CN203549865U

CN203549865U - Load following controllable multidirectional heat convection smoke flue capable of resisting ash deposition and moisture condensation

Info

Publication number: CN203549865U
Application number: CN201320480984.9U
Authority: CN
Inventors: 马成果
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-08-02
Filing date: 2013-08-02
Publication date: 2014-04-16
Anticipated expiration: 2023-08-02

Abstract

The utility model relates to boiler heat convection smoke flues, particularly to a load following controllable multidirectional heat convection smoke flue capable of resisting ash deposition and moisture condensation. The load following controllable multidirectional heat convection smoke flue capable of resisting ash deposition and moisture condensation solves the technical problems that existing heat convection smoke flue structures can lead to ash deposition due to position invariance of ash adhering dead angles of negative-pressure vortex regions, can result in moisture condensation due to over-low smoke temperature of tail heating surfaces under rated smoke velocities, and when boilers start or work under low load, can reach the minimum point of the smoke temperature on the tail heating surfaces to cause moisture condensation on the tail heating surfaces and further bring damage to the boilers and be harmful to starting and low-load operation of the boilers. According to the technical scheme, the load following controllable multidirectional heat convection smoke flue capable of resisting ash deposition and moisture condensation is composed of a smoke wall and convection heating surface groups inside the smoke wall, and 90-degree adjustable shutters or slide gate plates are arranged between neighboring convection heating surface groups as well as the smoke inlet and the smoke outlet of the heat convection smoke flue.

Description

The controlled multidirectional stream heat convection flue of a kind of anti-dust stratification dewfall and follow load

Technical field

The utility model relates to boiler heat convection flue, particularly relates to the controlled multidirectional stream heat convection flue of a kind of anti-dust stratification, dewfall and follow load.

Background technology

The existing boiler heat convection flue just convection heating surface group in Yan Qiang and cigarette wall forms, flue gas in burner hearth enters in heat convection flue from the import of heat convection flue gas, march to the outlet of heat convection flue gas, flue gas the path of process be constant cross-section straight tube path, flue gas direct of travel, cigarette speed, sweep of gases is non-adjustable to every group of heating surface of convection heating surface group, because flue gas direct of travel in heat convection flue is non-adjustable, its deficiency is, during air water heat exchanger tube in flue gas transversal flow convection heating surface group, air water heat exchanger tube at sweep of gases remains constant in face generation position, dust dead angle, eddy current (negative pressure) district dorsad, form dust stratification, due to flue gas, to enter in heat convection flue cigarette speed non-adjustable, and its deficiency is, when specified cigarette speed, flue gas with cigarette wall in the effect of front end convection heating surface group after, the flue-gas temperature range of decrease is large, when flue gas arrives the back-end surfaces in cigarette wall, flue-gas temperature is too low, easily forms dewfall, because sweep of gases is non-adjustable to every group of heating surface of convection heating surface group, its deficiency is, at boiler, open stove or when boiler at low load moves, because of flue-gas temperature lower, the flue gas of lower temperature is washed into again whole convection heating surface groups, causes cigarette temperature to continue to decline to a great extent, when flue gas arrives the back-end surfaces in cigarette wall, flue-gas temperature reaches minimum point, forms back-end surfaces dewfall.

Utility model content

The technical problems to be solved in the utility model is, existing boiler heat convection flue structure, flue gas is constant cross-section straight tube path by time institute through path, make flue gas direct of travel in heat convection flue non-adjustable, during air water heat exchanger tube in flue gas transversal flow convection heating surface group, produce position, dust dead angle, eddy current (negative pressure) district and remain constant, form dust stratification; Make flue gas enter in heat convection flue cigarette speed non-adjustable, when specified cigarette speed, the flue-gas temperature range of decrease is large, and when flue gas arrives the back-end surfaces in cigarette wall, flue-gas temperature is too low, easily forms dewfall; Make flue gas in heat convection flue, be washed into every group of convection heating surface group non-adjustable, when boiler opens stove or underrun, when flue gas arrives the back-end surfaces in cigarette wall, flue-gas temperature reaches the deficiency that minimum point forms back-end surfaces dewfall.

