Waste heat utilization system of steam boiler

Abstract

The utility model relates to the technical field of steam boiler equipment, and discloses a waste heat utilization system of a steam boiler, which is arranged on the right side of a steam boiler body, the right side of the steam boiler body is fixedly connected with a boiler blow-off pipe I, and the rear end of the boiler blow-off pipe I is fixedly connected with a heating medium inlet of a heat exchanger. According to the waste heat utilization system of the steam boiler, a steam boiler body exchanges heat with recycled steam of a waste heat steam pipe I through a boiler blow-off pipe II, formed waste heat steam enters a filter, a filtered mixture enters a hot water storage tank through a connecting pipe, the boiler body generates 0.9 MPa high-pressure steam, and one part of the steam enters the hot water storage tank through a high-pressure steam pipe to be heated; one part of steam enters the steam jet pump through a branch pipe, low-pressure steam in the hot water storage tank is input into the steam jet pump through a steam outlet pipe, the steam jet pump treats the high-pressure steam and the low-pressure steam, steam with the pressure ranging from 0.3 MPa to 0.4 MPa is generated and input into the steam separator cylinder, the steam with the needed pressure is provided for a user, and the purpose of recycling system user steam waste heat and steam boiler waste heat is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bath bags, in particular to a waste heat utilization system of a steam boiler. Background Art

[0002] In industrial production, steam boilers are widely used as important energy supply equipment. Steam boilers can be divided into electric steam boilers, oil-fired steam boilers, gas-fired steam boilers, etc. according to fuel; steam boilers can be divided into manual combustion steam boilers and fully automatic chain combustion steam boilers according to fuel supply method; according to structure, they can be divided into vertical steam boilers and horizontal steam boilers.

[0003] However, traditional steam boilers have many problems during operation. The steam pressure generated by steam boilers is usually high, while the actual user demand for steam pressure is often low, which leads to the need for pressure reduction during steam transportation. The pressure reduction process will cause energy loss. The steam boiler will generate a large amount of waste heat during operation. The waste heat cannot be effectively utilized, which will increase energy consumption. At the same time, the waste heat of steam input to the user end cannot be utilized, resulting in energy waste. For this reason, a waste heat utilization system of a steam boiler is proposed. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a waste heat utilization system of a steam boiler, which can effectively solve the problems in the prior art.

[0005] The technical solution adopted by the utility model is: a waste heat utilization system of a steam boiler is arranged on the right side of the steam boiler body, the right side of the steam boiler body is fixedly connected with a boiler drain pipe 1, the rear end of the boiler drain pipe 1 is fixedly connected to the heat medium inlet of the heat exchanger, the heat medium outlet of the heat exchanger is fixedly connected to the boiler drain pipe 2, the refrigerant inlet of the heat exchanger is fixedly connected with the waste heat steam pipe 1, the refrigerant outlet of the heat exchanger is fixedly connected with the waste heat steam pipe 2, the right end of the waste heat steam pipe 2 is fixedly connected with the filter input end, and the filter output end is fixedly connected with a connecting pipe, a hot water storage tank is arranged on the right side of the heat exchanger, the upper end of the steam boiler body is fixedly connected with a high-pressure steam pipe, the outer side of the high-pressure steam pipe is fixedly connected with a branch pipe, the upper end of the hot water storage tank is fixedly connected with a low-pressure steam pipe 1, and a steam jet pump is arranged on the right side of the hot water storage tank, the output end of the steam jet pump is fixedly connected with the low-pressure steam pipe 2, and the lower end of the low-pressure steam pipe 2 is fixedly connected with a steam distributor cylinder;

[0006] The hot water storage tank includes an outer shell, a steam inlet pipe, a mixture inlet pipe, a steam outlet pipe, an inner shell, a frame, an insulation layer, a motor and a mixing paddle. The front end of the outer shell is fixedly connected to the steam inlet pipe, the right side of the outer shell is fixedly connected to the mixture inlet pipe, the upper end of the outer shell is fixedly connected to the steam outlet pipe, the inner shell is provided inside the outer shell, the inner wall of the outer shell is fixedly connected to the frame, the inner shell is provided inside the outer shell, the motor is fixedly connected to the bottom of the outer shell, and the mixing paddle is fixedly connected to the output end of the motor.

[0007] Preferably, the second boiler blowdown pipe and the second waste heat steam pipe are interconnected, and the first waste heat steam pipe inputs steam recovered from the user end.

