CN214842633U

CN214842633U - Gas preheater

Info

Publication number: CN214842633U
Application number: CN202120787481.0U
Authority: CN
Inventors: 王凤光; 张成朋; 崔永刚
Original assignee: Zibo Hongsheng Machinery Manufacturing Co ltd
Current assignee: Zibo Hongsheng Machinery Manufacturing Co ltd
Priority date: 2021-04-17
Filing date: 2021-04-17
Publication date: 2021-11-23
Anticipated expiration: 2031-04-17

Abstract

The utility model discloses a gas preheater, including preheater body, heat exchange tube, flush fluid distributing pipe and elevating system, the heat exchange tube sets up in the preheater body, and the steam inlet has been seted up to one side outside the preheater body, and the comdenstion water export has been seted up to one side bottom outside the preheater body, and flush fluid distributing pipe one end lets in to the preheater body, and flush fluid distributing pipe bottom intercommunication has the distribution branch pipe, and the shower nozzle is installed to distribution branch pipe bottom, and the welding of flush fluid distributing pipe top has the fixed block, and the fixed block is two about, and the welding of one side of preheater body top has the motor case; the lifting mechanism comprises a motor, a first screw rod and a second screw rod. Has the advantages that: through the design of buckling of heat exchange tube, effectively let the stroke grow of coal gas circulation in the heat exchange tube, increase the preheating time of coal gas in the heat exchange tube, it is better to preheat the effect, through the elevating system who sets up for in the shower nozzle descends the heat exchange tube mouth, played good washing effect, effectively avoided the waste of flush fluid.

Description

Gas preheater

Technical Field

The utility model relates to a heat exchange technology field particularly, relates to a coal gas preheater.

Background

The gas preheater is characterized in that coke oven gas from an air blower is indirectly heated to 60-80 ℃ through steam, the gas passes through the preheater from bottom to top, the steam carries out convection heat exchange from top to bottom, the gas enters a saturator, hot gas evaporates excessive moisture in the saturator, the water balance in the saturator is kept, the gas preheater adopts a tubular heat exchanger, the heat exchange tube is a heat exchange tube with the inner diameter of 32mm, the heat exchange tube is a honeycomb-shaped tube bundle arranged along the gas flow direction, the heat exchange tube is thin in diameter, the carbon steel material is easy to rust and rough in surface, impurities such as tar, tar slag and the like in the coke oven gas are deposited and agglomerated on the inner wall of the tube, the impurities are easy to lose water and thicken, are gradually accumulated and carbonized and agglomerated to block a pipeline, the gas flow is not smooth, the resistance of the preheater is too large and exceeds 2000Pa (the resistance is below 500Pa under the normal condition), the load of a fan for conveying the coke oven gas is too large, and the saturator the gas is stopped, the preheater is disassembled for manual cleaning, and the shutdown and overhaul times of the saturator are increased.

When current coal gas preheater is washing the heat transfer pipe, because the pipeline is vertical, have some flush fluid to spout from the upper end and directly flow to the lower extreme, do not contact the caking of waiting to wash, do not play the effect of washing to the caking, and the shower nozzle can only spray wash partly heat transfer pipe, cause partly pipeline can't contact the spray rinsing liquid, has wasted the flush fluid, and coal gas retention time is short in the heat transfer pipe simultaneously, and preheating time is short, and preheating effect is poor.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a coal gas preheater to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a coal gas preheater comprises a preheater body, a heat exchange tube, a flushing fluid distribution tube and a lifting mechanism, wherein the heat exchange tube is arranged in the preheater body, a steam inlet is formed in one side outside the preheater body, a condensate water outlet is formed in the bottom of one side outside the preheater body, one end of the flushing fluid distribution tube is introduced into the preheater body, the bottom end of the flushing fluid distribution tube is communicated with a distribution branch tube, a spray head is installed at the bottom end of the distribution branch tube, a fixed block is welded at the top end of the flushing fluid distribution tube, the fixed block is divided into a left block and a right block, and a motor box is welded on one side of the top of the preheater body;

the lifting mechanism comprises a motor, a first screw rod and a second screw rod.

Further, elevating system's motor passes through the bolt fastening in the motor case, the output of motor is connected with first lead screw, the first lead screw other end lets in this internal top of preheater, the welding of the first lead screw other end has the second lead screw, first lead screw is the positive thread, the second lead screw is the reverse thread, the second lead screw other end is connected with preheater body one side inner wall rotation through the bearing frame that sets up.

