CN203404964U - Horizontal-type internal combustion fire tube hot water boiler capable of achieving flameless combustion in compact arrangement mode - Google Patents

Abstract

The utility model relates to a horizontal-type internal combustion fire tube hot water boiler capable of achieving flameless combustion in a compact arrangement mode. The boiler comprises a boiler shell (2), boiler furnaces, a combustor (1), a smoke box (5), a flue tube convection bank (6) and a boiler flue gas outlet (7). The combustor (1) is a flameless combustor; the boiler furnaces include the one-return-stroke boiler (3) and the two-return-stroke boiler (4), the one-return-stroke boiler (3), the two-return-stroke boiler (4) and the flue tube convection bank (6) are all arranged in the boiler shell (2), the smoke box (5) is arranged on the front portion of the boiler shell (2), the boiler flue gas outlet (7) is formed in the rear portion of the boiler shell (2), the two ends of the two-return-stroke boiler (4) are communicated with the one-return-stroke boiler (3) and the smoke box (5) respectively, the flue tube convection bank (6) is arranged below the two-return-stroke boiler (4) and the two ends of the flue tube convection bank (6) are communicated with the smoke box (5) and the boiler flue gas outlet (7) respectively. The boiler is high in combustion efficiency and small in occupied area, service life of a heated surface is long, and exhausting of NOX and CO is effectively controlled.

Description

Flameless combustion compact Layout horizontal internal combustion fire pipe water heating boiler

Technical field

The utility model relates to a kind of horizontal internal combustion fire pipe water heating boiler.Belong to heating equipment technical field.

Background technology

In order to adapt to the sustainable development of national economy and the requirement of environmental protection, coal type fuel is progressively changed into oil, gas type fuel.Oil, gas type fuel are easy to carry and use, and are guaranteeing, under good burning condition, substantially not produce environmental pollution, and calorific capacity is high, and this makes fuel-oil or fuel-gas boiler realize operation automation, high efficiency.In recent years, because oil-burning gas-fired boiler is small, automaticity is high, easy for installation, and under various heating agents, can obtain very convenient and application flexibly, oil-burning gas-fired boiler has obtained developing widely and applying.And horizontal internal combustion fire tube water heater substantially to adopt oil, gas be fuel, and due to heating surface compact in design, boiler efficiency is high, floor space is also less than normal, transportation and install also relatively convenient, cause market to the demand of this boiler in continuous raising.

The heating surface of horizontal internal combustion fire pipe water heating boiler is mainly comprised of flue and convection current smoke pipe, after fuel burns in flue, generates high-temperature flue gas, then through heating surfaces such as convection current smoke pipes, finally enters atmosphere.

China's horizontal internal combustion fire pipe water heating boiler, some problems of ubiquity, for example the tube sheet work under bad environment of return combustion chamber smoke collecting tube causes tube sheet easily to ftracture, and local heat load causes too greatly smoke pipe easily to burn out, and during flame combustion, central temperature is too high, causes NO _xthe phenomenons such as discharge rising, and owing in " pot rule " and relevant regulations, the specification of the flue of horizontal internal combustion multitubular boiler and return combustion chamber being had to upper limit requirement, so the power of traditional horizontal internal combustion fire pipe water heating boiler is difficult to break through 14MW on present market.

Utility model content

The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of efficiency of combustion high, and floor space is little, heating surface long service life, NO _x, CO discharge also obtained the horizontal internal combustion fire pipe water heating boiler of effective control.

The purpose of this utility model is achieved in that a kind of flameless combustion compact Layout horizontal internal combustion fire pipe water heating boiler, comprise shell, flue, burner, smoke box, smoke pipe convection bank and boiler flue gas outlet, described horizontal-housing type is arranged, it is characterized in that: described burner adopts flameless burner, described flue comprises a backhaul flue and two return flue, one backhaul flue, two return flue and smoke pipe convection bank are all arranged in shell, smoke box is arranged at shell front portion, boiler flue gas outlet is arranged at shell rear portion, one backhaul flue is placed in shell internal upper part, two return flue is arranged at a backhaul flue below, two return flue two ends are connected with a backhaul flue and smoke box respectively, smoke pipe convection bank is placed in two return flue below, its two ends are connected with smoke box and boiler flue gas outlet 7 respectively.

With respect to traditional flue of fire tube boiler, only has a backhaul, in order to be beneficial to the high temperature gases recirculating of burning generation, mix with fuel and air, the flue of the second backhaul is smaller than the flue diameter of the first backhaul, when fuel burns in burner hearth, flame disperse does not have concrete shape at whole burner hearth, be conducive to like this radiant heat transfer, also do not exist flame kernel excess Temperature to cause the NO generating _xthe phenomenon increasing, flameless combustion temperature is generally 1300 ℃ of left and right, whole furnace heating surface thermic load is average, can be because of the excessive phenomenon that causes local scaling of local heat load, the layout of two backhaul burner hearths has also effectively been improved the working environment of smoke pipe and tube sheet, greatly reduce the import cigarette temperature of smoke pipe, the boiler of same power in addition, the floor space of flameless combustion compact Layout horizontal internal combustion fire pipe water heating boiler is smaller.

