Gas-fired boiler convenient to monitor by internet of things

Abstract

The utility model discloses a gas-fired boiler convenient to monitor by internet of things, which belongs to the technical field of boilers and comprises a body, a burner, a hearth, a smoke tube, a first heat exchanger, a second heat exchanger and a third heat exchanger, and the first heat exchanger, the second heat exchanger and the third heat exchanger are connected with the smoke tube. The second heat exchanger is connected with a third heat exchanger through a second flue, the third heat exchanger is connected with a smoke exhaust barrel through a third flue, a first smoke temperature sensor is arranged on the first flue, a second smoke temperature sensor is arranged on the second flue, a third smoke temperature sensor is arranged on the third flue, and a controller is arranged on the body. And the controller is electrically connected with the data communication module. The boiler is energy-saving, environment-friendly and high in working efficiency; the heat exchange condition of flue gas can be monitored, and the water pump can be controlled to work according to the heat exchange condition, so that the temperature in the water tank or the temperature of water entering the boiler is adjusted; related parameter data of the boiler can be networked, and operation of the boiler can be controlled according to external signals.

Description

Technical Field

[0001] The utility model belongs to the technical field of boilers, and in particular relates to a gas boiler that is convenient for Internet of Things monitoring. Background Art

[0002] Steam boiler refers to boiler equipment used to produce steam. Steam boilers can be divided into oil-fired steam boilers, gas-fired steam boilers and electric steam boilers according to fuel. Gas-fired boilers are increasingly used due to their clean combustion, energy saving and low emission pollution. At present, some gas-fired boilers are not efficient in flue gas heat recovery, and the recovery effect of the heat recovery process cannot be monitored and controlled, nor can they be connected to the existing industrial Internet of Things, and cannot be remotely monitored or intelligently controlled, which cannot meet the actual use needs of customers. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a gas boiler that is convenient for Internet of Things monitoring, improve the boiler flue gas recovery efficiency, and facilitate boiler networking.

[0004] Technical solution: In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] A gas boiler that is convenient for Internet of Things monitoring, comprises a body, a burner arranged on the body, a furnace arranged in the body and connected to the burner, a smoke pipe communicated with the furnace, and a first heat exchanger, a second heat exchanger and a third heat exchanger connected to the smoke pipe, the smoke pipe is connected to the second heat exchanger through a first flue, the second heat exchanger is connected to the third heat exchanger through a second flue, the third heat exchanger is connected to a smoke exhaust pipe through a third flue, a first flue is provided with a first flue, a second flue is provided with a second flue, and a third flue is provided with a third flue, a controller that is electrically connected to the first flue, the second flue and the third flue is provided, and the controller is electrically connected to a data communication module.

[0006] Furthermore, the burner is connected to the air supply fan through a first air inlet pipe, the first air inlet pipe is connected to the first heat exchanger, the main body is connected to the water tank through a water supply pipe, the water supply pipe is connected to the second heat exchanger, the water supply pipe is provided with a water supply pump, and the third heat exchanger is connected to the water tank through a circulation pipe, and the circulation pipe is provided with a circulation pump.

[0007] Furthermore, the first air inlet pipe is provided with an air inlet sensor, the water supply pipe is provided with a water supply temperature sensor, the water tank is provided with a water tank water temperature sensor and a water tank liquid level sensor, and the air inlet sensor, water supply temperature sensor, water tank water temperature sensor and water tank liquid level sensor are all electrically connected to the controller.

[0008] Furthermore, the water replenishment pump and the circulation pump are both electrically connected to the controller.

[0009] Furthermore, the third flue is connected to the return air fan through the return air flue, the return air fan is connected to the second heat exchanger through the first return air duct, the return air fan is connected to the third heat exchanger through the second return air duct, and the return air fan is electrically connected to the controller.

