CN207716941U - A kind of gas fired-boiler graphite condenser - Google Patents
A kind of gas fired-boiler graphite condenser Download PDFInfo
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- CN207716941U CN207716941U CN201721894867.1U CN201721894867U CN207716941U CN 207716941 U CN207716941 U CN 207716941U CN 201721894867 U CN201721894867 U CN 201721894867U CN 207716941 U CN207716941 U CN 207716941U
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Abstract
The utility model provides a kind of gas fired-boiler graphite condenser, it is installed on the flue before gas fired-boiler chimney, it is positioned at the graphite condensing unit above support device including support device and support, graphite condensing unit includes at least one graphite condensing unit, graphite condensing unit includes that rectangular graphite condenses block, upper cover plate, lower plate, upper sealing plate, lower sealing plate, left plate, right plate, front side board, back side panel, preceding sealing plate and rear sealing plate, graphite condenses the circulating water flow through-hole that block is equipped with the flue gas recirculation hole and front and back perforation of multiple row up and down, and flue gas recirculation hole does not pass through mutually with circulating water flow through-hole；Upper cover plate is equipped with gas inlet, and lower plate is equipped with exhanst gas outlet, and front side board lower part is equipped with circulating water intake, and back side panel top is equipped with circulating water outlet.The utility model provides the graphite condenser that a kind of heat exchange efficiency is high, can recycle a large amount of fume afterheats and thoroughly solves the problems, such as low-temperature corrosion due to the characteristic of material.
Description
Technical field
The utility model is related to a kind of gas fired-boiler flue gas waste heat recovery apparatus, and in particular to a kind of gas fired-boiler stone
Black condenser.
Background technology
Boiler is a kind of special equipment of highly energy-consuming, and energy consumption total amount occupies the portion that the energy consumption in China is held the balance
Point, boiler energy-saving work its level of power consumption is reduced for China, the economic benefit of enterprise play it is very important
Meaning.The main component of natural gas is methane（CH4）, since it has an a large amount of protium, when burning, is combined with oxygen, will produce big
The water vapour of amount, combustion gas（Natural gas）Water vapour volume accounts for nearly 20% in boiler exhaust gas, and flue gas condensing is got off, and fully discharges water
Latent heat of the steam has great energy-saving significance.
In gas fired-boiler operational process, there are the excessively high phenomenons of exhaust gas temperature（150~180℃）, flue gas physical sensible heat and flue gas
The latent heat of vaporization of middle water vapour is discharged into air, causes prodigious energy waste.Gas fired-boiler generally uses metal material at present
Expect the waste-heat recovery device prepared, is mounted on boiler tail, for example use steel condenser Mist heat recovering, but steel condenses
There are following defects for device：（1）Because flue gas condensing water is weakly acidic, therefore there are etching problems for steel condenser, and there are dust stratification,
Stifled ash problem, service life are short；（2）Steel material thermal coefficient is relatively low, so that there are heat exchange efficiencies is inclined for steel condenser
Low problem.
To solve the problems, such as boiler tail flue gas low-temperature corrosion, fluoroplastics manufacture tubulation heat-exchanger rig may be used, be mounted on
Fume afterheat is absorbed and filtered in boiler back end ductwork, can periodically be rinsed with water heating surface, solves etching problem, but exists such as
Lower defect：（1）Fluoroplastics heat transfer coefficient is low, is 1/20 of carbon steel or so, therefore plant bulk and takes up a large area, manufacturing cost
It is higher；（2）Apparatus system is more complex, generally can not achieve the condensation of boiler smoke.
As long as gas fired-boiler flue gas touches the medium less than dew-point temperature, it will be condensed into water, release a large amount of heat
Amount, heat consist of two parts：1, physical sensible heat：It is realized by reducing smoke temperature, by test, often reduces smoke temperature 20 ~ 50
DEG C, boiler thermal efficiency 1 ~ 3% can be improved；2, the latent heat of vaporization：It is condensed into the phase transformation of water by water vapour to realize, the thermal energy of recycling
Than physical sensible heat bigger.For gas fired-boiler under normal Normalization rule, the thermal efficiency of itself has reached 80% or more, such as passes through again
Transformation boiler body will lose more than gain to improve the thermal efficiency, and meaning is not very big.By using flue gas condensing recovery system, not
To be a kind of minimum, income of input, it can be achieved that improving boiler thermal efficiency 10% or so under the premise of influencing the boiler thermal efficiency itself
Maximum power save mode.Based on the above reasons, the utility model provides that a kind of heat exchange efficiency is high, can recycle a large amount of fume afterheats
Graphite condenser low-temperature corrosion is thoroughly solved the problems, such as due to the characteristic of material.
Invention content
The technical problem to be solved by the present invention is to provide a kind of gas fired-boiler graphite condensers, can be by gas fired-boiler
Exhaust gas temperature is down to 45 DEG C hereinafter, heat exchange efficiency is high, can recycle a large amount of fume afterheats, thoroughly solve the problems, such as low-temperature corrosion.
