CN2544227Y - Pot sheel type oil and gas combustion water-boiling boiler - Google Patents

Abstract

A shell oil gas burning hot-water boiler comprises a shell, a water return pipe and a reversal chamber arranged in a back cavity of the shell. The front end of the reversal chamber is provided with a front tube sheet and the front tube sheet is provided with flue header pipelines that are distributed densely. The utility model is characterized in that the water return pipe runs through the upper wall of the top part of the shell, moreover, a nozzle of the water return pipe faces right the upper side wall of the front tube sheet of the reversal chamber. The utility model increases the perturbation in the water flow of the front tube sheet of the reversal chamber and the dense distribution area of flue header owing to the water return pipe that is arranged on the top part of the shell and runs through the upper wall of the shell, moreover, the nozzle faces right the upper side wall of the front tube sheet of the reversal chamber, thus, through the high-speed washing of the water flow, the local temperature is reduced and the air bubble is carried away quickly so as to avoid the high-frequency temperature alternating stress of the tube sheet and solve the problem of cracking of the tube sheet, thereby effectively prolonging the service life of the boiler.

Description

A kind of pan shell type fuel homogeneous solution-type reactor

Technical field

The utility model relates to a kind of boiler, particularly a kind of pan shell type fuel homogeneous solution-type reactor.

Background technology

The existing horizontal three backhaul pan shell type fuel vapor boilers chamber of strile-bacing, exist the gap between the pore of front tube sheet and the smoke pipe outer wall, although adopt the method for pre-expand tube head to eliminate the gap from technology, but effect is undesirable, when boiler is worked, is present in water in the gap back that is heated and heats up and become steam, produce bubble, because the gap is little, water becomes bubble, and volume increases, bubble is wanted to run out very because of difficulty in the gap of narrow candle rapidly, the bubble that does not come out from narrow slit continues to absorb heat, and it is big that bubble becomes, the water around squeezing, bubble transmit heat than water slowly many, caused tube sheet high temperature before bubble breaks during this period of time, the heat transmission is not gone out, and forms the dry combustion method situation.Bubble constantly breaks after the heat absorption, and water at low temperature just is full of former bubble space, form like this " low temperature → high temperature → low temperature " so frequent repeatedly making chamber header board that strile-backs produce alternate stress and fatigue damage, the pore of tube sheet and smoke pipe pipe end are ftractureed.For solving above-mentioned existing problems, utilize the current of water return outlet to reach the method for cooling off smoke pipe and front tube sheet in the prior art, its water return outlet is arranged the two kinds of forms that mainly contain: the one, and return pipe feeds boiler bottom, rely on cold water constantly to absorb heat, temperature raises, and density reduces, and progressively rises to the boiler top from boiler bottom, send hot water from the boiler delivery port, realize the circulation of water.This water return outlet is arranged the smoke pipe close quarters cooling of the chamber header board water side of strile-bacing not enough, because of water velocity is low, is unfavorable for taking away very much bubble, and regional area causes subcooled boiling, produces the alternation fatigue stress, and this zone tube sheet very easily ftractures, leaks from pore.Another kind is that the border adds dividing plate in shell, and water conservancy diversion makes the backwater flow velocity improve the water side of washing away the chamber front tube sheet that strile-backs.But the installation of this dividing plate is difficulty relatively, and utilizes dividing plate to improve water speed to be very limited, can not to take away bubble equally, same local overcooling boiling in postpartum.

Summary of the invention

The pan shell type fuel homogeneous solution-type reactor that provides a kind of can effectively prevent to strile-back chamber front tube sheet and smoke pipe outer wall to crack at above-mentioned existing problems is provided order of the present utility model.

A kind of pan shell type fuel homogeneous solution-type reactor, comprise shell, return pipe and be located at the chamber of strile-bacing of back cavity in the shell, the described chamber front end that strile-backs is provided with front tube sheet, the front tube sheet wooden partition is provided with the smoke pipe pipeline that is dense distribution, and return pipe passes shell top upper wall and the return pipe mouth of pipe upper side wall over against the chamber front tube sheet that strile-backs.

