Condensation type steam boiler

Abstract

The utility model discloses a condensation type steam boiler, and relates to the technical field of design and processing of steam boilers. The device comprises a steam boiler, and a heat energy recovery unit used for recovering and utilizing waste heat is arranged on one side of the steam boiler. A conduit; the gas preheating piece is arranged on one side of the steam boiler, and the guide pipe is communicated with the gas preheating piece; and the liquid preheating piece is arranged on one side of the gas preheating piece, and the guide pipe is communicated with the liquid preheating piece. According to the device, the gas preheating piece and the liquid preheating piece are combined for use, heat of waste gas can be extracted to the maximum extent, waste of waste heat resources is avoided, combustion air entering the boiler and water entering the boiler are preheated, the preheated water improves the thermodynamic cycle efficiency of the boiler, and the energy consumption of the boiler is reduced. And the preheated air is beneficial to more sufficient combustion of the fuel, so that the heat efficiency of the boiler is improved, and the requirements of users are met.

Description

Technical Field

[0001] This utility model relates to the field of steam boiler design and processing technology, specifically a condensing steam boiler. Background Technology

[0002] A condensing steam boiler is a high-efficiency boiler device. Its basic principle is to use a high-efficiency condensing waste heat recovery device to absorb the sensible heat in the high-temperature flue gas discharged from the boiler, so as to improve the boiler's thermal efficiency.

[0003] Existing condensing steam boilers use heat exchange plates to remove the internal temperature of the exhaust gas and preheat the water to be injected into the boiler in order to improve the boiler's thermal efficiency. However, after preheating the water, the exhaust gas produced by the boiler still has a high temperature, and since only the water is heated, the improvement in the thermal efficiency of the steam boiler is not significant enough, which has limitations.

[0004] The reason for this problem is that while the water gains some heat before entering the boiler through the preheating process, the boiler exhaust gas still maintains a relatively high temperature when it is discharged. This means that despite the preheating step, the exhaust gas still contains a large amount of unutilized heat energy. This loss of heat energy is a waste of energy and limits further improvement in the overall thermal efficiency of the boiler. Furthermore, the reliance on waste heat primarily for water preheating, a single heat utilization method, not only limits the boiler's flexibility but also its adaptability to different application scenarios. Therefore, we propose a condensing steam boiler to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a condensing steam boiler, which solves the problem that after preheating the water, the exhaust gas generated by the boiler still has a high temperature, and heating only the water does not significantly improve the thermal efficiency of the steam boiler, thus having limitations.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a condensing steam boiler, comprising a steam boiler, wherein a heat energy recovery unit for recovering and utilizing waste heat is provided on one side of the steam boiler, the heat energy recovery unit comprising;

[0007] catheter;

[0008] A gas preheating element is installed on one side of a steam boiler. The conduit is connected to the gas preheating element, and the gas preheating element heats the clean gas through the exhaust gas inside the steam boiler.

[0009] A liquid preheating element is disposed on one side of the gas preheating element. The conduit is connected to the liquid preheating element, and the liquid preheating element heats the liquid by means of exhaust gas inside the steam boiler.

[0010] Preferably, the steam boiler includes;

[0011] Furnace body;

[0012] A heating element is disposed below the furnace body, and the heating element is used to heat the interior of the furnace body;

[0013] A hot water pipe is installed inside the furnace body. The hot water pipe is heated by a heating element to generate water steam.

[0014] Preferably, the gas preheating element includes;

[0015] The main sealing box, and the conduit is connected to the main sealing box;

[0016] The secondary sealing box is located inside the main sealing box;

[0017] The heat exchange plates are arranged in an equidistant array inside the secondary sealing box.

[0018] Preferably, the gas preheating element further includes;

[0019] The first gas supply pipe is located at the top of the main sealing box, and one end of the first gas supply pipe is connected to the secondary sealing box;

[0020] An air pump is installed at one end of the steam boiler, and the other end of the first air supply pipe is connected to the air pump;

[0021] The second gas supply pipe is located at the top of the main sealing box. One end of the second gas supply pipe is connected to the secondary sealing box, and the other end of the second gas supply pipe is connected to the heating element.

[0022] Preferably, the liquid preheating element includes;

[0023] Heating box;

[0024] A water tank is located at one end of the heating tank;

[0025] A water pump is installed at one end of a water tank, and the water tank is connected to the water pump.

[0026] Preferably, the liquid preheating element further includes;

[0027] The first water pipe is installed at one end of the water pump and is connected to the water pump;

[0028] A heat exchange tube is installed inside the heating box, and one end of the heat exchange tube is connected to the first water pipe;

[0029] The second water pipe is located on one side of the bottom of the heat exchange tube. One end of the second water pipe is connected to the heat exchange tube, and the other end of the second water pipe is connected to the hot water pipe.

