Gas outlet pipeline of waste heat boiler

Abstract

The utility model relates to a gas outlet pipeline of a waste heat boiler, which comprises an inner pipe and an outer pipe sleeved on the outer side of the inner pipe, and a cavity for accommodating water is formed between the inner pipe and the outer pipe. An ash discharge assembly is arranged at one end of the inner pipe; the ash discharging assembly comprises a breather pipe, the breather pipe is communicated with the inner pipe, and the side wall of the breather pipe is communicated with an air inlet pipe; a conical hopper is arranged at the end, away from the inner pipe, of the ventilation pipe, the large-opening end of the conical hopper is communicated with the ventilation pipe, and the small-opening end of the conical hopper is communicated with a collection box. Water in the cavity is heated through heat of waste gas in the inner pipe, smoke residues in the waste gas are reduced through the ash discharging assembly, a large amount of heat energy in the waste gas is effectively utilized, and energy waste is greatly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of heat energy recycling, and in particular to an exhaust pipe of a waste heat boiler. Background Art

[0002] A waste heat boiler is a heating device that uses waste gas and waste liquid generated during the production process to burn to produce steam or hot water. The steam generated can also convert thermal energy into mechanical energy through a steam power device, or convert mechanical energy into electrical energy through a generator.

[0003] During the combustion process of waste gas or waste liquid, a large amount of new waste gas will be generated again in the boiler. The current waste heat boiler mainly discharges these waste gases to the outside through a straight chimney or an exhaust pipe; however, the waste gas generated during combustion usually has a very high temperature. Direct discharge will cause a large amount of heat energy in these waste gases to not be fully utilized, thus wasting the energy in the waste gas. Utility Model Content

[0004] In order to improve the problem that the heat energy of the exhaust gas generated during the combustion process is not fully utilized, thereby causing energy waste, the present application provides an exhaust pipe of a waste heat boiler.

[0005] This application provides a technical solution that adopts the following:

[0006] An exhaust pipe of a waste heat boiler comprises an inner pipe and an outer pipe sleeved on the outer side of the inner pipe, wherein a cavity for accommodating water is formed between the inner pipe and the outer pipe.

[0007] By adopting the above technical solution, when the exhaust gas generated by combustion passes through the inner tube, the heat it carries heats the water in the outer tube. In this way, the present application can effectively utilize the large amount of heat energy in the exhaust gas and greatly reduce energy waste.

[0008] In a specific feasible implementation scheme, an ash removal assembly is provided at one end of the inner tube; the ash removal assembly includes a ventilation pipe, the ventilation pipe is communicated with the inner tube, and an air inlet pipe is connected to the side wall of the ventilation pipe; a conical bucket is provided at one end of the ventilation pipe away from the inner tube, the end of the conical bucket with a larger opening is communicated with the ventilation pipe, and the end with a smaller opening is connected to a collection box.

[0009] In a specific possible implementation manner, the air inlet pipe is in an arc shape, and the inner wall of the air inlet pipe is in contact with the outer wall of the ventilation pipe.

[0010] By adopting the above technical solution, since the exhaust gas generated during combustion in the boiler often contains some flue gas residues, i.e., tiny particles, dust, etc., when the exhaust gas passes through the inner tube, the flue gas residues carried by the exhaust gas will adhere to the inner wall of the inner tube; in the long run, when the flue gas residues accumulate to a certain extent, the efficiency of heat energy exchange between the exhaust gas and the inner tube will be greatly reduced, thereby affecting the efficiency of recycling the waste heat of the exhaust gas;

[0011] By setting up the ash removal component, the exhaust gas will first enter the ventilation pipe through the arc-shaped air intake pipe before entering the inner pipe. Since the smoke residue in the exhaust gas is heavier than air, these smoke residues will make a spiral motion along the ventilation pipe and the inner wall of the conical bucket under inertia, and finally fall into the collection box; in this way, the ash removal component can filter the gas in the inner pipe once, effectively reducing the content of smoke residue in the exhaust gas, and improving the efficiency of heat energy exchange between the exhaust gas and the inner pipe to a certain extent, thereby improving the efficiency of recycling the waste heat of the exhaust gas.

[0012] In a specific possible implementation manner, the conical bucket and the ventilation pipe are detachably connected.

[0013] By adopting the above technical solution, the detachable connection between the conical bucket and the ventilation pipe greatly improves the convenience of cleaning the smoke residue on the inner wall of the conical bucket.

[0014] In a specific possible implementation manner, a spiral heat-conducting sheet is sleeved on the outer wall of the inner tube, and the spiral heat-conducting sheet is located in the cavity.

[0015] By adopting the above technical solution, the provision of the spiral heat conductive sheet helps to evenly heat the water in the cavity, while increasing the contact area between the water body and the inner tube, thereby greatly improving the heating efficiency of the water body when the exhaust gas is reused.

