Boiler heat recycling device

Abstract

The utility model discloses a boiler heat recycling device, which relates to the technical field of heat recycling devices, and comprises a boiler, an energy saver, a water storage tank and a hot water tank, the boiler is connected with the input end of the energy saver through a flue gas pipeline; the water storage tank is connected with the energy saver through a water inlet pipe, and the water inlet pipe is arranged close to one side of the output end of the energy saver; the hot water tank is connected with the energy saver through a first water outlet pipe, and the first water outlet pipe is arranged close to one side of the input end of the energy saver; the energy saver comprises a heat exchange box, a support, a first heat exchange coil pipe and a second heat exchange coil pipe. The first heat exchange coil pipe and the second heat exchange coil pipe are arranged in the heat exchange box, the first heat exchange coil pipe is arranged close to one side of the output end of the energy saver, and the second heat exchange coil pipe is arranged close to one side of the input end of the energy saver; the input end of the first heat exchange coil pipe is connected with the water inlet pipe, and the output end of the second heat exchange coil pipe is connected with the first water outlet pipe; the output end of the first heat exchange coil pipe is connected with the input end of the second heat exchange coil pipe through a connecting pipe; the support is arranged at the bottom of the heat exchange box and used for supporting.

Description

Technical Field

[0001] The utility model relates to the technical field of heat recovery and utilization devices, in particular to a boiler heat recovery and utilization device. Background Art

[0002] A boiler is an energy conversion device. The energy input into the boiler is in the form of chemical energy in the fuel, electrical energy, thermal energy of high-temperature flue gas, etc. After conversion by the boiler, it outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy.

[0003] Boilers are divided into hot water boilers, steam boilers, thermal oil boilers, etc. according to their functions; among them, thermal oil boilers are currently widely used in factory production, brewing and distillation production and other industries.

[0004] The working principle of a thermal oil boiler is that low-temperature thermal oil enters the boiler and is heated to displace high-temperature thermal oil, taking out the heat generated by the combustion in the furnace, transferring it to the heat-using equipment, turning it into low-temperature thermal oil, and then pumping it into the boiler again through a circulating pump; the exhaust gas temperature discharged by the thermal oil boiler is quite high, usually between 180°C and 200°C. However, when many companies use their thermal oil boilers, they usually do not utilize and treat the hot exhaust gas discharged by the boiler, resulting in serious heat waste, low energy utilization and other technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a boiler heat recovery and utilization device to solve the technical problem in the above-mentioned background technology that "the temperature of the exhaust gas discharged from the thermal oil boiler is quite high, and when many companies use their thermal oil boilers, they usually do not utilize the hot exhaust gas discharged from the boiler, resulting in serious heat waste and low energy utilization rate."

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

[0007] A boiler heat recovery and utilization device comprises a boiler, an economizer, a water storage tank and a hot water tank, wherein the boiler is connected to the input end of the economizer through a flue gas duct; the water storage tank is connected to the economizer through a water inlet pipe, and the water inlet pipe is arranged close to the output end of the economizer; the hot water tank is connected to the economizer through a first water outlet pipe, and the first water outlet pipe is arranged close to the input end of the economizer;

[0008] The energy saver comprises: a heat exchange box, a bracket, a first heat exchange coil and a second heat exchange coil;

[0009] The first heat exchange coil and the second heat exchange coil are arranged in the heat exchange box, the first heat exchange coil is arranged near the output end of the economizer, and the second heat exchange coil is arranged near the input end of the economizer;

[0010] The input end of the first heat exchange coil is connected to the water inlet pipe, and the output end of the second heat exchange coil is connected to the first water outlet pipe;

[0011] The output end of the first heat exchange coil is connected to the input end of the second heat exchange coil through a connecting pipe;

[0012] The bracket is arranged at the bottom of the heat exchange box for support.