For solving the problems of the technologies described above, technical solution adopted in the utility model is:

Scheme one, the controlled multidirectional stream heat convection flue of a kind of anti-dust stratification, dewfall and follow load is provided, it is the heat convection flue that the convection heating surface group in Yan Qiang and cigarette wall forms, between adjacent described convection heating surface group and described heat convection flue gas import and export place have the adjustable shutter of 90 degree, every layer of described shutter is that vane group forms, the blade fixed frame of described shutter and described cigarette within the walls or outer wall be fixed, every group of blade place axle connects with making its transmission devices that rotate 90 degree respectively.

Scheme two, the controlled multidirectional stream heat convection flue of a kind of anti-dust stratification, dewfall and follow load is provided, it is the heat convection flue that the convection heating surface group in Yan Qiang and cigarette wall forms, between adjacent described convection heating surface group and described heat convection flue gas import and export place have a shuttle plate, described shuttle plate be fixed on the slideway of described cigarette inner wall and described cigarette wall on the Packed shuttle plate of corresponding tool push-and-pull mouth coordinate, described shuttle plate connects with making its reciprocating transmission device.

The utility model compared with the prior art, owing to being designed with described shutter or described shuttle plate structure, the one, described shutter wherein described in two groups blade or described shuttle plate in left and right, when interlayer and mutual staggered floor are rotated at regular intervals switch, flue gas in described controlled multidirectional stream heat convection flue the path of process be, direct of travel starts and starts the serpentine path of rotating at regular intervals and occurring left to the right, its beneficial effect is, during air water heat exchanger tube in flue gas transversal flow convection heating surface group, producing position, dust dead angle, described eddy current (negative pressure) district can rotate at regular intervals as the part as sweep of gases face, wash away former dust stratification, i.e. anti-dust stratification, the 2nd, when the blade of described shutter or described shuttle plate are all opened, flue gas in described controlled multidirectional stream heat convection flue the path of process be, become straight tube path, heavy in section, its beneficial effect is, when specified cigarette speed, after entering in the described controlled multidirectional stream heat convection flue while becoming straight tube path, heavy in section, cigarette speed declines, and the flue-gas temperature range of decrease is little, while being unlikely to make flue gas to arrive the back-end surfaces in cigarette wall, the too low formation dewfall of temperature, i.e. Anti-dew, the 3rd, when the described vane group of described shutter or described shuttle plate sync section are closed, flue gas is only washed into the part of every group of convection heating surface group in described controlled multidirectional stream heat convection flue, reduced heating surface, its beneficial effect is, at boiler, open stove or when boiler at low load moves, the flue gas that produces lower temperature no longer includes the larger temperature range of decrease, while avoiding flue gas to arrive the back-end surfaces in cigarette wall, flue-gas temperature reaches minimum point, form back-end surfaces dewfall, it is Anti-dew, be conducive to that boiler opens stove and can significantly to adjust boiler load be follow load simultaneously, the infringement of avoiding boiler low load with strong power to bring.

Accompanying drawing explanation

Fig. 1 is the controlled multidirectional stream heat convection flue of a kind of anti-dust stratification, dewfall and follow load, between adjacent described convection heating surface group and when described heat convection flue gas import and export place has 90 to spend adjustable shutter situation, the main TV structure schematic diagram of broken section;

Fig. 2 is the controlled multidirectional stream heat convection flue of a kind of anti-dust stratification, dewfall and follow load, between adjacent described convection heating surface group and when described heat convection flue gas import and export place has 90 to spend adjustable shutter situation, in Fig. 1, A-A is to sectional structure schematic diagram;

Fig. 3 is the controlled multidirectional stream heat convection flue of a kind of anti-dust stratification, dewfall and follow load, between adjacent described convection heating surface group and when described heat convection flue gas import and export place has shuttle plate situation, analyses and observe main TV structure schematic diagram;

Fig. 4 is the controlled multidirectional stream heat convection flue of a kind of anti-dust stratification, dewfall and follow load, and between adjacent described convection heating surface group and when described heat convection flue gas import and export place has shuttle plate situation, in Fig. 3, B-B is to sectional structure schematic diagram.

