Automatically-adjusted coal economizer

Abstract

The utility model relates to a self-adjusting coal economizer which is used for a boiler, the boiler comprises a boiler body, and the coal economizer comprises a first collecting box, a second collecting box and a third collecting box, the second header communicates with the water outlet pipe; the first-stage coal economizer is fixed on the furnace body and comprises a plurality of first pipelines which are arranged in parallel; the valve body, the temperature sensor and the pressure sensor are arranged on each first inlet pipe and each first outlet pipe which are arranged in parallel, and whether the first pipeline leaks and is damaged or not is judged by comparing numerical values detected by the temperature sensors and the pressure sensors on the first inlet pipes and the first outlet pipes. And opening and closing of the valve bodies on the first inlet pipe and the first outlet pipe are controlled according to the judgment result, part of defective first pipelines are cut off, meanwhile, it is guaranteed that the remaining first pipelines can work normally, the heat recovery efficiency of the economizer is guaranteed, and energy is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of economizers, in particular to an automatically adjusted economizer. Background Art

[0002] Economizers usually include several parallel pipes, which are connected to the inlet header and the outlet header. The inlet header is connected to the inlet pipe, and a flow regulating valve is installed on the inlet pipe. The flow regulating valve can only adjust the total inlet and outlet water flow. When part of the pipes is damaged or leaking, the flow regulating valve can only be shut down for maintenance to prevent the damage from expanding, which affects the heat recovery efficiency and causes energy waste.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0004] In view of the deficiencies in the prior art, an embodiment of the utility model discloses an automatically adjustable economizer to solve the problem of reduced heat recovery efficiency and energy waste when part of the economizer pipeline leaks or is damaged.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An automatically adjustable economizer is used for a boiler, the boiler includes a furnace body, the economizer includes: a first header connected to a water inlet pipe; a second header connected to a water outlet pipe; a first-stage economizer is fixed to the furnace body, including a plurality of first pipes arranged in parallel, the first pipes including: a first inlet pipe, arranged at the outside of the furnace body and connected to the first header, a valve body, a temperature sensor and a pressure sensor being arranged on the first inlet pipe; a first outlet pipe, arranged at the outside of the furnace body and connected to the second header, a valve body, a temperature sensor and a pressure sensor being arranged on the first outlet pipe; a first bent pipe, arranged at the inside of the furnace body and connected to the first inlet pipe and the first outlet pipe.

[0007] Its further technical solution is that the economizer also includes a secondary economizer, which is fixed on the furnace body and its position corresponds to the lower end of the primary economizer, and includes a plurality of second pipes arranged in parallel, and the second pipes include: a second inlet pipe, which is arranged on the outside of the furnace body and connected to the first collecting box, and a valve body, a temperature sensor and a pressure sensor are arranged on the second inlet pipe; a second outlet pipe, which is arranged on the outside of the furnace body and connected to the second collecting box, and a valve body, a temperature sensor and a pressure sensor are arranged on the second outlet pipe; a second bent pipe, which is arranged on the inside of the furnace body and connects the second inlet pipe and the second outlet pipe.

[0008] Its further technical solution is that the first-stage economizer also includes: a first circulation pipe, connected between the first inlet pipe and the first outlet pipe, and a circulation pump and a valve body are arranged on the first circulation pipe; the second-stage economizer also includes: a second circulation pipe, connected between the second inlet pipe and the second outlet pipe, and a circulation pump and a valve body are arranged on the second circulation pipe.

[0009] A further technical solution is that the economizer comprises: a connecting pipe connected between the first outlet pipe and the second inlet pipe, and a valve body is arranged on the connecting pipe.

[0010] A further technical solution is that the economizer comprises: a frame body fixed to the inner wall of the furnace body; wherein the first pipeline and the second pipeline are respectively fixed to the frame body.

[0011] A further technical solution is that a drain pipe with a valve body is provided on the first header and the second header.

[0012] A further technical solution is that the economizer includes: a controller electrically connected to the valve body, the temperature sensor and the pressure sensor.

[0013] Its further technical solution is that the valve bodies on the first inlet pipe, the first outlet pipe, the second inlet pipe, the second outlet pipe and the connecting pipe are stop-type solenoid valves, and the valve bodies on the first circulation pipe and the second circulation pipe are check-type solenoid valves.