In order to solve the above technical problems, the embodiments of the present invention provide a kind of gas fired-boiler graphite condenser, peace
Loaded on the flue before gas fired-boiler chimney, including support device and support are positioned at the condensation dress of the graphite above support device
It sets, wherein
The support device includes rectangular support plate and four support legs below the quadrangle of support plate；
The graphite condensing unit includes at least one graphite condensing unit, and the graphite condensing unit includes rectangular stone
Ink condensation block, upper cover plate, lower plate, upper sealing plate, lower sealing plate, left plate, right plate, front side board, back side panel, preceding sealing plate and rear envelope
Plate, the upper cover plate, lower plate, left plate, right plate, front side board, back side panel are interconnected to form a closed cavity, institute
State the circulating water flow through-hole that graphite condensation block is equipped with the flue gas recirculation hole and front and back perforation of multiple row up and down, and the flue gas
Recirculation hole does not pass through mutually with circulating water flow through-hole；The upper cover plate is equipped with gas inlet, and lower plate is equipped with exhanst gas outlet, described
Front side board lower part is equipped with circulating water intake, and the back side panel top is equipped with circulating water outlet；
The upper sealing plate and lower sealing plate are individually fixed in the upper and lower of graphite condensation block, and right on upper sealing plate and lower sealing plate
The position of flue gas recirculation hole is answered to be equipped with flue gas via；
The edge of the upper sealing plate and lower sealing plate is fixedly connected with front, rear, left and right side plate respectively, the lower plate, lower envelope
Plate, front side board, back side panel, left plate and right plate enclose be set as it is closed into flue gas chamber, the upper cover plate, upper sealing plate, front side board,
Back side panel, left plate and right plate enclose be set as it is closed go out flue gas chamber；
The preceding sealing plate and rear sealing plate are individually fixed in the forward and backward side of graphite condensation block, and the preceding sealing plate and rear sealing plate
The upper position corresponding to circulating water flow through-hole is equipped with recirculated water via；
The edge of the preceding sealing plate and rear sealing plate is fixedly connected with left plate, right plate, upper sealing plate and lower sealing plate respectively, institute
State front side board, preceding sealing plate, upper sealing plate, lower sealing plate, left plate and right plate enclose be set as it is closed into circulating water cavity, the rear side
Plate, rear sealing plate, upper sealing plate, lower sealing plate, left plate and right plate enclose be set as it is closed go out circulating water cavity.
Wherein, the graphite condensing unit includes graphite condensing unit that is multiple setting up and down and connecting, is located above
The exhanst gas outlet of graphite condensing unit is connected with the gas inlet of the graphite condensing unit of lower section by flue, is located above
The circulating water intake of graphite condensing unit be connected by circulating water pipeline with the circulating water outlet of the graphite condensing unit of lower section.
Further, it is equipped with a row circulating water flow through-hole between every two row flue gas recirculation hole.
Preferably, flue gas recirculation hole described in each column includes two rounds.
Wherein, in the front side board, preceding sealing plate, back side panel, rear sealing plate, left plate and the right plate contacted with recirculated water
Anti-corrosion resin layer is coated on side.
Wherein, the front side board is equipped with the observation panel with blind plate.
Wherein, the side of the gas fired-boiler graphite condenser is equipped with the bypass cigarette of connection gas inlet and exhanst gas outlet
Road.
The preparation method of above-mentioned gas fired-boiler graphite condenser includes the production method of graphite condensation block, and step is such as
Under：
（1）By the impermeability artificial graphite bulk machine that thermal coefficient is 116.3~183.7W/ (mK), granularity≤2mm
The graphite block of squarely is processed, surface inspection, processing are qualified；
（2）Perforative flue gas recirculation hole, pre-and post perforative recirculated water up and down are processed on graphite block using mechanical system
Recirculation hole；
（3）Dipping
（3-1）Impurity, the greasy dirt on graphite block surface are cleared up, and is dried；
（3-2）By step（2）Treated, and graphite block is placed in hanging box, is fitted into dipping kettle, then will be impregnated the kettle of kettle
Lid covers tightly；
（3-3）Dipping kettle is vacuumized, vacuum degree is not less than -0.09MPa, and the time is not less than 5 hours；Continuing to vacuumize
Under conditions of, the valve for opening dipping kettle sucks resin in dipping kettle, and graphite block should be submerged 10 ~ 15cm and is limited by amount of resin,
Close valve；
（3-4）Open the air valve of dipping kettle, be sent into compressed air, pressure not less than 0.9MPa, kept for 4 hours or more,
Resin is set fully to be full of the hole of graphite block；After pressurization, resin is pressed back into holding vessel by Open valve；Open exhaust
Pressure reduction is waited resins all to empty by valve, opens the kettle cover of dipping kettle, takes out graphite block airing；
（4）Solidification
（4-1）Graphite block that is dipping is good and drying is transferred in solidification kettle, is needed to separate between two pieces of graphite blocks, is prevented from curing
The kettle cover of solidification kettle is closed in posterior synechia；
（4-2）Compressor is opened, compressed air is sent into solidification kettle, air pressure keeps 0.8 ~ 1.0 MPa, cures kettle chuck
It is interior to be equipped with organic heat carrier, heat tracing circuit heating to be connected, heats and slowly carries out, heating is no more than 20 DEG C per hour, and heating terminates,
Keep 4 hours or more constant temperature；The curing process time is not lower than 10 hours, and solidification temperature is 180 ~ 200 DEG C；
（4-3）Constant temperature finishes, and stops heating, and the compressed air in emptying solidification kettle opens the kettle cover of solidification kettle, makes it certainly
It is so cooling, so far complete single-steeping and curing process process；
（5）Repeat step（3）And step（4）Repeatedly, until treated, graphite block rate of body weight gain is not less than 14%, completes graphite
Condense the preparation of block.
