CN209263353U - A kind of three backhaul atmospheric combustion mode of double liners condenses gas displacement type water heater - Google Patents

Abstract

The utility model discloses a kind of double three backhaul atmospheric combustion modes of liner to condense gas displacement type water heater, water tank includes upper water box and lower header, high temperature flue is equipped among the lower header, high temperature flue is the first backhaul high temperature heat transfer zone, it is the second backhaul medium temperature heat transfer zone that exhaust gases passes are formed by between the upper water box and lower header, closed intermediate collet is arranged in the upper water box periphery, and the exhaust gases passes formed between intermediate collet and upper water box are third backhaul condensing heat-exchange area.One heat exchange area of gas furnace of traditional atmospheric combustion mode is arranged to three heat exchange areas by the utility model, heat exchange area increases 2.76 times than the gas furnace heat exchange area of atmospheric combustion mode, than improving 15% or more on the basis of the gas furnace heat exchange efficiency 90% of traditional atmospheric combustion mode, 30% is promoted than the thermal efficiency as defined in national standard GB 18111~2000, heat exchange efficiency can achieve 105%(with the calculating of natural gas low heat value).

Description

A kind of three backhaul atmospheric combustion mode of double liners condenses gas displacement type water heater

Technical field

The utility model relates to a kind of gas water-heating furnaces, and in particular to a kind of double three backhaul atmospheric combustion modes of liner condense Gas displacement type water heater.

Background technique

Currently, there are many offer bath hot water and the equipment of heating, such as electric heater, Teat pump boiler, solar water Device, gas furnace etc..When the gas furnace operation of existing atmospheric combustion mode, since the exhaust gas temperature of gas furnace is at 140~250 DEG C Between, heat loss is very big, therefore the combustion gas efficiency of furnace of atmospheric combustion mode is usually no more than 90%.In order to improve the thermal efficiency, people Develop the condensing gas furnace of premixed power gas mode a kind of, premixed condensing gas furnace is by increasing heating surface, drop The means such as low coefficient of excess air reduce the steam-laden part latent heat of institute in exhaust gas temperature recovered flue gas, the thermal efficiency can be improved 15%, reach 105% or so (with the calculating of natural gas low heat value).Although premixed condensing gas furnace improves the thermal efficiency, but with it is big The gas furnace of gas combustion system compares, and burner structure is complicated, at high cost, poor reliability, high failure rate, to participation combustion air Quality requirements it is higher, have certain requirement to the technical ability of operator, and it is big to run noise.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of double three backhaul atmospheric combustion modes of liner to condense combustion One heat exchange area of gas furnace of traditional atmospheric combustion mode is arranged to three heat exchange areas, changed by air space formula water heater Heat area increases 2.76 times than the gas furnace heat exchange area of atmospheric combustion mode, atmospheric combustion side more higher than traditional thermal efficiency 15% or more is improved on the basis of the gas furnace heat exchange efficiency 90% of formula, is promoted than the thermal efficiency as defined in national standard GB 18111~2000 30%, heat exchange efficiency can achieve 105%(with the calculating of natural gas low heat value).

The utility model technical scheme applied to solve the technical problem is: a kind of double three backhaul atmospheric combustion modes of liner Gas displacement type water heater, including positive displacement hot water furnace body are condensed, is equipped with water tank and combustion in the positive displacement hot water furnace body Room is burnt, balance petticoat pipe is equipped at the top of the positive displacement hot water furnace body, balance petticoat pipe is equipped with air inlet and smoke outlet, participates in combustion The air of burning enters combustion chamber by air intake passage, is equipped with atmospheric gas device in the combustion chamber, atmospheric gas device is by firing Gas control valve control, the water tank include upper water box and lower header, are equipped with high temperature flue, high temperature cigarette among the lower header Gas channel is the first backhaul high temperature heat transfer zone, is fixed between the upper water box and lower header by connecting support plate, the upper water It is the second backhaul medium temperature heat transfer zone that exhaust gases passes are formed by between case and lower header, and the upper water box periphery is arranged in closed Between collet, the exhaust gases passes formed between intermediate collet and upper water box be third backhaul condensing heat-exchange area, in intermediate collet Bottom is equipped with condensate drain outlet, and the condensate drain outlet is communicated by the water seal that U-tube is formed with atmosphere；The upper water box Top is equipped with export mouth, and the export mouth is connected to by diversion pipe with introducing port；The upper water box lower part is equipped with upper water box originally Water water inlet, the upper box part that is lauched is equipped with lower header hot water outlet；The upper water box tap water water inlet connects tap water Water inlet interface, the lower header hot water outlet connect mixed hot water water outlet mouthpiece；The tap water water inlet interface and the heat of mixing Connecting tube and throttling set are set between water water outlet mouthpiece.

As a further improvement, the intermediate collet periphery is equipped with external jacket, is formed between external jacket and intermediate collet Channel be air preheat channel, air preheat upper part of channel communicates with air inlet, and lower part is communicated with air intake passage.

As a further improvement, smoke barrier is equipped in the high temperature flue.

