CN212644650U

CN212644650U - Ash removing mechanism for prolonging boiler operation period without stopping boiler

Info

Publication number: CN212644650U
Application number: CN202021048484.4U
Authority: CN
Inventors: 陈国强; 陈国忠; 朱昌建; 薛军
Original assignee: Jingzhou Wangneng Environmental Protection Energy Co ltd
Current assignee: Jingzhou Wangneng Environmental Protection Energy Co ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-03-02
Anticipated expiration: 2030-06-09

Abstract

The utility model discloses a non-stop ash cleaning mechanism for prolonging the operation period of a boiler, which comprises a front economizer, a rear economizer, an air preheater and an ash cleaning gun which are sequentially arranged in a flue, and is characterized in that ash cleaning holes matched with the ash cleaning gun are respectively arranged on the wall of the flue above the front economizer, between the front economizer and the rear economizer, between the rear economizer and a secondary air preheater and above a primary air preheater; the outer side of the ash cleaning hole is provided with an openable sealing cover, the cleaning operation section of the ash cleaning gun is a wind pressure pipe, and the length of the wind pressure pipe is matched with the inner diameter of the flue. Can be under the state that the boiler does not shut down, all-round multi-angle effectively clears away the binder such as economizer, air heater surface ashes in the flue, has avoided the damage that traditional clearance mode caused flue internal plant, operation process safe and reliable, equips the configuration simple easily, has improved boiler operation cycle greatly, drops into few practicality strong.

Description

Ash removing mechanism for prolonging boiler operation period without stopping boiler

Technical Field

The utility model relates to a boiler power generation technique, especially a deashing mechanism does not shut down the stove of extension boiler operation cycle.

Background

In a boiler thermal power plant system, in order to fully utilize heat, a high-temperature superheater, a low-temperature superheater, an economizer, an air preheater and the like are sequentially arranged on a flue at the tail part of a boiler from top to bottom, and in the operation process, ash and other substances discharged along with flue gas are often deposited on the surfaces of the economizer and the air preheater for a long time to cause blockage, so that the working efficiency of the economizer, the air preheater and the like is low and the flue flow is not smooth if the cleaning is not carried out in time. At present the on-site processing mode mainly stretches into the flue with manual drill rod from the observation hole and constantly disclose stirring, because visibility is poor in the flue, so the observation hole drill way must be enough big, with the stirring angle and the scope that satisfy the drill rod, this kind of operating means must be shut down and go on, otherwise the flue internal thermal force dashes outward and can cause the safety injury to operating personnel, and, this kind of manual operating means of drill rod can't be to the economizer, each position of air heater clears up, it is still right, the place that can not clear up for a long time can gather the disease more, thereby cause equipment function to become invalid.

Disclosure of Invention

The utility model aims at solving the problem and providing a non-stop deashing mechanism for prolonging the operation period of the boiler, the cleaning angle is comprehensive, the shutdown is not needed, and the operation is safe.

The above technical problem of the present invention can be solved by the following technical solutions: a soot cleaning mechanism for prolonging the operation period of a boiler without stopping the boiler comprises a front economizer, a rear economizer, a secondary air preheater, a primary air preheater and a soot cleaning gun which are sequentially arranged in a flue, and is characterized in that soot cleaning holes matched with the soot cleaning gun are respectively arranged on the wall of the flue above the front economizer, between the front economizer and the rear economizer, between the rear economizer and the secondary air preheater and above the primary air preheater; the outer side of the ash cleaning hole is provided with an openable sealing cover, the cleaning operation section of the ash cleaning gun is a wind pressure pipe, and the length of the wind pressure pipe is matched with the inner diameter of the flue.

The foregoing extensionIn the ash removal mechanism without stopping the boiler in the operation period of the boiler, preferably, the ash removal gun is provided with air pressure by an air compressor, and the air pressure is more than or equal to 8 (kgf/cm)²)。

In the ash removal mechanism for prolonging the operation period of the boiler without stopping the boiler, preferably, the openable sealing cover is provided with a plug matched with the ash removal hole, and an anti-impact sealing seat matched with the plug is arranged in the wall of the flue pipe outside the ash removal hole.