The preparation method of above-mentioned gas fired-boiler graphite condenser further includes following steps：
（6）By figure processing upper cover plate, lower plate, upper sealing plate, lower sealing plate, left plate, right plate, front side board, back side panel, preceding
Sealing plate and rear sealing plate, and coat anti-corrosion on the medial surface of front side board, preceding sealing plate, back side panel, rear sealing plate, left plate and right plate
Resin layer；
（7）Graphite is condensed into block, upper cover plate, lower plate, upper sealing plate, lower sealing plate, left plate, right plate, front side board, rear side
Plate, preceding sealing plate and rear sealing plate are assembled, and the lower plate, lower sealing plate, front side board, back side panel, left plate and right plate are enclosed and set
At closed into flue gas chamber, the upper cover plate, upper sealing plate, front side board, back side panel, left plate and right plate enclose be set as it is closed go out
Flue gas chamber, the front side board, preceding sealing plate, upper sealing plate, lower sealing plate, left plate and right plate enclose be set as it is closed into circulating water cavity,
The back side panel, rear sealing plate, upper sealing plate, lower sealing plate, left plate and right plate enclose be set as it is closed go out circulating water cavity, complete one
The preparation of graphite condensing unit；
（8）By multiple graphite condensing units it is setting up and down and using flue by the flue gas of the graphite condensing unit of top
Outlet is connected to the gas inlet of the graphite condensing unit of lower section, the graphite condensing unit that will be located above using circulating water pipeline
Circulating water intake be connected to the circulating water outlet of the graphite condensing unit of lower section, realize graphite condensing unit modularization peace
Dress completes the preparation of graphite condensing unit；
（9）By step（8）The graphite condensing unit support of preparation is positioned in support device, and cold in the graphite of bottom
Flange-interface is set at the gas inlet of the exhanst gas outlet of solidifying unit and the graphite condensing unit of the top, in gas inlet and cigarette
Gas is connected to by-pass flue between outlet, is condensed in the circulating water intake of the graphite condensing unit of bottom and the graphite of the top single
Connection bypass water channel between the circulating water outlet of member；
（10）It is piped accordingly at gas inlet, exhanst gas outlet, circulating water intake, circulating water outlet, completes combustion
The preparation of gas boiler graphite condenser.
Wherein, it should be noted that in the preparation process of the gas fired-boiler graphite condenser：
（Ⅰ）Graphite condenses block and the storage space of graphite condenser must be smooth hard, is at least laid with two pieces of chocks and is supported on
It is steady to place at two on the shell of graphite condenser, allow equipment to bottom out；
（Ⅱ）Graphite material system fragile material, carry, lifting when should drink spike and put down gently, the drawing that must not contact to earth is dragged and to agitate graphite cold
Grumeleuse；When lifting, lifting rope should pass through or bundle steel shell by lifting lug hole, cover board and shell must not be utilized to take over lifting；
It is to ensure safety in lifting, it is proposed that continued upward and hung with two cranes, until reaching vertical, each component of device must not touch
Ground；
（Ⅲ）Graphite condenser cannot be taken as support of pipelines, should be close at graphite condenser when as heavier such as extension tube attached
Separately vertical support of pipelines, the pipeline at especially top are less answered overweight, and ensure there is the move place to expand with heat and contract with cold；
（Ⅳ）The support device of graphite condenser is only used for graphite condensing unit, and four supporting legs must highly concordant and stress
Uniformly；Support device must have prevent settle and shake and shock proof ability；
（Ⅴ）The nut of all connection bolts must use the symmetrical method for connecting and screwing simultaneously on graphite condenser, by
Step tightens, and forbids first to screw certain point or the wrong-doing of certain one side；
（Ⅵ）Forbid external force collision or beats graphite condenser.
（Ⅶ）It must not freeze on the shell of graphite condenser in order to avoid damaging the graphite condensation block in it, if you need to freeze, shell
It should be full of recirculated cooling water in vivo, cause shell excessive deformation in order to avoid freezing, lead to not dismantle；
（Ⅷ）When flange-interface external connection must not solar obligation, symmetrical uniform operation is answered when tightening screw；
（Ⅸ）The equipment for having vibrations being connected with graphite condenser should set buffer unit（Such as telescopic joint, compensator
Deng）；
（Ⅹ）It should be noted that cannot have bulk foreign matter when installing graphite condenser（Such as gasket, plastics, fabric etc.）It is retained in stone
In the inlet pipeline of black condenser, otherwise can block heat exchanging holes causes fume side actual internal area to reduce, and smoke is difficult.
The above-mentioned technical proposal of the utility model has the beneficial effect that：The utility model is made using impermeable graphite material
Thermal coefficient for the heat exchange element of condenser, graphite is 116.3~183.7W/ (mK), is 2.5 times of carbon steel, stainless
7 times of steel, raw material are that granularity≤2mm artificial graphite bulks are taken over metal cover board, the parts such as flue adapter composition,
Circulate high-temperature flue gas in longitudinal flue gas recirculation hole, circulation cycle water or boiler feedwater in lateral circulating water flow through-hole, flue gas
Recirculation hole uses double pore structure, had not only reduced fume side flow resistance but also had increased fume side heat transfer area, two side liquids is made to change
More fully efficiently, heat exchange element has excellent structure design to heat, thoroughly solves the problems, such as low-temperature corrosion.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model embodiment one；
Fig. 2 is the enlarged drawing of the structural schematic diagram of graphite condensing unit in embodiment one；
Fig. 3 be Fig. 2 in along A-A sectional view；
Fig. 4 is the enlarged drawing for the vertical view that graphite condenses block in embodiment one；
Fig. 5 is the enlarged drawing for the front view that graphite condenses block in embodiment one；
Fig. 6 is flow chart when embodiment one uses.
