CN210951846U

CN210951846U - Double-drum double-burnout-chamber reciprocating boiler

Info

Publication number: CN210951846U
Application number: CN201921272855.4U
Authority: CN
Inventors: 杨国忠; 苏国旗; 张平; 张翠晶; 张衣
Original assignee: Harbin Dongtai Environmental Protection Boiler Co ltd
Current assignee: Harbin Dongtai Environmental Protection Boiler Co ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-07-07
Anticipated expiration: 2029-08-07

Abstract

The utility model discloses a two burn-off chamber reciprocating boiler of two drums, including boiler body, furnace, economizer, reciprocal grate, its characterized in that: the boiler is characterized in that a boiler wall is arranged on the boiler body, a front arch and a rear arch are arranged on the boiler wall, a front arch collecting box is arranged on the front arch, a rear arch collecting box is arranged on the rear arch, a hearth is arranged between the front arch and the rear arch, left and right side walls are arranged in the middle of the outer part of the hearth, a coal hopper is arranged at the left end, a side upper collecting box is arranged at the upper end, and a leading-out pipe is arranged in the side upper collecting box; the boiler efficiency is high; the boiler output is unchanged for the whole life, the efficiency is unchanged for the whole life, the environmental protection effect of the boiler is good, the dust fall effect in the boiler is obvious, and the original emission concentration is lower than 20-30% specified by the state; the boiler adopts a reciprocating pushing grate layer combustion mode, so that the ash layer of the combustion ash is thick, and the air leakage of the hearth is reduced.

Description

Double-drum double-burnout-chamber reciprocating boiler

Technical Field

The utility model relates to a boiler manufacturing technical field especially relates to a two burn out chamber reciprocating boiler of two drums.

Background

The boiler water of the drum type hot water boiler is mostly formed by refitting a steam boiler in the early stage, and the boiler water is naturally circulated in the boiler. In order to ensure the safety and reliability of boiler water circulation, the boiler needs to have a certain height, so that the boiler has larger volume and relatively higher steel consumption and manufacturing cost. However, because the water outlet capacity of the boiler is large and natural circulation can be maintained, when the circulating pump of the system is suddenly stopped, the boiler water can be effectively prevented from being vaporized. For this reason, natural circulation hot water boilers are rapidly developed in our country.

However, the existing hot water boiler is found to have the problem of serious accumulated ash after running for a certain time, so that the output power and the heat efficiency are reduced year by year, the accumulated ash is difficult to remove, and the maintenance is difficult; the existing boiler front arch and rear arch have consistent length and consistent inclination angle, which results in low energy utilization rate.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the energy utilization rate is low due to the fact that the lengths of the front arch and the rear arch are consistent and the inclined angles are consistent, the double-drum double-burnout-chamber reciprocating boiler is further provided.

The utility model discloses a realize through following technical scheme: a double-drum double-burnout-chamber reciprocating boiler comprises a boiler body, a hearth, an economizer and a reciprocating grate, wherein a boiler wall is arranged on the boiler body, a front arch and a rear arch are arranged on the boiler wall, a front arch collection box is arranged on the front arch, a rear arch collection box is arranged on the rear arch, the hearth is arranged between the front arch and the rear arch, a left side wall and a right side wall are arranged in the middle of the outer part of the hearth, a coal hopper is arranged at the left end of the outer part of the hearth, a side upper collection box is arranged at the upper end of the outer part of the hearth, a lead-out pipe is arranged in the side upper collection box, a combustion chamber front water-cooling wall, a burnout chamber I, a combustion chamber rear water-cooling wall and a burnout chamber II are arranged in the middle of the inner part of the boiler body, the upper drum is provided with a water outlet, a down pipe and a water inlet, a convection pipe bundle is arranged at the lower end of the upper drum, the, the boiler comprises a hearth, a first burnout chamber, a first boiler barrel, a second boiler barrel, a lower boiler barrel, a front arch collecting box, a rear arch collecting box, a side lower collecting box, a left side wall and a right side wall, wherein the hearth is communicated with the first burnout chamber through the front arch, the front arch collecting box, the rear arch collecting box, the side lower collecting box, the left side wall and the right side wall, the left end and the right end of the first burnout chamber are respectively connected with a front water-cooled wall of a combustion chamber and a rear water-cooled wall of the combustion chamber, the rear water-cooled wall of the combustion chamber is communicated with the upper boiler barrel through a second burnout chamber, the upper boiler barrel is communicated with the side upper collecting box through.

