Steam boiler provided with solar hot water energy-saving system

Abstract

The utility model belongs to the field of steam boilers, and provides a steam boiler with a solar hot water energy-saving system, which comprises a boiler, a flue gas waste heat recovery device and a solar heating device, a 1 # tank is arranged at the tail end of a preheating pipe, and a first water supplementing pipe connected with the solar heating device is arranged on the 1 # tank. A second water supplementing pipe is arranged on the solar heating device, a second tank is arranged at the tail end of the second water supplementing pipe, a hot water supply pipe connected with the boiler is arranged on the second tank, a water-steam separation device communicated with the second tank and the first tank is arranged between the second tank and the first tank, and the water-steam separation device comprises a tank body, two steam inlet branch pipes, an exhaust pipe and two condensate water return pipes. According to the utility model, the mode of preheating and then solar heating is adopted, the gas consumption is greatly reduced by about 30%, the design is reasonable, the structure is simple, the cost is reduced, the hot water supply efficiency and the overall workshop production efficiency are ensured, and the device is suitable for large-scale popularization.

Description

Technical Field

[0001] The utility model belongs to the field of steam boilers, relates to an edible oil refining workshop, and in particular to a steam boiler equipped with a solar water heating energy-saving system. Background Art

[0002] The main equipment in the crude edible oil refining section includes refining tanks, bleaching tanks, deodorizing tanks, steam boilers, thermal oil boilers, vacuum pumps, and filtration equipment. Steam boilers typically feed treated, ordinary cold water directly into the boiler, where it is heated to 100°C using gas and then continuously heated to generate steam for use in the production workshop. Since the process of heating ordinary cold water to 100°C requires the combustion of large amounts of natural gas, this process is energy-intensive and costly.

[0003] Patent CN201310750122.8 discloses a thermal system that combines solar energy with an oil-fired gas boiler. The system includes a solar heating device, a water vapor separation device, an oil-fired gas boiler, and a flue gas waste heat recovery device. The solar heating device includes a water inlet and a water outlet connected to the water vapor separation device. The oil-fired gas boiler includes a boiler cavity, a burner disposed within the boiler cavity, a steam delivery pipe disposed above the boiler cavity, and a heat exchange coil disposed within the boiler cavity. The boiler cavity includes a water reservoir and a steam layer disposed above the water reservoir and connected to the steam delivery pipe. The outlet of the heat exchange coil is connected to the water inlet of the solar heating device via a circulation pipe equipped with a circulation pump. A connecting pipe connected to the heat exchange coil is provided below the water vapor separation device. The combined use of the solar heating device and the oil-fired gas boiler meets steam and hot water supply requirements, reduces oil and gas consumption, and offers the advantages of energy conservation and emission reduction. However, a problem with this system in actual production operations is that the water stored in the hot water tank and the hot water required by the steam boiler must be processed by a water-vapor separation device, which requires a high processing capacity of the water-vapor separation device. The steam boiler consumes a large amount of water, and the pipeline is prone to insufficient hot water supply, affecting the actual production efficiency of the workshop. Utility Model Content

[0004] In response to the technical problems existing in the water use of the above-mentioned steam boilers, the utility model proposes a steam boiler equipped with a solar water heating and energy-saving system, which has a reasonable design and a simple structure, is conducive to reducing costs, and is conducive to ensuring the efficiency of hot water supply and the overall production efficiency of the workshop.

[0005] In order to achieve the above object, the utility model adopts the technical scheme, provide a kind of steam boiler of solar energy hot water energy-saving system of configuration, including boiler, flue gas waste heat recovery device and solar heating device, the flue gas waste heat recovery device is connected with boiler by flue gas duct, the flue gas waste heat recovery device is provided with cold water pipe and preheating pipe, the end of the preheating pipe is provided with 1# tank, 1# tank is provided with the first water supply pipe connected with solar heating device, solar heating device is provided with second water supply pipe, the end of second water supply pipe is provided with 2# tank, 2# tank is provided with hot water supply pipe connected with boiler, 2# tank and 1# tank between being provided with water vapor separation device communicated with both, the water vapor separation device includes tank body, the both ends of the tank body are provided with 2 respectively with 1# tank and 2# tank communication steam branch pipe, the top of the tank body is provided with 1 exhaust pipe, the bottom of the tank body is provided with 2 respectively with 1# tank and 2# tank communication condensate return pipe.