Reference sign：
1, support device；10, support plate；11, support leg；2, graphite condensing unit；20, graphite condensing unit；200, stone
Ink condensation block；201, upper cover plate；202, lower plate；203, upper sealing plate；204, lower sealing plate；205, left plate；206, right plate；
207, front side board；208, back side panel；209, preceding sealing plate；210, rear sealing plate；211, flue gas recirculation hole；212, circulating water flow through-hole；
213, gas inlet；214, exhanst gas outlet；215, circulating water intake；216, circulating water outlet；217, observation panel；3, into flue gas
Chamber；4, go out flue gas chamber；5, into circulating water cavity；6, go out circulating water cavity；7, gas fired-boiler；8, boiler；9, cistern.
Specific implementation mode
In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawing
And specific embodiment is described in detail.
As shown in Figure 1, a kind of gas fired-boiler graphite condenser, is installed on the flue before gas fired-boiler chimney, including
Support device 1 and support are positioned at the graphite condensing unit 2 of 1 top of support device, wherein
The support device 1 includes rectangular support plate 10 and four support legs below the quadrangle of support plate 10
11。
The graphite condensing unit 2 includes at least one graphite condensing unit 20 as shown in Figures 2 and 3, the graphite
Condensing unit 20 includes that rectangular graphite condenses block 200, upper cover plate 201, lower plate 202, upper sealing plate 203, lower sealing plate 204, a left side
Side plate 205, right plate 206, front side board 207, back side panel 208, preceding sealing plate 209 and rear sealing plate 210, each plate are carbon steel material, this
The only for ease of illustration structure all around at place, can also be arranged left sealing plate and right sealing plate, then the graphite condensation being described below
Circulating water flow through-hole on block is exactly that left and right is run through.It is the upper cover plate 201, lower plate 202, left plate 205, right plate 206, preceding
Side plate 207, back side panel 208 are interconnected to form a closed cavity.
As shown in Figure 4, Figure 5, the graphite condensation block 200 is equipped with the flue gas recirculation hole 211 of multiple row up and down with before
The circulating water flow through-hole 212 penetrated through afterwards, and the flue gas recirculation hole 211 does not pass through mutually with circulating water flow through-hole 212.The present embodiment
In, it is equipped with a row circulating water flow through-hole 212 between every two row flue gas recirculation hole 211.Flue gas recirculation hole 211 described in each column wraps
Two rounds are included.
The upper cover plate 201 is equipped with gas inlet 213, and lower plate 202 is equipped with exhanst gas outlet 214, in the present embodiment,
Flange-interface is connected separately at the gas inlet 213 and exhanst gas outlet 214, the lower plate 202 is fixedly connected on support
The top of plate 10, the flange-interface being connect with exhanst gas outlet 214 are located at the lower section of support plate 10.
207 lower part of the front side board is equipped with circulating water intake 215, and 208 top of the back side panel is equipped with circulating water outlet
216.The front side board 207 is equipped with the observation panel 217 with blind plate.
The upper sealing plate 203 and lower sealing plate 204 are individually fixed in the upper and lower of graphite condensation block 200, and upper sealing plate 203
Flue gas via is equipped with the position for corresponding to flue gas recirculation hole 211 on lower sealing plate 204, flue gas via can be by being fixed therein
Short tube is fixedly connected with flue gas recirculation hole.
The edge of the upper sealing plate 203 and lower sealing plate 204 is fixedly connected with front, rear, left and right side plate respectively, the bottom
Plate 202, lower sealing plate 204, front side board 207, back side panel 208, left plate 205 and right plate 206 enclose be set as it is closed into flue gas chamber
3, the upper cover plate 201, upper sealing plate 203, front side board 207, back side panel 208, left plate 205 and right plate 206, which enclose, to be set as closing
Go out flue gas chamber 4.
The preceding sealing plate 209 and rear sealing plate 210 are individually fixed in the forward and backward side of graphite condensation block 200, and the preceding sealing plate
209 and rear sealing plate 210 on correspond to the position of circulating water flow through-hole 212 and be equipped with recirculated water via, recirculated water via can pass through
The short tube being fixed therein is fixedly connected with recirculated water via.
The edge of the preceding sealing plate 209 and rear sealing plate 210 respectively with left plate 205, right plate 206, upper sealing plate 203 and under
Sealing plate 204 is fixedly connected, the front side board 207, preceding sealing plate 209, upper sealing plate 203, lower sealing plate 204, left plate 205 and right plate
206 enclose be set as it is closed into circulating water cavity 5, the back side panel 208, rear sealing plate 210, upper sealing plate 203, lower sealing plate 204, left plate
205 and right plate 206 enclose be set as it is closed go out circulating water cavity 6.
