Novel steam boiler device

Abstract

The utility model relates to the technical field of steam output, in particular to a novel steam boiler device. Comprising a boiler body and waste heat recovery equipment, the waste heat recovery equipment comprises a flue gas channel and a circulating water channel, and a flue gas outlet of the boiler body is communicated with the flue gas channel of the waste heat recovery equipment. By means of an innovative bypass switching mechanism, a dual heat exchange structure, intelligent monitoring and modular design, the problem that a traditional waste heat recovery device is overhauled and stops production is solved, meanwhile, efficient heat energy recovery, safety protection and operation and maintenance convenience are taken into consideration, and the device has remarkable application value in the field of chemical continuous production.

Description

Technical Field

[0001] This utility model relates to the field of steam production technology, specifically to a novel steam boiler device. Background Technology

[0002] A large amount of steam is required in the production and distillation of 2-chloro-5-chloromethylpyridine. The steam is produced by a steam boiler, and to save energy, the waste heat from the flue gas needs to be recovered. However, when using flue gas waste heat recovery equipment to recover and utilize the waste heat from the flue gas, leaks in the equipment require the boiler to be shut down for maintenance. During this time, steam production ceases, affecting the production and distillation yield of 2-chloro-5-chloromethylpyridine. Therefore, regular leak checks of the flue gas waste heat recovery equipment are necessary.

[0003] Patent document CN216011864U discloses a flue gas waste heat recovery heat exchanger with a leak detection structure, including a flue gas waste heat recovery heat exchanger body, heat conduction pipes, and a control terminal system. Support legs are welded to the four corners of the bottom of the flue gas waste heat recovery heat exchanger body. A heat insulation layer is provided on the inner surface of the flue gas waste heat recovery heat exchanger body. A flue gas inlet is welded to the bottom of one side of the flue gas waste heat recovery heat exchanger body, and a flue gas outlet is welded to the upper end of the other side of the flue gas waste heat recovery heat exchanger body. A water outlet is fixedly connected to the upper end of one side of the flue gas waste heat recovery heat exchanger body, and a water inlet is fixedly connected to the bottom end of the other side of the flue gas waste heat recovery heat exchanger body. The heat conduction pipes are fixedly installed on the flue gas waste heat recovery heat exchanger body. The body is internally connected to the heat pipe, with one bottom end fixedly connected to the water inlet and the other end fixedly connected to the water outlet. An alarm device is installed on the upper part of the side of the flue gas waste heat recovery heat exchanger body near the flue gas outlet. An air pump is installed on the upper part of the other side of the flue gas waste heat recovery heat exchanger body near the flue gas outlet. The air outlet of the air pump passes through the flue gas waste heat recovery heat exchanger body and the heat insulation layer and extends into the interior of the flue gas waste heat recovery heat exchanger body. Thermal imaging detectors are fixedly connected to the center of the flue gas inlet on the outer surface of the flue gas waste heat recovery heat exchanger body. Two air pressure sensors are installed inside the flue gas waste heat recovery heat exchanger body, located at the upper end of the flue gas inlet and the bottom end of the flue gas outlet, respectively. Four thermal imaging detectors are installed around the surface of the main body of the flue gas waste heat recovery heat exchanger, and two pressure sensors are installed inside the main body of the flue gas waste heat recovery heat exchanger. The main body of the flue gas waste heat recovery heat exchanger is monitored in real time by the four thermal imaging detectors and the two pressure sensors. Although the situation can be identified in time when a leak occurs, the flue gas cannot continue to pass through during shutdown maintenance, so the system needs to be shut down for maintenance.

[0004] Therefore, it is necessary to design a new type of steam boiler that can maintain steam production even during leakage, thus ensuring output. Utility Model Content

[0005] The main objective of this invention is to provide a new type of steam boiler device that can effectively recover and utilize the waste heat of flue gas, and can ensure the production of steam even when flue gas leaks.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A novel steam boiler device includes a boiler body and a waste heat recovery device. The waste heat recovery device includes a flue gas passage and a circulating water passage. The flue gas outlet of the boiler body is connected to the flue gas passage of the waste heat recovery device. The circulating inlet pipe and circulating outlet pipe are connected to the circulating water passage and a water tank. A circulating pump is installed on the circulating inlet pipe. The water tank is connected to a softened water pipe. The gas inlet pipe is connected to the gas inlet of the boiler body. The water tank is connected to the water inlet of the boiler body through a water inlet pipe, and a water pump is installed on the water inlet pipe. An inner box is fixed inside the waste heat recovery device. A heat exchange tube passes through the inner box. Both ends of the heat exchange tube are connected to both ends of the flue gas passage. Valves are installed at both ends of the heat exchange tube and the flue gas passage. The circulating inlet pipe is connected to the inner box. The inner box is connected to the inlet of the heat exchanger inside the waste heat recovery device. The outlet of the heat exchanger is connected to the circulating outlet pipe. When the valves at both ends of the heat exchange tube are opened and the valves at both ends of the flue gas passage are closed, the flue gas flows through the heat exchange tube, and the flue gas in the heat exchange tube exchanges heat with the water in the inner box.

