CN113587076B

CN113587076B - Boiler steam-water system waste heat utilization device

Info

Publication number: CN113587076B
Application number: CN202110800664.6A
Authority: CN
Inventors: 周毅挺; 徐剑; 蒋伟杰; 孙乐天
Original assignee: Ningbo Jiufeng Thermal Power Co ltd
Current assignee: Ningbo Jiufeng Thermal Power Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2023-04-07
Anticipated expiration: 2041-07-15
Also published as: CN113587076A

Abstract

The application discloses boiler soda system waste heat utilization equipment, it includes: the steam drum is communicated with the economizer; a plurality of downcomers vertically arranged at the bottom of the steam drum; the preheating box is arranged at the bottom of the steam drum and is used for a down pipe to vertically penetrate through; the air inlet and the air outlet are arranged on two opposite sides of the preheating box; one end of the heat conduction pipe is connected with a smoke outlet of the boiler, and the other end of the heat conduction pipe is connected with an air inlet; a smoke exhaust pipe with one end connected to the air outlet and the other end extending to an external preset position; and the guide assemblies are arranged on the two inner sides of the preheating box and are used for guiding hot smoke entering the preheating box. This application can effectively utilize boiler exhaust waste heat when using, and the energy saving consumes, improves the formation efficiency of steam.

Description

Boiler steam-water system waste heat utilization device

Technical Field

The invention relates to the field of boiler steam-water systems, in particular to a waste heat utilization device of a boiler steam-water system.

Background

In the thermoelectric industry, a boiler steam-water system is generally used for generating electricity, and the boiler steam-water system mainly comprises a water inlet pipe, an economizer, a steam pocket, a downcomer, an ascending pipe, a superheater and the like, and is mainly used for heating water to finally form superheated steam.

At present, traditional soda system is at the during operation, the inlet tube is carried water to the economizer in and is heated, send into in the steam pocket again after the heating and mix with the water in the steam pocket, flow to the water wall pipe along the downcomer again, then heat furnace through fuel, make water form steam-water mixture after the water wall pipe absorbs furnace's heat, steam-water mixture can reach the steam pocket along the tedge, water, steam separation device with water, steam separation, the saturated steam that separates flows to the over heater from the steam pocket top, continue to absorb heat and become the superheated steam of uniform temperature, then send to predetermined place.

Aiming at the prior art, the inventor thinks that a large amount of hot smoke and hot gas are discharged from a smoke outlet of a boiler in the heating process of a hearth, the hot smoke is generally high in temperature, and is directly discharged and wasted, so that the hot smoke is urgently needed to be effectively utilized.

Disclosure of Invention

An object of this application is to provide a boiler steam-water system waste heat utilization equipment, can carry out effective utilization to boiler exhaust waste heat, the energy saving consumes, improves the formation efficiency of steam.

The application provides a boiler steam-water system waste heat utilization equipment adopts following technical scheme:

a waste heat utilization device of a boiler steam-water system comprises: the steam drum is communicated with the economizer; a plurality of down pipes vertically arranged at the bottom of the steam drum; the preheating box is arranged at the bottom of the steam drum and is used for a downcomer to vertically penetrate through; the air inlet and the air outlet are arranged on two opposite sides of the preheating box; one end of the heat conduction pipe is connected with the smoke outlet of the boiler, and the other end of the heat conduction pipe is connected with the air inlet; a smoke exhaust pipe with one end connected to the air outlet and the other end extending to an external preset position; and the guide assemblies are arranged on the two inner sides of the preheating box and are used for guiding the hot smoke entering the preheating box.

Through adopting above-mentioned technical scheme, the heat pipe of setting, can be with in the leading-in preheating cabinet of hot cigarette, hot cigarette or steam that get into in the preheating cabinet can preheat the downtake, make cold water in the downtake can preheat earlier before reaching the water wall pipe, both can effectively utilize boiler exhaust heat, can also reduce the use of fuel, and the direction subassembly that sets up, can lead to thermal flow direction in the preheating cabinet, make the heat flow as much as possible towards the downtake direction, further improve the utilization ratio of hot cigarette.