To avoid corroding, the front side board 207 that is contacted with recirculated water, preceding sealing plate 209, back side panel 208, rear sealing plate 210,
Anti-corrosion resin layer is coated on the medial surface of left plate 205 and right plate 206.
To improve condensation effect, the graphite condensing unit 2 includes graphite condensing unit that is multiple setting up and down and connecting
20, the gas inlet of the exhanst gas outlet for the graphite condensing unit being located above and the graphite condensing unit of lower section passes through flue
It is connected, the circulating water outlet of the circulating water intake for the graphite condensing unit being located above and the graphite condensing unit of lower section is by following
Ring waterpipe is connected.
By above structure, gas fired-boiler graphite condenser can realize that modularization is installed, and all parts are all made of product
The wooden formula stacks, and is fitted together by bolt.On flue before gas fired-boiler chimney, gas inlet and flue gas go out installation site
For mouth at the both ends of graphite condenser, flue gas flow direction is one way.Flue and chimney after condenser should do preservative treatment（As anti-corrosion applies
Material）.The side of gas fired-boiler graphite condenser is equipped with the by-pass flue of connection gas inlet and exhanst gas outlet, in not blowing out
In the case of condenser can be carried out check and service work.
The operation principle of the utility model is：Boiler smoke outlet connection graphite condenser upper cover plate on flue gas into
Mouthful, after graphite condensation block transfers heat to the boiler feedwater in circulating water flow through-hole, by the exhanst gas outlet on lower plate
It is discharged into chimney.After boiler feedwater is heated, it can be directly entered boiler, it can also be in the circulating water intake of graphite condenser
Circulating water line is established between circulating water outlet and the boiler of boiler feedwater, and recirculated water is set on circulating water pipe road
The using and the reserved are generally arranged in pump, water circulating pump.
When the utility model is transformed for existing gas fired-boiler residual neat recovering system, flow chart such as Fig. 6 of waste heat recovery
It is shown.
Involved equipment mainly has gas fired-boiler 7, the boiler 8 of hot water is sent to gas fired-boiler, adds water to boiler
Cistern 9 and between boiler formed circulating water line graphite condenser, the circulating water intake of graphite condenser and
Circulating water line is established between circulating water outlet and the boiler of boiler feedwater, and water circulating pump is set on circulating water pipe road,
The using and the reserved are generally arranged in water circulating pump.The gas inlet of graphite condenser is connected with the outlet flue of gas fired-boiler by pipeline,
The exhanst gas outlet of graphite condenser and the outlet flue of gas fired-boiler are connected with chimney by pipeline, and butterfly is equipped on each pipeline
Valve.
The water outlet of cistern can be connected with the cold water inlet of boiler, can also be with the recirculated water of graphite condenser
Import is connected, and the hot water outlet of boiler is connected with the water inlet of gas fired-boiler by water pipe and boiler feed pump, and boiler is given
Water pump is also the using and the reserved.
The characteristics of above-mentioned waste heat recovery flow：Two solenoid valves are set, are carried out by hot water upper box part fluid level controller
Control ensures that the uninterrupted water cycle of graphite condenser and the reliable water supply of boiler, control process are as follows：
1. when hotwell level is prescribed a time limit higher than low water level, hot water lower box part solenoid valve（Y-01）It opens, cistern lower part electricity
Magnet valve（Y-02）It is closed, boiler carries out water cycle with graphite condenser by water circulating pump；
2. with gas fired-boiler water supply, water level continuously decreases in boiler, when water level is prescribed a time limit down to low water level in boiler,
Hot water lower box part solenoid valve（Y-01）It is closed, cistern lower part solenoid valve（Y-02）It opens, cold water enters through water pump in cistern
Enter boiler after graphite condenser is heated, the cold water in cistern can also be directly entered in boiler；
3. in cistern, water constantly flows into boiler（Circulating water flow is more than boiler feedwater）, when hotwell level height
It prescribes a time limit in high water level, hot water lower box part solenoid valve（Y-01）It opens, cistern lower part solenoid valve（Y-02）It is closed, boiler and stone
Black condenser carries out water cycle by water circulating pump.
Demand for safety protection：
A, hotwell level is prescribed a time limit less than extremely low water level, and the burner of gas fired-boiler is out of service；As boiler is stopping
Operating status, then burner misfire.
B, two water circulating pumps are out of service（Or malfunction）When, the burner of gas fired-boiler is out of service；Such as pot
Stove is in run-stopping status, then burner misfires.
The pressure testing points for attention of the utility model：
1）, equipment carry out suppressing pressure testing according to design requirement and related specification before manufacture, through going out after the assay was approved
The tool certificate of merchandise just dispatches from the factory.But equipment in transport, storage, hoisting process it is possible to be damaged, therefore it is in place after,
It still needs to check whether gasket and airtight and watertight padding sealing performance are good, and whether bolt loosens, and according to every before driving or after repair
Pressure testing as defined in the nameplate or the certificate of merchandise of equipment requires to carry out hydraulic pressure pressure testing inspection.
2）, pressure testing when elder generation pressure testing tube side pressure, the i.e. pressure of flue gas recirculation hole；Then try shell side pressure, i.e. circulating water flow
The pressure of through-hole.
3）, two pieces of identical pressure gauges should be installed on the shell nozzle of graphite condensing unit before pressure testing, pressure gauge is necessary
It is by verification and the qualified term of validity, precision is not less than 1.5 grades, and range ability is 1.5-3 times of highest test pressure, most
It is 2 times well, two pieces of pressure gauges should be in the same position.