[0016] In a specific possible implementation manner, a plurality of first baffles are provided in the inner tube along the length direction of the inner tube, and a plurality of second baffles are provided in the inner tube along the length direction of the inner tube, and the first baffles and the second baffles are arranged alternately.

[0017] In a specific possible implementation manner, both the first baffle plate and the second baffle plate are inclined toward a side close to the ventilation pipe.

[0018] By adopting the above technical solution, after the exhaust gas enters the inner tube, it will first gather in the corner between the first first baffle and the inner wall of the inner tube, and then after the corner is filled with exhaust gas, it will slowly gather in the corner between the first second baffle and the inner wall of the inner tube, and finally overflow and gather in the corner between the second first baffle and the inner wall of the inner tube, and the above steps are repeated until the exhaust gas reaches the outlet end of the inner tube; thus, the setting of the first baffle and the second baffle greatly slows down the circulation rate of the exhaust gas in the inner tube, prolongs the heating time of the exhaust gas on the water in the cavity, thereby effectively improving the reuse efficiency of the exhaust gas.

[0019] In a specific possible implementation manner, a solenoid valve is provided at one end of the outer side of the inner tube away from the ventilation tube, and a temperature sensor is provided in the inner tube, and the temperature sensor is electrically connected to the solenoid valve.

[0020] By adopting the above technical solution, when the temperature obtained by the temperature sensor reaches a certain value, that is, most of the heat in the exhaust gas has been absorbed, the solenoid valve is controlled to open to discharge the exhaust gas after the heat has been effectively utilized; thereby, it helps to intelligently control the discharge of exhaust gas in the inner pipe, reduces the intervention of manual start and stop, and improves convenience; at the same time, it greatly improves the utilization rate of the exhaust gas heat in the inner pipe.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. By utilizing the heat of the exhaust gas in the inner tube to heat the water in the cavity, the large amount of heat energy in the exhaust gas is effectively utilized, greatly reducing energy waste;

[0023] 2. The setting of the ash discharge component realizes the filtration of the exhaust gas in the inner tube, effectively reduces the smoke residue in the exhaust gas, improves the heat energy exchange efficiency between the exhaust gas and the inner tube, and thus improves the reuse efficiency of the waste heat of the exhaust gas;

[0024] 3. The setting of the first baffle and the second baffle greatly slows down the flow rate of the exhaust gas in the inner tube, prolongs the heating time of the exhaust gas on the water in the cavity, thereby effectively improving the reuse efficiency of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front view of an exhaust pipe of a waste heat boiler according to an embodiment of the present application.

[0026] Figure 2 It is a cross-sectional view of an exhaust pipe of a waste heat boiler according to an embodiment of the present application.

[0027] Explanation of the reference numerals: 01; cavity; 1. inner tube; 11. spiral heat conductive plate; 12. first baffle; 13. second baffle; 14. temperature sensor; 15. solenoid valve; 2. outer tube; 21. water inlet pipe; 22. water outlet pipe; 3. ash discharge assembly; 31. ventilation pipe; 32. air inlet pipe; 33. conical bucket; 34. collection box; 4. water stop valve; 5. end cover. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0029] An embodiment of the present application discloses an air outlet pipe of a waste heat boiler.

[0030] Reference Figure 1 and Figure 2 An exhaust pipe of a waste heat boiler comprises an inner pipe 1, an outer pipe 2 and an ash discharge assembly 3. The air inlet end of the inner pipe 1 is communicated with the exhaust gas discharge port in the waste heat boiler, the outer pipe 2 is sleeved on the outer side of the inner pipe 1, and a cavity 01 for accommodating a water body waiting to be heated is formed between the inner pipe 1 and the outer pipe 2; one end of the outer pipe 2 is provided with an inlet pipe 21 for allowing the liquid to be heated to enter the outer pipe 2, and the other end is provided with an outlet pipe 22 for allowing the heated liquid to be discharged from the outer pipe 2, and the inlet pipe 21 and the outlet pipe 22 are both connected with the outer pipe 2; a water stop valve 4 for controlling the water outlet is provided on the outlet pipe 22, and an end cover 5 for sealing the opening of the inlet pipe 21 is provided at the opening of the inlet pipe 21, and the end cover 5 is threadedly matched with the inlet pipe 21.

[0031] Reference Figure 1 and Figure 2 , an ash discharge assembly 3 is provided at one end of the inner tube 1; the ash discharge assembly 3 includes a ventilation pipe 31, an air intake pipe 32, a conical bucket 33 and a collection box 34; the ventilation pipe 31 is connected to the inner tube 1, and the air intake pipe 32 is circularly wrapped around the outer wall of the ventilation pipe 31 and the inner wall of the air intake pipe 32 is in contact with the outer wall of the ventilation pipe 31; the end of the conical bucket 33 with a larger opening is connected to the end of the ventilation pipe 31 away from the inner tube 1 (that is, the conical bucket 33 is connected to the outer tube 2 through the ventilation pipe 31), and the conical bucket 33 of this embodiment is detachably connected to the ventilation pipe 31 through a thread; the collection box 34 of this embodiment is fixedly connected to the end of the conical bucket 33 away from the ventilation pipe 31 and the end of the conical bucket 33 with a smaller opening is inserted into the collection box 34; thereby, it is greatly facilitated to clean the flue gas residues in the conical bucket 33 and the collection box 34.