[0006] As preferred, the steam branch pipe includes a branch pipe body, one end of the branch pipe body is provided with a connecting flange, the other end of the branch pipe body is provided with a flange end cover, the inside of the steam branch pipe is provided with a T-shaped heat insulation sleeve nested with the branch pipe body and the flange end cover, the both ends of the tank body are flange-connected with the flange end cover and the end portions of the T-shaped heat insulation sleeve, the outside of the tank body is provided with a plurality of condensing fins distributed in a circular array along the center thereof.

[0007] As preferred, the tank body is provided with a partition in the middle, the longitudinal section of the partition is in an inverted U shape and is in communication with the outside, the partition divides the inside of the tank body into two left and right chambers, the top of the partition is provided with a conical opening, the conical opening is provided with a valve core rotatably fitted therein, the valve core is provided with two groups of exhaust holes in communication with the left and right chambers of the tank body.

[0008] As preferred, the valve core includes a cylindrical section and a conical section, the outside of the cylindrical section is provided with a threaded pair matched with the exhaust pipe, the upper half of the inner wall of the cylindrical section is provided with an internal hexagonal hole, the center of the conical section is provided with a partition, the top of the partition is provided with a top plate, the top plate is provided with through holes in communication with the left and right chambers of the tank body.

[0009] Compared with the prior art, the utility model has the advantages and positive effects that:

[0010] This utility model provides a steam boiler equipped with a solar water heating energy-saving system. In a series arrangement, cold water enters tank 2 through flue gas preheating and solar heating. Tank 2 then centrally supplies hot water to the steam boiler, thereby meeting hot water demand and facilitating workshop production efficiency. Simultaneously, a water vapor separation device simultaneously separates and processes water vapor in tanks 1 and 2, resulting in high practicality and utilization. This system, which employs a preheating-then-solar heating approach, significantly reduces gas consumption by approximately 30%. Its rational design and simple structure contribute to cost reductions, ensuring efficient hot water supply and overall workshop production efficiency, making it suitable for large-scale deployment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Fig. 1 A schematic structural diagram of a steam boiler equipped with a solar water heating energy-saving system provided in an embodiment;

[0013] Fig. 2 An axonometric view of a water vapor separation device provided in an embodiment;

[0014] Fig. 3 A cross-sectional view of a water vapor separation device provided in an embodiment;

[0015] Fig. 4 A cross-sectional view of the water vapor separation device provided in the embodiment in another direction;

[0016] Fig. 5 A schematic diagram of the coordination between the spacer and the valve core provided in the embodiment;

[0017] In the above figures, 1. boiler; 2. flue gas waste heat recovery device; 3. solar heating device; 4. exhaust pipe; 5. cold water pipe; 6. preheating pipe; 7. 1# tank; 8. first feed water pipe; 9. second feed water pipe; 10. 2# tank; 11. hot water supply pipe; 12. water vapor separation device; 121. tank body; 122. steam inlet branch pipe; 1221. branch pipe body; 1222. connecting flange; 1223. flange end cover; 123. exhaust pipe; 124. condensate return pipe; 125. T-type insulation sleeve; 126. condensing plate; 127. spacer; 128. valve core; 1281. exhaust hole; 1282. cylindrical section; 1283. conical section; 1284. hexagonal hole; 1285. partition; 1286. top plate; 1287. through hole. DETAILED DESCRIPTION