4）, pressure testing when graphite condensing unit shell domestic demand be full of non-corrosive Normal Atmospheric Temperature Liquid（Usually clean water）,
Empty internal gas.
5）, test medium temperature and graphite condense the block temperature difference no more than 20 DEG C, when graphite condenser wall temperature and liquid temperature
Pressure is slowly first raised to test pressure when spending close, is kept for half an hour.Then pressure is slowly decreased to design pressure again, protected
Pressure enough time is checked.Pressure should remain unchanged during inspection, not allow to maintain pressure test pressure not using continuous pressure
Become.
6）, pressure testing when pressure rise speed：It is general that 0.1Map is increased per 2-3min, pressure testing Jie should be emptied after pressure testing
Matter.
It is paid particular attention to when pressure testing：Superpressure hypervelocity is forbidden to carry out pressure testing；Forbid to use steam or other other steams（Gas
Body）Carry out pressure testing；Steam or other cold and hot media are passed through in the case of forbidding in tube side without any material into shell side；It is no
Can then fatal damage, or even whole equipment of damage be caused to graphite condensation block, sealing ring.
Points for attention when the utility model is used：
The utility model is mainly used for combustion gas（Oil）The flue gas waste heat recovery of boiler is wanted according to the characteristic and technique of flue gas
Design and manufacture are asked, are only used for being suitble to the working condition of its characteristic.Test run and operation operation must follow these steps：
1）It should be passed through boiler feedwater before test run and driving.
Pay attention to：Operation temperature must not exceed defined temperature in use on nameplate, otherwise accept the consequences by oneself；Forbid first to be passed through cigarette
Gas, after be passed through boiler feedwater, prevent high-temperature flue gas dry combustion method in equipment, cause equipment damage.
2）Full of after water in the shell, it is slowly introducing flue gas, observes the variation of liquid level in water tank, in water temperature uphill process,
Pay attention to checking at equipment sealing and to whether there is leakage at extension tube attached, and takes rational measure timely processing.It copes with simultaneously each
It is tight that the bolt of a sealing carries out heat.Need symmetrically to carry out when tight bolt, must not be tight it is excessively dead.
3）The severe impact of material and heat medium to equipment should be avoided, is gradually transferred to when being opened and closed valve maximum or most
Small flow.
4）Over-temp and over-pressure is forbidden to use.
5）Boiler need to fill the magnetic double level gauge of exportable model, and carry Liquid level low alarm.When liquid level report
When police shows that liquid level is too low, switch flue gas pipeline and boiler feedwater pipeline to bypassing, whether check device leak occurs.
6）When parking, it first should slowly stop being passed through flue gas, stop boiler feedwater again after system temperature is down to room temperature.
7）Such as the relatively low possible freezing equipment of temperature, then water in shell should be drained when stopping transport（It opens and empties pipe）In lower tube box
Condensate liquid.
8）It when heat-transfer capability reduces, must stop transport, with water wash cycles, chemical method cleaning agent appropriate can also be selected to clean
Graphite condenses the layer of scale of block；If effect is not shown, block-by-block cleaning can be removed.
9）It excessively reduces and whole flushing effect is not notable and when finding that leakage is serious, equipment need to be torn open in heat-transfer capability
Inspection must use hot water injection before opening and inspecting, remove remaining Korrosionsmedium, open and inspect to carry out under plumbness.
The utility model also provides a kind of preparation method of gas fired-boiler graphite condenser, includes the system of graphite condensation block
Make method, steps are as follows：
（1）By the impermeability artificial graphite bulk machine that thermal coefficient is 116.3~183.7W/ (mK), granularity≤2mm
The graphite block of squarely is processed, surface inspection, processing are qualified；
（2）By Fig. 2 and Fig. 3, processed on graphite block using mechanical system up and down perforative flue gas recirculation hole, front and back pass through
The circulating water flow through-hole worn.
（3）Dipping
（3-1）Impurity, the greasy dirt on graphite block surface are cleared up, and is dried；
（3-2）By step（2）Treated, and graphite block is placed in hanging box, is fitted into dipping kettle, then will be impregnated the kettle of kettle
Lid covers tightly；
（3-3）Dipping kettle is vacuumized, vacuum degree is not less than -0.09MPa, and the time is not less than 5 hours；Continuing to vacuumize
Under conditions of, the valve for opening dipping kettle sucks resin in dipping kettle, and graphite block should be submerged 10 ~ 15cm and is limited by amount of resin,
Close valve；
（3-4）Open the air valve of dipping kettle, be sent into compressed air, pressure not less than 0.9MPa, kept for 4 hours or more,
Resin is set fully to be full of the hole of graphite block；After pressurization, resin is pressed back into holding vessel by Open valve；Open exhaust
Pressure reduction is waited resins all to empty by valve, opens the kettle cover of dipping kettle, takes out graphite block airing.
（4）Solidification
（4-1）Graphite block that is dipping is good and drying is transferred in solidification kettle, is needed to separate between two pieces of graphite blocks, is prevented from curing
The kettle cover of solidification kettle is closed in posterior synechia；
（4-2）Compressor is opened, compressed air is sent into solidification kettle, air pressure keeps 0.9MPa, cures and is set in kettle chuck
There is organic heat carrier, connect heat tracing circuit heating, heat and slowly carry out, heating is no more than 20 DEG C per hour, and heating terminates, and keeps
4 hours or more constant temperature；The curing process time is not lower than 10 hours, and solidification temperature is 180 ~ 200 DEG C；
（4-3）Constant temperature finishes, and stops heating, and the compressed air in emptying solidification kettle opens the kettle cover of solidification kettle, makes it certainly
It is so cooling, so far complete single-steeping and curing process process.
