Reciprocating type steam boiler

Abstract

The utility model relates to the technical field of boilers, in particular to a reciprocating type steam boiler which comprises a boiler body, a smoke exhaust pipe is connected to the top of the back face of the boiler body, a fuel recovery mechanism is arranged at the top of the smoke exhaust pipe, when the smoke exhaust pipe exhausts smoke, the smoke is guided into a separation barrel through a guide pipe, airflow vortex is formed in the separation barrel, and the fuel recovery mechanism recovers fuel in the separation barrel. Under the action of inertia, flue gas dust particles with larger mass in the flue gas are thrown out from the outermost side of the airflow vortex and are in contact with the inner wall of the separation barrel, and the contacted flue gas dust particles lose inertia, fall into the funnel due to self weight, slide into the boiler again through the inclined recovery pipe and are subjected to secondary combustion; and the utilization rate of fuel is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a reciprocating steam boiler. Background Art

[0002] A boiler is an energy conversion device. The energy input into the boiler includes chemical energy and electrical energy in the fuel, while the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy.

[0003] The prior art, such as publication number CN208253555U, provides an environmentally friendly reciprocating coal-fired boiler burner, comprising a combustion chamber and a grate; the grate is a reciprocating multi-section grate; the combustion chamber comprises an auxiliary combustion chamber and a main combustion chamber, the auxiliary combustion chamber is provided with an upper air supply device, the upper air supply device comprises a plurality of air supply modules, at least one row of air inlet pipes is penetrated through the air supply module, a water steam supply device is provided at the bottom of the grate corresponding to the lower part of the main combustion chamber, and the water steam supply device intermittently sprays water steam upwards; the utility model is an environmentally friendly reciprocating coal-fired boiler burner, the upper and lower air supply devices are combined with the reciprocating vibration of the reciprocating grate, so that the air supply airflow is stable, the fuel tumbles thoroughly, the combustion of the fuel is promoted, the heat energy release efficiency is high, the drying and combustion efficiency of the fuel are improved, and the purpose of energy saving and environmental protection is achieved.

[0004] In this scheme, the reciprocating grate is used to scatter, loosen and mix the fuel in the first furnace section in an all-round manner through reciprocating vibration, and then passes through the second furnace section and the third furnace section in turn to achieve thorough tumbling, thereby improving the drying and combustion efficiency of the fuel. However, in reality, some combustible dust particles will still be mixed in the exhaust flue gas, and a large amount of heat will still be retained in the exhaust flue gas, so it is wasteful to discharge it directly. In view of this, we propose a reciprocating steam boiler. Utility Model Content

[0005] The utility model aims to provide a reciprocating steam boiler, which solves the problem that some combustible dust particles are still mixed in the exhausted flue gas, resulting in under-utilization and waste.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A reciprocating steam boiler comprises a boiler, wherein a smoke exhaust pipe is connected to the top of the back side of the boiler, and a fuel recovery mechanism is arranged on the top of the smoke exhaust pipe, wherein the fuel recovery mechanism comprises a guide pipe, wherein the guide pipe is connected to the top of the smoke exhaust pipe, one end of the guide pipe is connected to a separation cylinder, a funnel is connected to the bottom of the separation cylinder, a recovery pipe is connected to the bottom of the funnel, and the recovery pipe is communicated with the interior of the boiler. When the smoke exhaust pipe discharges smoke, the smoke is guided to the interior of the separation cylinder through the guide pipe, and an air flow vortex is formed inside the separation cylinder. Under the action of inertia, smoke dust particles with larger mass in the smoke will be thrown out from the outermost side of the air flow vortex and contact with the inner wall of the separation cylinder. After the contact, the smoke dust particles will lose inertia and fall into the funnel due to their own weight, and then slide back into the boiler through the inclined recovery pipe for secondary combustion, so as to greatly improve the utilization rate of the fuel.

[0008] Preferably, the top of the separation cylinder is connected to an exhaust port, and the lighter gas will be discharged from the exhaust port after air flow vortex separation to prevent dust particles in the flue gas from polluting the surrounding environment. The top of the exhaust port is connected to a ceiling to prevent foreign matter from falling into the interior of the separation cylinder from the exhaust port.

[0009] Preferably, the guide tube and the inner wall of the separation cylinder are arranged to be tangent to an inner circle, so that the flue gas entering the separation cylinder can more easily form an airflow vortex.

