Air preheating economizer

Abstract

The utility model discloses an air preheating economizer, comprising: an economizer body, which is provided with a heat exchanger to heat the fresh air temperature at the air inlet of a gas boiler; a flue outlet connector, one end of the flue outlet connector is connected to the economizer body, and the other end of the flue outlet connector is connected to the flue outlet of the boiler, wherein a condensation recovery device is arranged in the flue outlet connector; a smoke outlet connector, one end of the smoke outlet connector is connected to the economizer body, and the other end of the smoke outlet connector is connected to the chimney of the boiler; a fresh air inlet connector, which is connected to the economizer body; a hot air outlet connector, one end of the hot air outlet connector is connected to the economizer body, and the hot air outlet connector is connected to a burner; the economizer can improve the combustion efficiency of the boiler and is beneficial to the heat exchange of the tubular heat exchanger.

Description

Technical Field

[0001] The utility model belongs to the technical field of boiler combustion energy-saving equipment and facilities, and particularly relates to an air preheating energy saver. Background Art

[0002] The exhaust gas temperature of a general boiler is usually high, around 150℃. If this waste heat is not fully utilized, it will be discharged into the atmosphere along with the flue gas, which not only wastes energy but also pollutes the environment. The boiler economizer improves the thermal efficiency of the boiler by recycling and reusing the waste heat from the boiler's exhaust gas. The principle is to introduce the boiler's exhaust gas into the economizer, and transfer the waste heat in the exhaust gas to the water entering the economizer through a heat exchanger, so that the water temperature increases and the exhaust gas temperature decreases. This process can recycle the waste heat in the exhaust gas, reduce energy waste, and reduce environmental pollution, thus creating an economizer device.

[0003] The fresh air involved in combustion, the increase in wind temperature can increase the speed of boiler gas entering the furnace, speed up the mixing of fuel in the boiler, and increase combustion efficiency. At the same time, the increase in wind temperature can also increase the oxidation reaction rate of fuel, shorten the combustion time, and improve the utilization rate of fuel, thus producing air preheater equipment.

[0004] For example, the Chinese invention patent application document with the number CN202310831828.0 discloses a plate-type air preheater, including a preheater body and further comprising:

[0005] The first air inlet pipe and the first air outlet pipe are fixedly connected to the preheater body, and the first air inlet pipe and the first air outlet pipe are symmetrically arranged; the first air inlet pipe, the first air outlet pipe, the second air inlet pipe and the second air outlet pipe are symmetrically arranged in pairs; the first air inlet pipe, the first air outlet pipe, the second air inlet pipe and the second air outlet pipe are all fixedly connected with a filter; the first air inlet pipe is connected to the flue gas exhaust pipe, the second air inlet pipe is connected to the air inlet pipe, and the first outlet pipe is connected to the exhaust pipe; the second outlet pipe is connected to the preheating output pipeline; the driving cylinder is fixedly connected to the preheater body; the sliding plug is slidably connected to the driving cylinder; the spray pipe is fixedly connected to the driving cylinder, and the end of the spray pipe away from the driving cylinder is connected to the first air outlet pipe; the filter on the inside of the first air outlet pipe is a multi-layer filter; a nozzle is installed on the inside of the filter; the spray pipe is connected to the nozzle.

[0006] The above-mentioned prior art has the following technical problems in actual application:

[0007] If the condensed water is not treated during the operation of the preheater, it may easily cause the preheater to malfunction.

[0008] Based on the above technical problems existing in the prior art, the utility model provides an air preheating energy saver. Summary of the Invention

[0009] The utility model provides an air preheating energy saver.

[0010] The utility model adopts the following technical solutions:

[0011] An air preheating economizer, comprising:

[0012] The economizer body is equipped with a heat exchanger to heat the fresh air temperature at the gas boiler air inlet;

[0013] a flue outlet connector, one end of which is connected to the economizer body, and the other end of which is connected to the boiler flue outlet, wherein a condensate recovery device is provided in the flue outlet connector;

[0014] a flue gas outlet connector, one end of which is connected to the economizer body, and the other end of which is connected to the chimney of the boiler;

[0015] A fresh air inlet connector, the fresh air inlet connector being connected to the energy saver body;

[0016] A hot air outlet connector, one end of which is connected to the economizer body, and the other end of which is connected to the burner.

[0017] Furthermore, a tubular heat exchanger is provided in the economizer body, the lower end of the tubular heat exchanger is connected to the flue outlet connector, and the upper end of the tubular heat exchanger is connected to the fresh air inlet connector.

[0018] Furthermore, the angle between the tubular heat exchanger and the horizontal plane is 5-10 degrees.

