CN210740437U

CN210740437U - Fire tube type heating furnace capable of removing scale integrally

Info

Publication number: CN210740437U
Application number: CN201921105619.3U
Authority: CN
Inventors: 董书文
Original assignee: Qingdao Hongxintian Machinery Co ltd
Current assignee: Qingdao Hongxintian Machinery Co ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-06-12
Anticipated expiration: 2029-07-16

Abstract

The utility model relates to a fire tube heating furnace of whole scale removal, including the furnace body, several scale removal mechanism, each are installed to the length direction of tobacco pipe and firetube in this furnace body scale removal mechanism pass through power unit drive, this scale removal mechanism removes along the guiding mechanism who installs in the furnace body under power unit's drive, the bottom of this furnace body is provided with the collection dirt mechanism with the inside intercommunication of furnace body. The utility model has the advantages that: the integral descaling of the smoke tube and the fire tube in the furnace body is realized, so that the dirt on the outer surfaces of the smoke tube and the fire tube is timely treated, the problems of low heat efficiency and serious tube explosion caused by untimely dirt cleaning of the fire tube type heating furnace are solved, and the heat efficiency is greatly improved.

Description

Fire tube type heating furnace capable of removing scale integrally

Technical Field

The utility model relates to a fire tube type heating furnace with integral descaling function.

Background

At present, the fire tube type heating furnaces used for the ternary polymerization driving process in the petroleum drilling and production industry are all traditional heating furnaces without scale removal devices (only few are provided with local scale removal devices). In the operation process of the heating furnace, the circulating water containing the catalyst in the shell side medium contains calcium carbonate, silt particles, oil stains and the like. Resulting in the formation of scale formation of 3cm in thickness and scale deposition of 6-7cm in thickness on the outer surfaces of the fire tubes and flue tubes of the furnace after the furnace has been operated for a certain period of time. This results in a significant reduction in the thermal efficiency of the furnace, mostly at 40% -60% operation. Causing great waste of energy. More seriously, the temperature of the tube wall of the fire tube at the position outside the fire-resistant layer at the flame inlet is as high as more than 800 ℃. The fire tube is severely deformed and cracked. Serious production accidents causing pipe explosion often occur. Aiming at the problem which troubles the petroleum industry for many years. We have conducted a great deal of research. The on-line intelligent integral descaling fire-tube type heating furnace is designed. Fundamentally has solved the problem that the thermal efficiency is low, tube explosion often takes place.

Disclosure of Invention

For overcoming the defects of the prior art, the utility model provides a fire tube type heating furnace with integral descaling function, the technical scheme of the utility model is that:

the fire tube type heating furnace with integral descaling function comprises a furnace body, wherein a plurality of descaling mechanisms are arranged in the length direction of a smoke tube and the fire tube in the furnace body, each descaling mechanism is driven by a power mechanism, the descaling mechanisms move along a guide mechanism arranged in the furnace body under the driving of the power mechanism, and a descaling mechanism communicated with the inside of the furnace body is arranged at the bottom of the furnace body.

And a thermal compensation suspension support is arranged on the smoke pipe in the furnace body.

Each descaling mechanism include the suit at tobacco pipe and the peripheral ring flange of firepipe, the ring flange with corresponding firepipe and tobacco pipe sliding fit, at each the side of ring flange installs annular steel brush, this annular steel brush and the contact of corresponding tobacco pipe and firepipe, and this annular steel brush along with ring flange reciprocating motion, still include the nut that is located the tobacco pipe and the middle part of firepipe, nut and each tobacco pipe and firepipe between install the connecting rod, wherein, be provided with the breach on the ring flange and the annular steel brush that pass thermal compensation suspension support.

The power mechanism comprises a positive and negative rotating motor, a speed reducer, a gear box, a driving bevel gear, a driven bevel gear and a screw rod, wherein the speed reducer is installed on a motor shaft of the positive and negative rotating motor, the positive and negative rotating motor and the speed reducer are installed outside the furnace body, a driving bevel gear shaft is installed on an output shaft of the speed reducer, the driving bevel gear shaft extends into the gear box in the furnace body and then is installed with the driving bevel gear, the driving bevel gear shaft is arranged along the vertical direction, the screw rod is arranged along the horizontal direction, one end of the screw rod is connected with one end of the driven bevel gear shaft through a coupler, the other end of the driven bevel gear shaft extends into the gear box and is installed with the driven bevel gear, the driven bevel gear is meshed with the driving bevel gear.