[0008] Through the above technical solution, the boiler sewage pipe 2 and the waste heat steam pipe 2 are interconnected, the steam boiler body outputs sewage steam through the boiler sewage pipe 2, and heat exchange is performed on the steam recovered from the user end input by the waste heat steam pipe 1. After the heat exchange, the sewage steam passes through the boiler sewage pipe 2 and is mixed with the recovered steam in the waste heat steam pipe 2 to form waste heat steam, thereby realizing the recycling of steam and reducing energy consumption.

[0009] Preferably, the filter adopts a basket-type filter device, and a one-way valve is provided on the outside of the connecting pipe.

[0010] Through the above technical solution, the filter adopts a basket-type filter device, which can effectively filter out impurities in the waste heat steam and ensure the normal operation of the system. The filtered waste heat steam is input into the hot water storage tank through the connecting pipe. A one-way valve is provided on the outside of the connecting pipe to prevent the backflow of the fluid and improve the stability and safety of the system.

[0011] Preferably, the connecting pipe is fixedly connected to the mixture inlet pipe, and the steam inlet pipe is fixedly connected to the high-pressure steam pipe.

[0012] Through the above technical solution, the high-pressure steam generated by the steam boiler body is injected into the hot water storage tank through the high-pressure steam pipe, thereby improving the heating efficiency of the hot water storage tank.

[0013] Preferably, the skeleton is arranged so as to be fixedly connected to the outer shell and the inner shell, and the thermal insulation layer is filled in the skeleton.

[0014] Through the above technical solution, the skeleton is arranged between the outer shell and the inner shell and fixedly connected, thereby enhancing the structural strength of the hot water storage tank so that it can withstand internal pressure and external forces. The insulation layer is filled in the skeleton, effectively reducing heat loss and improving the thermal insulation performance of the hot water storage tank.

[0015] Preferably, the insulation layer is made of polyurethane foam material, and the low-pressure steam pipe 1 is fixedly connected to the steam outlet pipe.

[0016] Through the above technical solution, the insulation layer is made of polyurethane foam material, which has good thermal insulation effect and can maintain the temperature in the hot water storage tank for a long time. The motor drives the mixing paddle to stir and promote heat exchange. The low-pressure steam pipe is fixedly connected to the steam outlet pipe, so that the low-pressure steam generated in the hot water storage tank can be discharged smoothly, providing a steam source for the subsequent steam jet pump.

[0017] Preferably, a lower end of the low-pressure steam pipe is fixedly connected to an upper input end of a steam jet pump, and a right end of the branch pipe is fixedly connected to a left input end of the steam jet pump.

[0018] Through the above technical solution, the steam jet pump can make full use of steam of different pressures, generate steam of appropriate pressure, and transport it to the steam distributor cylinder through the low-pressure steam pipe 2. The steam distributor cylinder is then connected to each user to provide the user with steam of the required pressure, thereby achieving the purpose of recovering the waste heat of the system users' steam and the waste heat of the steam boiler.

[0019] Compared with the prior art, the present invention provides a waste heat utilization system for a steam boiler, which has the following beneficial effects:

[0020] 1. The waste heat utilization system of the steam boiler, the steam boiler body outputs waste steam through the boiler waste pipe 2, and performs heat exchange on the steam recovered from the user end input by the waste heat steam pipe 1. After the heat exchange, the waste steam passes through the boiler waste pipe 2 and is mixed with the recovered steam in the waste heat steam pipe 2 to form waste heat steam. The steam-water mixture in the waste heat steam pipe 2 enters the filter for filtration. The filtered mixture enters the mixture inlet pipe of the hot water storage tank through the connecting pipe. The steam boiler body generates high-pressure steam with a pressure of 0.9MPa during operation. A part of the high-pressure steam enters the steam inlet pipe of the hot water storage tank through the high-pressure steam pipe to heat the hot water storage tank. In the hot water storage tank, the motor at the bottom of the shell drives the mixing paddle Stirring promotes heat exchange. The low-pressure steam generated in the hot water storage tank is discharged through the steam outlet pipe and the low-pressure steam pipe 1. The lower end of the low-pressure steam pipe delivers a part of the low-pressure steam to the upper input end of the steam jet pump. At the same time, the branch pipe outside the high-pressure steam pipe delivers another part of the high-pressure steam to the left input end of the steam jet pump. The steam jet pump processes the high-pressure steam from the branch pipe and the low-pressure steam from the low-pressure steam pipe 1 to generate steam with a pressure of 0.3-0.4MPa, and delivers it to the steam distributor cylinder through the low-pressure steam pipe 2. Finally, the steam distributor cylinder is connected to each user to provide the user with steam of the required pressure, thereby realizing the purpose of recovering the waste heat of the system users' steam and the waste heat of the steam boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 ;