The utility model passes the shell upper wall and the mouth of pipe structure over against the return pipe of the chamber front tube sheet upper side wall that strile-backs owing to employing is provided with at the shell top, increased current disturbance to the densely covered zone of chamber front tube sheet and smoke pipe of strile-bacing, by washing away of current high speed, local temperature is minimized, can take away bubble rapidly again, avoided tube sheet to produce high-frequency temperature alternating stress, solved the tube sheet cracking problem, thereby effectively prolonged the service life of boiler.

Description of drawings

Fig. 1 is the positive schematic diagram of arranging of the utility model water return pipeline;

Fig. 2 is the utility model water return pipeline side arrangement schematic diagram.

The specific embodiment

As shown in Figure 1 and Figure 2, the utility model comprises shell 1, return pipe 2 and is located at the chamber 3 of strile-bacing of back cavity in the shell 1, described chamber 3 front ends that strile-back are provided with front tube sheet 4, front tube sheet 4 wooden partitions are provided with the smoke pipe pipeline 5 that is dense distribution, and described return pipe 2 passes shell 1 top upper wall and return pipe 2 mouths of pipe upper side wall over against chamber 3 front tube sheets 4 that strile-back.

The preparation of the above-mentioned return pipe 2 and chamber 3 front tube sheets 4 that strile-back is achieved in that at first processes the fabrication hole that return pipe 2 can be passed shell at shell 1 top and front tube sheet 4 relevant positions, return pipe 2 is passed fabrication hole and make return pipe 2 mouths of pipe, by welding method return pipe 2 is welded on the shell 1 then over against front tube sheet 4 upper side walls.Described front tube sheet 4 upper side walls are equipped with intensive smoke pipe pipeline 5, for the backwater in the return pipe 2 can be cooled off and bubble be discharged with front tube sheet 4 joint portions apace to front tube sheet 4 upper side wall smoke pipe pipelines 5, front tube sheet 4 be provided with the water stream channel 6 that can make backwater flow to front tube sheet 4 and each smoke pipe pipeline 5 joint portion rapidly over against return pipe 2 mouth of pipe places, for making current can flow to smoke pipe pipeline compact district uniformly, above-mentioned return pipe 2 is processed into the bend pipe that has angle of bend, its angle of bend is 120～145 °, preferred values adopts 135 °, port at return pipe 2 elbows also is provided with certain oblique angle, this oblique angle is 30～55 °, and preferred values is 45 °.Above-mentioned return pipe 2 can adopt metal pipe material to bend and form.The utility model since be provided with at shell 1 top pass shell 1 upper wall and the mouth of pipe return pipe 2 over against chamber 3 front tube sheets, 4 upper side walls that strile-back, increased chamber 3 front tube sheets 4 and the densely covered regional current disturbance of smoke pipe of strile-bacing, by washing away of current high speed, local temperature is minimized, can take away bubble rapidly again, avoided tube sheet to produce high-frequency temperature alternating stress, solved the tube sheet cracking problem, thereby effectively prolonged the service life of boiler.

Claims (4)

1, a kind of pan shell type fuel homogeneous solution-type reactor, comprise shell (1), return pipe (2) and be located at the chamber of strile-bacing (3) of back cavity in the shell, the described chamber of strile-bacing (3) front end is provided with front tube sheet (4), front tube sheet (4) wooden partition is provided with the smoke pipe pipeline (5) that is dense distribution, it is characterized in that return pipe (2) passes shell (1) top upper wall and return pipe (2) mouth of pipe upper side wall over against the chamber of strile-bacing (3) front tube sheet (4).

2,, it is characterized in that above-mentioned front tube sheet (4) and be provided with the water stream channel (6) that can make backwater flow to front tube sheet (4) and each smoke pipe pipeline joint portion rapidly over against return pipe (2) mouth of pipe place according to the described a kind of pan shell type fuel homogeneous solution-type reactor of claim 1.

3, according to the described a kind of pan shell type fuel homogeneous solution-type reactor of claim 1, it is characterized in that above-mentioned return pipe (2) is a metal winding pipe, the angle of bend of this bend pipe is 100～160 °, and preferred values is 135 °.

4, according to power 1 or weigh 3 described pan shell type fuel homogeneous solution-type reactors, the port that it is characterized in that above-mentioned return pipe (2) pipe bend is 30～55 ° a scarf, 45 ° of its preferred valueses.