Thermal compensation hangs the support and includes backing plate, bolt and hanger plate, backing plate fixed mounting at the inner wall of furnace body the backing plate on install two first clamp splices, form the interval between two first clamp splices, the second clamp splice is installed through the bolt to the lower part of each first clamp splice, interval between two second clamp splices is less than the interval between two first clamp splices, forms T type groove between two first clamp splices and two second clamp splices wholly, the hanger plate be the setting of T style of calligraphy, the gliding installation in T type inslot in this hanger plate upper portion is spacing by T type groove, install on the tobacco pipe after T type groove is worn out to this hanger plate lower part, the breach is used for the hanger plate lower part to pass.

The guiding mechanism comprises a guide rail, a guide frame, guide wheels and a vertical rod, the vertical rod is installed between the fire tube and the adjacent fire tube, the guide frame is T-shaped, one end of the guide frame is vertically installed on the vertical rod, the other end of the guide frame is provided with two guide wheels, the two guide wheels are located on two sides of the guide rail and are in rolling fit with the guide rail, and the guide rail is fixedly installed on the inner wall of the furnace body and is arranged along the horizontal direction.

The furnace body is obliquely arranged.

The scale collecting mechanism comprises a collecting tank, a gate valve and a dust collecting pipe, wherein a dust removing opening is formed in the lower end of the furnace body, the collecting tank is installed at the dust removing opening through the gate valve, and the dust collecting pipe communicated with the pump body is installed on the collecting tank.

The number of the fire tubes is two, the number of the smoke tubes is four, and the flange plates on the peripheries of the two fire tubes and the flange plates on the peripheries of the two adjacent smoke tubes are connected through supporting rods.

The utility model has the advantages that: the integral descaling of the smoke tube and the fire tube in the furnace body is realized, so that the dirt on the outer surfaces of the smoke tube and the fire tube is timely treated, the problems of low heat efficiency and serious tube explosion caused by untimely dirt cleaning of the fire tube type heating furnace are solved, and the heat efficiency is greatly improved.

Drawings

Fig. 1 is a schematic view of the main structure of the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a schematic structural view of the guide mechanism in fig. 1.

Fig. 4 is a schematic view of the construction of the thermally compensated suspension mount of fig. 1.

Detailed Description

The invention will be further described with reference to specific embodiments, the advantages and features of the invention will become more apparent as the description proceeds. These examples are merely illustrative and do not limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications are intended to be included within the scope of the invention.

Referring to fig. 1 to 4, the utility model relates to a fire tube type heating furnace with integral scale removal, which comprises a furnace body 18, a plurality of descaling mechanisms are arranged in the length direction of the smoke tube 24 and the fire tube 23 in the furnace body 18, each descaling mechanism is driven by a power mechanism, the descaling mechanism moves along a guide mechanism arranged in the furnace body 18 under the driving of a power mechanism, the bottom of the furnace body 18 is provided with a scale collecting mechanism communicated with the interior of the furnace body 18, the scale collecting mechanism can periodically extract deposited scales accumulated in the furnace body, the furnace body is obliquely installed when being installed, the scale at the bottom of the furnace body flows to the scale collecting mechanism, the number of the fire tubes 23 in the furnace body is two, the number of the smoke tubes 24 is four, one fire tube 23 is communicated with the two smoke tubes 24 through a bent tube, and the flange plates 4 on the peripheries of the two fire tubes 23 and the flange plates 4 on the peripheries of the two adjacent smoke tubes are connected through the support rod 17.

The smoke tube 24 in the furnace body 18 is provided with a thermal compensation suspension support.