[0022] Figure 2This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model Figure 3 ;

[0024] Figure 4 This is a schematic diagram of the split structure of the hot water storage tank of the utility model Figure 1 ;

[0025] Figure 5 This is a schematic diagram of the split structure of the hot water storage tank of the utility model Figure 2 .

[0026] Among them: 1. Steam boiler body; 2. Boiler drain pipe 1; 3. Heat exchanger; 4. Boiler drain pipe 2; 5. Waste heat steam pipe 1; 6. Waste heat steam pipe 2; 7. Filter; 8. Connecting pipe; 9. One-way valve; 10. Hot water storage tank; 1001. Outer shell; 1002. Steam inlet pipe; 1003. Mixture inlet pipe; 1004. Steam outlet pipe; 1005. Inner shell; 1006. Frame; 1007. Insulation layer; 1008. Motor; 1009. Mixing paddle; 11. High-pressure steam pipe; 12. Branch pipe; 13. Low-pressure steam pipe 1; 14. Steam jet pump; 15. Low-pressure steam pipe 2; 16. Steam distributor cylinder. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example 1: Figure 1-5As shown, a waste heat utilization system of a steam boiler provided by the present invention is arranged on the right side of a steam boiler body 1, a boiler drain pipe 2 is fixedly connected to the right side of the steam boiler body 1, the rear end of the boiler drain pipe 2 is fixedly connected to the heat medium inlet of a heat exchanger 3, the heat medium outlet of the heat exchanger 3 is fixedly connected to the boiler drain pipe 2 4, the refrigerant inlet of the heat exchanger 3 is fixedly connected to a waste heat steam pipe 5, the refrigerant outlet of the heat exchanger 3 is fixedly connected to a waste heat steam pipe 2 6, the right end of the waste heat steam pipe 2 6 is fixedly connected to the input end of a filter 7, the output end of the filter 7 is fixedly connected to a connecting pipe 8, a hot water storage tank 10 is arranged on the right side of the heat exchanger 3, a high-pressure steam pipe 11 is fixedly connected to the upper end of the steam boiler body 1, a branch pipe 12 is fixedly connected to the outside of the high-pressure steam pipe 11, a low-pressure steam pipe 13 is fixedly connected to the upper end of the hot water storage tank 10, a steam jet pump 14 is arranged on the right side of the hot water storage tank 10, the output end of the steam jet pump 14 is fixedly connected to a low-pressure steam pipe 2 15, and the lower end of the low-pressure steam pipe 2 15 is fixedly connected to a steam distributor cylinder 16;

[0029] The hot water storage tank 10 includes an outer shell 1001, a steam inlet pipe 1002, a mixture inlet pipe 1003, a steam outlet pipe 1004, an inner shell 1005, a skeleton 1006, an insulation layer 1007, a motor 1008 and a mixing paddle 1009. The front end of the outer shell 1001 is fixedly connected to the steam inlet pipe 1002, the right side of the outer shell 1001 is fixedly connected to the mixture inlet pipe 1003, the upper end of the outer shell 1001 is fixedly connected to the steam outlet pipe 1004, the inner shell 1005 is provided inside the outer shell 1001, the inner wall of the outer shell 1001 is fixedly connected to the skeleton 1006, the inner shell 1001 is provided inside the outer shell 1001, the insulation layer 1007 is provided inside the outer shell 1001, the bottom of the outer shell 1001 is fixedly connected to the motor 1008, and the output end of the motor 1008 is fixedly connected to the mixing paddle 1009.

[0030] Specifically, the boiler blowdown pipe 2 4 and the waste heat steam pipe 2 6 are interconnected, and the waste heat steam pipe 1 5 inputs steam recovered from the user end. Advantageously, the interconnected boiler blowdown pipe 2 4 and the waste heat steam pipe 2 6 allow the steam boiler body 1 to output blowdown steam through the boiler blowdown pipe 2 4 and perform heat exchange with the steam recovered from the user end input through the waste heat steam pipe 1 5. After the heat exchange, the blowdown steam passes through the boiler blowdown pipe 2 4 and is mixed with the recovered steam in the waste heat steam pipe 2 6 to form waste heat steam, thus achieving steam recycling and reducing energy consumption.

