CN2906526Y - Sealing device on the end of shell-and-tube air preheater heat exchange tube - Google Patents
Sealing device on the end of shell-and-tube air preheater heat exchange tube Download PDFInfo
- Publication number
- CN2906526Y CN2906526Y CN 200620033577 CN200620033577U CN2906526Y CN 2906526 Y CN2906526 Y CN 2906526Y CN 200620033577 CN200620033577 CN 200620033577 CN 200620033577 U CN200620033577 U CN 200620033577U CN 2906526 Y CN2906526 Y CN 2906526Y
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- tube
- heat exchange
- heat exchanger
- air preheater
- air
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a sealing device on heat exchange tube end of calandria air preheater, which comprises a heat exchange tube, a tube plate arranged on one end of heat exchange tube and a packing seal device arranged outside of each tube plate, the tube plate comprises an upper tube plate and a lower tube plate fitted over the heat exchange tube, the upper and lower tube plates are connected each other through an annular short piece on periphery of all heat exchange tubes, one or more air inlet pipes are arranged on the short piece. The utility model can effectively avoid air leaking in tube fume, increase the input temperature of the air preheater for bearing fume to 1000 degrees Celsius or more, meanwhile the utility model has advantages of long performance life, simple structure and low manufacturing cost, long running at high temperature safely and reliably can be ensured.
Description
Technical field
The utility model relates to a kind of shell and tube air preheater, especially is applied in the sealing device of the shell and tube air preheater heat exchanger tube end of in the production of carbon black waste heat being reclaimed.
Background technology
Air preheater is a most important energy-saving equipment in the production of carbon black, also is to be worth expensive equipment, and its recovering effect is relevant with the flue gas intake air temperature, guarantees the normal operation of its long period requirement that also is inevitable.In production of carbon black, carbon black smoke temperature after the carbon black reaction of formation stops is about 1000 ℃～1100 ℃, the air capacity of preheater and carbon black smoke amount ratio are in certain limit, if directly utilize this temperature flue gas as preheater import heat medium, the exit gas temperature of preheater will reach more than 600 ℃.Because the particularity of production of carbon black, general employing shell and tube air preheater reclaims the heat in these carbon black smokes, there are bigger temperature difference in the shell side of air preheater and tube side, for eliminating the thermal stress influence, one end of tubulation is fixed, other end free wxpansion, free wxpansion end at tubulation is provided with sealing device, and form has following two kinds:
(1) expansion joint sealing (single tube corrugated-type expansion joint) is installed on every heat exchanger tube;
(2) heat exchanger tube and tubesheet holes are matched in clearance, and adopt single tube filling-material structure mode to seal respectively to every heat exchanger tube.
Seal form (1): the good sealing effect of this structure, though can fully use the high-temperature flue gas more than 1000 ℃ or 1000 ℃, but under high temperature (more than 600 ℃) state, there is the problem of fatigue rupture in the little expansion joint of installing, service life is shorter, and in addition, this structure heat exchanger tube spacing is bigger, the volume of unit heat exchange area is bigger, the manufacturing cost height;
Seal form (2): this structure has air in certain amount to leak in the flue gas, and the temperature of carbon black smoke outlet is when a certain temperature is following, and the leakage of little air can not cause smoke combustion; When the temperature of carbon black smoke outlet when a certain temperature is above, the air of leakage will with contain H
2, imflammable gas such as CO high temperature carbon black smoke catalytic combustion, the high temperature that burning produces will cause bad seals and production of carbon black line rear portion equipment (as bag filter) to damage.The general air preheater safe handling condition of this structure that adopts is: the smoke inlet temperature is about 780 ℃, the temperature of carbon black smoke outlet is below 550 ℃, air preheating temperature is about 650 ℃, the sealing structure can not fully be applicable to the high-temperature flue gas more than 1000 ℃ or 1000 ℃, can only carry out heat exchange to the lower carbon black smoke of temperature.If air preheater can allow the carbon black smoke temperature that enters lower, then need in carbon black smoke, spray a large amount of cooling waters more, the carbon black smoke temperature is dropped to the temperature that this air preheater can bear, thus, not only lose waste heat and increase the water consumption, and a large amount of steam causes the load of gathering system to increase, and is unfavorable for waste gas utilization.So, the gas approach temperature that air preheater can bear, how to guarantee that the flue gas tube sheet is sealed under the high temperature safety, long-time running is the important technology index of air preheater reliably.
The utility model content
The purpose of this utility model has provided a kind of sealing device that can overcome the shell and tube air preheater heat exchanger tube end of above-mentioned shortcoming, the sealing device is arranged on shell and tube air preheater heat exchanger tube free wxpansion end, it can prevent effectively that the shell side air from bleeding in the tube side flue gas, the gas approach temperature that air preheater can bear is brought up to more than 1000 ℃ or 1000 ℃, have long service life, simple in structure, advantage of low manufacturing cost simultaneously, can guarantee at high temperature safety, long-time running reliably again.
For achieving the above object, the sealing device of shell and tube air preheater heat exchanger tube of the present utility model end, comprise heat exchanger tube, be installed in heat exchanger tube one end tube sheet, place the outer stuffing seal of every heat exchanger tube in this tube sheet outside, described this tube sheet comprises the upper and lower tube sheet that is sleeved on the heat exchanger tube, upper and lower tube sheet is connected by the annular pipe nipple that places all heat exchanger tube peripheries, in the air inlet pipe that also is provided with on the pipe nipple more than one or.
