CN201753916U - Tail low-resistance heat exchanger for pressure-fired fuel oil and gas boiler - Google Patents
Tail low-resistance heat exchanger for pressure-fired fuel oil and gas boiler Download PDFInfo
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- CN201753916U CN201753916U CN201020297924XU CN201020297924U CN201753916U CN 201753916 U CN201753916 U CN 201753916U CN 201020297924X U CN201020297924X U CN 201020297924XU CN 201020297924 U CN201020297924 U CN 201020297924U CN 201753916 U CN201753916 U CN 201753916U
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Abstract
The utility model discloses a tail low-resistance heat exchanger for a pressure-fired fuel oil and gas boiler, characterized in that, flue gas discharged from the tail of the pressure-fired fuel oil and gas boiler can enter into an inlet flue box by a straight flue canal, a heat exchange element of the heat exchanger between the inlet flue box and an outlet flue box can be arranged into a threaded pipe, a deoxidization tower is arranged at the top of the heat exchanger, a water inlet spraying pipe is connected into the deoxidization tower, a steam overflow port is arranged at the top of the deoxidization tower. The utility model can greatly improve the thermal efficiency of the pressure-fired boiler, reduce the product manufacturing cost, and ensure the operation to be stable and reliable.
Description
Technical field
The utility model relates to the pressure-fired oil-burning gas-fired boiler, a kind of pressure-fired oil-burning gas-fired boiler low-resistance energy-saving appliance of more specifically saying so.
Background technology
The pressure-fired oil-burning gas-fired boiler is nearest 30 years a kind of novel fuel gas fired-boiler technology that take place and grow up.Use is all very convenient because it is made, and especially environmental protection characteristic is that other any boilers are incomparable, therefore is widely used among all trades and professions.But because this kind boiler can't be provided with the afterbody heating device, its thermal efficiency is not high.Under the requirement of low-carbon economy, boiler also must guarantee the minimum thermal efficiency, and for reaching requirement, more existing ways are as follows:
Basic way has following several:
1, adopt common afterbody heat exchanger, promptly " economizer " as the back-end surfaces device of pressurized boiler, but its resistance is excessive, can't satisfy the specific combustion characteristics of pressurized boiler continuously.
2, adopt the chimney flue type heat exchanger, though the less flue gas flow characteristic that can satisfy pressurized boiler of its resistance, its heat exchange efficiency is that the coefficient of heat transfer does not reach designing requirement, therefore uses only for controlling partially.
The utility model content
The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of pressure-fired oil-burning gas-fired boiler afterbody low-resistance heat-exchanger rig is provided, so that the pressurized boiler thermal efficiency can be greatly improved, and reduce cost of goods manufactured, guarantee stable and reliable operation.
The utility model technical solution problem adopts following technical scheme:
The utility model pressure-fired oil-burning gas-fired boiler with the design feature of afterbody low-resistance heat-exchanger rig is:
The flue gas of discharging at pressure-fired oil-burning gas-fired boiler afterbody inserts the import smoke box by straight flue, heat exchange element in the heat exchanger between import smoke box and outlet smoke box is set to screwed pipe, the top of heat exchanger is provided with oxygen-removing tower, have access to into water shower in the oxygen-removing tower, the below of water inlet shower is provided with the water distribution dish, and the top of oxygen-removing tower is provided with the steam escape orifice;
The utility model pressure-fired oil-burning gas-fired boiler also is with the design feature of afterbody low-resistance heat-exchanger rig:
Described screwed pipe is equilateral triangle and distributes in heat exchanger, the centre-to-centre spacing of adjacent thread pipe is the direct 1.25-1.5 of screwed pipe times.
In described heat exchanger, be provided with the condensation waste heat carbonated drink access tube that comes from hot system, condensation waste heat carbonated drink access tube directly with the exchanger head welding, and the entry position that extend into oxygen-removing tower is located.
Automatic water inflow control system is set, and the water inlet pipe of automatic water inflow control system is connected with the water inlet shower in being arranged on oxygen-removing tower, and the condensate tank of dehumidifier of described automatic water inflow control system is arranged in the heat exchanger.