[0031] Specifically, filter 7 is a basket-type filter device, and a one-way valve 9 is provided on the outside of connecting pipe 8. The advantage is that the basket-type filter device can effectively filter out impurities in the waste heat steam, ensuring the normal operation of the system. The filtered waste heat steam is input into the hot water storage tank 10 through connecting pipe 8. The one-way valve 9 is provided on the outside of connecting pipe 8 to prevent backflow of the fluid, thereby improving the stability and safety of the system.

[0032] Example 2: Figure 2-5 As shown, as an improvement to the previous embodiment.

[0033] Specifically, the connecting pipe 8 is fixedly connected to the mixture inlet pipe 1003, and the steam inlet pipe 1002 is fixedly connected to the high-pressure steam pipe 11. Advantageously, the high-pressure steam generated by the steam boiler body 1 is injected into the hot water storage tank 10 through the high-pressure steam pipe 11, thereby improving the heating efficiency of the hot water storage tank 10.

[0034] Specifically, the frame 1006 is disposed between the outer shell 1001 and the inner shell 1005 and fixedly connected, and the thermal insulation layer 1007 is filled within the frame 1006. Advantageously, the frame 1006 is disposed between the outer shell 1001 and the inner shell 1005 and fixedly connected, thereby enhancing the structural strength of the hot water storage tank 10, enabling it to withstand internal pressure and external forces, and the thermal insulation layer 1007 is filled within the frame 1006, effectively reducing heat loss and improving the thermal insulation performance of the hot water storage tank 10.

[0035] Specifically, the insulation layer 1007 is made of polyurethane foam, and the low-pressure steam pipe 13 is fixedly connected to the steam outlet pipe 1004. Advantageously, the insulation layer 1007, made of polyurethane foam, has excellent thermal insulation properties, maintaining the temperature within the hot water storage tank 10 for extended periods. The motor 1008 drives the mixing paddle 1009 to stir, promoting heat exchange. The low-pressure steam pipe 13 is fixedly connected to the steam outlet pipe 1004, allowing the low-pressure steam generated within the hot water storage tank 10 to be smoothly discharged, providing a steam source for the subsequent steam jet pump 14.

[0036] Specifically, the lower end of low-pressure steam pipe 13 is fixedly connected to the upper input of steam jet pump 14, and the right end of branch pipe 12 is fixedly connected to the left input of steam jet pump 14. Advantageously, this allows steam jet pump 14 to fully utilize steam of varying pressures, generating steam of appropriate pressure. This steam is then transported to steam distributor cylinder 16 via low-pressure steam pipe 2 15. Steam distributor cylinder 16 is then connected to each user, providing them with steam at the required pressure, thereby recovering waste heat from system users and the waste heat from the steam boiler.