[0010] Preferably, the outer wall of the smoke exhaust pipe is provided with a heat recovery mechanism, and the heat recovery mechanism includes an insulation tube, which is sleeved on the outer wall of the smoke exhaust pipe. Wrapping the smoke exhaust pipe with the insulation tube can reduce heat loss during smoke exhaust, thereby forming a relatively constant temperature zone.

[0011] Preferably, an air preheating pipe is provided inside the insulation tube, and the air preheating pipe is spirally wound around the outer wall of the smoke exhaust pipe. By arranging the air preheating pipe in contact with the smoke exhaust pipe, the heat of the smoke in the smoke exhaust pipe can be transferred to the air preheating pipe, thereby heating the air in the air preheating pipe, and the spiral winding layout can increase the contact area between the air preheating pipe and the smoke exhaust pipe, thereby improving the efficiency of heat transfer.

[0012] Preferably, an upper end of the air preheating tube is connected to an air intake pipe, and one end of the air intake pipe is connected to a blower, so that air is injected into the air preheating tube through the air intake pipe by the blower.

[0013] Preferably, an air supply pipe is connected to the lower end of the air preheating pipe, and the air supply pipe is connected to the interior of the boiler. One end of the bottom of the air supply pipe is below the recovery pipe. The new air preheated by the air preheating pipe is sent into the boiler from the air supply pipe to achieve combustion assistance while also completing heat recovery, greatly reducing heat loss. After entering the boiler, the new air carries the ash particles discharged from the recovery pipe for secondary heating, avoiding fuel waste and achieving the purpose of reciprocating heat utilization.

[0014] By means of the above technical solution, the utility model provides a reciprocating steam boiler. It has at least the following beneficial effects:

[0015] 1. When the smoke exhaust pipe of the utility model discharges smoke, the smoke is guided to the inside of the separation cylinder through the guide pipe, and an air flow vortex is formed inside the separation cylinder. Under the action of inertia, smoke dust particles with larger mass in the smoke are thrown out at the outermost side of the air flow vortex and contact with the inner wall of the separation cylinder. After the contact, the smoke dust particles lose inertia and fall into the funnel due to their own weight, and slide back into the boiler through the inclined recovery pipe for secondary combustion, so as to greatly improve the utilization rate of fuel.

[0016] 2. The utility model arranges the air preheating pipe in contact with the smoke exhaust pipe, so that the heat of the smoke in the smoke exhaust pipe can be transferred to the air preheating pipe, thereby heating the air in the air preheating pipe, and the spiral winding layout can increase the contact area between the air preheating pipe and the smoke exhaust pipe, which can improve the efficiency of heat transfer. The new air preheated by the air preheating pipe is sent into the boiler from the air supply pipe to achieve combustion assistance, and heat recovery is also completed, which greatly reduces the heat loss. After entering, the new air will carry the ash particles discharged from the recovery pipe for secondary heating, which avoids fuel waste and achieves the purpose of reciprocating heat utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a back view of the utility model;

[0020] Figure 3 It is a partial cross-sectional view of the fuel recovery mechanism in the utility model;

[0021] Figure 4 It is a partial cross-sectional view of the heat recovery mechanism in the utility model.

[0022] In the figure: 1. boiler; 2. smoke exhaust pipe; 3. fuel recovery mechanism; 31. guide pipe; 32. separation cylinder; 321. funnel; 322. exhaust port; 323. ceiling; 324. recovery pipe; 4. heat recovery mechanism; 41. insulation cylinder; 42. air preheating pipe; 43. air intake pipe; 44. blower; 45. air supply pipe. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] A reciprocating steam boiler, such as Figure 1-Figure 4 As shown, it includes a boiler 1, a smoke exhaust pipe 2 is connected to the top of the back of the boiler 1, a fuel recovery mechanism 3 is arranged on the top of the smoke exhaust pipe 2, and the fuel recovery mechanism 3 includes a guide pipe 31, the guide pipe 31 is connected to the top of the smoke exhaust pipe 2, one end of the guide pipe 31 is connected to a separation cylinder 32, the bottom of the separation cylinder 32 is connected to a funnel 321, the bottom of the funnel 321 is connected to a recovery pipe 324, the recovery pipe 324 is connected to the inside of the boiler 1, when the smoke exhaust pipe 2 discharges smoke, the smoke is guided to the inside of the separation cylinder 32 through the guide pipe 31, and an air flow vortex is formed inside the separation cylinder 32. Under the action of inertia, the smoke dust particles with larger mass in the smoke will be thrown out at the outermost side of the air flow vortex and contact with the inner wall of the separation cylinder 32. The dust particles in the flue gas will lose inertia and fall into the funnel 321 due to their own weight, and then slide back into the boiler 1 through the inclined recovery pipe 324 for secondary combustion, so as to greatly improve the utilization rate of the fuel. The top of the separation cylinder 32 is connected with an exhaust port 322, and the lighter gas after separation by the air flow vortex will be discharged from the exhaust port 322 to prevent the dust particles in the flue gas from polluting the surrounding environment. The top of the exhaust port 322 is connected with a ceiling 323 to prevent foreign matter from falling into the interior of the separation cylinder 32 from the exhaust port 322. The guide tube 31 and the inner wall of the separation cylinder 32 are arranged to be tangent to the inner circle. By making the guide tube 31 and the inner wall of the separation cylinder 32 tangent to the inner circle, the flue gas entering the separation cylinder 32 is more likely to form an air flow vortex.