In the ash removal mechanism for prolonging the operation period of the boiler without stopping the boiler, preferably, an anti-impact sealing seat is arranged in the wall of the flue tube outside the ash removal hole, and a hand guard matched with the anti-impact sealing seat is arranged between the wind pressure tube of the ash removal gun and the handle.

In the ash removal mechanism for prolonging the operation period of the boiler without stopping the boiler, preferably, the ash removal gun is further provided with an inflation switch.

In the ash removal mechanism for prolonging the operation period of the boiler without stopping the boiler, preferably, the top of the air pressure pipe of the ash removal gun is a spherical surface, and the spherical surface is provided with the air injection port.

In the ash removal mechanism for prolonging the operation period of the boiler without stopping the boiler, preferably, a group of downward air injection openings are arranged on the air pressure pipe of the ash removal gun.

In the ash removal mechanism for prolonging the operation period of the boiler without stopping the boiler, preferably, one end of the openable sealing cover is hinged to the wall of the flue tube, and the other end of the openable sealing cover is provided with a fixing hook which is matched with a tightening buckle fixed on the wall of the flue tube.

In the ash removal mechanism for prolonging the operation period of the boiler without stopping the boiler, preferably, the ash removal holes are uniformly distributed along the circumference of the wall of the flue tube, and the upper row and the lower row of the ash removal holes are arranged in a staggered manner.

The technical scheme mainly takes the problems of the economizer and the air preheater which are positioned in the flue as research objects, and ensures that the cleaning treatment is carried out on the surfaces of the economizer and the air preheater without stopping the boiler while the surface of the economizer and the air preheater are subjected to disease (bonding materials). The specific means is to design a heat-resistant (temperature is more than 400 ℃) inflatable deashing gun, and ash cleaning holes matched with the deashing gun are formed in the wall of the flue cylinder above each coal economizer and the air preheater, so that the deashing gun is ensured to have certain movement allowance along the horizontal direction, and ash and the like in the flue can not be flushed out from the ash cleaning holes to cause potential safety hazards to operators. The deashing hole of this scheme evenly arranges along flue section of thick bamboo wall a week, and the aperture is also than the observation window among the prior art little much, can blow in to the flue from each position.

Further, in order to accomplish the deashing work under the non-stop state, the closing cap in deashing hole is different completely with traditional whole apron dismantlement type, be equipped with in the deashing hole outside and open the closing cap, can open the closing cap have with deashing hole complex end cap, and be equipped with in the flue section of thick bamboo wall in the deashing hole outside with the scour protection seal receptacle, end cap and scour protection seal receptacle all adopt soft fire-proof material preparation, not only can play sealed effect after mutually supporting, have thermal-insulated effect moreover.

Furthermore, the openable sealing cover is hinged to the wall of the flue duct cylinder, the whole disassembly of the openable sealing cover is not needed like the traditional observation window, the fixing hook on the sealing cover can be separated from the openable sealing cover only by pulling the tightening buckle, the operation is simple, and the openable sealing cover has certain inward elasticity when being fastened, so that the sealing performance is better.

The deashing rifle in this device has handle, hand protector, and wherein the hand protector can protect the safety of operating personnel hand when the operation, has the effect the same with end cap on the closing cap again simultaneously, when clearing up the flue gas channel deposit thing promptly, can block up the deashing hole with the cooperation of scour protection seal receptacle completely, avoids high temperature ashes excessive. The cleaning operation section of the ash cleaning gun is a metal wind pressure pipe, and 8 (kgf/cm) of the dust cleaning gun is sprayed into the flue during operation²) And the air completely meets the requirement of removing the adhesive on the surfaces of the coal economizer and the air preheater. Still be equipped with on the deashing rifle handle and aerify the switch, open compressed air again after the wind-pressure pipe stretches into the flue completely, guarantee operation safety, simultaneously, can also carry out the operation of blowing discontinuously at any time, improve the clearance effect.

In addition, the top of the air pressure pipe of the ash removal gun in the device is spherical, the cleaned device cannot be damaged, the spherical surface is removed and provided with the air injection ports in the forward direction, and the group of downward air injection ports can concentrate wind power to sweep the cleaned object.