[0008] Specifically, the waste heat recovery equipment includes a shell, an inner box, and a heat exchanger fixed inside the shell. The inner box is connected to the inlet of the heat exchanger through a connecting pipe. One end of the shell is fixedly connected to an inlet pipe, and the other end of the shell is fixedly connected to an outlet pipe. The inlet pipe, the interior of the shell, and the outlet pipe constitute a flue gas passage. The inner box, the connecting pipe, and the heat exchanger constitute a circulating water passage. A first valve is installed on the inlet pipe. One end of the inlet pipe is connected to the heat exchanger tube through an upper pipe. A second valve is installed on the upper pipe. A third valve is installed on the outlet pipe. The other end of the outlet pipe is connected to the heat exchanger tube through a lower pipe. A fourth valve is installed on the lower pipe. When the first and third valves are closed, and the second and fourth valves are opened, the flue gas flows through the inlet pipe, the upper pipe, the heat exchanger tube, the lower pipe, and the outlet pipe.

[0009] Specifically, the exhaust pipe and the inlet pipe are arranged opposite to each other.

[0010] Specifically, a pressure sensor is installed on the housing, and the pressure sensor is electrically connected to the display and the power supply.

[0011] Specifically, a ring tube is fixed to the upper end of the shell, and multiple nozzles are fixedly connected to the inner side of the ring tube. Water sprayed from the nozzles can flow up and down the side wall of the shell.

[0012] Specifically, the steam outlet pipe of the boiler body is connected to the steam distribution box.

[0013] Specifically, a flame arrester is installed on the gas inlet pipe.

[0014] Specifically, an insulation layer is provided on the outside of the steam outlet pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. Bypass-type flue gas path switching design: Through the parallel structure of heat exchange tubes and flue gas channels, and with the linkage control of multiple sets of valves, the flue gas can be switched to the heat exchange tube path when the shell of the waste heat recovery equipment is under maintenance. At this time, the boiler body does not need to be shut down, and the flue gas can still exchange heat with the water in the inner tank through the heat exchange tubes, avoiding heat waste.

[0017] 2. Applicable to continuous production scenarios such as 2-chloro-5-chloromethylpyridine, it solves the problem of steam supply interruption caused by the need to shut down the furnace for maintenance of traditional waste heat recovery equipment, and significantly improves production efficiency.

[0018] 3. Flue gas directly exchanges heat with the circulating water channel inside the shell, maximizing heat recovery efficiency. During maintenance, flue gas indirectly exchanges heat with water in the inner tank through heat exchange tubes, ensuring uninterrupted waste heat recovery. The circulating water forms a closed loop through the water tank, inner tank, and heat exchanger. The heated water is pumped into the boiler body, reducing energy consumption for steam production.

[0019] 4. A pressure sensor is installed on the housing, which, together with the display, monitors the sealing performance in real time. By observing pressure changes within the housing, leak points can be identified without stopping the machine, thus shortening the detection time.

[0020] 5. The ring pipe and nozzles can spray water or soapy water along the side wall of the casing, quickly locating leaks through dynamic water flow. Spraying can also be used to cool the equipment, shortening the cooling waiting time before maintenance and improving maintenance efficiency.

[0021] 6. The waste heat recovery equipment adopts a structure in which the inner box, heat exchanger and heat exchange tube are placed inside the shell. It has a high degree of modularity, which facilitates local maintenance or replacement of parts and reduces maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the steam boiler unit.

[0023] Figure 2 This is a cross-sectional view of the waste heat recovery equipment.

[0024] The components in the attached diagram are named as follows: 1. Boiler body, 2. Water inlet pipe, 3. Water pump, 4. Water tank, 5. Softened water pipe, 6. Gas inlet pipe, 7. Steam outlet pipe, 8. Gas distribution box, 9. Waste heat recovery equipment, 10. Circulation outlet pipe, 11. Circulation inlet pipe, 12. Circulation pump, 13. Shell, 14. Flue gas inlet pipe, 15. Flue gas outlet pipe, 16. Upper pipe, 17. Heat exchanger pipe, 18. Lower pipe, 19. Pressure sensor, 20. Ring pipe, 21. Inner box, 22. Connecting pipe, 23. Heat exchanger, 24. First valve, 25. Second valve, 26. Third valve, 27. Fourth valve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1: Refer to Figure 1 and Figure 2 As shown, a novel steam boiler device includes a boiler body 1 and a waste heat recovery device 9.