[0019] Furthermore, the hot air outlet connector is connected to the burner through a pipe and a flange, and the diameter of the pipe is greater than or equal to 1.5 times the fresh air inlet of the burner.

[0020] Furthermore, the first half pipe and the second half pipe are arranged side by side inside the condensate recovery device, the second half pipe is located below the first half pipe, and the bottom ends of the first half pipe and the second half pipe are both connected to the condensate outlet.

[0021] Furthermore, the diameter of the second half pipe is larger than the diameter of the first half pipe.

[0022] Furthermore, the first half-tube and the second half-tube are staggered so that condensed water generated on the wall of the first half-tube drips down the bottom of the half-tube and directly drips into the receiving second half-tube.

[0023] Furthermore, a first temperature sensor is provided in the flue outlet connector.

[0024] Furthermore, a second temperature sensor is provided in the smoke outlet connector.

[0025] Furthermore, a third temperature sensor is provided in the fresh air inlet connector.

[0026] Furthermore, a fourth temperature sensor is provided in the hot air outlet connector.

[0027] Compared with the prior art, the advantages of this utility model are:

[0028] 1. The air preheating economizer of the present invention can improve the combustion efficiency of the boiler by co-arranging the economizer body, the condensation recovery device, the hot air outlet connector and the fresh air inlet connector;

[0029] 2. The air preheating economizer of the present invention adopts an inclined tubular heat exchanger, which is beneficial to the heat exchange of the tubular heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural diagram of an air preheating economizer in an embodiment of the present utility model;

[0031] Figure 2 It is a structural diagram of the condensation recovery device in an embodiment of the utility model.

[0032] In the figure, 1-energy saver body, 2-flue outlet connector, 3-condensation recovery device, 4-condensate tank, 5-condensate outlet, 6-heat exchanger, 7-hot air outlet connector, 8-flange, 9-fresh air inlet connector, 10-flue gas outlet connector, 11-first temperature sensor, 12-second temperature sensor, 13-third temperature sensor, 14-fourth temperature sensor, 15-first half pipe, 16 second half pipe. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, unless there is a conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0034] Example

[0035] like Figure 1As shown, the air preheating economizer includes:

[0036] The economizer body 1 is provided with a heat exchanger 6 to heat the fresh air temperature at the air inlet of the gas boiler;

[0037] a flue outlet connector 2, one end of which is connected to the economizer body 1, and the other end of which is connected to the boiler flue outlet, wherein a condensation recovery device 3 is provided in the flue outlet connector 2;

[0038] a flue gas outlet connector 10, one end of which is connected to the economizer body 1, and the other end of which is connected to the chimney of the boiler;

[0039] A fresh air inlet connector 9, the fresh air inlet connector 9 is connected to the energy saver body 1;

[0040] a hot air outlet connector 7, one end of which is connected to the economizer body 1, and the other end of which is connected to a burner (not shown);

[0041] As a specific embodiment, the economizer body 1 is composed of a connected box A and a box B, wherein the top of the box A is connected to the flue gas outlet connector 10, and the bottom end of the box A is connected to the flue outlet connector 2; the top of the box B is connected to the fresh air inlet connector 9, and the bottom end of the box B is connected to the hot air outlet connector 7. During actual operation, under the action of the negative pressure attraction of the burner combustion-supporting fan, hot air flows into the burner through the hot air outlet connector 7 to form a negative pressure, and fresh air enters the economizer body 1 through the fresh air inlet connector 9. Under the heat transfer action of the finned tubes, the fresh air is heated to a temperature higher than the ambient temperature and provided to the burner combustion-supporting high-temperature fresh air, so that the boiler gas burns more fully under the action of the high-temperature fresh air;

[0042] The fresh air inlet connector 9 and the hot air outlet connector 7 are in the opposite direction to the heat transfer flow inside the economizer body 1, producing a reverse heat transfer effect. The fresh air flow direction of the air preheating economizer is from top to bottom, achieving cross heat transfer.