The present application further provides that the guide assembly comprises: the mounting cylinders are vertically mounted on the inner side of the preheating box and are positioned on two sides of the air inlet and the air outlet; and the sliding strips are connected to the inner walls of two sides of the preheating box in a sliding manner along the extending direction of the down pipe, the sliding strips are parallel to the mounting cylinder, the outer wall of the mounting cylinder is provided with strip-shaped holes along the extending direction, a winding part is mounted in the mounting cylinder, two sides of each sliding strip are connected with guide cloth, one side of each guide cloth, far away from the sliding strips, penetrates through the strip-shaped holes to be connected with the winding end of the winding part, and a driving part for driving the sliding strips to horizontally slide is further arranged on the preheating box.

By adopting the technical scheme, the driving piece can drive the sliding strip to move along the preset direction, the guide cloth on two sides can be pulled in the moving process of the sliding strip, and the guide cloth can be freely wound or released along with the change of the position of the sliding strip under the use of the winding piece in the installation cylinder, so that the guide cloth can guide the flow direction of heat in the preheating box, and the heating capacity of the downcomer is effectively improved.

The present application further provides that the drive member comprises: the horizontal thread passes through the screw rod of the slide bar; and a servo motor arranged on the preheating box and used for driving the screw rod to rotate.

Through adopting above-mentioned technical scheme, open servo motor, can drive the lead screw and rotate, the lead screw can drive the draw runner and remove along predetermined direction at rotatory in-process, and this structure easy operation easily realizes.

The device is further provided with mounting blocks arranged at four corners of the preheating box, a supporting cylinder is obliquely arranged on the mounting blocks, a sliding rod is inserted in the supporting cylinder in a sliding mode, and a compression spring used for driving the sliding rod to slide along the inner wall of the supporting cylinder to support the guide cloth is arranged in the supporting cylinder.

Through adopting above-mentioned technical scheme, the compression spring who sets up, can utilize the elastic force drive slide bar of self to slide along the inner wall of a support section of thick bamboo that stretches out and draws back, at the in-process that the direction cloth carries out rolling or release, the top of slide bar can push up the outside at the direction cloth all the time for one side that the preheating cabinet was kept away from to the direction cloth is outside protrusion in order to form the arcwall face, is favorable to the direction cloth to leading, makes the direction of downtake that can be better flow towards hot-blast.

The application further provides that a press roller is installed at one end, away from the supporting cylinder, of the slide rod, and the extending direction of the press roller is perpendicular to the extending direction of the supporting cylinder.

Through adopting above-mentioned technical scheme, the compression roller that sets up can increase on the basis of slide bar and the area of contact between the direction cloth for the area of regulation increase of direction cloth further improves the application scope of this application.

The support cylinder is hinged to the mounting block, an elastic piece used for connecting the support cylinder and the preheating box is arranged between the outer side of the support cylinder and the inner side of the preheating box, one side, far away from the elastic piece, of the support cylinder is connected with a pull wire, a winding motor is installed on the outer side of the preheating box, and a winding wheel for winding the pull wire is installed on an output shaft of the winding motor.

By adopting the technical scheme, when the included angle between the slide bar and the inner wall of the preheating box needs to be adjusted, the winding motor can be started to drive the winding wheel to rotate, the winding wheel can be matched with the elastic piece in the rotating process, and the support cylinder is driven to rotate around the mounting block, so that the inclination angle of the slide bar can be conveniently adjusted, and the application range of the support cylinder is further enlarged.

The preheating box is further provided with guide pieces hinged to the top and the bottom edges of the preheating box, wherein the top and the bottom edges of the preheating box are located at the air inlet, and buffer springs are connected between the guide pieces and the inner wall of the preheating box.

Through adopting above-mentioned technical scheme, at the in-process that hot cigarette got into the preheating cabinet, hot cigarette can form certain impact force to the guide vane, and the buffer spring who sets up can utilize the elastic force of self, cushions the guide vane for steam can be more even blow down the pipe.

The application further provides that a heat insulation layer is attached to one side, away from the preheating box, of the guide cloth.

Through adopting above-mentioned technical scheme, the insulating layer of setting can reduce the direction cloth and to thermal absorption and lead to thermal loss to can further improve thermal utilization efficiency.