Compared with the prior art, the beneficial effects of the utility model are that: can be under the state that the boiler does not shut down, all-round multi-angle effectively clears away the binder such as economizer, air heater surface ashes in the flue, has avoided the damage that traditional clearance mode caused flue internal plant, operation process safe and reliable, equips the configuration simple easily, has improved boiler operation cycle greatly, drops into few practicality strong.

Drawings

Fig. 1 is a schematic diagram of the system position in use of the present invention.

Fig. 2 is a schematic diagram of a structure of a flue application point of the present invention.

Fig. 3 is a partial enlarged structural view at M of fig. 2.

Fig. 4 is a schematic structural diagram of a state of using the ash removal gun according to the present invention.

Fig. 5 is a schematic structural view of the ash removal gun of the present invention.

Fig. 6 is a schematic view of the arrangement structure of the dust removing holes on the same layer of the flue of the present invention.

FIG. 7 is a schematic view of the arrangement of the dust removing holes at different layer parts of the flue of the present invention.

In the figure: 1. the boiler comprises a boiler, 2, a steam drum, 3, a flue, 4, a dust remover, 5, a primary air preheater, 6, a secondary air preheater, 7, a rear economizer, 8, a front economizer, 9, a dust cleaning hole, 10, an openable sealing cover, 11, a tensioning buckle, 12, an ash cleaning gun, 1201, a handle, 1202, an inflation switch, 1203, a hand guard, 1204, a wind pressure pipe and 13, an anti-impact sealing seat.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

The ash removal mechanism for prolonging the operation period of the boiler without stopping the boiler is arranged on a flue 3 of the boiler 1, as shown in figures 1 and 2, a steam drum 2 is arranged above the boiler 1, the flue 3 is arranged perpendicular to the ground, and the flue 3 is communicated with a chimney through a dust remover 4 and an induced draft fan.

A high-temperature superheater and a low-temperature superheater, a front economizer 8 and a rear economizer 7, and a secondary air preheater 6 and a primary air preheater 5 are sequentially arranged in the flue 3 from top to bottom.

Firstly, ash cleaning holes 9 are arranged on the wall of the flue 3, the ash cleaning holes 9 are arranged above the front economizer, between the front economizer and the rear economizer, between the rear economizer and the secondary air preheater and above the primary air preheater, 8 ash cleaning holes 9 are uniformly arranged along the periphery of the wall of the flue 3, and the positions of the upper row of ash cleaning holes 9 and the lower row of ash cleaning holes 9 are arranged in a staggered manner, as shown in fig. 6 and 7. An openable sealing cover 10 is arranged on the outer side of the ash cleaning hole 9, the openable sealing cover 10 is provided with a plug made of high-temperature-resistant asbestos materials matched with the ash cleaning hole 9, and an anti-impact sealing seat 13 made of heat-resistant materials such as asbestos and the like matched with the plug is arranged in the wall of the flue barrel on the outer side of the ash cleaning hole 9. The openable sealing cover 10 is located outside the wall of the flue 3, one end of the openable sealing cover is hinged to the wall of the flue 3, the other end of the openable sealing cover is provided with a fixed hook, and as shown in fig. 3, a tensioning buckle 11 for pulling and locking the fixed hook is arranged on the wall of the flue.

The ash cleaning gun 12 extends into the flue for operation through the ash cleaning hole 9 on the wall of the flue 3, referring to fig. 4, the structure of the ash cleaning gun is shown in fig. 5, the cleaning operation section of the ash cleaning gun 12 is a throttle pressure pipe 1204, and the length of the throttle pressure pipe 1204 is matched with the inner diameter of the flue 3, and is generally less than 10cm of the inner hole of the flue. A hand guard 1203 is arranged between the tail end of an air pressure pipe 1204 of the ash removal gun 12 and the handle 1201, an asbestos plugging head which is the same as a plug in the openable sealing cover 10 is arranged in the structure of the hand guard 1203, and the asbestos plugging head is matched with an anti-impact sealing seat 13 in the wall of the flue 3 outside the ash removal hole 9. An air charging switch 1202 is arranged beside a handle 1201 of the ash cleaning gun 12 and can spray air intermittently, the air pressure of the ash cleaning gun 12 is provided by an air compressor, and the air pressure is more than or equal to 8 (kgf/cm)²). The top end of the air pressure pipe 1204 of the ash removal gun 12 is of a spherical structure, an air injection port is arranged on the spherical surface, and a group of air injection ports facing downwards is arranged on the air pressure pipe 1204.