A backwater injection pipe is arranged in the upper boiler barrel, the lower end of the backwater injection pipe is communicated with a descending pipe,

the circulating water quantity is increased by injecting backwater, and according to the theory of fluid mechanics, the dynamic pressure head 2p omega is used for fluid flow²The sum of/2 and the static pressure P is constant. When higher flow rates ω are used, 2p ω²And/2 is increased, P is reduced at the moment, water flows to a place with lower static pressure from a place with higher static pressure, and the circulating water quantity of the downcomer is increased to ensure that the working medium in the water wall pipe has enough flow velocity, so that the temperature of the pipe wall is not greater than an allowable value.

The inner diameter of the upper boiler barrel is 1500mm, the wall thickness is 30mm, the barrel length is 11m, the inner diameter of the lower boiler barrel is 1300mm, the wall thickness is 26mm, and the barrel length is 9 m. So set up, hot water flow is even between the drum, and the thermal efficiency is high.

Has the advantages that: the utility model has simple structure and convenient use, and the boiler has enough output; the boiler efficiency is high; the boiler output is unchanged for the whole life, the efficiency is unchanged for the whole life, the environmental protection effect of the boiler is good, the dust fall effect in the boiler is obvious, and the original emission concentration is lower than 20-30% specified by the state; the boiler adopts a reciprocating pushing grate layer combustion mode, so that the ash layer of the combustion ash is thick, and the air leakage of the hearth is reduced.

Drawings

Fig. 1 is a schematic structural view of a double-drum double-burnout-chamber reciprocating boiler of the present invention.

FIG. 2 is a schematic structural diagram of the double-drum double-burnout-chamber reciprocating boiler with backwater injection of the present invention.

The boiler comprises a boiler body 1, a boiler wall 2, a hearth 3, a side upper header 4, a side left wall 5, a side right wall 6, a front arch 7, a rear arch 8, a downcomer 9, a coal hopper 10, a front arch header 11, a reciprocating grate 12, a combustion chamber front water-cooling wall 13, a combustion chamber rear water-cooling wall 14, an outlet pipe 15, a burnout chamber I16, a burnout chamber II 17, an upper boiler 18, a lower boiler 19, a convection tube bundle 19, a water outlet 20, a water inlet 21, a coal economizer 22, a rear arch header 23, a side lower header 24 and a return water injection pipe 25.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1-2, a double-drum double-burnout-chamber reciprocating boiler comprises a boiler body 1, a hearth 3, an economizer 22 and a reciprocating grate 11, wherein a boiler wall 2 is arranged on the boiler body 1, a front arch 6 and a rear arch 7 are arranged on the boiler wall 2, a front arch collection box 10 is arranged on the front arch 6, a rear arch collection box 23 is arranged on the rear arch 7, the hearth 3 is arranged between the front arch 6 and the rear arch 7, left and right side walls 5 are arranged in the middle of the outside of the hearth 3, a coal hopper 9 is arranged at the left end, an upper side collection box 4 is arranged at the upper end, an outlet pipe 14 is arranged in the upper side collection box 4, a front water-cooling wall 12 of a combustion chamber, a first burnout chamber 15, a rear water-cooling wall 13 of the combustion chamber, a second burnout chamber 16 is arranged in the middle of the boiler body 1, an upper drum 17 is arranged in the boiler body 1, a water outlet 20 is arranged on the upper drum, a down pipe 8 and a water inlet 21, The lower end of the convection tube bundle 19 is provided with a lower drum 18, the right end of the lower drum 18 is provided with an economizer 22, the coal hopper 9 is communicated with the hearth 3 through a reciprocating grate 11, the hearth 3 is communicated with a first burnout chamber 15 through a front arch 6, a front arch header 10, a rear arch 7, a rear arch header 23, a side lower header 24, a left side wall and a right side wall 5, the left end and the right end of the first burnout chamber 15 are respectively connected with a front water-cooled wall 12 of a combustion chamber and a rear water-cooled wall 13 of the combustion chamber, the rear water-cooled wall 13 of the combustion chamber is communicated with an upper drum 17 through a second burnout chamber 16, the upper drum 17 is communicated with the side upper header 4 through an outlet tube 14, the upper end of the upper drum 17 is fixedly connected with a water outlet 20, a water inlet 21 and a down tube 8, the upper drum 17 is communicated with the lower drum 18 through the convection tube bundle 19, and the right end of.