[0027] The gas inlet pipe 6 is connected to the gas inlet of the boiler body 1, and a flame arrester is installed on the gas inlet pipe 6.

[0028] Water tank 4 is connected to the water inlet of boiler body 1 through water inlet pipe 2. Water pump 3 is installed on water inlet pipe 2. Water tank 4 is connected to softened water pipe 5.

[0029] The steam outlet pipe 7 of the boiler body 1 is connected to the steam distribution box 8. An insulation layer is installed on the outside of the steam outlet pipe 7.

[0030] The waste heat recovery device 9 includes a flue gas passage and a circulating water passage. The flue gas outlet of the boiler body 1 is connected to the flue gas passage of the waste heat recovery device 9.

[0031] The circulation inlet pipe 11 and the circulation outlet pipe 10 are connected to the circulating water channel, and the circulation inlet pipe 11 and the circulation outlet pipe 10 are connected to the water tank 4. A circulation pump 12 is installed on the circulation inlet pipe 11.

[0032] The waste heat recovery equipment 9 has an inner box 21 fixed inside, and the heat exchange tube 17 passes through the inner box 21. The two ends of the heat exchange tube 17 are connected to the two ends of the flue gas passage.

[0033] Valves are installed at both ends of the heat exchange tube 17, and valves are installed at both ends of the flue gas passage.

[0034] The circulation inlet pipe 11 is connected to the inner box 21, and the inner box 21 is connected to the inlet of the heat exchanger 23 in the waste heat recovery equipment 9 through the connecting pipe 22.

[0035] The outlet of heat exchanger 23 is connected to the circulation outlet pipe 10.

[0036] Open the valves at both ends of the heat exchange tube 17 and close the valves at both ends of the flue gas passage. The flue gas flows through the heat exchange tube 17, and the flue gas in the heat exchange tube 17 exchanges heat with the water in the inner box 21.

[0037] Specifically, the waste heat recovery equipment 9 includes a shell 13, an inner box 21, and a heat exchanger 23 fixed inside the shell 13. One end of the shell 13 is fixedly connected to a flue gas inlet pipe 14, and the other end of the shell 13 is fixedly connected to a flue gas outlet pipe 15. The flue gas outlet pipe 15 and the flue gas inlet pipe 14 are arranged opposite to each other.

[0038] The inlet pipe 14, the interior of the shell 13, and the outlet pipe 15 constitute a flue gas passage.

[0039] The inner box 21, the connecting pipe 22 and the heat exchanger 23 constitute a circulating water channel.

[0040] A first valve 24 is installed on the flue pipe 14. One end of the flue pipe 14 is connected to the heat exchange tube 17 through an upper pipe 16. A second valve 25 is installed on the upper pipe 16. A third valve 26 is installed on the flue pipe 15. The other end of the flue pipe 15 is connected to the heat exchange tube 17 through a lower pipe 18. A fourth valve 27 is installed on the lower pipe 18.

[0041] Close the first valve 24 and the third valve 26, and open the second valve 25 and the fourth valve 27. The flue gas flows through the inlet pipe 14, the upper pipe 16, the heat exchange pipe 17, the lower pipe 18 and the outlet pipe 15.

[0042] A pressure sensor 19 is mounted on the housing 13, and the pressure sensor 19 is electrically connected to the display and the power supply.

[0043] Flue gas inside the boiler body 1 is discharged through the inlet pipe 14, the interior of the shell 13, and the outlet pipe 15. Water in the water tank 4 circulates through the circulation inlet pipe 11, the inner tank 21, the connecting pipe 22, the heat exchanger 23, the circulation outlet pipe 10, and the water tank 4. Flue gas and circulating water can exchange heat, thereby increasing the water temperature in the water tank 4 and realizing the recovery of waste heat from the flue gas.

[0044] When the water pump 3 is started to add the heated water from the water tank 4 to the boiler body 1, the steam production efficiency can be improved and the energy consumption can be reduced.

[0045] When checking the sealing performance of the shell 13, close the third valve 26 to pressurize the shell 13, then close the first valve 24 and open the second valve 25 and the fourth valve 27. Flue gas is discharged through the inlet pipe 14, upper pipe 16, heat exchange pipe 17, lower pipe 18, and outlet pipe 15. Then observe the changes in the pressure data inside the shell 13 displayed on the monitor. If the pressure does not change after a set time, it proves that the shell 13 has good sealing performance and there is no flue gas leakage during operation. When checking the sealing performance of the shell 13, it is not necessary to shut down the boiler body 1.

[0046] When the flue gas flows through the heat exchange tube 17, it can transfer heat with the water in the inner box 21, thus avoiding heat waste. When the flue gas flows through the heat exchange tube 17, the shell 13 can be maintained without shutting down the boiler body 1.