[0010] Furthermore, the burner is connected to a gas pipeline, the gas pipeline is provided with a gas flow meter, and the gas flow meter is electrically connected to the controller.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following advantages:

[0012] 1. By setting up three heat exchangers, the flue gas waste heat can be fully recovered, and the sensible heat and latent heat in the flue gas can be recovered. The flue gas heat recovery effect is good and efficient. The flue gas waste heat is used to heat the air entering the burner. Increasing the air temperature is conducive to improving the combustion efficiency. The flue gas waste heat is used to heat the water in the makeup water and water tank, which is energy-saving and environmentally friendly, and the boiler has high working efficiency;

[0013] 2. Multiple flue gas temperature sensors are set up to monitor the heat exchange of flue gas and control the operation of the water pump according to the heat exchange conditions, thereby adjusting the temperature in the water tank or the water temperature entering the boiler;

[0014] 3. Set up the controller and data communication module, which can connect the boiler-related parameter data to the network and control the operation of the boiler according to external signals;

[0015] 4. Setting a return air fan can circulate the flue gas and improve the flue gas heat recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a gas boiler according to an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure inside the control box of a gas boiler in an embodiment. DETAILED DESCRIPTION

[0018] The present invention will be further explained below in conjunction with specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0019] like Figure 1As shown, a gas boiler convenient for Internet of Things monitoring includes a body 1, a burner 2, a furnace 3, a smoke pipe 4, a first heat exchanger 5, a second heat exchanger 6, a third heat exchanger 7, a water tank 8, a controller 91 and a data communication module 92. The body 1 is in a horizontal cylindrical shape as a whole. The burner 2 is arranged at one end of the body 1. The furnace 3 is arranged in the body 1 and communicated with the burner 2. A gas pipeline 23 is connected to the burner 2. The gas pipeline 23 is used to provide natural gas or liquefied gas required for combustion. The gas sprayed by the burner 2 burns in the furnace 3, thereby heating the water in the body 1. The smoke pipe 4 is arranged in the body 1 and is located above the furnace 3. The smoke pipe 4 is communicated with the furnace 3. The smoke pipe 4 includes a first smoke pipe section and a second smoke pipe section. The first heat exchanger 5 is provided The first smoke pipe section is arranged at the end where the burner 2 is located on the main body 1, and is extended to the left end of the main body 1 and communicated with the first heat exchanger 5. The second smoke pipe section is connected to the first heat exchanger 5 and extends to the right to the right end of the main body 1. The first smoke pipe section and the second smoke pipe section respectively include a plurality of smoke exhaust pipes arranged in parallel. The smoke pipe 4 is connected to the second heat exchanger 6 through the first flue 61, the second heat exchanger 6 is connected to the third heat exchanger 7 through the second flue 62, and the third heat exchanger 7 is connected to the smoke exhaust pipe through the third flue 71. The smoke generated by the combustion in the furnace 3 passes upward through the first smoke pipe section to the first heat exchanger 5, then passes through the second smoke pipe section and the first flue 61 to the second heat exchanger 6, then passes through the second flue 62 to the third heat exchanger 7, and finally passes through the third flue 71 to the smoke exhaust pipe for discharge.

[0020] The burner 2 is connected to the air supply fan 22 through the first air inlet pipe 21. The air supply fan 22 is used to transport the air required for combustion to the burner 2. The middle section of the first air inlet pipe 21 is connected to the first heat exchanger 5. Through the first heat exchanger 5, the air in the first air inlet pipe 21 exchanges heat with the flue gas in the smoke pipe 4, thereby preheating the air entering the burner 2, increasing the temperature of the air entering the furnace 3 for combustion, which is beneficial to improving the combustion efficiency.