[0018] To more clearly understand the above-mentioned objects, features, and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein may be combined with each other unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appearing below merely indicate the same directions as in the drawings themselves and do not limit the structure.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Examples, such as Figs. 1-5 As shown, the present invention provides a steam boiler equipped with a solar water heating energy-saving system, comprising a boiler 1, a flue gas waste heat recovery device 2, and a solar heating device 3. The flue gas waste heat recovery device 2 is connected to the boiler 1 via a flue gas exhaust pipe 4. The flue gas waste heat recovery device 2 is provided with a cold water pipe and a preheating pipe. The flue gas entering the flue gas exhaust pipe 4 from the boiler 1 is high in temperature. The flue gas waste heat recovery device 2 can preheat the water from the cold water pipe before it enters the preheating pipe. Furthermore, a 1# tank 7 is provided at the end of the preheating pipe, a 1# first water supply pipe 8 connected to the solar heating device 3 is provided on the 1# tank 7, a second water supply pipe 9 is provided on the solar heating device 3, a 2# tank 10 is provided at the end of the second water supply pipe 9, a hot water supply pipe 11 connected to the boiler 1 is provided on the 2# tank 10, a water vapor separation device 12 connected to the 2# tank 10 and the 1# tank 7 is provided between the 2# tank 10 and the 1# tank 7, the water vapor separation device 12 includes a tank body 121, two steam inlet branches 122 respectively connected to the 1# tank 7 and the 2# tank 10 are provided at both ends of the tank body 121, an exhaust pipe 123 is provided at the top of the tank body 121, and two condensate return pipes 124 respectively connected to the 1# tank 7 and the 2# tank 10 are provided at the bottom of the tank body 121.

[0021] Specifically, tank 1# 7 is used to store preheated water. The amount of water entering the solar heating device 3 is controlled through valve control and other means to complete heat exchange. After being heated by the solar heat collecting tube, the water enters tank 2# 10 along the conveying path of the second water supply pipe 9. Tank 2# 10 then supplies hot water to the steam boiler 1. Because tank 2# 10 can centrally store a large volume of hot water and directly receive hot water heated by the solar heating device 3, it can meet the supply and demand balance of hot water, which is beneficial to ensuring the production efficiency of the workshop. Moreover, this method of preheating followed by solar heating significantly reduces gas consumption by approximately 30%, which can significantly reduce gas supply costs. Furthermore, the water vapor separation device 12 provided by this equipment simultaneously separates and processes water vapor in tanks 1# 7 and 2# 10, which is highly practical and has a high utilization rate.

[0022] In order to improve the combined performance of the water vapor separation device 12 with the 1# tank 7 and the 2# tank 10, and taking into account the temperature difference inside the two tanks, the steam inlet branch pipe 122 provided by the utility model includes a branch pipe body 1221, one end of the branch pipe body 1221 is provided with a connecting flange 1222, and the other end of the branch pipe body 1221 is provided with a flange end cover 1223. The interior of the steam inlet branch pipe 122 is provided with a T-shaped insulation sleeve 125 nested with the branch pipe body 1221 and the flange end cover 1223. The two ends of the tank body 121 are flange-connected to the flange end cover 1223 and the end of the T-shaped insulation sleeve 125. The outer side of the tank body 121 is provided with a plurality of condensing plates 126 distributed in a circular array along its center. In this way, while the tank body 121 establishes a connection with the 1# tank 7 and the 2# tank 10 through the air intake branch pipe, two T-shaped insulation sleeves 125 are used to isolate the heat transfer from the two tanks to the tank body 121 of the water vapor separation device 12, and the tank body 121 itself can play a condensing role through the condensing sheet 126, so that the water vapor entering the tank body 121 is condensed by solid conduction, thereby achieving the purpose of water vapor separation, and the separated gas is discharged from the direction of the exhaust pipe 123.