Adopt the sealing device of said structure, can between two tube sheets, feed fire-retardant gas (as steam, N by air inlet pipe
2, CO
2), fire-retardant gas pressure is slightly larger than air preheater shell side inner air pressure, thereby partition shell side air bleeds in the tube side flue gas, the fire-retardant gas pressure of part can enter shell side by the gap of lower perforated plate and heat exchanger tube, mix the back with air and discharge,, also can stop the high temperature carbon black smoke and contact the generation that produces combustion phenomena with air even therefore the temperature of carbon black smoke outlet is higher by air outlet slit, heat exchanger tube freely stretches in two tubesheet holes simultaneously, and the exchange heat pipe adopts the single tube filler device to seal; The fire-retardant gas of another part is discharged by stuffing seal, makes filler avoid the high temperature air oxidation, prolongs to seal service time, guarantees at high temperature safety, long-time running reliably.
In sum, the utility model can prevent effectively that the shell side air from bleeding in the tube side flue gas, the gas approach temperature that air preheater can bear is brought up to more than 1000 ℃ or 1000 ℃, have long service life, simple in structure, advantage of low manufacturing cost simultaneously, can guarantee at high temperature safety, long-time running reliably again.
Description of drawings
Fig. 1 is the general assembly drawing of the air preheater of employing the utility model embodiment one.
Fig. 2 is the I place enlarged drawing of Fig. 1.
Fig. 3 is the general assembly drawing of the air preheater of employing the utility model embodiment two.
Fig. 4 is the II place enlarged drawing of Fig. 3.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
Embodiment one
By this air preheater shown in Figure 1 is vertical structure, be assembled by upper tube box 1, air preheater main body 2 and lower tube box 3 etc., carbon black smoke is a high-temperature medium, air is a cryogenic media, the inlet end of carbon black smoke is in the bottom, the outlet side is on top, the inlet end of air is on top, the outlet side is in the bottom, so the bottom is a high temperature section, top is low-temperature zone, carbon black smoke from the bottom to top, air carries out heat exchange by preheater from top to bottom, the tube sheet welding of heat exchanger tube 5 lower ends and lower end is connected, upper end free wxpansion, and this end is provided with sealing device; By shown in Figure 2, the annular pipe nipple 7 that the sealing device of this shell and tube air preheater heat exchanger tube end comprises heat exchanger tube 5, is sleeved on the upper and lower tube sheet 4,6 of heat exchanger tube 5 upper ends, link to each other with upper and lower tube sheet 4,6 respectively by welding, be arranged on a air inlet pipe 8 on pipe nipple 7 sides, place the outer every heat exchanger tube packing seal outward of upper perforated plate 4
Device, stuffing seal comprise the sleeve pipe 9 that is welded on upper perforated plate 4 lateral surfaces, place and compress filler 10, pressure ring 11 and clamp nut 12 in the sleeve pipe 9, and all heat exchanger tubes 5 place the inboard of annular pipe nipple 7.
Embodiment two
Be that by the air preheater of this embodiment shown in Figure 3 and the difference of embodiment one the tube sheet welding of heat exchanger tube 5 upper ends and upper end is connected, lower end free wxpansion, this end is provided with sealing device, by shown in Figure 4, the annular pipe nipple 7 that the sealing device of this shell and tube air preheater heat exchanger tube end comprises heat exchanger tube 5, is sleeved on the upper and lower tube sheet 4,6 of heat exchanger tube 5 lower ends, link to each other with upper and lower tube sheet 4,6 respectively by welding, be arranged on a air inlet pipe 8 on pipe nipple 7 sides, place the outer every heat exchanger tube stuffing seal outward of lower perforated plate 6.
The utility model also is applicable to the sealing of other fuel gas or poisonous medium, and only need select corresponding sealing medium gas.
Claims (1)
1. the sealing device of a shell and tube air preheater heat exchanger tube end, comprise heat exchanger tube, be installed in heat exchanger tube one end tube sheet, place the outer stuffing seal of every heat exchanger tube in this tube sheet outside, it is characterized in that described this tube sheet comprises the upper and lower tube sheet that is sleeved on the heat exchanger tube, upper and lower tube sheet is connected by the annular pipe nipple that places all heat exchanger tube peripheries, in the air inlet pipe that also is provided with on the pipe nipple more than one or.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620033577 CN2906526Y (en) | 2006-03-24 | 2006-03-24 | Sealing device on the end of shell-and-tube air preheater heat exchange tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620033577 CN2906526Y (en) | 2006-03-24 | 2006-03-24 | Sealing device on the end of shell-and-tube air preheater heat exchange tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2906526Y true CN2906526Y (en) | 2007-05-30 |
Family
ID=38115164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620033577 Expired - Lifetime CN2906526Y (en) | 2006-03-24 | 2006-03-24 | Sealing device on the end of shell-and-tube air preheater heat exchange tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2906526Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197126A (en) * | 2016-08-31 | 2016-12-07 | 浙江格尔泰斯环保特材科技股份有限公司 | A kind of top board of tubular type gas-gas heat exchanger |
| CN106197127A (en) * | 2016-08-31 | 2016-12-07 | 浙江格尔泰斯环保特材科技股份有限公司 | A kind of base plate of tubular type gas-gas heat exchanger |
-
2006
- 2006-03-24 CN CN 200620033577 patent/CN2906526Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197126A (en) * | 2016-08-31 | 2016-12-07 | 浙江格尔泰斯环保特材科技股份有限公司 | A kind of top board of tubular type gas-gas heat exchanger |
| CN106197127A (en) * | 2016-08-31 | 2016-12-07 | 浙江格尔泰斯环保特材科技股份有限公司 | A kind of base plate of tubular type gas-gas heat exchanger |
| CN106197127B (en) * | 2016-08-31 | 2019-06-07 | 浙江格尔泰斯环保特材科技股份有限公司 | A kind of bottom plate of tubular type gas-gas heat exchanger |
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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: 20070530 |
|
| EXPY | Termination of patent right or utility model |