Compared with the prior art, the utility model beneficial effect is embodied in:
1, the interior heat exchange device of heat exchanger is set to screwed pipe in the utility model, makes it can effectively transmit heat in 200 ℃～250 ℃ flue gases, and the thermal efficiency of whole cooker furnace system can reach more than 91%.
2, the utility model adopts automatic water inflow control system, has avoided unsafe factor, can satisfy the service condition of boiler under long-term continuous state.
3, the utility model is realized deoxidation by the water inlet shower is set, and makes it satisfy the boiler replenishing water requirements in water quality.
4, the screwed pipe in the utility model is to distribute stringing quantity by exhaust gas volumn, makes flue gas evenly and with rational flow velocity pass through heat exchange element, reduces along the journey flue gas resistance, guarantees the continuous operation of boiler pressure-fired.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 a is a screwed pipe profile schematic diagram in the utility model.
Fig. 2 b is a screwed pipe vertical profile structural representation in the utility model.
Fig. 3 is the schematic diagram of arranging of screwed pipe in the utility model in heat exchanger.
Number in the figure: 1 import smoke box, 2 heat exchangers, 3 outlet smoke boxes, 4 heat exchangers, 5 oxygen-removing towers, 5a steam escape orifice, 6 water distribution dishes, 7 automatic inlet control devices, 7a water inlet shower, 8 used heat carbonated drink access tubes.
The specific embodiment
Referring to Fig. 1, Fig. 2, in the present embodiment, the flue gas of discharging at pressure-fired oil-burning gas-fired boiler afterbody inserts import smoke box 1 by straight flue, heat exchange element in the heat exchanger 4 between import smoke box 1 and outlet smoke box 3 is set to screwed pipe 2, the top of heat exchanger 4 is provided with oxygen-removing tower 5, have access to into water shower 7a in the oxygen-removing tower 5, the below of water inlet shower 7a is provided with water distribution dish 6, and the top of oxygen-removing tower 5 is provided with steam escape orifice 5a;
The water inlet pipe of automatic water inflow control system 7 is connected with the water inlet shower 7a in being arranged on oxygen-removing tower 5, and the water level detecting of water inflow control system 7 is arranged in the heat exchanger 4 automatically;
In heat exchanger 4, be provided with the condensation waste heat carbonated drink access tube 8 that comes from hot system, condensation waste heat carbonated drink access tube 8 directly with the welding of heat exchanger 4 end sockets, and extend into the place, entry position of oxygen-removing tower 5, to originate as steam required in the oxygen-removing tower 5.
As Fig. 2 a and Fig. 2 b and shown in Figure 3, screwed pipe 2 can adopt the small-bore deep trouth round thread pipe of three rollers to being rolled into, and each root screwed pipe 2 is equilateral triangle and distributes in heat exchanger 4, and the spacing of adjacent thread pipe should be the direct 1.25-1.5 of screwed pipe times.
Adopt the straight line flue to connect,, be used the slow curved elbow that angle is not more than 60 degree, can make drag overall less than 80Pa in the hope of reducing flue gas resistance to greatest extent.
Flue gas from the discharge of pressure-fired oil-burning gas-fired boiler afterbody, enter in the import smoke box 1 in the utility model by without hindrance straight flue, carrying out flue gas in import smoke box 1 distributes, shallow bid flue gas after the distribution enters respectively in each screwed pipe,, after flowing into screwed pipe, move ahead with the flue gas of linear state motion according to the helical path of screwed pipe.The haul distance of spiral is than long about four times of corresponding length of straight pipe, and therefore, the setting of screwed pipe extends flue gas time of staying in heat exchanger greatly in the present embodiment, improves the heat exchange effect with this; The reasonable bore of the depth of thread in the choose reasonable screwed pipe and thread pitch and screwed pipe can obtain the best coefficient of heat transfer.Also can select suitable flue gas flow rate, reach the effect that reduces flue gas resistance by the sectional area that changes circulation.