[0037] Working principle: When in use, the steam boiler body 1 outputs sewage steam through the boiler sewage pipe 24, and performs heat exchange on the steam recovered from the user end input by the waste heat steam pipe 15. After the heat exchange, the sewage steam passes through the boiler sewage pipe 24 and is mixed with the recovered steam in the waste heat steam pipe 26 to form waste heat steam. The steam-water mixture in the waste heat steam pipe 26 enters the filter 7 for filtration, and the filtered mixture enters the mixture inlet pipe 1003 of the hot water storage tank 10 through the connecting pipe 8 (the one-way valve 9 on the outside of the connecting pipe 8 prevents the fluid from flowing back). The steam boiler body 1 generates high-pressure steam with a pressure of 0.9 MPa during operation. A part of the high-pressure steam enters the steam inlet pipe 1002 of the hot water storage tank 10 through the high-pressure steam pipe 11 to heat the hot water storage tank 10. In the hot water storage tank 10, the motor 10 at the bottom of the shell 1001 08 drives the mixing paddle 1009 to stir and promote heat exchange. The low-pressure steam generated in the hot water storage tank 10 is discharged through the steam outlet pipe 1004 and the low-pressure steam pipe 13. The lower end of the low-pressure steam pipe 13 transports a part of the low-pressure steam to the upper input end of the steam jet pump 14. At the same time, the branch pipe 12 outside the high-pressure steam pipe 11 transports another part of the high-pressure steam to the left input end of the steam jet pump 14. The steam jet pump 14 processes the high-pressure steam from the branch pipe 12 and the low-pressure steam from the low-pressure steam pipe 13 to generate steam with a pressure of 0.3-0.4MPa, and transports it to the steam distributor cylinder 16 through the low-pressure steam pipe 15. Finally, the steam distributor cylinder 16 is connected to each user to provide the user with steam of the required pressure, thereby achieving the purpose of recovering the waste heat of the system users' steam and the waste heat of the steam boiler.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat utilization system for a steam boiler, arranged on the right side of a steam boiler body (1), characterized in that: The right side of the steam boiler body (1) is fixedly connected to a boiler drain pipe (2), the rear end of the boiler drain pipe (2) is fixedly connected to the heat medium inlet of the heat exchanger (3), the heat medium outlet of the heat exchanger (3) is fixedly connected to the boiler drain pipe (4), the refrigerant inlet of the heat exchanger (3) is fixedly connected to the waste heat steam pipe (5), the refrigerant outlet of the heat exchanger (3) is fixedly connected to the waste heat steam pipe (6), the right end of the waste heat steam pipe (6) is fixedly connected to the input end of the filter (7), and the output end of the filter (7) is fixedly connected to the connecting pipe (8) A hot water storage tank (10) is provided on the right side of the heat exchanger (3), a high-pressure steam pipe (11) is fixedly connected to the upper end of the steam boiler body (1), a branch pipe (12) is fixedly connected to the outer side of the high-pressure steam pipe (11), a low-pressure steam pipe 1 (13) is fixedly connected to the upper end of the hot water storage tank (10), a steam jet pump (14) is provided on the right side of the hot water storage tank (10), a low-pressure steam pipe 2 (15) is fixedly connected to the output end of the steam jet pump (14), and a steam distributor cylinder (16) is fixedly connected to the lower end of the low-pressure steam pipe 2 (15); The hot water storage tank (10) comprises an outer shell (1001), a steam inlet pipe (1002), a mixture inlet pipe (1003), a steam outlet pipe (1004), an inner shell (1005), a frame (1006), an insulation layer (1007), a motor (1008) and a mixing paddle (1009). The front end of the outer shell (1001) is fixedly connected to the steam inlet pipe (1002), and the right side of the outer shell (1001) is fixedly connected to the mixture inlet pipe (1003). The upper end of the outer shell (1001) is fixedly connected to a steam outlet pipe (1004), an inner shell (1005) is provided inside the outer shell (1001), a skeleton (1006) is fixedly connected to the inner wall of the outer shell (1001), an insulation layer (1007) is provided inside the outer shell (1001), a motor (1008) is fixedly connected to the bottom of the outer shell (1001), and a mixing paddle (1009) is fixedly connected to the output end of the motor (1008).

2. The waste heat utilization system of a steam boiler according to claim 1, characterized in that: The second boiler blowdown pipe (4) and the second waste heat steam pipe (6) are interconnected, and the first boiler blowdown pipe (2) inputs the steam recovered from the user end.

3. The waste heat utilization system of a steam boiler according to claim 1, characterized in that: The filter (7) adopts a basket-type filtering device, and a one-way valve (9) is provided on the outside of the connecting pipe (8).

4. The waste heat utilization system of a steam boiler according to claim 1, characterized in that: The connecting pipe (8) is fixedly connected to the mixture inlet pipe (1003), and the steam inlet pipe (1002) is fixedly connected to the high-pressure steam pipe (11).

5. The waste heat utilization system of a steam boiler according to claim 1, characterized in that: The skeleton (1006) is arranged on the outer shell (1001) and is fixedly connected to the inner shell (1005), and the thermal insulation layer (1007) is filled in the skeleton (1006).

6. The waste heat utilization system of a steam boiler according to claim 1, characterized in that: The thermal insulation layer (1007) is made of polyurethane foam material, and the low-pressure steam pipe (13) is fixedly connected to the steam outlet pipe (1004).

7. The waste heat utilization system of a steam boiler according to claim 1, characterized in that: The lower end of the low-pressure steam pipe (13) is fixedly connected to the upper input end of the steam jet pump (14), and the right end of the branch pipe (12) is fixedly connected to the left input end of the steam jet pump (14).

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