The upper boiler barrel 17 is internally provided with 4 backwater injection pipes 25, the lower ends of the backwater injection pipes 25 are communicated with a downcomer 8,

The inner diameter of the upper boiler barrel 17 is 1500mm, the wall thickness is 30mm, the barrel length is 11m, the inner diameter of the lower boiler barrel is 1300mm, the wall thickness is 26mm, and the barrel length is 9 m. So set up, hot water flow is even between the drum, and the thermal efficiency is high.

The working process and principle of the invention are as follows:

coal fuel enters from a coal hopper 9 and is combusted on a reciprocating grate 11, the heat of flue gas obtained by combustion is firstly absorbed by a hearth 3 through a front arch 6, a rear arch 7 and left and right side walls 5, the flue gas sequentially passes through a shaft channel, the heat is sequentially absorbed by shaft part side walls of a first burnout chamber 15, a second burnout chamber 16 and the left and right side walls 5, the temperature of exhaust smoke is reduced to about 150 ℃ through a convection bank 19 and an economizer 22, and then the exhaust smoke is discharged out of the furnace.

The water circulation flow of the boiler is as follows:

the feed water is fed into the cold end of the upper boiler barrel 17 through the outlet header of the coal economizer 22, and then a part of the feed water is fed into the front arch header 10, the rear arch header 23 and the side lower header 24 through the downcomer 8, the headers absorb heat through the heat exchange tubes of the front arch 6, the rear arch 7 and the left and right side walls 5 and then are fed into the upper boiler barrel 17 and the side upper header 4, and the headers are fed into the upper boiler barrel 17 through the outlet pipe 14. The other part enters the lower drum 18 through the cold end of the convection bank 19, enters the upper drum 17 through the hot end of the convection bank 19 after being heated, and gives out hot water with qualified parameters through the water outlet 20.

Claims

1. The utility model provides a two reciprocating boiler of burn-out chamber of two drums, includes boiler body, furnace, economizer, reciprocating grate, its characterized in that: the boiler is characterized in that a boiler wall is arranged on the boiler body, a front arch and a rear arch are arranged on the boiler wall, a front arch collection box is arranged on the front arch, a rear arch collection box is arranged on the rear arch, a hearth is arranged between the front arch and the rear arch, the left side wall and the right side wall are arranged in the middle of the outer portion of the hearth, a coal hopper is arranged at the left end, a side upper collection box is arranged at the upper end, a lead-out pipe is arranged inside the side upper collection box, a combustion chamber front water-cooling wall, a burnout chamber I, a combustion chamber rear water-cooling wall and a burnout chamber II are arranged in the middle of the inner portion of the boiler body, an upper boiler barrel is arranged at the right end of the inner portion of the boiler body, a water outlet, a down pipe and a water inlet are arranged on the upper boiler barrel, a convection pipe bundle is arranged at the lower end of the upper boiler barrel, an economizer is arranged at the right end of the lower boiler barrel, the, The left side wall and the right side wall are communicated with the first burnout chamber, the left end and the right end of the first burnout chamber are respectively connected with a front water-cooled wall of the combustion chamber and a rear water-cooled wall of the combustion chamber, the rear water-cooled wall of the combustion chamber is communicated with the upper drum through the second burnout chamber, the upper drum is communicated with the upper header on the side through an eduction tube, the upper end of the upper drum is fixedly connected with a water outlet, a water inlet and a down tube, the upper drum is communicated with the lower drum through a convection tube bundle, and the right end of the lower drum is fixedly connected with an economizer.

2. The double-drum double-burnout-chamber reciprocating boiler according to claim 1, wherein: the upper boiler barrel is internally provided with a backwater injection pipe, and the lower end of the backwater injection pipe is communicated with a descending pipe.

3. The double-drum double-burnout-chamber reciprocating boiler according to claim 1, wherein: and the circulating water amount is increased by adopting backwater injection.

4. The double-drum double-burnout-chamber reciprocating boiler according to claim 1, wherein: the inner diameter of the upper boiler barrel is 1500mm, the wall thickness is 30mm, the barrel length is 11m, the inner diameter of the lower boiler barrel is 1300mm, the wall thickness is 26mm, and the barrel length is 9 m.