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

hot smoke of the boiler is guided into the preheating box through the heat conduction pipe, so that the hot smoke in the preheating box can heat the descending pipe in advance, subsequent heating fuel can be omitted, the cyclic utilization of resources can be promoted, and meanwhile, the cost can be saved;

the direction subassembly that sets up and the mutually supporting of slide bar, the direction subassembly can lead to the steam in the preheating cabinet for steam is more flows towards the downtake, and the slide bar can adjust the protruding face position of direction cloth according to the removal of draw runner under compression spring's drive, makes the better downtake of heat flow downwards, further utilizes steam, improves the waste heat effect of downtake.

Drawings

FIG. 1 is a schematic vertical section of a preheating chamber in an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a preheating chamber in an embodiment of the present application;

fig. 3 is an enlarged view at a in fig. 2.

Description of reference numerals: 1. a steam drum; 10. a down pipe; 2. a preheating box; 21. an air inlet; 22. an air outlet; 23. a guide piece; 24. a buffer spring; 31. a heat conduction pipe; 32. a smoke exhaust pipe; 4. mounting the cylinder; 41. a slide bar; 42. a guide cloth; 43. a screw rod; 44. a servo motor; 5. mounting blocks; 51. a support cylinder; 52. a slide bar; 53. a compression spring; 54. pressing rollers; 55. a pull wire; 56. a winding motor; 57. and (7) winding the wheel.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses boiler soda system waste heat utilization equipment, as shown in fig. 1 and fig. 2, include: the steam drum 1 is communicated with the economizer, a plurality of descending pipes 10 are vertically arranged at the bottom of the steam drum 1, water in the steam drum 1 is conveyed to the water wall tubes through the descending pipes 10, then the water wall tubes are heated through fuel in a boiler, a heated steam-water mixture can enter the steam drum 1 along the ascending pipes, and then water and steam are separated through the steam-water separation device.

In practice, the hot cigarette that the boiler combustion produced can directly discharge, in order to carry out effective utilization to the waste heat of hot cigarette in this embodiment for hot cigarette can preheat downcomer 10, saves the fuel of follow-up heating water wall pipe, consequently is provided with the waste heat utilization equipment.

In this embodiment, install preheating cabinet 2 through the mounting bracket in the bottom of steam pocket 1, downcomer 10 of steam pocket 1 bottom is vertical to be passed from preheating cabinet 2, and air inlet 21 has been seted up in one side of preheating cabinet 2, gas outlet 22 has been seted up at the opposite side of preheating cabinet 2, air inlet 21 and the setting of gas outlet 22 symmetry, be connected with heat pipe 31 on air inlet 21, the one end that air inlet 21 was kept away from to heat pipe 31 is connected on the exhaust port of boiler, be connected with smoke exhaust pipe 32 on gas outlet 22, smoke exhaust pipe 32 can be connected with exhaust-gas treatment equipment.

When hot smoke and hot gas of the boiler enter the preheating box 2 from the heat conducting pipe 31, the upper part of the downcomer 10 can be preheated, so that cold water in the downcomer 10 can be preheated in advance, the use of subsequent fuels is reduced, waste gas for preheating the downcomer 10 can be discharged from the gas outlet 22, is guided into waste gas treatment equipment along the smoke exhaust pipe 32 for centralized treatment, and is discharged into the atmosphere after being treated to meet the environmental protection requirement.

Wherein, a guiding component for guiding the hot smoke in the preheating box 2 is arranged between the two inner sides of the preheating box 2 and the downcomer 10, and the guiding component can guide the hot smoke in the preheating box 2 towards the downcomer 10, so as to further increase the preheating effect of the preheating box 2 on the downcomer 10.

The heat conducting assembly of the present embodiment includes: vertical a plurality of installation section of thick bamboo 4 of installing in 2 inboard of preheating cabinet, installation section of thick bamboo 4 is located the both sides of air inlet 21 and gas outlet 22 respectively, the bar hole has been seted up along its extending direction in the outside of installation section of thick bamboo 4, horizontal sliding connection has a draw runner 41 in the both sides of preheating cabinet 2, draw runner 41 is parallel to each other with installation section of thick bamboo 4, all be connected with direction cloth 42 in the both sides of draw runner 41, one side that draw runner 41 was kept away from to direction cloth 42 penetrates in installation section of thick bamboo 4 from the bar hole, and simultaneously, install the piece of rolling up in installation section of thick bamboo 4, the rolling end of the piece of rolling up is connected with direction cloth 42 side, in this embodiment, the piece of rolling up can be clockwork spring (the same with the inside rolling structure of tape measure), the piece of rolling up or release can be carried out direction cloth 42 to the piece.