[0014] The beneficial effects of the embodiments of the present utility model are as follows:

[0015] (I) The utility model is an automatically adjustable economizer, comprising a first header, a second header and a first economizer, the first economizer comprising a first inlet pipe, a first bent pipe and a first outlet pipe connected in sequence, a valve body, a temperature sensor and a pressure sensor are arranged on each first inlet pipe and each first outlet pipe arranged in parallel, by comparing the values ​​detected by the temperature sensor and the pressure sensor on the first inlet pipe and the first outlet pipe, it is judged whether the first pipeline has leakage and damage, and the opening and closing of the valve body on the first inlet pipe and the first outlet pipe is controlled according to the judgment result, so as to shut off part of the first pipeline with problems, and at the same time ensure that the remaining first pipelines can work normally, thereby ensuring the heat recovery efficiency of the economizer and saving energy.

[0016] (ii) Furthermore, by arranging a first circulation pipe and a first pipeline to form a circulation loop, and arranging a second circulation pipe and a second pipeline to form a circulation loop, a higher water outlet temperature can be achieved after multiple cycles, which can meet different heating needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a structural schematic diagram of an automatically adjustable economizer.

[0018] Figure 2 The utility model is a schematic structural diagram of a primary economizer and a secondary economizer in an automatically adjustable economizer.

[0019] Figure 3 This is a connection diagram of a controller in an automatically regulating economizer of the utility model.

[0020] In the figure:

[0021] 1. Furnace body; 2. First pipeline; 21. First inlet pipe; 22. First outlet pipe; 23. First bent pipe; 24. First circulation pipe; 25. Connecting pipe; 3. Second pipeline; 31. Second inlet pipe; 32. Second outlet pipe; 33. Second bent pipe; 34. Second circulation pipe; 4. Frame; 5. Controller; 51. Valve body; 52. Temperature sensor; 53. Pressure sensor; 6. First header; 61. Water inlet pipe; 7. Second header; 71. Water outlet pipe; 8. Drain pipe. DETAILED DESCRIPTION

[0022] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0023] In order to make the purpose, technical scheme and advantages of the utility model clearer, the device proposed in the utility model is further described in detail below in combination with the accompanying drawings and specific implementation methods. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so it has no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0024] First embodiment:

[0025] This embodiment discloses an automatically regulating economizer.

[0026] Figure 1 The schematic diagram of the structure of an automatic regulating economizer of the utility model is shown in FIG. Figure 1As shown, the economizer is used for a boiler, and the boiler includes a furnace body 1, and high-temperature flue gas flows in the furnace body 1. The economizer includes a first header 6, a second header 7, and a first-stage economizer. The first header 6 is connected to an inlet pipe 61, and the second header 7 is connected to an outlet pipe 71. Cold water enters the inlet pipe 61, and hot water is discharged from the outlet pipe 71. A valve body 51 is provided on the inlet pipe 61 and the outlet pipe 71.

[0027] Figure 2 The schematic diagram of the structure of the first-stage economizer and the second-stage economizer in the automatic adjustment economizer of the utility model is shown in FIG. Figure 1 and Figure 2 As shown, the primary economizer is fixed on the furnace body 1, and includes a plurality of first pipes 2 arranged in parallel, and the first pipe 2 includes a first inlet pipe 21, a first outlet pipe 22 and a first bent pipe 23. The first inlet pipe 21 is arranged outside the furnace body 1, connected to the first header 6, and a valve body 51, a temperature sensor 52 and a pressure sensor 53 are arranged on the first inlet pipe 21. The first outlet pipe 22 is arranged outside the furnace body 1, connected to the second header 7, and a valve body 51, a temperature sensor 52 and a pressure sensor 53 are arranged on the first outlet pipe 22. The first bent pipe 23 is arranged inside the furnace body 1, connecting the first inlet pipe 21 and the first outlet pipe 22.