Furthermore, the lifting mechanism further comprises a first threaded sleeve, a second threaded sleeve and a connecting piece, the first threaded sleeve of the lifting mechanism is connected to the first screw rod through threads, and the second threaded sleeve of the lifting mechanism is connected to the second screw rod through threads.

Further, be provided with the connecting piece between first thread bush and the second thread bush and the fixed block respectively, the connecting piece top is rotated through the pivot that sets up and is connected with first thread bush and second thread bush, the connecting piece bottom is rotated through the pivot that sets up and is connected with the fixed block.

Further, the top ends of the first threaded sleeve and the second threaded sleeve are welded with sliding blocks, sliding grooves are formed in the inner wall of the top of the preheater body, the top ends of the sliding blocks are arranged in the sliding grooves in a sliding mode, and the sliding blocks are matched with the sliding grooves in shape and size.

Compared with the prior art, the utility model discloses following beneficial effect has: through the design of buckling of heat exchange tube, effectively let the stroke grow of coal gas circulation in the heat exchange tube, increase the preheating time of coal gas in the heat exchange tube, it is better to preheat the effect, through the elevating system who sets up, can realize the height of decline flush fluid distributing pipe, make the shower nozzle descend in the heat exchange tube mouth, the shower nozzle spouts the inner wall of heat exchange tube to the flushing liquid on, then flow downwards along the inner wall, whole pipeline can all be by the sanitization, good washing effect has been played, the waste of flush fluid has effectively been avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a gas preheater according to an embodiment of the present invention;

fig. 2 is an enlarged view of a portion a in fig. 1 according to an embodiment of the present invention.

Reference numerals:

1. a preheater body; 2. a heat exchange pipe; 3. a steam inlet; 4. a condensed water outlet; 5. a flushing liquid distribution pipe; 6. a distribution branch pipe; 7. a spray head; 8. a fixed block; 9. a motor case; 10. a motor; 11. a first lead screw; 12. a second lead screw; 13. a bearing seat; 14. a first threaded sleeve; 15. a second threaded sleeve; 16. a connecting member; 17. a rotating shaft; 18. a slider; 19. a chute.

Detailed Description

The following, with reference to the drawings and the detailed description, further description of the present invention is made:

referring to fig. 1-2, a gas preheater according to an embodiment of the present invention includes a preheater body 1, a heat exchange tube 2, a washing liquid distribution tube 5 and a lifting mechanism, wherein the heat exchange tube 2 is disposed in the preheater body 1, a stroke of gas flowing through the heat exchange tube 2 is effectively increased by bending the heat exchange tube 2, a preheating time of the gas in the heat exchange tube 2 is increased, a preheating effect is better, a steam inlet 3 is disposed at one side of the exterior of the preheater body 1, a condensed water outlet 4 is disposed at a bottom of the exterior of the preheater body 1, one end of the washing liquid distribution tube 5 is introduced into the preheater body 1, a distribution branch tube 6 is communicated with a bottom end of the washing liquid distribution tube 5, a spray head 7 is mounted at a bottom end of the distribution branch tube 6, a fixing block 8 is welded at a top end of the washing liquid distribution tube 5, the fixing block 8 is left or right, a motor box 9 is welded on one side of the top of the preheater body 1;

the lifting mechanism comprises a motor 10, a first screw rod 11 and a second screw rod 12.