In addition, a driving member is installed in the preheating compartment 2, and the driving member can drive the slide bar 41 to move in the horizontal direction, wherein the driving member includes: horizontal screw thread passes through lead screw 43 of draw runner 41, and install servo motor 44 on preheating cabinet 2, servo motor 44's output shaft is fixed mutually with lead screw 43, when opening servo motor 44, can drive lead screw 43 and rotate, lead screw 43 is at rotatory in-process, can drive draw runner 41 and slide along the horizontal direction, draw runner 41 is when sliding, can cooperate with the rolling piece each other, adjust the direction cloth 42 elongation of draw runner 41 both sides, thereby can adjust the contained angle between the extension face of direction cloth 42 and the preheating cabinet 2 inboard, make servo motor 44 can adjust direction cloth 42 position according to actual conditions, the benefit of doing so lies in can making direction cloth 42 carry out better direction to hot cigarette, make hot cigarette blow to the downcomer 10 of keeping away from air inlet 21 one side as much as possible, make many downcomer 10 in preheating cabinet 2 be heated evenly as far as possible.

As shown in fig. 2 and 3, mounting blocks 5 are mounted at four corners of the preheating box 2, a supporting cylinder 51 is mounted on the mounting block 5, the supporting cylinder 51 and the down pipe 10 form a predetermined inclined angle, a sliding rod 52 is slidably inserted in the supporting cylinder 51, a compression spring 53 is fixed at an inner end of the sliding rod 52, one end of the compression spring 53, which is far away from the sliding rod 52, is connected to a bottom wall of the supporting cylinder 51, and the compression spring 53 can make use of its own elastic force to make the end of the sliding rod 52, which is far away from the supporting cylinder 51, abut against the guiding cloth 42, so that a surface of the guiding cloth 42, which is far away from the inner wall of the preheating box 2, protrudes outwards, which is beneficial for the guiding cloth 42 to guide hot gas to the direction of the down pipe 10.

In order to improve the guiding effect of the sliding rod 52 and enable the hot smoke to flow downwards to the descending pipe 10 in a wider range, a pressing roller 54 is vertically installed at the end of the sliding rod 52 far away from the supporting cylinder 51, and the pressing roller 54 and the installation cylinder 4 are parallel to each other.

In order to further increase the application range of the pressure roller 54, in this embodiment, an elastic member is disposed between the outer side of the support cylinder 51 and the inner side of the preheating box 2, the elastic member is a connection spring, one end of the connection spring is fixed to the inner wall of the preheating box 2, the other end of the connection spring is fixed to the outer side of the support cylinder 51, a pull wire 55 is fixed to a side of the support cylinder 51 away from the connection spring, one end of the pull wire 55, which is far away from the support cylinder 51, penetrates out of the outer side of the preheating box 2, a winding motor 56 is further installed at a predetermined position of the outer side of the preheating box 2, a winding wheel 57 is installed on an output shaft of the winding motor 56, and a penetrating end of the pull wire 55 is fixedly wound on the winding wheel 57.

When the included angle between the slide rod 52 and the inner wall of the preheating box 2 needs to be adjusted, the winding motor 56 can be started to drive the winding wheel 57 to rotate, the winding wheel 57 can be matched with the connecting spring in the rotating process to drive the supporting cylinder 51 to rotate around the mounting block 5, so that the inclination angle of the slide rod 52 can be conveniently adjusted, and the application range of the compression roller 54 is further enlarged

In addition, a heat insulation layer is further attached to one side of the guide cloth 42, which is away from the inner wall of the preheating box 2, so that the heat absorption of the guide cloth 42 can be reduced, the heat loss can be reduced, and more heat can be guided to the position of the downcomer 10 by the guide cloth 42.