[0021] The main body 1 is connected to the water tank 8 through a water supply pipe 81. The middle section of the water supply pipe 81 is connected to the second heat exchanger 6. A water supply pump 83 is provided on the water supply pipe 81. The water supply pump 83 sends the water in the water tank 8 to the main body 1 after passing through the second heat exchanger 6. The water in the water supply pipe 81 exchanges heat with the flue gas through the second heat exchanger 6, so that the water entering the main body 1 can be preheated, the working efficiency of the boiler can be improved, and the heat in the flue gas can be recovered, which is energy-saving and environmentally friendly. The third heat exchanger 7 is connected to the water tank 8 through a circulation pipe 82. A circulation pump 84 is provided on the circulation pipe 82. The circulation pump 84 sends the water in the water tank 8 back to the water tank 8 after passing through the third heat exchanger 7. The water in the circulation pipe 82 exchanges heat with the flue gas through the third heat exchanger 7 and then returns to the water tank 8, which can increase the temperature of the water in the water tank 8. At the same time, the third heat exchanger 7 is a condenser. The water vapor in the flue gas is condensed, and the latent heat in the flue gas can be recovered. The third flue 71 is connected to the return air fan 73 through the return air flue 72, the return air fan 73 is connected to the second heat exchanger 6 through the first return air duct 721, and the return air fan 73 is connected to the third heat exchanger 7 through the second return air duct 722. The return air fan 73 can send the flue gas in the third flue 71 back to the second heat exchanger 6 or the third heat exchanger 7 to continue to participate in heat exchange.

[0022] like Figure 1 and Figure 2 As shown, the body 1 is provided with a control box, and the control box is provided with a controller 91 and a data communication module 92, and the controller 91 is electrically connected to the data communication module 92. The controller adopts an existing PLC controller, and the data communication module 92 adopts an existing boiler Internet of Things data communication module, such as IZEGU-820-GPRS of Zegu Technology, with a power supply voltage of 24-36V, a communication interface of 485, and a communication standard of GSM / GPRS. The temperature, pressure, water level and other signals of the boiler can be transmitted to an external device or network, and the controller 91 can be controlled according to external signals. The data communication module 92 is connected with an antenna, and wireless data transmission can be performed to realize the Internet of Things of the boiler. An air inlet sensor 211 is provided on the first air inlet pipe 21, and a gas flow meter 231 and a gas flow controller are provided on the gas pipeline 23. The air supply fan 22, the gas flow controller, the air inlet sensor 211 and the gas flow meter 231 are all electrically connected to the controller 91, and the controller 91 controls the air volume and gas volume entering the burner 2. A boiler water level sensor is provided on the main body 1, a make-up water temperature sensor 811 is provided on the make-up water pipe 81, a water tank water temperature sensor 801 and a water tank liquid level sensor 802 are provided on the water tank 8, the boiler water level sensor, the make-up water temperature sensor 811, the water tank water temperature sensor 801 and the water tank liquid level sensor 802 are all electrically connected to the controller 91, so that the water level signal in the main body 1, the water temperature signal entering the main body 1, the water temperature signal in the water tank 8 and the water level signal are sent to the controller 91, the make-up water pump 83 and the circulation pump 84 are both electrically connected to the controller 91, and the controller 91 can control the operation of the two water pumps.