Usually, a plurality of supporting baffles 6 are installed between the fire tubes and the flue tubes of the existing furnace body for fixing the flue tubes and the flue tubes, a descaling mechanism is installed between two adjacent supporting baffles 6 of coal, each descaling mechanism comprises a flange 4 sleeved on the peripheries of the flue tubes 24 and the flue tubes 23, the flange 4 is in sliding fit with the corresponding flue tubes and the flue tubes (a flange is sleeved on the periphery of each flue tube and the flue tubes), an annular steel wire brush 3 is installed on the side surface of each flange 4, the annular steel wire brush 3 is in contact with the corresponding flue tubes and the flue tubes, and the annular steel wire brush reciprocates along with the flange and is used for cleaning the scale on the peripheries of the flue tubes and the flue tubes, the descaling mechanism further comprises nuts 27 located at the middle parts of the flue tubes 24 and the flue tubes 23, and connecting rods 28 are installed between the nuts 27 and each flue tubes 24 and the flue tubes 23, wherein, the flange plate and the annular steel wire brush which penetrate through the thermal compensation suspension support are provided with notches.

The power mechanism comprises a positive and negative rotating motor 19, a speed reducer 7, a gear box 22, a driving bevel gear 21, a driven bevel gear 8 and a screw 12, the speed reducer 7 is arranged on a motor shaft of the positive and negative rotating motor 19, the forward and reverse rotation motor 19 and the reducer 7 are installed outside the furnace body 18, the output shaft of the reducer 7 is installed with a driving bevel gear shaft 20, the driving bevel gear shaft 20 extends into a gear box 22 in the furnace body 18 and is provided with the driving bevel gear 20, the driving bevel gear shaft 20 is arranged along the vertical direction, the screw 12 is arranged along the horizontal direction, one end of the screw 12 is connected with one end of a driven bevel gear shaft 9 through a coupler 10, the other end of the driven bevel gear shaft 9 extends into a gear box 22 and is provided with a driven bevel gear 8, the driven bevel gear 8 is meshed with the driving bevel gear 21, and the other end of the screw 12 sequentially passes through nuts 27 of all descaling mechanisms.

The thermal compensation suspension support comprises a base plate 31, a bolt 34 and a hanging plate 35, wherein the base plate 31 is fixedly installed on the inner wall of the furnace body 18, two first clamping blocks are installed on the base plate 31, a distance is formed between the two first clamping blocks 32, a second clamping block 33 is installed on the lower portion of each first clamping block 32 through the bolt 34, the distance between the two second clamping blocks 33 is smaller than the distance between the two first clamping blocks, a T-shaped groove is integrally formed between the two first clamping blocks 32 and the two second clamping blocks 33, the hanging plate 35 is arranged in a T-shaped mode, the upper portion of the hanging plate 35 is slidably installed in the T-shaped groove and limited by the T-shaped groove, the lower portion of the hanging plate is installed on a smoke pipe after penetrating through the T-shaped groove, and a gap is used for penetrating through the lower portion of the hanging plate.

The guide mechanism comprises a guide rail 15, a guide frame 16, guide wheels 30 and a vertical rod 29, the vertical rod 29 is installed between the fire tube 23 and the adjacent fire tube 24, the guide frame 16 is arranged in a T shape, one end of the guide frame is vertically installed on the vertical rod 29, the other end of the guide frame is provided with two guide wheels 30, the two guide wheels 30 are positioned on two sides of the guide rail and are in rolling fit with the guide rail 15, and the guide rail 15 is fixedly installed on the inner wall of the furnace body and is arranged along the horizontal direction.

The dirt collecting mechanism comprises a collecting tank 1, a gate valve 14 and a dust suction pipe, a dust removing opening is formed in the lower end of the furnace body 18, the collecting tank 1 is installed at the dust removing opening through the gate valve 14, and the dust suction pipe communicated with a pump body is installed on the collecting tank 1.

The utility model discloses a theory of operation is: the reciprocating rotation motor 19 of the power mechanism rotates to drive the speed reducer 7 to rotate, and sequentially drives the driving bevel gear shaft 20 to transmit power to the driven bevel gear shaft 9 and the screw rod 21, when the screw rod rotates, the screw rod is in running fit with the nut, and the screw rod penetrates through the bearing seat 11 to drive the flange plates and the annular steel wire brushes of all the descaling mechanisms to reciprocate along the axial direction of the smoke tube and the fire tube, so that the aim of removing scale accumulated on the outer surface of the heat exchange tube is fulfilled.

The thermal compensation suspension support is arranged for preventing welding seams of the smoke tube from cracking due to vibration generated by overlarge support distance, and the T-shaped groove formed by the first clamping block and the second clamping block limits the lifting plate to move in the vertical direction, so that the lifting plate is allowed to be subjected to axial displacement of the smoke tube due to thermal expansion.