All articulated have the guide vane 23 at preheating cabinet 2 top and bottom edge that are located air inlet 21, and be connected with buffer spring 24 between guide vane 23 and the preheating cabinet 2 inner wall, buffer spring 24 one end is connected with guide vane 23, the other end is connected on the inner wall of preheating cabinet 2, when hot cigarette gets into preheating cabinet 2, buffer spring 24 can utilize the elastic force to play certain cushioning effect to guide vane 23, make guide vane 23 swing along with the wind, be favorable to that steam is more dispersed blows to downcomer 10, and be unlikely to only blow towards downcomer 10 that is close to air inlet 21.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a boiler soda system waste heat utilization equipment which characterized in that includes: a steam drum (1) communicated with the economizer;

a plurality of down pipes (10) vertically arranged at the bottom of the steam drum (1);

the preheating box (2) is arranged at the bottom of the steam drum (1) and is used for a downcomer (10) to vertically penetrate through;

an air inlet (21) and an air outlet (22) which are arranged on two opposite sides of the preheating box (2);

a heat conduction pipe (31) with one end connected with the smoke outlet of the boiler and the other end connected with the air inlet (21);

a smoke exhaust pipe (32) with one end connected to the air outlet (22) and the other end extending to an external preset position;

and guiding components which are arranged at the two inner sides of the preheating box (2) and are used for guiding the hot smoke entering the preheating box (2),

the guide assembly includes: the mounting cylinder (4) is vertically arranged on the inner side of the preheating box (2) and is positioned on two sides of the air inlet (21) and the air outlet (22); and sliding strip (41) of extending direction sliding connection at preheating cabinet (2) both sides inner wall along perpendicular to downcomer (10), sliding strip (41) and installation cylinder (4) are parallel to each other, the bar hole has been seted up along its extending direction to installation cylinder (4) outer wall, install the piece of rolling up in installation cylinder (4), sliding strip (41) both sides all are connected with direction cloth (42), one side that sliding strip (41) were kept away from in direction cloth (42) is passed the bar hole and is connected with the rolling end of rolling up, still be equipped with the driving piece that is used for driving sliding strip (41) horizontal slip on preheating cabinet (2).

2. The waste heat utilization device of the boiler steam-water system according to claim 1, wherein the driving member comprises: the horizontal thread passes through a screw rod (43) of the slide bar (41); and a servo motor (44) which is arranged on the preheating box (2) and is used for driving the screw rod (43) to rotate.

3. The waste heat utilization device of the boiler steam-water system according to claim 1, characterized in that mounting blocks (5) are mounted at four corners of the preheating tank (2), a supporting cylinder (51) is obliquely mounted on the mounting blocks (5), a sliding rod (52) is slidably inserted in the supporting cylinder (51), and a compression spring (53) for driving the sliding rod (52) to slide along the inner wall of the supporting cylinder (51) to prop against the guide cloth (42) is arranged in the supporting cylinder (51).

4. The waste heat utilization device of the boiler steam-water system is characterized in that one end, far away from the support cylinder (51), of the slide rod (52) is provided with a press roller (54), and the extension direction of the press roller (54) is perpendicular to that of the support cylinder (51).

5. The waste heat utilization device of the boiler steam-water system according to claim 3, characterized in that the supporting cylinder (51) is hinged to the mounting block (5), an elastic member for connecting the supporting cylinder (51) and the preheating box (2) is arranged between the outer side of the supporting cylinder (51) and the inner side of the preheating box (2), one side of the supporting cylinder (51) far away from the elastic member is connected with a pull wire (55), a winding motor (56) is installed on the outer side of the preheating box (2), and a winding wheel (57) for winding the pull wire (55) is installed on an output shaft of the winding motor (56).

6. The waste heat utilization device of the boiler steam-water system according to claim 1, characterized in that the preheating tank (2) is hinged with guide fins (23) at the top and bottom edges of the air inlet (21), and a buffer spring (24) is connected between the guide fins (23) and the inner wall of the preheating tank (2).

7. The waste heat utilization device of the boiler steam-water system according to claim 1, characterized in that a heat insulation layer is adhered to one side of the guide cloth (42) away from the preheating tank (2).