Through the above scheme of the utility model, the motor 10 of the lifting mechanism is fixed in the motor box 9 through bolts, the output end of the motor 10 is connected with the first lead screw 11, the other end of the first lead screw 11 is introduced into the top of the preheater body 1, the other end of the first lead screw 11 is welded with the second lead screw 12, the first lead screw 11 is a positive thread, the second lead screw 12 is a negative thread, the other end of the second lead screw 12 is rotatably connected with the inner wall of one side of the preheater body 1 through the arranged bearing seat 13, the lifting mechanism further comprises the first thread bush 14, the second thread bush 15 and the connecting piece 16, the first thread bush 14 of the lifting mechanism is connected on the first lead screw 11 through threads, the second thread bush 15 of the lifting mechanism is connected on the second lead screw 12 through threads, the connecting piece 16 is respectively arranged between the first thread bush 14 and the second thread bush 15 and the fixed block 8, the top end of the connecting piece 16 is rotatably connected with the first threaded sleeve 14 and the second threaded sleeve 15 through the rotating shaft 17, the bottom end of the connecting piece 16 is rotatably connected with the fixed block 8 through the rotating shaft 17, the height of the flushing liquid distribution pipe 5 can be reduced, the spray head 7 is lowered into the pipe orifice of the heat exchange pipe 2, the spray head 7 sprays the flushing liquid onto the inner wall of the heat exchange pipe 2, then the flushing liquid flows downwards along the inner wall, the whole pipeline can be cleaned, a good flushing effect is achieved, the waste of the flushing liquid is effectively avoided, sliding blocks 18 are welded at the top ends of the first threaded sleeve 14 and the second threaded sleeve 15, a sliding groove 19 is formed in the inner wall of the top of the body 1, the top ends of the sliding blocks 18 are arranged in the sliding groove 19 in a sliding mode, and the sliding blocks 18 are matched with the sliding groove 19 in shape and size.

When specifically using, through the design of buckling of heat exchange tube 2, effectively let the stroke grow of coal gas circulation in heat exchange tube 2, increase the preheating time of coal gas in heat exchange tube 2, it is better to preheat the effect, starter motor 10, motor 10 controls first lead screw 11 and second lead screw 12 and rotates, make first thread bush 14 and the 15 opposite movements of second thread bush, promote connecting piece 16 and fixed block 8, can realize descending flush fluid distribution pipe 5's height, make shower nozzle 7 descend in heat exchange tube 2 mouth, shower nozzle 7 spouts the inner wall of heat exchange tube 2 with the flushing liquid, then flow down along the inner wall, whole pipeline can all be by the sanitization, good washing effect has been played, the waste of flush fluid has effectively been avoided.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The coal gas preheater is characterized by comprising a preheater body (1), heat exchange tubes (2), a washing fluid distribution tube (5) and a lifting mechanism, wherein the heat exchange tubes (2) are arranged in the preheater body (1), a steam inlet (3) is formed in one side of the outer side of the preheater body (1), a condensed water outlet (4) is formed in the bottom of the one side of the outer side of the preheater body (1), one end of the washing fluid distribution tube (5) is led into the preheater body (1), a distribution branch tube (6) is communicated with the bottom end of the washing fluid distribution tube (5), a spray head (7) is installed at the bottom end of the distribution branch tube (6), a fixing block (8) is welded at the top end of the washing fluid distribution tube (5), the fixing block (8) is divided into a left part and a right part, and a motor box (9) is welded at one side of the top of the preheater body (1);

the lifting mechanism comprises a motor (10), a first screw rod (11) and a second screw rod (12).

2. The gas preheater as claimed in claim 1, wherein a motor (10) of the lifting mechanism is fixed in a motor box (9) through a bolt, the output end of the motor (10) is connected with a first screw rod (11), the other end of the first screw rod (11) is communicated with the inner top of the preheater body (1), a second screw rod (12) is welded at the other end of the first screw rod (11), the first screw rod (11) is a positive thread, the second screw rod (12) is a reverse thread, and the other end of the second screw rod (12) is rotatably connected with the inner wall of one side of the preheater body (1) through a bearing seat (13).

3. A gas preheater according to claim 1, wherein the lifting mechanism further comprises a first threaded sleeve (14), a second threaded sleeve (15) and a connecting member (16), the first threaded sleeve (14) of the lifting mechanism is connected to the first lead screw (11) by a screw thread, and the second threaded sleeve (15) of the lifting mechanism is connected to the second lead screw (12) by a screw thread.

4. The gas preheater as claimed in claim 3, wherein connecting pieces (16) are respectively arranged between the first threaded sleeve (14) and the second threaded sleeve (15) and the fixed block (8), the top end of each connecting piece (16) is rotatably connected with the first threaded sleeve (14) and the second threaded sleeve (15) through a rotating shaft (17), and the bottom end of each connecting piece (16) is rotatably connected with the fixed block (8) through the rotating shaft (17).

5. The gas preheater according to claim 3, wherein sliding blocks (18) are welded to the top ends of the first threaded sleeve (14) and the second threaded sleeve (15), sliding grooves (19) are formed in the inner wall of the top of the preheater body (1), the top ends of the sliding blocks (18) are slidably arranged in the sliding grooves (19), and the sliding blocks (18) are matched with the sliding grooves (19) in shape and size.