[0023] To enhance the relative independence of the communication paths between the water vapor separation device 12 and tank 1# 7 and the communication paths between the water vapor separation device 12 and tank 2# 10, the present invention provides a partition 127 in the middle of the tank body 121. The partition 127 has an inverted U-shaped longitudinal cross-section and is open to the outside world. The partition 127 divides the interior of the tank body 121 into two left and right chambers. The top of the partition 127 is provided with a conical opening, within which is a valve core 128 rotatably engaged. The valve core 128 is provided with two sets of exhaust holes 1281 that communicate with the left and right chambers of the tank body 121. The partition 127 separates the chambers communicating with tanks 1# 7 and 2# 10, reducing the impact of water vapor at different temperatures. The partition 127 also increases the area within which the device performs its condensation function, facilitating water vapor separation. The gas generated after separation enters the valve core 128 through the exhaust holes 1281 and then through the valve core 128 into the same exhaust pipe 123.

[0024] Furthermore, valve core 128 includes a cylindrical section 1282 and a tapered section 1283. The outer side of cylindrical section 1282 is provided with a threaded pair that mates with exhaust pipe 123. A hexagonal hole 1284 is provided on the upper half of the inner wall of cylindrical section 1282. A partition 1285 is provided in the center of tapered section 1283. A top plate 1286 is provided on top of partition 1285. Top plate 1286 is provided with two through holes 1287 that communicate with the left and right chambers of tank body 121. In this way, the condensation path of tank 1# 7 and tank 2# 10 is further separated from the water vapor separation device 12, achieving dual purposes. Furthermore, by rotating the hexagonal hole 1284 with a hexagonal wrench, valve core 128 can be quickly tightened onto partition 127, establishing a stable assembly relationship with tank body 121.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A steam boiler equipped with a solar water heating energy-saving system, comprising a boiler, a flue gas waste heat recovery device, and a solar heating device, wherein the flue gas waste heat recovery device is connected to the boiler via a flue gas exhaust pipe, and the flue gas waste heat recovery device is provided with a cold water pipe and a preheating pipe, characterized in that: A 1# tank is provided at the end of the preheating tube, a first water supply pipe connected to the solar heating device is provided on the 1# tank, a second water supply pipe is provided on the solar heating device, a 2# tank is provided at the end of the second water supply pipe, a hot water supply pipe connected to the boiler is provided on the 2# tank, a water vapor separation device connected to the 1# tank and the 2# tank is provided between the 2# tank and the 1# tank, the water vapor separation device includes a tank body, two steam inlet branches respectively connected to the 1# tank and the 2# tank are provided at both ends of the tank body, an exhaust pipe is provided on the top of the tank body, and two condensate return pipes respectively connected to the 1# tank and the 2# tank are provided at the bottom of the tank body.

2. A steam boiler equipped with a solar water heating energy-saving system according to claim 1, characterized in that: The steam inlet branch pipe includes a branch pipe body, one end of the branch pipe body is provided with a connecting flange, and the other end of the branch pipe body is provided with a flange end cover. A T-shaped insulation sleeve is provided inside the steam inlet branch pipe and is nested with the branch pipe body and the flange end cover. The two ends of the tank body are flange-connected to the flange end cover and the end of the T-shaped insulation sleeve. The outside of the tank body is provided with a plurality of condensing plates distributed in a circular array along its center.

3. A steam boiler equipped with a solar water heating energy-saving system according to claim 2, characterized in that: A partition is provided in the middle of the tank body, and the longitudinal section of the partition is an inverted U-shape and is connected to the outside world. The partition divides the interior of the tank body into two left and right chambers. The top of the partition is provided with a conical opening, and a valve core is provided in the conical opening to rotate with it. The valve core is provided with two groups of exhaust holes that are connected to the left and right chambers of the tank body.

4. A steam boiler equipped with a solar water heating energy-saving system according to claim 3, characterized in that: The valve core includes a cylindrical section and a conical section. The outer side of the cylindrical section is provided with a threaded pair that cooperates with the exhaust pipe. The cylindrical section is provided with a hexagonal hole on the upper half of its inner wall. A partition is provided in the center of the conical section. A top plate is provided on the top of the partition. The top plate is provided with two through holes that communicate with the left and right chambers of the tank body.

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