As a further improvement, the balance petticoat pipe at the top of the positive displacement hot water furnace body may be configured as coaxial smoke pipe or Blower unit.

It is suitable for outdoor mounted when the utility model is using balance petticoat pipe, is suitable for when using coaxial smoke pipe or blower unit Indoor location.

The beneficial effects of the utility model are: the utility model is controlled water temperature using two relatively independent water tanks Two different temperature regions: 1. high temperature waters areas；2. cryo-water area, cryo-water area and tail flue gas exchange heat to form condensation Heat transfer zone.The design of two water tanks solves the heat transfer problem of low-temperature flue gas, heat exchange area is effectively divided into three regions: 1. High temperature heat transfer zone (avoids condensed water from forming the influence to combustion conditions)；2. medium temperature heat transfer zone；3. cryogenic condensation heat transfer zone.Three Region is interconnected and relatively independent, and the setting of cryogenic condensation heat transfer zone can prevent condensation flow to medium temperature and high temperature from exchanging heat Area, and will be emitted into outside furnace after condensed water tissue by discharge outlet.The utility model is divided into the heat-transfer surface behind three heat exchange areas Product increases 2.76 times than traditional technology heat exchange area, for 15 degrees Celsius of inflow temperature, independent cryogenic condensation heat transfer zone Exhaust gas temperature can be controlled between 25-57 degree, reach condensation effect, the gasification for forming vapor after the burning of natural gas is latent Heat is fully absorbed, and 15% or more heat exchange efficiency at least can be improved, and heat exchange efficiency can achieve 105%(in terms of natural gas low heat value It calculates).

Detailed description of the invention

Fig. 1 is the external structure schematic diagram of the utility model embodiment.

Fig. 2 is the schematic cross-sectional view one of the utility model embodiment.

Fig. 3 is the schematic cross-sectional view two of the utility model embodiment.

The utility model is described further with reference to the accompanying drawing.

Specific embodiment

In conjunction with shown in attached drawing 1,2 and 3, a kind of double three backhaul atmospheric combustion modes of liner condense gas displacement type water heater, Positive displacement hot water furnace body 1 including vertical, the positive displacement hot water furnace body 1 is interior to be equipped with upper and lower concatenated upper water box 7 It is fixed by connection support plate 24 between the upper water box 7 and lower header 13 with lower header 13；The positive displacement hot water furnace body 1 top is equipped with balance petticoat pipe 2, and balance petticoat pipe 2 is equipped with smoke outlet 6 and air inlet 5.Air is pre- into air by air inlet 5 The passage of heat enters back into air intake passage 17 and reaches combustion chamber 14, is equipped with atmosphere gas apparatus 15, atmosphere gas apparatus in the combustion chamber 14 15 are controlled by gas control valve 16, and the upper water box 7 is externally provided with integral heat preservation layer 8 with lower header 13；In the lower header 13 Between be equipped with high temperature flue 11, high temperature flue 11 is the first backhaul high temperature heat transfer zone, is equipped in the exhaust gases passes 11 Smoke barrier 12.Be formed by between the upper water box 7 and lower header 13 exhaust gases passes be the second backhaul medium temperature heat transfer zone, it is described on Closed intermediate collet 9 is arranged in 7 periphery of water tank, and the exhaust gases passes formed between intermediate collet 9 and upper water box 7 are third backhaul Condensing heat-exchange area is equipped with condensate drain outlet 20 in the bottom of intermediate collet 9, and the condensate drain outlet 20 passes through U-tube shape At water seal communicated with atmosphere；7 top of upper water box is equipped with export mouth 26, and the export mouth 26 is by diversion pipe 25 and imports Mouth 22 is connected to.9 periphery of intermediate collet is equipped with external jacket 4, and the channel formed between external jacket 4 and intermediate collet 9 is air Preheating channel, air preheat upper part of channel are communicated with air inlet 5, and lower part is communicated with air intake passage 17.7 lower part of upper water box is set There is upper water box tap water water inlet 19,13 top of lower header is equipped with lower header hot water outlet 21；The upper water box is originally Water water inlet 19 connects tap water water inlet interface 27, and the lower header hot water outlet 21 connects mixed hot water water outlet mouthpiece 10； Connecting tube 23 and throttling set 3 are set between the tap water water inlet interface 27 and mixed hot water water outlet mouthpiece 10；The upper water 7 top of case and 13 top of lower header are equipped with TP safety valve 18.