Claims

1. The fire tube type heating furnace with integral descaling function comprises a furnace body and is characterized in that a plurality of descaling mechanisms are arranged in the length direction of smoke tubes and fire tubes in the furnace body, each descaling mechanism is driven by a power mechanism, the descaling mechanisms move along a guide mechanism arranged in the furnace body under the driving of the power mechanism, and a descaling mechanism communicated with the interior of the furnace body is arranged at the bottom of the furnace body.

2. The fire tube furnace for integral descaling of claim 1, wherein the smoke tube in the furnace body is provided with a thermal compensation suspension support.

3. The fire tube heating furnace with integral descaling function of claim 2, wherein each descaling mechanism comprises a flange plate sleeved on the periphery of the fire tube and the fire tube, the flange plate is in sliding fit with the corresponding fire tube and the fire tube, an annular steel wire brush is arranged on the side surface of each flange plate, the annular steel wire brush is in contact with the corresponding fire tube and the fire tube, the annular steel wire brush moves back and forth along with the flange plate, a nut is arranged in the middle of the fire tube and the fire tube, a connecting rod is arranged between the nut and each fire tube and fire tube, and notches are arranged on the flange plate and the annular steel wire brush which penetrate through the thermal compensation suspension support.

4. The fire tube heating furnace with integral descaling according to claim 2 or 3, the power mechanism comprises a positive and negative rotating motor, a speed reducer, a gear box, a driving bevel gear, a driven bevel gear and a screw rod, the speed reducer is arranged on a motor shaft of the positive and negative rotating motor, the positive and negative rotating motor and the reducer are arranged outside the furnace body, the output shaft of the reducer is provided with a driving bevel gear shaft, the driving bevel gear shaft extends into a gear box in the furnace body and is provided with a driving bevel gear, the driving bevel gear shaft is arranged along the vertical direction, the screw rod is arranged along the horizontal direction, one end of the screw is connected with one end of a driven bevel gear shaft through a coupler, the other end of the driven bevel gear shaft extends into the gear box and is provided with a driven bevel gear, the driven bevel gear is meshed with the driving bevel gear, and the other end of the screw penetrates through nuts of all the descaling mechanisms in sequence.

5. The fire tube heating furnace with integral descaling function according to claim 3, wherein the thermal compensation suspension support comprises a backing plate, a bolt and a hanging plate, the backing plate is fixedly installed on the inner wall of the furnace body, two first clamping blocks are installed on the backing plate, a space is formed between the two first clamping blocks, a second clamping block is installed on the lower portion of each first clamping block through the bolt, the space between the two second clamping blocks is smaller than the space between the two first clamping blocks, a T-shaped groove is integrally formed between the two first clamping blocks and the two second clamping blocks, the hanging plate is arranged in a T shape, the upper portion of the hanging plate is slidably installed in the T-shaped groove and limited by the T-shaped groove, the lower portion of the hanging plate penetrates through the T-shaped groove and then is installed on the smoke tube, and the notch is used for the lower portion of the hanging plate to penetrate through.

6. The fire tube heating furnace with integral descaling function of claim 3, wherein the guiding mechanism comprises a guide rail, a guiding frame, guide wheels and an upright rod, the upright rod is installed between the fire tube and the adjacent fire tube, the guiding frame is arranged in a T shape, one end of the guiding frame is vertically installed on the upright rod, the other end of the guiding frame is provided with two guide wheels, the two guide wheels are positioned at two sides of the guide rail and are in rolling fit with the guide rail, and the guide rail is fixedly installed on the inner wall of the furnace body and is arranged along the horizontal direction.

7. The fire tube furnace for integral descaling according to claim 1, wherein the furnace body is disposed obliquely.

8. The fire tube heating furnace with integral descaling function according to claim 7, wherein the descaling mechanism comprises a collecting tank, a gate valve and a dust suction pipe, the lower end of the furnace body is provided with a dust removal port, the collecting tank is arranged at the dust removal port through the gate valve, and the collecting tank is provided with the dust suction pipe communicated with the pump body.

9. The integrated descaling fire barrel heating furnace of claim 3, wherein the number of the fire tubes is two, the number of the fire tubes is four, and flanges at the peripheries of the two fire tubes and flanges at the peripheries of two adjacent fire tubes are connected through a support rod.