[0013] The above technical scheme has the following beneficial effects: compared with the prior art, the boiler heat recovery and utilization device has made effective improvements to the overall structure and assembly method of the economizer, water storage tank and hot water tank. By adding an economizer at one end of the boiler, the economizer directly treats the hot exhaust gas discharged by the boiler for energy-saving utilization, thereby solving the waste of heat and improving the energy utilization rate; by connecting a water storage tank and a hot water tank to the economizer, the water storage tank cooperates with the economizer and the hot water tank to convert the cold water in the water storage tank into hot water after being processed by the economizer and stored in the hot water tank, thereby further solving the waste of heat and improving the energy utilization rate; by arranging a first heat exchange coil and a second heat exchange coil in the heat exchange box, the cold water in the water storage tank is converted into hot water after being processed by the first heat exchange coil and the second heat exchange coil, thereby further solving the waste of heat and improving the energy utilization rate.

[0014] In a preferred solution, a water inlet is provided on the top of the hot water tank, and the water inlet is connected to the first water outlet pipe;

[0015] A water outlet is arranged at the bottom of the hot water tank, and a second water outlet pipe is arranged at the water outlet.

[0016] The above technical solution has the following beneficial effects: a water inlet is provided on the top of the hot water tank, which is connected to the first water outlet pipe and is used to pour the hot water after heat exchange into the hot water tank; a water outlet is provided at the bottom of the hot water tank, which is connected to the second water outlet pipe and is used to discharge water from the hot water tank. The hot water after heat exchange can be directly used in life and other aspects.

[0017] In a preferred solution, a plurality of hot water tanks are provided, and the water inlet of each hot water tank is connected to the first water outlet pipe, and the water outlet of each hot water tank is connected to the second water outlet pipe.

[0018] The above technical solution has the beneficial effect of ensuring the storage and utilization of hot water and improving the energy utilization rate by setting the number of hot water tanks to be several.

[0019] In a preferred solution, a first pneumatic valve is provided between each water inlet and the first water outlet pipe, and a second pneumatic valve is provided between each water outlet and the second water outlet pipe.

[0020] The above technical solution has the following beneficial effects: by providing a first pneumatic valve between each water inlet and the first water outlet pipe, the first pneumatic valve is used for controlling the water inlet to ensure the control of the water inlet of each hot water tank; by providing a second pneumatic valve between each water outlet and the second water outlet pipe, the second pneumatic valve is used for controlling the water outlet to ensure the control of the water outlet of each hot water tank.

[0021] In a preferred solution, a first water pump is provided between the water storage tank and the water inlet pipe.

[0022] The beneficial effects of the above technical solution are as follows: by providing a first water pump between the water storage tank and the water inlet pipe, the first water pump draws out the cold water in the water storage tank and transports it to the first heat exchange coil and the second heat exchange coil. The cold water is transported from the first heat exchange coil to the second heat exchange coil to achieve heat exchange, thereby ensuring improved heat exchange efficiency and improved energy utilization.

[0023] A second water pump is provided at the output end of the second water outlet pipe.

[0024] The above technical solution has the beneficial effect that a second water pump is provided at the output end of the second water outlet pipe to ensure the subsequent extraction and utilization of hot water in the hot water tank.

[0025] Preferably, a water inlet is provided on the top of the water storage tank.

[0026] The above technical solution has the beneficial effect that a water injection port is provided at the top of the water storage tank to ensure the subsequent addition of cold water into the water storage tank.

[0027] Preferably, the hot water tank is also provided with a temperature display.

[0028] The above technical solution has the beneficial effect that by providing a temperature display on the hot water tank, the temperature of the water in the hot water tank and the heat exchange efficiency can be monitored at any time.

[0029] In a preferred solution, the first heat exchange coil and the second heat exchange coil are spiral tubular structures and are integrally formed.

[0030] The above technical solution has the beneficial effect of increasing the heat exchange area of ​​the heat exchanger by making the first heat exchange coil and the second heat exchange coil into a spiral tubular structure and integrally forming them, thereby improving the heat exchange efficiency and further improving the energy utilization rate.

[0031] In a preferred solution, the spiral tubular outer surfaces of the first heat exchange coil and the second heat exchange coil are further provided with fins.