[0026] In this embodiment, when the smoke exhaust pipe 2 discharges smoke, the smoke is guided to the interior of the separation cylinder 32 through the guide pipe 31. Since the guide pipe 31 and the inner wall of the separation cylinder 32 are tangent to the inner circle, the smoke entering the separation cylinder 32 forms an air flow vortex inside the separation cylinder 32. Under the action of inertia, the smoke dust particles with larger mass in the smoke will be thrown out to the outermost side of the air flow vortex and contact with the inner wall of the separation cylinder 32. After the contact, the smoke dust particles will lose inertia and fall into the funnel 321 due to their own weight, and slide back into the boiler 1 through the inclined recovery pipe 324 for secondary combustion, so as to greatly improve the utilization rate of the fuel. After separation by the air flow vortex, the lighter gas will be discharged from the exhaust port 322 to avoid the dust particles in the smoke from polluting the surrounding environment.

[0027] Example 2

[0028] like Figure 2 , Figure 4 As shown, the outer wall of the smoke exhaust pipe 2 is provided with a heat recovery mechanism 4, and the heat recovery mechanism 4 includes a heat preservation tube 41, and the heat preservation tube 41 is sleeved on the outer wall of the smoke exhaust pipe 2. By wrapping the smoke exhaust pipe 2 with the heat preservation tube 41, the heat loss during the smoke exhaust process of the smoke exhaust pipe 2 can be reduced, and a relatively constant temperature constant temperature zone has been formed. An air preheating pipe 42 is arranged inside the heat preservation tube 41, and the air preheating pipe 42 is spirally wound around the outer wall of the smoke exhaust pipe 2. By arranging the air preheating pipe 42 to contact the smoke exhaust pipe 2, the heat of the smoke in the smoke exhaust pipe 2 can be transferred to the air preheating pipe 42, thereby heating the air in the air preheating pipe 42, and the spiral winding layout can increase the contact area between the air preheating pipe 42 and the smoke exhaust pipe 2, which can improve In order to improve the efficiency of heat transfer, an upper end of the air preheating pipe 42 is connected to an air inlet pipe 43, and one end of the air inlet pipe 43 is connected to a blower 44. Air is injected into the air preheating pipe 42 through the air inlet pipe 43 by the blower 44. An lower end of the air preheating pipe 42 is connected to an air supply pipe 45. The air supply pipe 45 is connected to the interior of the boiler 1. One end of the bottom of the air supply pipe 45 is below the recovery pipe 324. The new air preheated by the air preheating pipe 42 is sent into the boiler 1 from the air supply pipe 45 to achieve combustion support while also completing heat recovery, which greatly reduces heat loss. After entering the boiler 1, the new air will carry the ash particles discharged from the recovery pipe 324 for secondary heating, thereby avoiding fuel waste and achieving the purpose of reciprocating heat utilization.

[0029] In this embodiment, wrapping the smoke exhaust pipe 2 with the insulation tube 41 can reduce the heat loss during the smoke exhaust process of the smoke exhaust pipe 2, and a relatively constant temperature zone is formed. Air is injected into the air preheating pipe 42 through the air intake pipe 43 by the blower 44. The contact between the air preheating pipe 42 and the smoke exhaust pipe 2 can transfer the heat of the smoke in the smoke exhaust pipe 2 to the air preheating pipe 42, thereby heating the air in the air preheating pipe 42, and the spiral winding layout can increase the contact area between the air preheating pipe 42 and the smoke exhaust pipe 2, which can improve the efficiency of heat transfer. The new air preheated by the air preheating pipe 42 is sent into the boiler 1 from the air supply pipe 45 to achieve combustion assistance, and heat recovery is also completed, which greatly reduces the heat loss. After entering, the ash particles discharged from the recovery pipe 324 will be carried for secondary heating, avoiding fuel waste and achieving the purpose of reciprocating heat utilization.