[0030] This utility model discloses a condensing steam boiler, which has the following beneficial effects: the device uses a combination of gas preheating and liquid preheating components to extract heat from the exhaust gas to the greatest extent possible, avoiding the waste of waste heat resources. Furthermore, by preheating the combustion air and water entering the boiler, the preheated water improves the efficiency of the boiler's thermal cycle, and the preheated air helps the fuel to burn more completely, thereby improving the boiler's thermal efficiency and meeting the user's needs. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0033] Figure 2 This is a side view of the structure of this utility model;

[0034] Figure 3 This is a schematic diagram of the internal structure of the furnace body of this utility model;

[0035] Figure 4 This is a schematic diagram of the internal structure of the main sealing box of this utility model;

[0036] Figure 5 This is a schematic diagram of the internal structure of the heating box of this utility model.

[0037] In the diagram: 1. Steam boiler; 11. Furnace body; 12. Heating element; 13. Hot water pipe; 2. Heat recovery unit; 21. Conduit; 22. Gas preheating element; 221. Main sealing box; 222. Secondary sealing box; 223. Heat exchange plate; 224. First gas supply pipe; 225. Air pump; 226. Second gas supply pipe; 23. Liquid preheating element; 231. Heating box; 232. Water tank; 233. Water pump; 234. First water pipe; 235. Heat exchange pipe; 236. Second water pipe. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] This application provides a condensing steam boiler, which solves the problem that after preheating the water, the exhaust gas generated by the boiler still has a high temperature, and heating only the water does not significantly improve the thermal efficiency of the steam boiler, thus having limitations.

[0040] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0041] Example 1

[0042] This utility model discloses a condensing steam boiler. According to the appendix... Figure 1 , 2 As shown in Figures 4 and 5, the system includes a steam boiler 1, and a heat recovery unit 2 for recovering and utilizing waste heat is provided on one side of the steam boiler 1. The heat recovery unit 2 includes:

[0043] Catheter 21;

[0044] Gas preheating element 22 is installed on one side of steam boiler 1. Pipe 21 is connected to gas preheating element 22. Gas preheating element 22 heats clean gas through exhaust gas inside steam boiler 1.

[0045] The liquid preheating element 23 is located on one side of the gas preheating element 22. The conduit 21 is connected to the liquid preheating element 23. The liquid preheating element 23 heats the liquid by means of the exhaust gas inside the steam boiler 1.

[0046] The gas preheating component 22 includes: a main sealing box 221, with a conduit 21 communicating with the main sealing box 221; a secondary sealing box 222 disposed inside the main sealing box 221; and heat exchange plates 223 disposed inside the secondary sealing box 222, the heat exchange plates 223 being arranged in an equidistant array. The gas preheating component 22 also includes: a first gas supply pipe 224 disposed at the top of the main sealing box 221, one end of the first gas supply pipe 224 communicating with the secondary sealing box 222; a gas pump 225 disposed at one end of the steam boiler 1, the other end of the first gas supply pipe 224 communicating with the gas pump 225; and a second gas supply pipe 226 disposed at the top of the main sealing box 221, one end of the second gas supply pipe 226 communicating with the secondary sealing box 222. The other end of 226 is connected to the heating element 12. The liquid preheating element 23 includes: a heating box 231; a water tank 232, which is disposed at one end of the heating box 231; a water pump 233, which is disposed at one end of the water tank 232, and the water tank 232 is connected to the water pump 233. The liquid preheating element 23 also includes: a first water pipe 234, which is disposed at one end of the water pump 233 and is connected to the water pump 233; a heat exchange pipe 235, which is disposed inside the heating box 231, and one end of the heat exchange pipe 235 is connected to the first water pipe 234; and a second water pipe 236, which is disposed on one side of the bottom of the heat exchange pipe 235, one end of the second water pipe 236 is connected to the heat exchange pipe 235, and the other end of the second water pipe 236 is connected to the hot water pipe 13.

[0047] In this embodiment, when the device is in use, exhaust gas is generated inside the furnace body 11. The exhaust gas is injected into the main sealing box 221 through the conduit 21. At this time, the air pump 225 is started, and the air pump 225 injects gas into the secondary sealing box 222 through the first air supply pipe 224. Since both the main sealing box 221 and the secondary sealing box 222 are sealed, the two gases will not come into direct contact. However, the exhaust gas can heat the gas blown out by the air pump 225 through the heat exchange plate 223. The heated gas is then transported into the heating element 12 through the second air supply pipe 226, becoming part of the heating element. The combustion-supporting gas 12, after preheating, helps the fuel to burn more completely, thereby improving the thermal efficiency of the boiler. After the exhaust gas is preheated by the gas preheating element 22, it enters the interior of the heating box 231 through the conduit 21. The water pump 233 is started, and the water pump 233 injects water from the water tank 232 into the interior of the heating box 231 through the first water pipe 234. The water comes into contact with the exhaust gas through the heat exchange pipe 235, and the exhaust gas heats the water. The water is then injected into the hot water pipe 13 through the second water pipe 236. The preheated water saves the heating time required, improves the efficiency of the boiler's thermal cycle, and meets the needs of users.