[0032] The above technical solution has the beneficial effect that by providing fins on the outer surfaces of the first heat exchange coil and the second heat exchange coil, the heat dissipation area of ​​the heat exchanger is further increased to improve the heat exchange efficiency and further improve the energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 The overall structure and assembly diagram of a boiler heat recovery device provided in Example 1 of the utility model;

[0035] Figure 2 A schematic diagram of the structure of a hot water tank provided in Example 1 of the utility model;

[0036] Description of reference numerals;

[0037] 1- boiler; 2- economizer; 3- water storage tank; 4- hot water tank; 5- flue gas duct; 6- water inlet pipe; 7- first water outlet pipe; 8- heat exchange box; 9- bracket; 10- first heat exchange coil; 11- second heat exchange coil; 12- connecting pipe; 13- water inlet; 14- water outlet; 15- second water outlet pipe; 16- first pneumatic valve; 17- second pneumatic valve; 18- first water pump; 19- second water pump; 20- water inlet; 21- temperature display; 22- flue gas duct outlet. DETAILED DESCRIPTION

[0038] Example 1

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments.

[0040] like Figure 1 to Figure 2 As shown, a boiler heat recovery and utilization device includes a boiler 1, an economizer 2, a water storage tank 3 and a hot water tank 4. The boiler 1 is connected to the input end of the economizer 2 through a flue gas duct 5; the water storage tank 3 is connected to the economizer 2 through a water inlet pipe 6, and the water inlet pipe 6 is arranged close to the output end of the economizer 2; the hot water tank 4 is connected to the economizer 2 through a first water outlet pipe 7, and the first water outlet pipe 7 is arranged close to the input end of the economizer 2;

[0041] The economizer 2 includes: a heat exchange box 8, a bracket 9, a first heat exchange coil 10 and a second heat exchange coil 11;

[0042] Specifically, the first heat exchange coil 10 and the second heat exchange coil 11 are arranged in the heat exchange box 8, the first heat exchange coil 10 is arranged near the output end of the economizer 2, and the second heat exchange coil 11 is arranged near the input end of the economizer 2;

[0043] The input end of the first heat exchange coil 10 is connected to the water inlet pipe 6, and the output end of the second heat exchange coil 11 is connected to the first water outlet pipe 7;

[0044] More specifically, the output end of the first heat exchange coil 10 is connected to the input end of the second heat exchange coil 11 through a connecting pipe 12;

[0045] The bracket 9 is arranged at the bottom of the heat exchange box 8 for support; the overall structure and assembly method of the economizer 2, the water storage tank 3 and the hot water tank 4 are effectively improved, and the economizer 2 is added to one end of the boiler 1. The economizer 2 directly treats the hot exhaust gas discharged by the boiler 1 for energy saving, thereby solving the waste of heat and improving the energy utilization rate; the water storage tank 3 and the hot water tank 4 are connected to the economizer 2, and the water storage tank 3 cooperates with the economizer 2 and the hot water tank 4 to convert the cold water in the water storage tank 3 into hot water after being processed by the economizer 2 and stored in the hot water tank 4, thereby further solving the waste of heat and improving the energy utilization rate; the first heat exchange coil 10 and the second heat exchange coil 11 are arranged in the heat exchange box 8, and the cold water in the water storage tank 3 is converted into hot water after being processed by the first heat exchange coil 10 and the second heat exchange coil 11, thereby further solving the waste of heat and improving the energy utilization rate.

[0046] In this embodiment, a water inlet 13 is provided on the top of the hot water tank 4, and the water inlet 13 is connected to the first water outlet pipe 7; by providing a water inlet 13 on the top of the hot water tank 4, the water inlet 13 is connected to the first water outlet pipe 7, and the hot water after heat exchange is poured into the hot water tank 4;

[0047] A water outlet 14 is provided at the bottom of the hot water tank 4, and a second water outlet pipe 15 is provided at the water outlet 14; a water outlet 14 is provided at the bottom of the hot water tank 4, and the water outlet 14 is connected to the second water outlet pipe 15 for water outlet from the hot water tank 4. The hot water after heat exchange can be directly used in life and other aspects.