The beneficial effects of the utility model are:

1, boiler adopts flameless combustion technology, efficiency of combustion is high, there is not the insufficient phenomenon of burning, in burner hearth, flame abundant intensity is good, and volume heat load is large, but temperature and heating surface heat load distribution are even, be conducive to radiant heat transfer, and whole burner hearth is heated evenly, avoided because the inhomogeneous burner hearth material that causes of being heated produces internal stress, the security that has improved boiler.The NO that burning produces _x, CO etc. has the product of pollution less, conventional boiler volume is less than normal relatively.

2, aphlogistic theoretical temperature combustion is low, generally 1300 ℃ of left and right, has effectively controlled and because ignition temperature is high, has caused boiler NO _xthe phenomenon that discharge increases.

3, the first two backhaul is flue, and the 3rd backhaul is smoke pipe convection bank, has effectively controlled the inlet temperature of smoke pipe, has improved the working environment of smoke pipe and tube sheet, effectively prevents the generation because of operating temperature too high smoke pipe booster phenomenon and tube sheet cracking phenomenon.

4,, due to good effect of heat exchange, the heating surface that the boiler of same power needs is less than conventional fire pipe water heating boiler.

5, because flameless combustion compact Layout horizontal internal combustion fire pipe water heating boiler is less than the common fire pipe water heating boiler of routine under exerting oneself equally, so under same profile, exerting oneself of flameless combustion compact Layout horizontal internal combustion fire pipe water heating boiler is larger, makes like this fire pipe water heating boiler can accomplish 21MW.

6, the flue gas that fuel and air produce in burner hearth internal combustion pass through successively the first backhaul flue in shell, the second backhaul flue, smoke box, smoke pipe convection bank, flue-gas temperature at the exhaust gas temperature of the hot-water boiler of 95 ℃ of water outlets below 160 ℃, so reached energy-efficient effect completely, high-efficiency energy-saving horizontal boiler common the heat output that can find out whole boiler from exhaust gas temperature and market is now looked into seldom even higher.

Accompanying drawing explanation

Fig. 1 is the general structure schematic diagram of the utility model flameless combustion compact Layout horizontal internal combustion fire pipe water heating boiler.

Reference numeral in figure:

Burner 1

Shell 2

One backhaul flue 3

Two return flue 4

Smoke box 5

Smoke pipe convection bank 6

Boiler flue gas outlet 7.

The specific embodiment

Referring to Fig. 1, Fig. 1 is the general structure schematic diagram of the utility model flameless combustion compact Layout horizontal internal combustion fire pipe water heating boiler.As seen from Figure 1, the utility model flameless combustion compact Layout horizontal internal combustion fire pipe water heating boiler, is mainly comprised of burner 1, shell 2, a backhaul flue 3, two return flue 4, smoke box 5, smoke pipe convection bank 6 and boiler flue gas outlet 7.Described burner 1 adopts flameless burner.The horizontal layout of described shell 2, one backhaul flue 3, two return flue 4 and smoke pipe convection bank 6 are all arranged in shell 2, smoke box 5 is arranged at shell 2 front portions, boiler flue gas outlet 7 is arranged at shell 2 rear portions, one backhaul flue 3 is placed in shell 2 internal upper parts, two return flue 4 is arranged at backhaul flue 3 belows, two return flue 4 two ends are connected with a backhaul flue 3 and smoke box 5 respectively, smoke pipe convection bank 6 is placed in two return flue 4 belows, and its two ends are connected with smoke box 5 and boiler flue gas outlet 7 respectively.

Claims (1)

1. a flameless combustion compact Layout horizontal internal combustion fire pipe water heating boiler, comprise shell (2), flue, burner (1), smoke box (5), smoke pipe convection bank (6) and boiler flue gas outlet (7), the horizontal layout of described shell (2), it is characterized in that: described burner (1) adopts flameless burner, described flue comprises a backhaul flue (3) and two return flue (4), one backhaul flue (3), two return flue (4) and smoke pipe convection bank (6) are all arranged in shell (2), smoke box (5) is arranged at shell (2) front portion, boiler flue gas outlet (7) is arranged at shell (2) rear portion, one backhaul flue (3) is placed in shell (2) internal upper part, two return flue (4) is arranged at backhaul flue (3) below, two return flue (4) two ends are connected with a backhaul flue (3) and smoke box (5) respectively, smoke pipe convection bank (6) is placed in two return flue (4) below, its two ends are connected with smoke box (5) and boiler flue gas outlet (7) respectively.

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