[0032] Reference Figure 2, a spiral heat conductive sheet 11 is sleeved on the outer wall of the inner tube 1 and the spiral heat conductive sheet 11 is located in the cavity 01. The spiral heat conductive sheet 11 of this embodiment includes a metal heat conductive sheet and a non-metal heat conductive sheet. A plurality of first baffles 12 are provided in the inner tube 1 along the length direction of the inner tube 1, and a plurality of second baffles 13 are provided in the inner tube 1 along the length direction of the inner tube 1. The first baffles 12 and the second baffles 13 of this embodiment are staggered, and the first baffles 12 and the second baffles 13 are both inclined to the side close to the ventilation pipe 31 (that is, the first baffles 12 and the second baffles 13 form an angle with the inner side wall of the inner tube 1, and the angle close to the ventilation pipe 31 is an acute angle); in order to better slow down the rate at which the exhaust gas passes through the inner tube 1, three of the side walls of the first baffle 12 and the second baffle 13 are in contact with the inner side wall of the inner tube 1.

[0033] Reference Figure 2 A solenoid valve 15 is provided at one end of the outer side of the inner tube 1 away from the ventilation pipe 31, and the default state is closed. A temperature sensor 14 is provided in the inner tube 1, and the temperature sensor 14 is electrically connected to the solenoid valve 15; therefore, when the temperature of the exhaust gas in the inner tube 1 drops to a certain value, the solenoid valve 15 is controlled to open and the exhaust gas whose heat has been fully utilized is discharged.

[0034] The implementation principle of the exhaust pipe of a waste heat boiler in an embodiment of the present application is as follows: the secondary exhaust gas generated after the combustion of exhaust gas or waste liquid in the waste heat boiler first enters the ventilation pipe 31 through the arc-shaped air inlet pipe 32, and the smoke residue in the exhaust gas makes a spiral motion along the inner wall of the ventilation pipe 31 and the conical bucket 33 due to inertia until it falls into the collection box 34, and the filtered exhaust gas enters the inner tube 1 through the ventilation pipe 31, and slowly fills the inner tube 1 under the obstruction of a plurality of first baffles 12 and a plurality of second baffles 13, and the exhaust gas with a higher temperature exchanges heat with the water in the cavity 01 through the tube wall of the inner tube 1 and the spiral heat conductive plate 11; when the temperature value obtained in the temperature sensor 14 drops to a certain value, the solenoid valve 15 is opened, and the solenoid valve 15 is closed after the exhaust gas whose heat has been fully utilized is discharged, and the above steps are repeated again until the heat in all the exhaust gas is effectively utilized.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An exhaust pipe of a waste heat boiler, characterized in that: The invention comprises an inner tube (1) and an outer tube (2) sleeved on the outer side of the inner tube (1), wherein a cavity (01) for containing water is formed between the inner tube (1) and the outer tube (2); an ash removal assembly (3) is provided at one end of the inner tube (1); the ash removal assembly (3) comprises a vent pipe (31), the vent pipe (31) is in communication with the inner tube (1), and an air intake pipe (32) is connected on the side wall of the vent pipe (31); a conical bucket (33) is provided at one end of the vent pipe (31) away from the inner tube (1), the end of the conical bucket (33) with a larger opening is in communication with the vent pipe (31), and the end with a smaller opening is in communication with a collection box (34); the air intake pipe (32) is in an arc shape, and the inner side wall of the air intake pipe (32) is in contact with the outer side wall of the vent pipe (31).

2. The air outlet duct according to claim 1, characterized in that: The conical bucket (33) and the ventilation pipe (31) are detachably connected.

3. The air outlet duct according to claim 1, characterized in that: A spiral heat-conducting sheet (11) is sleeved on the outer wall of the inner tube (1), and the spiral heat-conducting sheet (11) is located in the cavity (01).

4. The air outlet duct according to claim 1, characterized in that: A plurality of first baffles (12) are arranged inside the inner tube (1) along the length direction of the inner tube (1), and a plurality of second baffles (13) are arranged inside the inner tube (1) along the length direction of the inner tube (1), wherein the first baffles (12) and the second baffles (13) are arranged alternately.

5. The air outlet duct according to claim 4, characterized in that: The first baffle plate (12) and the second baffle plate (13) are both inclined toward a side close to the ventilation pipe (31).

6. The air outlet duct according to claim 1, characterized in that: An electromagnetic valve (15) is provided at one end of the outer side of the inner tube (1) away from the ventilation tube (31), and a temperature sensor (14) is provided inside the inner tube (1), and the temperature sensor (14) is electrically connected to the electromagnetic valve (15).

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