As shown in Figure 2, when water temperature is lower than set temperature, atmospheric burner 15 is automatic for the utility model flue gas trend It lights, high-temperature flue gas enters the first backhaul high temperature heat transfer zone, by the way that the high temperature flue 11 of smoke barrier 12 is arranged to lower header Water in 13 is heated, subsequently into the second backhaul medium temperature heat transfer zone, by upper lower header end face respectively to upper lower header into Row heating (according to watt level difference, the end face of upper water box and lower header can increase metal welding nail extended surface), subsequently Flue gas enters third backhaul condensing heat-exchange area by the joint gap of upper lower header, by the outer wall of upper water box to upper water box 7 into Row heating (according to watt level difference, upper water box surface can increase metal welding nail extended surface).Due to the first backhaul and Major heat is absorbed by lower header in the heating process of two return, and 7 water temperature of upper water box is lower than 13 water temperature of lower header, therefore, is entered The low-temperature flue gas of third backhaul can high temperature area opposite with the progress heat exchange of upper water box water at low temperature and the heat exchange area of low-temperature region Large percentage, ensure that exhaust gas temperature only 10 degrees centigrade higher than upper water box water temperature.With feed temperature 15 when furnace lifting For degree Celsius, for exhaust gas temperature in 25 degrees centigrades, end of run, 13 temperature of lower header is 75 degrees Celsius, 7 temperature of upper water box Degree is 49 degrees Celsius, and exhaust gas temperature is 59 degrees Celsius, and entire combustion process exhaust gas temperature control is in condensation section.Flue gas enters the The smoke outlet 6 being arranged after three backhauls condensation through balance petticoat pipe 2 is discharged.

In order to make full use of the heat of third backhaul condensing heat-exchange area tail flue gas, the air for participating in burning enters air inlet The 5 air preheat channels through being formed between external jacket 4 and intermediate collet 9, enter air intake passage 17, subsequently into burning after preheating Room 15 participates in burning, improves ignition temperature, achievees the purpose that improve the thermal efficiency.

The utility model healed water trend uses penstock as shown in Figure 3, when user's opening end, in tap water Under pressure, is entered by tap water water inlet interface 27, hot water is discharged from mixed hot water water outlet mouthpiece 10.Wherein enter tap water The tap water of water inlet interface 27 is divided into two tunnels, and tap water enters 7 bottom of upper water box by upper water box tap water water inlet 19 all the way Portion, by the water of upper water box 7, through the outflow of export mouth 26, (water temperature that being designed in this way can ensure that in upper water box, which is consistently lower than, is lauched box temperature Degree, it is ensured that the heat transfer effect of third backhaul when operation), the water that export mouth 26 flows out is introduced through diversion pipe 25 by introducing port 22 The hot water of lower header is discharged 13 bottom of lower header through lower header hot water outlet 21；Another way tap water passes through connecting tube 23 After being mixed with throttling set 3 with the hot water that lower header hot water outlet 21 is discharged, it is discharged through mixed hot water water outlet mouthpiece 10.

Claims (4)

1. a kind of three backhaul atmospheric combustion mode of double liners condenses gas displacement type water heater, including positive displacement hot water furnace body (1), water tank and combustion chamber (14), positive displacement hot water furnace body (1) top are equipped in the positive displacement hot water furnace body (1) Equipped with balance petticoat pipe (2), balance petticoat pipe (2) is equipped with air inlet (5) and smoke outlet (6), and the air for participating in burning passes through air inlet Channel (17) enters combustion chamber (14), is equipped with atmospheric gas device (15) in the combustion chamber (14), atmospheric gas device (15) It is controlled by gas control valve (16), it is characterised in that: the water tank includes upper water box (7) and lower header (13), the lower header (13) intermediate to be equipped with high temperature flue (11), high temperature flue (11) is the first backhaul high temperature heat transfer zone, the upper water box (7) fixed by connection support plate (24) between lower header (13), it is formed between the upper water box (7) and lower header (13) Exhaust gases passes be the second backhaul medium temperature heat transfer zone, closed intermediate collet (9) is arranged in the upper water box (7) periphery, in centre The exhaust gases passes formed between collet (9) and upper water box (7) are third backhaul condensing heat-exchange area, in the bottom of intermediate collet (9) Equipped with condensate drain outlet (20), the condensate drain outlet (20) is communicated by the water seal that U-tube is formed with atmosphere；On described Water tank (7) top is equipped with export mouth (26), and the export mouth (26) is connected to by diversion pipe (25) with introducing port (22)；On described Water tank (7) lower part is equipped with upper water box tap water water inlet (19), and lower header (13) top is equipped with lower header hot water outlet (21)；The upper water box tap water water inlet (19) connects tap water water inlet interface (27), the lower header hot water outlet (21) mixed hot water water outlet mouthpiece (10) are connected；Between the tap water water inlet interface (27) and mixed hot water water outlet mouthpiece (10) Connecting tube (23) and throttling set (3) are set.

2. double three backhaul atmospheric combustion modes of liner as described in claim 1 condense gas displacement type water heater, feature exists In: intermediate collet (9) periphery is equipped with external jacket (4), and the channel formed between external jacket (4) and intermediate collet (9) is sky Gas preheating channel, air preheat upper part of channel are communicated with air inlet (5), and lower part is communicated with air intake passage (17).

3. double three backhaul atmospheric combustion modes of liner as described in claim 1 condense gas displacement type water heater, feature exists In: smoke barrier (12) are equipped in the high temperature flue (11).

4. the three backhaul atmospheric combustion mode of double liners as described in claims 1 to 3 is any condenses gas displacement type water heater, Be characterized in that: the balance petticoat pipe (2) at the top of the positive displacement hot water furnace body (1) may be configured as coaxial smoke pipe or blower unit.