[0048] Example 2

[0049] This utility model discloses a condensing steam boiler. More specifically, based on Embodiment 1, it is provided according to the appendix... Figure 1 ,3 As shown, it includes a steam boiler 1, and a heat energy recovery unit 2 for recovering and utilizing waste heat is provided on one side of the steam boiler 1. The heat energy recovery unit 2 includes:

[0050] Catheter 21;

[0051] Gas preheating element 22 is installed on one side of steam boiler 1. Pipe 21 is connected to gas preheating element 22. Gas preheating element 22 heats clean gas through exhaust gas inside steam boiler 1.

[0052] The liquid preheating element 23 is located on one side of the gas preheating element 22. The conduit 21 is connected to the liquid preheating element 23. The liquid preheating element 23 heats the liquid by means of the exhaust gas inside the steam boiler 1.

[0053] The steam boiler 1 includes: a furnace body 11; a heating element 12 disposed below the furnace body 11, the heating element 12 being used to heat the interior of the furnace body 11; and a hot water pipe 13 disposed inside the furnace body 11, the hot water pipe 13 being heated by the heating element 12 to generate steam.

[0054] In this embodiment, a gas chamber is provided at the top of the furnace body 11, and a water pipe is provided at the top of the hot water pipe 13. The water pipes are arranged in a ring array. A heating element 12 is provided in the middle of the furnace body 11. After the water pipe is heated, the steam generated is discharged through the gas supply pipe at the top of the gas chamber for subsequent use. The heating element 12 heats the water pipe by burning gas. The exhaust gas generated during combustion is discharged through the conduit 21 for subsequent use to meet the user's needs.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A condensing steam boiler comprising a steam boiler (1), characterized in that The steam boiler (1) is provided with a heat energy recovery unit (2) for recovering and utilizing waste heat on one side, the heat energy recovery unit (2) comprises; a conduit (21); a gas preheating device (22) provided on one side of the steam boiler (1), the conduit (21) communicates with the gas preheating device (22), the gas preheating device (22) warms up clean gas by waste gas inside the steam boiler (1); a liquid preheating device (23) provided on one side of the gas preheating device (22), the conduit (21) communicates with the liquid preheating device (23), the liquid preheating device (23) warms up liquid by waste gas inside the steam boiler (1).

2. A condensing steam boiler as claimed in claim 1, characterised in that: The steam boiler (1) comprises; a furnace body (11); a heating device (12) provided below the furnace body (11), the heating device (12) is used for warming up inside the furnace body (11); a hot water pipe (13) provided inside the furnace body (11), the hot water pipe (13) is heated by the heating device (12) to generate water vapor.

3. A condensing type steam boiler according to claim 1, wherein: The gas preheating device (22) comprises; a main sealing box (221), the conduit (21) communicates with the main sealing box (221); a secondary sealing box (222) provided inside the main sealing box (221); heat exchange plates (223) provided inside the secondary sealing box (222), the heat exchange plates (223) are arranged in equidistant array.

4. A condensing type steam boiler according to claim 3, wherein: The gas preheating device (22) further comprises; a first gas conveying pipe (224) provided on the top of the main sealing box (221), one end of the first gas conveying pipe (224) communicates with the secondary sealing box (222); a gas pump (225) provided on one end of the steam boiler (1), the other end of the first gas conveying pipe (224) communicates with the gas pump (225); a second gas conveying pipe (226) provided on the top of the main sealing box (221), one end of the second gas conveying pipe (226) communicates with the secondary sealing box (222), the other end of the second gas conveying pipe (226) communicates with the heating device (12).

5. A condensing type steam boiler according to claim 1, wherein: The liquid preheating device (23) comprises; a heating box (231); a water tank (232) provided on one end of the heating box (231); a water pump (233) provided on one end of the water tank (232), the water tank (232) communicates with the water pump (233).

6. A condensing type steam boiler according to claim 5, wherein: The liquid preheating device (23) further comprises; a first water pipe (234) provided on one end of the water pump (233), the first water pipe (234) communicates with the water pump (233); a heat exchange pipe (235) provided inside the heating box (231), one end of the heat exchange pipe (235) communicates with the first water pipe (234); a second water pipe (236) provided on one side of the bottom of the heat exchange pipe (235), one end of the second water pipe (236) communicates with the heat exchange pipe (235), the other end of the second water pipe (236) communicates with the hot water pipe (13).

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