[0023] A first flue gas temperature sensor 401 is provided on the first flue 61, and the first flue gas temperature sensor 401 can collect the flue gas temperature before entering the second heat exchanger 6. A second flue gas temperature sensor 402 is provided on the second flue 62, and the second flue gas temperature sensor 402 can collect the flue gas temperature before entering the third heat exchanger 7. A third flue gas temperature sensor 403 is provided on the third flue 71, and the third flue gas temperature sensor 403 can collect the flue gas temperature after the third heat exchanger 7. The first flue gas temperature sensor 401, the second flue gas temperature sensor 402 and the third flue gas temperature sensor 403 are all electrically connected to the controller 91, and send the temperature signal to the controller 91. The controller 91 sends the temperature signal to the data communication module 92, so that the recovery effect of the two heat exchangers can be monitored, and the operation of the two water pumps can be controlled according to the heat exchange conditions of the heat exchangers. A steam pipeline 11 is connected to the main body 1, and the steam pipeline 11 is connected to a steam pressure sensor 111. The steam pressure sensor 111 is electrically connected to the controller 91 and sends steam pressure data to the controller 91. The controller 91 controls the air volume and gas volume entering the burner 2 according to the steam pressure data and the flue gas temperature, thereby controlling the boiler load. When it is monitored that the exhaust temperature of the third flue 71 is high, since the return air fan 73 is electrically connected to the controller 91, the third flue 71, the return air flue 72, the first return air duct 721 and the second return air duct 722 are all provided with duct valves for controlling the opening and closing of the pipelines. Each duct valve is electrically connected to the controller 91. The controller 91 controls the operation of the return air fan 73 and the opening and closing of each duct valve, thereby sending the flue gas back to the second heat exchanger 6 or the third heat exchanger 7 to continue to participate in heat exchange.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A gas boiler that is easy to monitor by the Internet of Things, characterized in that: The invention comprises a body (1), a burner (2) arranged on the body (1), a furnace (3) arranged in the body (1) and connected to the burner (2), a smoke pipe (4) communicating with the furnace (3), and a first heat exchanger (5), a second heat exchanger (6) and a third heat exchanger (7) connected to the smoke pipe (4), wherein the smoke pipe (4) is connected to the second heat exchanger (6) via a first smoke duct (61), the second heat exchanger (6) is connected to the third heat exchanger (7) via a second smoke duct (62), and the third heat exchanger (7) is connected to the third heat exchanger (7) via a second smoke duct (63). The three flues (71) are connected to the smoke exhaust pipe, the first flue (61) is provided with a first smoke temperature sensor (401), the second flue (62) is provided with a second smoke temperature sensor (402), the third flue (71) is provided with a third smoke temperature sensor (403), the body (1) is provided with a controller (91) electrically connected to the first smoke temperature sensor (401), the second smoke temperature sensor (402) and the third smoke temperature sensor (403), and the controller (91) is electrically connected to a data communication module (92).

2. The gas boiler convenient for Internet of Things monitoring according to claim 1 is characterized in that: The burner (2) is connected to the air supply fan (22) via a first air inlet pipe (21), the first air inlet pipe (21) is connected to the first heat exchanger (5), the body (1) is connected to the water tank (8) via a water supply pipe (81), the water supply pipe (81) is connected to the second heat exchanger (6), a water supply pump (83) is provided on the water supply pipe (81), and the third heat exchanger (7) is connected to the water tank (8) via a circulation pipe (82), and a circulation pump (84) is provided on the circulation pipe (82).

3. The gas boiler convenient for Internet of Things monitoring according to claim 2 is characterized in that: The first air inlet pipe (21) is provided with an air inlet sensor (211), the water supply pipe (81) is provided with a water supply temperature sensor (811), the water tank (8) is provided with a water tank water temperature sensor (801) and a water tank liquid level sensor (802), and the air inlet sensor (211), the water supply temperature sensor (811), the water tank water temperature sensor (801) and the water tank liquid level sensor (802) are all electrically connected to the controller (91).

4. The gas boiler convenient for Internet of Things monitoring according to claim 2 is characterized in that: The water replenishment pump (83) and the circulation pump (84) are both electrically connected to the controller (91).

5. The gas boiler convenient for Internet of Things monitoring according to claim 1 is characterized in that: The third flue (71) is connected to the return air fan (73) via the return air flue (72); the return air fan (73) is connected to the second heat exchanger (6) via the first return air duct (721); the return air fan (73) is connected to the third heat exchanger (7) via the second return air duct (722); and the return air fan (73) is electrically connected to the controller (91).

6. The gas boiler convenient for Internet of Things monitoring according to claim 1 is characterized in that: The burner (2) is connected to a gas pipeline (23), a gas flow meter (231) is provided on the gas pipeline (23), and the gas flow meter (231) is electrically connected to the controller (91).

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