[0047] Example 2: Based on Example 1, referring to... Figure 2 As shown, a ring pipe 20 is fixed to the upper end of the housing 13, and multiple nozzles are fixedly connected to the inner side of the ring pipe 20. Water sprayed from the nozzles can flow up and down the side wall of the housing 13.

[0048] By setting up the ring pipe 20 and the nozzle, water can be easily sprayed from the nozzle and flowed down along the side wall of the housing 13, which facilitates the cooling of the housing 13 and allows for quick start of maintenance.

[0049] At the same time, the soapy water is sprayed out from the ring pipe 20, and as the soapy water flows downward on the side wall of the housing 13, it is convenient to find the leaks on the side wall of the housing 13.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel steam boiler apparatus comprising a boiler body (1) and a waste heat recovery device (9) including a flue gas passage and a circulating water passage, a flue gas outlet of the boiler body (1) being communicated with the flue gas passage of the waste heat recovery device (9), characterized in that, The circulating inlet pipe (11) and the circulating outlet pipe (10) are communicated with the circulating water channel, the circulating inlet pipe (11) and the circulating outlet pipe (10) are communicated with the water tank (4), a circulating pump (12) is installed on the circulating inlet pipe (11), the water tank (4) is communicated with the softened water pipe (5), the gas inlet pipe (6) is communicated with the gas inlet of the boiler body (1), the water tank (4) is communicated with the water inlet of the boiler body (1) through the water adding pipe (2), and a water pump (3) is installed on the water adding pipe (2); the inner tank (21) is fixed in the waste heat recovery equipment (9), the heat exchange pipe (17) penetrates the inner tank (21), the two ends of the heat exchange pipe (17) are communicated with the two ends of the flue gas channel, the two ends of the heat exchange pipe (17) are both provided with valves, the two ends of the flue gas channel are both provided with valves, the circulating inlet pipe (11) is communicated with the inner tank (21), the inner tank (21) is communicated with the inlet of the heat exchanger (23) in the waste heat recovery equipment (9), the outlet of the heat exchanger (23) is communicated with the circulating outlet pipe (10), the valves at the two ends of the heat exchange pipe (17) are opened, the valves at the two ends of the flue gas channel are closed, flue gas flows through the heat exchange pipe (17), and the flue gas in the heat exchange pipe (17) exchanges heat with the water in the inner tank (21).

2. A novel steam boiler apparatus as claimed in claim 1, wherein, The waste heat recovery equipment (9) comprises a shell (13), the inner tank (21) and the heat exchanger (23) are fixed in the shell (13), the inner tank (21) is communicated with the inlet of the heat exchanger (23) through a communication pipe (22), one end of the shell (13) is fixedly communicated with a smoke inlet pipe (14), the other end of the shell (13) is fixedly communicated with a smoke outlet pipe (15), the smoke inlet pipe (14), the inside of the shell (13) and the smoke outlet pipe (15) constitute a flue gas channel, the inner tank (21), the communication pipe (22) and the heat exchanger (23) constitute a circulating water channel, a first valve (24) is installed on the smoke inlet pipe (14), the smoke inlet pipe (14) is communicated with one end of the heat exchange pipe (17) through an upper pipe (16), a second valve (25) is installed on the upper pipe (16), a third valve (26) is installed on the smoke outlet pipe (15), the smoke outlet pipe (15) is communicated with the other end of the heat exchange pipe (17) through a lower pipe (18), a fourth valve (27) is installed on the lower pipe (18), the first valve (24) and the third valve (26) are closed, and the second valve (25) and the fourth valve (27) are opened, so that flue gas flows through the smoke inlet pipe (14), the upper pipe (16), the heat exchange pipe (17), the lower pipe (18) and the smoke outlet pipe (15).

3. A novel steam boiler apparatus as claimed in claim 2, wherein, The smoke outlet pipe (15) and the smoke inlet pipe (14) are oppositely arranged.

4. A novel steam boiler apparatus as claimed in claim 2, wherein, A pressure sensor (19) is installed on the shell (13), and the pressure sensor (19) is electrically connected with a display and a power supply.

5. A novel steam boiler apparatus as claimed in claim 2, wherein, An annular pipe (20) is fixed on the upper end of the shell (13), a plurality of nozzles are fixedly and communicatively arranged in the inner side of the annular pipe (20), and water sprayed from the nozzles can flow up and down on the side wall of the shell (13).

6. A novel steam boiler apparatus as claimed in claim 1, wherein, The steam outlet pipe (7) of the boiler body (1) is communicated with the gas distribution tank (8).

7. A novel steam boiler apparatus as claimed in claim 1, wherein, A flame arrester is installed on the gas inlet pipe (6).

8. A novel steam boiler apparatus as claimed in claim 6 wherein, A heat preservation layer is arranged on the outer side of the steam outlet pipe (7).

Images