（5）Repeat step（3）And step（4）2 ~ 4 times（It is typically repeated 2 times）, until treated, graphite block rate of body weight gain is not small
In 14%, the preparation of graphite condensation block is completed.
Graphite condensation block prepare after the completion of the step of be：
（6）Select carbon steel sheet by design drawing processing upper cover plate, lower plate, upper sealing plate, lower sealing plate, left plate, right plate, preceding
Side plate, back side panel, preceding sealing plate and rear sealing plate, and in front side board, preceding sealing plate, back side panel, rear sealing plate, left plate and right plate
Anti-corrosion resin layer is coated on side；
（7）Graphite is condensed into block, upper cover plate, lower plate, upper sealing plate, lower sealing plate, left plate, right plate, front side board, rear side
Plate, preceding sealing plate and rear sealing plate are assembled（Assembling sequence does not limit）, the lower plate, lower sealing plate, front side board, back side panel, a left side
Side plate and right plate enclose be set as it is closed into flue gas chamber, the upper cover plate, upper sealing plate, front side board, back side panel, left plate and right side
Plate enclose be set as it is closed go out flue gas chamber, the front side board, preceding sealing plate, upper sealing plate, lower sealing plate, left plate and right plate, which enclose, to be set as sealing
Close into circulating water cavity, the back side panel, rear sealing plate, upper sealing plate, lower sealing plate, left plate and right plate, which enclose, to be set as closed going out to follow
Ring water cavity completes the preparation of a graphite condensing unit；
（8）By multiple graphite condensing units it is setting up and down and using flue by the flue gas of the graphite condensing unit of top
Outlet is connected to the gas inlet of the graphite condensing unit of lower section, the graphite condensing unit that will be located above using circulating water pipeline
Circulating water intake be connected to the circulating water outlet of the graphite condensing unit of lower section, realize graphite condensing unit modularization peace
Dress completes the preparation of graphite condensing unit；
（9）By step（8）The graphite condensing unit support of preparation is positioned in support device, and cold in the graphite of bottom
Flange-interface is set at the gas inlet of the exhanst gas outlet of solidifying unit and the graphite condensing unit of the top, in gas inlet and cigarette
Gas is connected to by-pass flue between outlet, is condensed in the circulating water intake of the graphite condensing unit of bottom and the graphite of the top single
Connection bypass water channel between the circulating water outlet of member；
（10）It is piped accordingly at gas inlet, exhanst gas outlet, circulating water intake, circulating water outlet, completes combustion
The preparation of gas boiler graphite condenser.
Impregnated graphite block is a kind of good fragile material of corrosion resistance, during manufacture, transport, installation, use
Have to avoid shock, eccentric compression, rapid heat cycle, impact of water hammer etc., points for attention include：
（Ⅰ）Graphite condenses block and the storage space of graphite condenser must be smooth hard, is at least laid with two pieces of chocks and is supported on
It is steady to place at two on the shell of graphite condenser, allow equipment to bottom out；
（Ⅱ）Graphite material system fragile material, carry, lifting when should drink spike and put down gently, the drawing that must not contact to earth is dragged and to agitate graphite cold
Grumeleuse；When lifting, lifting rope should pass through or bundle steel shell by lifting lug hole, cover board and shell must not be utilized to take over lifting；
It is to ensure safety in lifting, it is proposed that continued upward and hung with two cranes, until reaching vertical, each component of device must not touch
Ground；
（Ⅲ）Graphite condenser cannot be taken as support of pipelines, should be close at graphite condenser when as heavier such as extension tube attached
Separately vertical support of pipelines, the pipeline at especially top are less answered overweight, and ensure there is the move place to expand with heat and contract with cold；
（Ⅳ）The support device of graphite condenser is only used for graphite condensing unit, and four supporting legs must highly concordant and stress
Uniformly；Support device must have prevent settle and shake and shock proof ability；
（Ⅴ）The nut of all connection bolts must use the symmetrical method for connecting and screwing simultaneously on graphite condenser, by
Step tightens, and forbids first to screw certain point or the wrong-doing of certain one side；
（Ⅵ）Forbid external force collision or beats graphite condenser；
（Ⅶ）It must not freeze on the shell of graphite condenser in order to avoid damaging the graphite condensation block in it, if you need to freeze, shell
It should be full of recirculated cooling water in vivo, cause shell excessive deformation in order to avoid freezing, lead to not dismantle；
（Ⅷ）When flange-interface external connection must not solar obligation, symmetrical uniform operation is answered when tightening screw；
（Ⅸ）The equipment for having vibrations being connected with graphite condenser should set buffer unit（Such as telescopic joint, compensator
Deng）；
（Ⅹ）It should be noted that cannot have bulk foreign matter when installing graphite condenser（Such as gasket, plastics, fabric etc.）It is retained in stone
In the inlet pipeline of black condenser, otherwise can block heat exchanging holes causes fume side actual internal area to reduce, and smoke is difficult.