[0028] like Figure 1 and Figure 2 As shown, further, the economizer also includes a secondary economizer, which is fixed on the furnace body 1 and is located at the lower end of the primary economizer, and includes a plurality of second pipes 3 arranged in parallel, and the second pipes 3 include a second inlet pipe 31, a second outlet pipe 32 and a second bent pipe 33. The second inlet pipe 31 is arranged outside the furnace body 1 and connected to the first header 6, and a valve body 51, a temperature sensor 52 and a pressure sensor 53 are arranged on the second inlet pipe 31. The second outlet pipe 32 is arranged outside the furnace body 1 and connected to the second header 7, and a valve body 51, a temperature sensor 52 and a pressure sensor 53 are arranged on the second outlet pipe 32. The second bent pipe 33 is arranged inside the furnace body 1 and connected to the second inlet pipe 31 and the second outlet pipe 32. Since the secondary economizer is arranged at the lower end of the primary economizer, the temperature of the flue gas flowing through the second bent pipe 33 is lower than the temperature of the flue gas flowing through the first bent pipe 23, so the outlet water temperature provided by the primary economizer is higher, and the outlet water temperature provided by the secondary economizer is lower.

[0029] Exemplarily, the economizer includes a frame 4, which is fixed to the inner wall of the furnace body 1. The first pipe 2 and the second pipe 3 are respectively fixed to the frame 4, so that the first pipe 2 and the second pipe 3 are firmly fixed, thereby improving the service life of the economizer.

[0030] like Figure 1 As shown, further, a drain pipe 8 with a valve body 51 is provided on the first header 6 and the second header 7 to drain the remaining water in the first header 6 and the second header 7 when the economizer stops working or is repaired.

[0031] Figure 3 This is a connection diagram of the controller in an automatic regulating economizer of the utility model. Figure 3 As shown, further, the economizer includes a controller 5, which is electrically connected to the valve body 51, the temperature sensor 52 and the pressure sensor 53. In the present application, electrical connection refers to the form in which different components in the circuit are connected through physical lines such as PCB copper foil or wires that can transmit electrical signals. The valve body 51 on the water inlet pipe 61, the water outlet pipe 71, the first inlet pipe 21, the first outlet pipe 22, the second inlet pipe 31 and the second outlet pipe 32 is a stop-type solenoid valve. The controller 5 adopts a commercially available PLC controller 5, in which the control program is the prior art. The controller 5 receives the values ​​detected by the temperature sensor 52 and the pressure sensor 53, and controls the on and off of the valve body 51 according to the judgment result.

[0032] In this embodiment, a valve body 51, a temperature sensor 52 and a pressure sensor 53 are provided on each first inlet pipe 21 and each first outlet pipe 22 arranged in parallel. By comparing the values ​​detected by the temperature sensor 52 and the pressure sensor 53 on the first inlet pipe 21 and the first outlet pipe 22, it is determined whether the first pipeline 2 has leakage and damage, and the opening and closing of the valve body 51 on the first inlet pipe 21 and the first outlet pipe 22 are controlled according to the judgment result, so as to shut off part of the first pipeline 2 with problems and ensure that the remaining first pipelines 2 can work normally, thereby ensuring the heat recovery efficiency of the economizer and saving energy.

[0033] Second embodiment:

[0034] Based on the first embodiment, the second embodiment further optimizes and refines the primary economizer and the secondary economizer of the first embodiment.

[0035] like Figure 1As shown, the primary economizer also includes a first circulation pipe 24, which is connected between the first inlet pipe 21 and the first outlet pipe 22, and a circulation pump and a valve body 51 are arranged on the first circulation pipe 24. The secondary economizer also includes a second circulation pipe 34, which is connected between the second inlet pipe 31 and the second outlet pipe 32, and a circulation pump and a valve body 51 are arranged on the second circulation pipe 34. Specifically, when a higher outlet water temperature is required, the first circulation pump and the valve body 51 on the first circulation pipe 24 can be opened, and the valve bodies 51 of the first inlet pipe 21 and the first outlet pipe 22 can be closed, so that the water in the pipeline circulates to the temperature detected by the temperature detector of the first outlet pipe 22 to meet the standard, at this time, the first circulation pump and the valve body 51 on the first circulation pipe 24 are closed, and the valve bodies 51 of the first inlet pipe 21 and the first outlet pipe 22 are opened, and the water flows out through the second header 7, so that a higher outlet water temperature can be obtained. Similarly, the second circulation pump 34 and the valve body 51 on the second circulation pipe 34 can also be opened, and the valve body 51 of the second inlet pipe 31 and the second outlet pipe 32 can be closed, so that the water in the pipeline circulates to the temperature detector of the second outlet pipe 32 to detect that the temperature meets the standard. At this time, the second circulation pump 34 and the valve body 51 on the second circulation pipe 34 are closed, and the valve body 51 of the second inlet pipe 31 and the second outlet pipe 32 are opened, and the water flows out through the second collecting box 7, so that a higher water outlet temperature can be obtained.