[0048] In this embodiment, a plurality of hot water tanks 4 are provided, and the water inlet 13 of each hot water tank 4 is connected to the first water outlet pipe 7, and the water outlet 14 of each hot water tank 4 is connected to the second water outlet pipe 15; by providing a plurality of hot water tanks 4, the storage and utilization of hot water is ensured, and the energy utilization rate is improved.

[0049] In this embodiment, a first pneumatic valve 16 is provided between each water inlet 13 and the first water outlet pipe 7, and a second pneumatic valve 17 is provided between each water outlet 14 and the second water outlet pipe 15; by providing a first pneumatic valve 16 between each water inlet 14 and the first water outlet pipe 7, the first pneumatic valve 16 is used for the control switch of the water inlet 13 to ensure the control of the water inlet amount of each hot water tank 4; by providing a second pneumatic valve 17 between each water outlet 14 and the second water outlet pipe 15, the second pneumatic valve 17 is used for the control switch of the water outlet 14 to ensure the control of the water outlet amount of each hot water tank.

[0050] In this embodiment, a first water pump 18 is provided between the water storage tank 3 and the water inlet pipe 6; by providing the first water pump 18 between the water storage tank 3 and the water inlet pipe 6, the first water pump 18 draws out the cold water in the water storage tank 3 and transports it to the first heat exchange coil 10 and the second heat exchange coil 11, and the cold water is transported from the first heat exchange coil 10 to the second heat exchange coil 11 to achieve heat exchange, thereby ensuring improved heat exchange efficiency and improved energy utilization.

[0051] In this embodiment, a second water pump 19 is provided at the output end of the second water outlet pipe 15 . By providing the second water pump 19 at the output end of the second water outlet pipe 15 , it is ensured that the hot water in the hot water tank 4 can be subsequently extracted and utilized.

[0052] In this embodiment, a water injection port 20 is provided on the top of the water storage tank 3 . By providing the water injection port 20 on the top of the water storage tank 3 , the subsequent addition of cold water into the water storage tank 3 is ensured.

[0053] In this embodiment, a temperature display 21 is further provided on the hot water tank 4. By providing the temperature display 21 on the hot water tank 4, it is ensured that the temperature of the water in the hot water tank 4 and the heat exchange efficiency can be monitored at any time.

[0054] In this embodiment, the first heat exchange coil 10 and the second heat exchange coil 11 are spiral tubular structures and are integrally formed. By making the first heat exchange coil 10 and the second heat exchange coil 11 into a spiral tubular structure and integrally formed, the heat exchange area of ​​the heat exchanger is increased, the heat exchange efficiency is improved, and the energy utilization rate is further improved.

[0055] In this embodiment, the spiral tubular outer surfaces of the first heat exchange coil 10 and the second heat exchange coil 11 are further provided with fins. By providing fins on the outer surfaces of the first heat exchange coil 10 and the second heat exchange coil 11, the heat dissipation area of ​​the heat exchanger is further increased to improve the heat exchange efficiency and further improve the energy utilization rate.

[0056] In this embodiment, the heat exchange box 8 is further provided with a flue gas duct outlet 22, which is arranged close to the output end of the economizer 2 and is used to directly connect to an instrument that needs to be heated, such as a distillation kettle.

[0057] In this embodiment, the hot water tank 4 is made of heat-insulating material to ensure that the hot water after heat exchange will not cause heat loss.

[0058] In this embodiment, the control between the first pneumatic valve 16 and the second pneumatic valve 17 does not involve specific algorithms and circuit diagrams, which are conventional techniques in the art.