[0030] When a reciprocating steam boiler of the utility model is in use, when the smoke exhaust pipe 2 discharges smoke, the smoke is guided to the inside of the separation cylinder 32 through the guide pipe 31. Since the guide pipe 31 and the inner wall of the separation cylinder 32 are tangent to the inner circle, the smoke entering the separation cylinder 32 forms an air flow vortex inside the separation cylinder 32. Under the action of inertia, the smoke dust particles with larger mass in the smoke will be thrown out at the outermost side of the air flow vortex and contact with the inner wall of the separation cylinder 32. After the contact, the smoke dust particles will lose inertia and fall into the funnel 321 due to their own weight, and slide back into the boiler 1 through the inclined recovery pipe 324 for secondary combustion, so as to greatly improve the utilization rate of fuel. After separation by the air flow vortex, the lighter gas will be discharged from the exhaust port 322 to avoid the dust particles in the smoke from polluting the surrounding environment. Wrapping the smoke exhaust pipe 2 can reduce the heat loss during the smoke exhaust process of the smoke exhaust pipe 2, and a relatively constant temperature zone has been formed. Air is injected into the air preheating pipe 42 through the air intake pipe 43 by the blower 44. The contact between the air preheating pipe 42 and the smoke exhaust pipe 2 can transfer the heat of the smoke in the smoke exhaust pipe 2 to the air preheating pipe 42, thereby heating the air in the air preheating pipe 42, and the spiral winding layout can increase the contact area between the air preheating pipe 42 and the smoke exhaust pipe 2, which can improve the efficiency of heat transfer. The new air preheated by the air preheating pipe 42 is sent into the boiler 1 from the air supply pipe 45 to achieve combustion assistance, and heat recovery is also completed, which greatly reduces the heat loss. After entering, it will carry the ash particles discharged from the recovery pipe 324 for secondary heating, avoiding fuel waste and achieving the purpose of reciprocating heat utilization.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reciprocating steam boiler, comprising a boiler (1), characterized in that: The top of the back side of the boiler (1) is connected to a smoke exhaust pipe (2), and a fuel recovery mechanism (3) is arranged on the top of the smoke exhaust pipe (2). The fuel recovery mechanism (3) comprises a guide pipe (31), and the guide pipe (31) is connected to the top of the smoke exhaust pipe (2). One end of the guide pipe (31) is connected to a separation cylinder (32), and the bottom of the separation cylinder (32) is connected to a funnel (321), and the bottom of the funnel (321) is connected to a recovery pipe (324), and the recovery pipe (324) is connected to the inside of the boiler (1).

2. A reciprocating steam boiler according to claim 1, characterized in that: The top of the separation cylinder (32) is connected to an exhaust port (322), and the top of the exhaust port (322) is connected to a ceiling (323).

3. A reciprocating steam boiler according to claim 1, characterized in that: The guide tube (31) and the inner wall of the separation cylinder (32) are arranged on an inner circle tangent line.

4. A reciprocating steam boiler according to claim 1, characterized in that: The outer wall of the smoke exhaust pipe (2) is provided with a heat recovery mechanism (4), and the heat recovery mechanism (4) comprises a heat preservation tube (41), and the heat preservation tube (41) is sleeved on the outer wall of the smoke exhaust pipe (2).

5. A reciprocating steam boiler according to claim 4, characterized in that: An air preheating pipe (42) is arranged inside the heat preservation tube (41), and the air preheating pipe (42) is spirally wound around the outer wall of the smoke exhaust pipe (2).

6. A reciprocating steam boiler according to claim 5, characterized in that: An upper end of the air preheating pipe (42) is connected to an air intake pipe (43), and one end of the air intake pipe (43) is connected to a blower (44).

7. A reciprocating steam boiler according to claim 5, characterized in that: An air supply pipe (45) is connected to one lower end of the air preheating pipe (42), and the air supply pipe (45) is in communication with the interior of the boiler (1). One lower end of the air supply pipe (45) is located below the recovery pipe (324).

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