The utility model uses heat exchange element of the impermeable graphite material as condenser, the thermal coefficient of graphite for for
116.3~183.7W/ (mK) is 2.5 times of carbon steel, and 7 times of stainless steel, raw material are granularity≤2mm artificial stone ink sticks
Material is taken over metal cover board, the parts such as flue adapter composition, and circulate high-temperature flue gas in longitudinal flue gas recirculation hole, lateral
Circulation cycle water or boiler feedwater in circulating water flow through-hole, flue gas recirculation hole use double pore structure, had both reduced flue gas effluent
Dynamic resistance and increase fume side heat transfer area, making both sides fluid heat transfer, more fully efficiently heat exchange element has excellent structure
Design, thoroughly solves the problems, such as low-temperature corrosion.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, under the premise of not departing from principle described in the utility model, it can also make several improvements and retouch, these improvement
The scope of protection of the utility model is also should be regarded as with retouching.
Claims (7)
1. a kind of gas fired-boiler graphite condenser is installed on the flue before gas fired-boiler chimney, which is characterized in that including branch
Support arrangement and support are positioned at the graphite condensing unit above support device, wherein
The support device includes rectangular support plate and four support legs below the quadrangle of support plate；
The graphite condensing unit includes at least one graphite condensing unit, and the graphite condensing unit includes that rectangular graphite is cold
Grumeleuse, upper cover plate, lower plate, upper sealing plate, lower sealing plate, left plate, right plate, front side board, back side panel, preceding sealing plate and rear sealing plate,
The upper cover plate, lower plate, left plate, right plate, front side board, back side panel are interconnected to form a closed cavity, described
Graphite condenses the circulating water flow through-hole that block is equipped with the flue gas recirculation hole and front and back perforation of multiple row up and down, and the flue gas stream
Through-hole does not pass through mutually with circulating water flow through-hole；The upper cover plate is equipped with gas inlet, and lower plate is equipped with exhanst gas outlet, before described
Side plate lower part is equipped with circulating water intake, and the back side panel top is equipped with circulating water outlet；
The upper sealing plate and lower sealing plate are individually fixed in the upper and lower of graphite condensation block, and correspond to cigarette on upper sealing plate and lower sealing plate
The position of air-flow through-hole is equipped with flue gas via；
The edge of the upper sealing plate and lower sealing plate is fixedly connected with front, rear, left and right side plate respectively, the lower plate, lower sealing plate,
Front side board, back side panel, left plate and right plate enclose be set as it is closed into flue gas chamber, the upper cover plate, upper sealing plate, front side board, after
Side plate, left plate and right plate enclose be set as it is closed go out flue gas chamber；
The preceding sealing plate and rear sealing plate are individually fixed in the forward and backward side of graphite condensation block, and right on the preceding sealing plate and rear sealing plate
It should be equipped with recirculated water via in the position of circulating water flow through-hole；
The edge of the preceding sealing plate and rear sealing plate is fixedly connected with left plate, right plate, upper sealing plate and lower sealing plate respectively, before described
Side plate, preceding sealing plate, upper sealing plate, lower sealing plate, left plate and right plate enclose be set as it is closed into circulating water cavity, the back side panel, after
Sealing plate, upper sealing plate, lower sealing plate, left plate and right plate enclose be set as it is closed go out circulating water cavity.
2. gas fired-boiler graphite condenser according to claim 1, which is characterized in that the graphite condensing unit includes
Graphite condensing unit that is multiple setting up and down and connecting, the graphite of the exhanst gas outlet and lower section of the graphite condensing unit being located above
The gas inlet of condensing unit is connected by flue, the circulating water intake of the graphite condensing unit being located above and lower section
The circulating water outlet of graphite condensing unit is connected by circulating water pipeline.
3. gas fired-boiler graphite condenser according to claim 1, which is characterized in that every two row flue gas recirculation hole
Between be equipped with a row circulating water flow through-hole.
4. gas fired-boiler graphite condenser according to claim 1 or 3, which is characterized in that flue gas described in each column circulates
Hole includes two rounds.
5. gas fired-boiler graphite condenser according to claim 1, which is characterized in that contacted with recirculated water it is described before
Side plate, preceding sealing plate, back side panel, rear sealing plate, left plate and right plate medial surface on be coated with anti-corrosion resin layer.
6. gas fired-boiler graphite condenser according to claim 1, which is characterized in that the front side board is equipped with blind
The observation panel of plate.
7. gas fired-boiler graphite condenser according to claim 1, which is characterized in that the gas fired-boiler graphite is cold
The side of condenser is equipped with the by-pass flue of connection gas inlet and exhanst gas outlet.
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| CN201721894867.1U CN207716941U (en) | 2017-12-29 | 2017-12-29 | A kind of gas fired-boiler graphite condenser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007248A (en) * | 2017-12-29 | 2018-05-08 | 江苏省特种设备安全监督检验研究院南通分院 | A kind of gas fired-boiler graphite condenser and preparation method thereof |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007248A (en) * | 2017-12-29 | 2018-05-08 | 江苏省特种设备安全监督检验研究院南通分院 | A kind of gas fired-boiler graphite condenser and preparation method thereof |
| CN108007248B (en) * | 2017-12-29 | 2023-12-19 | 江苏省特种设备安全监督检验研究院南通分院 | Graphite condenser for gas boiler and preparation method thereof |
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