[0059] Specific usage of this utility model:

[0060] Step 1: Assemble the first heat exchange coil 10 and the second heat exchange coil 11 in the heat exchange box 8, and connect the output end of the first heat exchange coil 10 to the input end of the second heat exchange coil 11 through the connecting pipe 12;

[0061] Step 2: Fix the bracket 9 to the bottom of the heat exchange box 8 for support and fixation;

[0062] Step 3: connect the boiler 1 to the input end of the heat exchange box 8 through the flue gas duct 5, connect the water storage tank 3 to the input end of the first heat exchange coil 10 through the water inlet pipe 6, and connect the hot water tank 4 to the output end of the second heat exchange coil 11 through the first water outlet pipe 7;

[0063] Step 4: Start the first water pump 18, the first water pump 18 pumps the cold water in the water storage tank 3 and transports it to the first heat exchange coil 10 and the second heat exchange coil 11, and the cold water is transported from the first heat exchange coil 10 to the second heat exchange coil 11 for heat exchange;

[0064] Step 5: Start the second water pump 19 at the output end of the second water outlet pipe 15, and the second water pump 19 extracts and utilizes the hot water in the hot water tank 4.

[0065] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0066] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention.

[0067] The above are only preferred implementations of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the utility model, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should all be regarded as protection of the utility model.

Claims

1. A boiler heat recovery device, comprising a boiler (1), an economizer (2), a water storage tank (3) and a hot water tank (4), characterized in that: The boiler (1) is connected to the input end of the economizer (2) via a flue gas duct (5); the water storage tank (3) is connected to the economizer (2) via a water inlet pipe (6), and the water inlet pipe (6) is arranged close to the output end of the economizer (2); the hot water tank (4) is connected to the economizer (2) via a first water outlet pipe (7), and the first water outlet pipe (7) is arranged close to the input end of the economizer (2); The energy saver (2) comprises: a heat exchange box (8), a bracket (9), a first heat exchange coil (10) and a second heat exchange coil (11); The first heat exchange coil (10) and the second heat exchange coil (11) are arranged in the heat exchange box (8), the first heat exchange coil (10) is arranged close to the output end of the economizer (2), and the second heat exchange coil (11) is arranged close to the input end of the economizer (2); The input end of the first heat exchange coil (10) is connected to the water inlet pipe (6), and the output end of the second heat exchange coil (11) is connected to the first water outlet pipe (7); The output end of the first heat exchange coil (10) is connected to the input end of the second heat exchange coil (11) via a connecting pipe (12); The bracket (9) is arranged at the bottom of the heat exchange box (8) for support.

2. A boiler heat recovery device according to claim 1, characterized in that: The top of the hot water tank (4) is provided with a water inlet (13), and the water inlet (13) is connected to the first water outlet pipe (7); A water outlet (14) is provided at the bottom of the hot water tank (4), and a second water outlet pipe (15) is provided at the water outlet (14).

3. A boiler heat recovery device according to claim 2, characterized in that: The hot water tanks (4) are provided in a plurality, and the water inlet (13) of each hot water tank (4) is connected to the first water outlet pipe (7), and the water outlet (14) of each hot water tank (4) is connected to the second water outlet pipe (15).

4. A boiler heat recovery device according to claim 3, characterized in that: A first pneumatic valve (16) is provided between each water inlet (13) and the first water outlet pipe (7), and a second pneumatic valve (17) is provided between each water outlet (14) and the second water outlet pipe (15).

5. The boiler heat recovery device according to claim 1, characterized in that: A first water pump (18) is provided between the water storage tank (3) and the water inlet pipe (6).

6. The boiler heat recovery device according to claim 2, characterized in that: A second water pump (19) is provided at the output end of the second water outlet pipe (15).

7. The boiler heat recovery device according to claim 1, characterized in that: The top of the water storage tank (3) is provided with a water injection port (20).

8. The boiler heat recovery device according to claim 1, characterized in that: The hot water tank (4) is also provided with a temperature display (21).

9. The boiler heat recovery device according to claim 1, characterized in that: The first heat exchange coil (10) and the second heat exchange coil (11) are spiral tubular structures and are integrally formed.

10. The boiler heat recovery device according to claim 9, characterized in that: The first heat exchange coil (10) and the second heat exchange coil (11) are also provided with fins on their spiral tubular outer surfaces.

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