Cleaning operation is carried out on the front economizer 8, the rear economizer 7 or equipment in other flues under the condition that the boiler 1 does not stop production, an air compressor is started, an ash cleaning gun 12 is prepared, 1 corresponding ash cleaning hole 9 above the part of the equipment to be cleaned is opened, the ash cleaning gun is stretched into the flue 3, an inflating switch 1202 is opened for operation, after the operation is finished, the ash cleaning gun 12 is taken out, a sealing cover 10 can be opened by buckling, another ash cleaning hole 9 is changed for next cleaning, and the cleaning operation is carried out in sequence until the equipment cleaning in the whole flue 3 is completed.

The above embodiments are descriptions of the present invention, not limitations of the present invention, and any structure after simple transformation is all included in the protection scope of the present invention.

Claims

1. A soot cleaning mechanism for prolonging the operation period of a boiler without stopping the boiler comprises a front economizer (8), a rear economizer (7), a secondary air preheater (6), a primary air preheater (5) and a soot cleaning gun (12) which are sequentially arranged in a flue (3), and is characterized in that soot cleaning holes (9) matched with the soot cleaning gun are respectively arranged on the walls of the flue above the front economizer, the front economizer and the rear economizer, the rear economizer and the secondary air preheater and the primary air preheater; the outer side of the ash cleaning hole is provided with an openable sealing cover (10), the cleaning operation section of the ash cleaning gun is a wind pressure pipe (1204), and the length of the wind pressure pipe is matched with the inner diameter of the flue.

2. The ash removal mechanism for prolonging the operating period of a boiler without stopping the boiler as claimed in claim 1, wherein the ash removal gun (12) is supplied with air pressure by an air compressor, and the air pressure is not less than 8 (kgf/cm)²)。

3. The mechanism for removing ash without stopping boiler in order to prolong the operation period of the boiler as claimed in claim 1, wherein the openable sealing cover (10) is provided with a plug matched with the ash removing hole (9), and an anti-impact sealing seat (13) matched with the plug is arranged in the wall of the flue pipe outside the ash removing hole.

4. The soot cleaning mechanism for prolonging the operation period of the boiler without stopping the furnace according to claim 1, wherein a scour prevention sealing seat (13) is arranged in the wall of the flue duct at the outer side of the soot cleaning hole (9), and a hand guard (1203) matched with the scour prevention sealing seat is arranged between the wind pressure pipe (1204) of the soot cleaning gun (12) and the handle (1201).

5. The soot cleaning mechanism for prolonging the operation period of the boiler without stopping the boiler according to the claim 1 or 4, characterized in that the soot cleaning gun (12) is further provided with an aeration switch (1202).

6. The soot cleaning mechanism for prolonging the operation period of the boiler without stopping the boiler according to claim 1 or 4, wherein the top of the air pressure pipe (1204) of the soot cleaning gun (12) is a spherical surface, and the spherical surface is provided with an air injection port.

7. The soot cleaning mechanism for prolonging the operation period of the boiler without stopping the boiler according to claim 1 or 4, wherein a group of downward air injection ports are arranged on the air pressure pipe (1204) of the soot cleaning gun (12).

8. The soot cleaning mechanism for prolonging the operation period of the boiler without stopping the boiler as claimed in claim 1, 2, 3 or 4, wherein one end of the openable sealing cover (10) is hinged on the wall of the flue (3), and the other end of the openable sealing cover is provided with a fixed hook which is matched with a tension buckle (11) fixed on the wall of the flue.

9. The soot cleaning mechanism for prolonging the operation period of the boiler without stopping the boiler according to the claim 1, 2, 3 or 4, characterized in that a plurality of soot cleaning holes (9) are uniformly arranged along the circumference of the cylinder wall of the flue (3), and the upper row and the lower row of soot cleaning holes are arranged in a staggered way.