For flue gas resistance is reduced, screwed pipe should be selected smooth seamless steel pipe, the flue gas of discharging from the outlet smoke box enters chimney by the low-resistance flue again, because the exhanst gas outlet temperature is lower, about 160 ℃, the locomitivity of flue gas descends, thus require the resistance of flue to want little smooth, thus satisfy the low-resistance restriction of whole system.
Heat transferring medium in the heat exchanger is the demineralized water that is provided by softened water tank, and water inflow control system 7 is used for controlling the liquid level of heat exchanger 4 automatically, thus the continuous operation of the equipment of assurance; Water inlet is at first carried out thermal de-aeration and is accelerated into gaseous state by water distribution dish in oxygen-removing tower 56 and the steam that rises overflowing, and the steam escape orifice 5a at oxygen-removing tower top directly is communicated with atmosphere.Water inlet is through oxygen-removing tower the time, and the oxygen atom in the water is heated and overflows, and deaerated water enters boiler and can protect boiler and equipment not by oxygen corrosion.Hot water in the heat exchanger improves boiler feed temperature by boiler feed pump pressurization supply boiler feed water with this, thereby has improved the making full use of of heat of boiler, has reached the purpose of energy-saving and emission-reduction, and has satisfied the minimum thermal efficiency requirement of oil-burning gas-fired boiler.
Claims (4)
1. a pressure-fired oil-burning gas-fired boiler is with afterbody low-resistance heat-exchanger rig, it is characterized in that: the flue gas of discharging at pressure-fired oil-burning gas-fired boiler afterbody inserts import smoke box (1) by straight flue, the heat exchange element that is arranged in the heat exchanger (4) between import smoke box (1) and the outlet smoke box (3) is set to screwed pipe (2), the top of heat exchanger (4) is provided with oxygen-removing tower (5), have access to into water shower (7a) in the oxygen-removing tower (5), the below of water inlet shower (7a) is provided with water distribution dish (6), and the top of oxygen-removing tower (5) is provided with steam escape orifice (5a).
2. pressure-fired oil-burning gas-fired boiler according to claim 1 is characterized in that with afterbody low-resistance heat-exchanger rig described screwed pipe (2) is equilateral triangle and distributes in heat exchanger (4), and the spacing of adjacent thread pipe is the direct 1.25-1.5 of screwed pipe times.
3. pressure-fired oil-burning gas-fired boiler according to claim 1 afterbody low-resistance heat-exchanger rig, it is characterized in that in described heat exchanger (4), being provided with the condensation waste heat carbonated drink access tube (8) that comes from hot system, described condensation waste heat carbonated drink access tube (8) directly with the welding of heat exchanger (4) end socket, and the entry position that extend into oxygen-removing tower (5) is located.
4. pressure-fired oil-burning gas-fired boiler according to claim 1 afterbody low-resistance heat-exchanger rig, it is characterized in that being provided with automatic water inflow control system (7), the water inlet pipe of described automatic water inflow control system (7) is connected with water inlet shower (7a) in being arranged on oxygen-removing tower (5), and the condensate tank of dehumidifier of described automatic water inflow control system (7) is arranged in the heat exchanger (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020297924XU CN201753916U (en) | 2010-08-12 | 2010-08-12 | Tail low-resistance heat exchanger for pressure-fired fuel oil and gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020297924XU CN201753916U (en) | 2010-08-12 | 2010-08-12 | Tail low-resistance heat exchanger for pressure-fired fuel oil and gas boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201753916U true CN201753916U (en) | 2011-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020297924XU Expired - Lifetime CN201753916U (en) | 2010-08-12 | 2010-08-12 | Tail low-resistance heat exchanger for pressure-fired fuel oil and gas boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201753916U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936523A (en) * | 2010-08-12 | 2011-01-05 | 安徽博瑞特热能设备有限公司 | Tail low-resistance heat exchange device for micro-positive pressure oil and gas fired boiler |
-
2010
- 2010-08-12 CN CN201020297924XU patent/CN201753916U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936523A (en) * | 2010-08-12 | 2011-01-05 | 安徽博瑞特热能设备有限公司 | Tail low-resistance heat exchange device for micro-positive pressure oil and gas fired boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110302 |
|
| CX01 | Expiry of patent term |