be heat-preserved, and the heat dissipated through the surface of the boiler body 101 can be reduced.

[0041] In some embodiments, heat preservation cotton is arranged in the heat preservation cavity. By providing the heat preservation cotton, the heat preservation effect can be further improved.

[0042] In some embodiments, a filtering component 110 is detachably installed on the rear smoke box 103, and the filtering component 110 is used for filtering the flue gas entering the rear smoke box 103. After the filtering component 110 installed in the rear smoke box 103 filters the particulate matter and dust in the high-temperature flue gas, it can avoid the pollution of the outside environment caused by the discharge of the flue gas to the outside of the heat preservation cavity through the air pump 109.

[0043] In some embodiments, the heating device 102 includes a burner 111 and a furnace liner 112. The furnace liner 112 is installed inside the boiler body 101. The burner 111 is used to generate high-temperature and high-pressure flames to heat the water inside the boiler body 101. One end of the furnace liner 112 away from the burner 111 is connected with an intake pipe, and the furnace liner 112 is communicated with the rear smoke box 103 through the intake pipe. In this embodiment, the furnace liner 112 is fixedly connected to the inner wall of the boiler body 101. After the burner 111 heats the furnace liner 112, the heated furnace liner 112 can heat the liquid inside the boiler body 101 to make the liquid generate steam after heating up. The filter plate assembly is used to filter the flue gas discharged into the rear smoke box 103 through the outlet pipe. The burner 111 is a conventional heating device 102 in the prior art, and its structure and principle will not be elaborated one by one here.

[0044] In some embodiments, a recirculation combustion chamber 113 is installed at one end of the furnace liner 112 away from the heater. A front smoke box 114 is provided at one end of the boiler away from the rear smoke box 103. A first return pipe 115 is connected to the recirculation combustion chamber 113, and the recirculation combustion chamber 113 is communicated with the front smoke box 114 through the first return pipe 115. A second return pipe 116 is connected to the front smoke box 114, and the front smoke box 114 is connected to the rear smoke box 103 through the second return pipe 116. After the high-temperature flue gas generated by the heater heating the furnace liner 112 enters the recirculation combustion chamber 113, the first return pipe 115, the front smoke box 114, and the second return pipe 116 in sequence, and then enters the rear smoke box 103 through the second return pipe 116. By extending the moving path of the high-temperature flue gas, the heating time of the high-temperature flue gas on the liquid inside the boiler body 101 is increased, thereby achieving a better heating effect while avoiding waste of energy.

[0045] In some embodiments, a corrugated structure is provided inside the furnace liner 112. By providing the corrugated structure, the heat conduction area of the furnace liner 112 can be increased and the combustion efficiency can be improved.

[0046] In some embodiments, the filter assembly 110 includes a filter cartridge 117 and a connection cover 118. The connection cover 118 is detachably connected to the rear smoke box 103. The filter cartridge 117 is fixedly connected to the connection cover 118 and is used to filter the flue gas entering the rear smoke box 103. The connection cover 118 is detachably connected to the rear smoke box 103 by bolts. After removing the connection cover 118, the filter cartridge 117 can be replaced or the inside of the rear smoke box 103 can be cleaned. An opening is provided at one end of the filter cartridge 117 away from the connection cover 118. After the opening contacts the inner wall of the rear smoke box 103, it is communicated with the outlet end of the second return pipe 116.

[0047] In some embodiments, a liquid level gauge 107 is installed on the boiler body 101. The liquid level gauge 107 is used to detect the liquid level in the boiler body 101 and replenish water into the boiler body 101 through the liquid inlet pipe according to the detection result.

[0048] In some embodiments, heat conducting fins are fixedly connected to the furnace liner 112. By providing the heat conducting fins, the contact area between the furnace liner 112 and the liquid in the boiler body 101 can be further increased, thereby further improving the heating effect and heating efficiency of the furnace liner 112 on the liquid.

[0049] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. It should be noted that any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving device for a steam boiler, comprising a boiler body (101), wherein a heating device (102) is installed inside the boiler body (101), and a rear smoke box (103) is installed at one end of the boiler body (101) away from the combustion device, and it is characterized in that: A preheating device (105) is connected to the boiler body (101), and an air delivery pipe (106) is installed on the rear smoke box (103). The rear smoke box (103) is connected to the preheating device (105) through the air delivery pipe (106). The preheating device (105) includes a preheating box (119) and preheating pipes (108). An air pump (109) is installed on the preheating box (119). The intake end of the preheating pipe (108) is connected to the outlet end of the air pump (109). The outlet end of the air delivery pipe (106) is connected to the intake end of the air pump (109). The outlet end of the preheating pipe (108) passes through the preheating box (119) and extends outside the preheating box (119). A water pump is installed on the preheating box (119). The water pump is used to connect to a liquid source device, and an exhaust pipe is connected to the boiler body (101).

2. The energy-saving device for a steam boiler according to claim 1, characterized in that: A heat preservation shell (104) is sleeved on the boiler body (101), and a heat preservation cavity is formed between the boiler body (101) and the heat preservation shell (104).

3. An energy-saving device for a steam boiler according to claim 2, characterized in that: Heat preservation cotton is arranged in the heat preservation cavity.

4. A steam boiler energy-saving device according to claim 1, characterized in that: A filter assembly (110) is detachably installed on the rear smoke box (103). The filter assembly (110) is used to filter the flue gas entering the rear smoke box (103).

5. The energy-saving device for a steam boiler according to claim 1, wherein: The heating device (102) includes a burner (111) and a furnace liner (112). The furnace liner (112) is installed inside the boiler body (101). The burner (111) is used to generate high-temperature and high-pressure flames to heat the water inside the boiler body (101). One end of the furnace liner (112) far from the burner (111) is connected with an intake pipe, and the furnace liner (112) is communicated with the rear smoke box (103) through the intake pipe.

6. An energy-saving device for a steam boiler according to claim 5, characterized in that: A re-burning box (113) is installed at one end of the furnace liner (112) far from the heater. A front smoke box (114) is arranged at one end of the boiler far from the rear smoke box (103). A first return pipe (115) is connected to the re-burning box (113). The re-burning box (113) is communicated with the front smoke box (114) through the first return pipe (115). A second return pipe (116) is connected to the front smoke box (114). The front smoke box (114) is connected to the rear smoke box (103) through the second return pipe (116).

7. The energy-saving device for a steam boiler according to claim 5, wherein: A corrugated structure is arranged inside the furnace liner (112).

8. An energy-saving device for a steam boiler according to claim 4, characterized in that: The filter assembly (110) includes a filter cartridge (117) and a connection cover (118). The connection cover (118) is detachably connected to the rear smoke box (103). The filter cartridge (117) is fixedly connected to the connection cover (118) and is used to filter the flue gas entering the rear smoke box (103).

9. The energy-saving device for a steam boiler according to claim 1, wherein: A liquid level gauge (107) is installed on the boiler body (101).

10. An energy-saving device for a steam boiler according to claim 5, characterized in that: Heat conducting fins are fixedly connected to the furnace liner (112).

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