[0036] like Figure 1 As shown, further, the economizer includes a connecting pipe 25, the connecting pipe 25 is connected between the first outlet pipe 22 and the second inlet pipe 31, and a valve body 51 is arranged on the connecting pipe 25. Exemplarily, the valve body 51 on the connecting pipe 25 is a stop-type solenoid valve, and the valve body 51 on the first circulation pipe 24 and the second circulation pipe 34 is a check-type solenoid valve. Specifically, when a higher outlet water temperature is required, the valve bodies 51 of the first inlet pipe 21, the connecting pipe 25 and the second outlet pipe 32 can be opened, and the valve bodies 51 of the first outlet pipe 22 and the second inlet pipe 31 can be closed, so that the water in the pipeline passes through the first bending pipe 23 and the second bending pipe 33 in turn, and a higher outlet water temperature is obtained through two heat exchanges.

[0037] In this embodiment, by setting the first circulation pipe 24 and the first pipeline 2 to form a circulation loop, and setting the second circulation pipe 34 and the second pipeline 3 to form a circulation loop, a higher water outlet temperature can be achieved after multiple cycles, which can meet different heating needs.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An automatically regulating economizer, characterized in that: Used for a boiler, the boiler comprises a furnace body, and the economizer comprises: The first header is connected to the water inlet pipe; The second header is connected to the water outlet pipe; The primary economizer is fixed on the furnace body and includes a plurality of first pipes arranged in parallel, wherein the first pipes include: A first inlet pipe is arranged outside the furnace body and connected to the first header, and a valve body, a temperature sensor and a pressure sensor are arranged on the first inlet pipe; a first outlet pipe, arranged outside the furnace body and connected to the second header, wherein a valve body, a temperature sensor and a pressure sensor are arranged on the first outlet pipe; The first bent pipe is arranged inside the furnace body and connects the first inlet pipe and the first outlet pipe.

2. The automatic regulating economizer according to claim 1, characterized in that: The economizer further includes a secondary economizer, which is fixed on the furnace body and located at a position corresponding to the lower end of the primary economizer, and includes a plurality of second pipes arranged in parallel, wherein the second pipes include: A second inlet pipe is arranged outside the furnace body and connected to the first header, and a valve body, a temperature sensor and a pressure sensor are arranged on the second inlet pipe; A second outlet pipe is arranged outside the furnace body and connected to the second header, and a valve body, a temperature sensor and a pressure sensor are arranged on the second outlet pipe; The second bent pipe is arranged inside the furnace body and connected with the second inlet pipe and the second outlet pipe.

3. The automatic regulating economizer according to claim 2, characterized in that: The primary economizer further comprises: A first circulation pipe, connected between the first inlet pipe and the first outlet pipe, wherein a circulation pump and a valve body are arranged on the first circulation pipe; The secondary economizer further comprises: The second circulation pipe is connected between the second inlet pipe and the second outlet pipe, and a circulation pump and a valve body are arranged on the second circulation pipe.

4. The automatic regulating economizer according to claim 3, characterized in that: The economizer comprises: A connecting pipe is connected between the first outlet pipe and the second inlet pipe, and a valve body is arranged on the connecting pipe.

5. The automatic regulating economizer according to claim 2, characterized in that: The economizer comprises: A frame body, fixed to the inner wall of the furnace body; Wherein, the first pipeline and the second pipeline are respectively fixed on the frame.

6. The automatic regulating economizer according to claim 1, characterized in that: The first header and the second header are provided with drain pipes with valve bodies.

7. The automatic regulating economizer according to claim 4, characterized in that: The economizer comprises: A controller is electrically connected to the valve body, the temperature sensor and the pressure sensor.

8. An automatically regulating economizer according to claim 7, characterized in that: The valve bodies on the first inlet pipe, the first outlet pipe, the second inlet pipe, the second outlet pipe and the connecting pipe are stop-type solenoid valves, and the valve bodies on the first circulation pipe and the second circulation pipe are check-type solenoid valves.

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