[0043] The flue outlet connector 2 is provided with a first temperature sensor 11;

[0044] The smoke outlet connector 10 is provided with a second temperature sensor 12;

[0045] The fresh air inlet connector 9 is provided with a third temperature sensor 13;

[0046] The hot air outlet connector 7 is provided with a fourth temperature sensor 14;

[0047] By setting the first temperature sensor 11, the second temperature sensor 12, the third temperature sensor 13, and the fourth temperature sensor 14, the temperature of the inlet and outlet of the air preheating economizer is monitored, and the temperature information of the air preheating economizer is fully collected;

[0048] The temperature data obtained by the first temperature sensor 11 is uploaded to the host computer to represent the temperature information of the flue gas before energy-saving treatment;

[0049] The temperature data obtained by the second temperature sensor 12 is uploaded to the host computer to represent the temperature information of the flue gas after energy-saving treatment;

[0050] The temperature data obtained by the third temperature sensor 13 is uploaded to the host computer to represent the temperature information of the fresh air before air preheating;

[0051] The temperature data obtained by the fourth temperature sensor 14 is uploaded to the host computer to represent the temperature information of the fresh air after air preheating;

[0052] A tubular heat exchanger is provided in the economizer body 1 , the lower end of the tubular heat exchanger is close to the flue outlet connector 2 , and the upper end of the tubular heat exchanger is close to the fresh air inlet connector 9 ;

[0053] The angle between the tubular heat exchanger and the horizontal plane is 5-10 degrees;

[0054] Exemplarily, the tubular heat exchanger is made of 304 stainless steel;

[0055] In the above embodiment, the inclined tubular heat exchanger facilitates heat transfer and maintains a certain designed slope, allowing the heat in the tube to rise and transfer. The density of hot water is lower than that of cold water, which is beneficial to heat exchange in the tube.

[0056] The hot air outlet connector 7 is connected to the burner through a pipe and a flange 8, and the diameter of the pipe is greater than or equal to 1.5 times the fresh air inlet of the burner.

[0057] like Figure 2 As shown, a first half pipe 15 and a second half pipe 16 are arranged side by side inside the condensate recovery device, and the second half pipe 16 is located below the first half pipe 15. The bottom ends of the first half pipe 15 and the second half pipe 16 are both connected to the condensate outlet 5 through the condensate tank 4;

[0058] It should be noted that, in the above embodiment, two layers of half-tubes are used for condensation recovery. Depending on the internal space and condensation needs, a layout with more or less than two layers of half-tubes may also be provided.

[0059] The diameter of the second half pipe 16 is larger than the diameter of the first half pipe 15;

[0060] For example, the second half pipe 16 installed on the lower side is made of DN100 stainless steel pipe, and the first half pipe 15 installed on the upper side is made of DN80 stainless steel pipe;

[0061] The first half pipe 15 and the second half pipe 16 are arranged alternately, so that condensed water generated on the wall of the first half pipe 15 drips down the bottom of the half pipe into the second half pipe 16 where it is received, and then flows from the second half pipe 16 to the condensed water outlet.

[0062] The present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims.

Claims

1. An air preheating economizer, characterized in that: include: The economizer body is provided with a heat exchanger to heat the fresh air temperature at the air inlet of the gas boiler; A flue outlet connector, one end of which is connected to the economizer body, and the other end of which is connected to the flue outlet of the boiler, wherein a condensation recovery device is provided in the flue outlet connector; A flue gas outlet connector, one end of which is connected to the economizer body, and the other end of which is connected to the chimney of the boiler; A fresh air inlet connector, the fresh air inlet connector is connected to the energy saver body; A hot air outlet connector, one end of which is connected to the economizer body, and the other end of which is connected to the burner.

2. The air preheating economizer according to claim 1, characterized in that: A tubular heat exchanger is arranged in the energy saver body, the lower end of the tubular heat exchanger is connected to the flue outlet connector, and the upper end of the tubular heat exchanger is connected to the fresh air inlet connector.

3. The air preheating economizer according to claim 2, characterized in that: The angle between the tubular heat exchanger and the horizontal plane is 5-10 degrees.

4. The air preheating economizer according to claim 1, characterized in that: The hot air outlet connector is connected to the burner through a pipeline and a flange, and the diameter of the pipeline is greater than or equal to 1.5 times the fresh air inlet of the burner.

5. The air preheating economizer according to claim 1, characterized in that: The condensate recovery device has a first half pipe and a second half pipe arranged side by side inside, the second half pipe is located below the first half pipe, and the bottom ends of the first half pipe and the second half pipe are both connected to the condensate outlet.

6. The air preheating economizer according to claim 5, characterized in that: The diameter of the second half pipe is larger than the diameter of the first half pipe.

7. The air preheating economizer according to claim 5 or 6, characterized in that: The first half-tube and the second half-tube are staggered so that condensed water generated on the wall of the first half-tube drips down the bottom of the half-tube and directly drips into the receiving second half-tube.

8. The air preheating economizer according to claim 1, characterized in that: A first temperature sensor is provided in the flue outlet connector; A second temperature sensor is provided in the smoke outlet connector; A third temperature sensor is provided in the fresh air inlet connector; A fourth temperature sensor is disposed in the hot air outlet connector.

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