The specific embodiment

Below in conjunction with accompanying drawing, provide the utility model preferred embodiment: by Fig. 1, a kind of anti-dust stratification that Fig. 2 provides, the controlled multidirectional stream heat convection flue of dewfall and follow load, it is the heat convection flue that the convection heating surface group 2 in cigarette wall 1 and cigarette wall 1 forms, between adjacent described convection heating surface group 2 and described heat convection flue gas enter, there is the adjustable shutter of 90 degree in exit, the blade of every layer of described shutter is left, right two group 4, 5, blade fixed frame 7 and cigarette wall 1 inwall of described shutter are fixed, described its transmission device that rotates 90 degree that can make is the connecting rod swing-bar mechanism that fork 3 and control link 6 form, fork 3 is fixed with one end of each blade place axle of described shutter, one end fork 3 of every group of blade place axle is control link 6 hinge-coupled corresponding with respectively.For ease of installing, safeguarding and be beneficial to heat exchange, between adjacent described convection heating surface group 2, can establish the described shutter of bilayer that is considered as one deck synchronization action; When boiler tonnage is larger, described shutter is aided with support by adding crossbeam in cigarette wall 1.By Fig. 3, a kind of anti-dust stratification that Fig. 4 provides, the controlled multidirectional stream heat convection flue of dewfall and follow load, it is the heat convection flue that the convection heating surface group 2 in cigarette wall 1 and cigarette wall 1 forms, between adjacent described convection heating surface group 2 and described heat convection flue gas enter, there is a shuttle plate 9 in exit, shuttle plate 9 be fixed on the slideway of cigarette wall 1 inwall and cigarette wall 1 on the Packed shuttle plate of corresponding tool push-and-pull mouth coordinate, described its reciprocating transmission device that can make is a screw mandrel 8, screw on screw mandrel 8 and shuttle plate 9, on cigarette wall 1, the Packed screw mandrel fairlead of tool coordinates.Described shutter and shuttle plate 9 materials are ordinary carbon steel or heat-and corrosion-resistant steel alloy.During use, manipulation connecting rod 6, screw mandrel 8 manually or automatically, make described in two group 4,5 of described shutter blade or shuttle plate 9 left and right, and interlayer and the mutually staggered floor switch of rotating at regular intervals, realizes the anti-dust stratification of convection heating surface group; Make described in two group 4,5 of described shutter blade or shuttle plate 9 all open, while realizing specified cigarette speed, the back-end surfaces dewfall in anti-cigarette wall 1; Make described in a group 4 or 5 of described shutter blade or shuttle plate 9 at left or right side close synchronously, realizing and being beneficial to that boiler opens stove and adjust boiler load is follow load, during blowing out, is also beneficial to high speed winds to dust stratification cleaning in described convection heating surface group 2.

Claims

1. the controlled multidirectional stream heat convection flue of an anti-dust stratification, dewfall and follow load, it is the heat convection flue that the convection heating surface group in Yan Qiang and cigarette wall forms, it is characterized in that: between adjacent described convection heating surface group and described heat convection flue gas import and export place have the adjustable shutter of 90 degree, every layer of described shutter is that vane group forms, the blade fixed frame of described shutter and described cigarette within the walls or outer wall be fixed, every group of blade place axle connects with making its transmission devices that rotate 90 degree respectively.

2. the controlled multidirectional stream heat convection flue of anti-dust stratification according to claim 1, dewfall and follow load, it is characterized in that: described its transmission device that rotates 90 degree that can make is the connecting rod swing-bar mechanism that fork and control link form, one end of each blade place axle of described fork and described shutter is fixed, the fork control link hinge-coupled corresponding with respectively described in one end of every group of blade place axle.

3. the controlled multidirectional stream heat convection flue of an anti-dust stratification, dewfall and follow load, it is the heat convection flue that the convection heating surface group in Yan Qiang and cigarette wall forms, it is characterized in that: between adjacent described convection heating surface group and described heat convection flue gas import and export place have a shuttle plate, described shuttle plate be fixed on the slideway of described cigarette inner wall and described cigarette wall on the Packed shuttle plate of corresponding tool push-and-pull mouth coordinate, described shuttle plate connects with making its reciprocating transmission device.

4. the controlled multidirectional stream heat convection flue of anti-dust stratification according to claim 3, dewfall and follow load, it is characterized in that: described its reciprocating transmission device that can make is a screw mandrel, screw on described screw mandrel and described shuttle plate, on described cigarette wall, the Packed screw mandrel fairlead of tool coordinates.