CN212778754U

CN212778754U - LNG waste heat utilization device

Info

Publication number: CN212778754U
Application number: CN202021049179.7U
Authority: CN
Inventors: 邓彦军; 纪伟
Original assignee: Ruihua Special Equipment Tianjin Cryogenic Equipment Co ltd
Current assignee: Ruihua Special Equipment Tianjin Cryogenic Equipment Co ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-03-23
Anticipated expiration: 2030-06-09

Abstract

The utility model provides a LNG waste heat utilization equipment, include central water pipe, spiral intake pipe, heat transfer bucket, the shell that sets gradually from interior to exterior, the bottom of shell is connected with first inlet tube, the lower extreme of central water pipe is connected with the second inlet tube, first inlet tube and second inlet tube connection have the water inlet manifold, the top of shell is connected with first outlet pipe, the upper end of central water pipe is connected with the second outlet pipe, first outlet pipe and second outlet pipe connection have the water outlet manifold, the inside packing of heat transfer bucket has heat exchange liquid, the upper end of heat transfer bucket is worn out to the upper end of spiral intake pipe, the lower extreme of spiral intake pipe extends to the bottom of heat transfer bucket. The utility model discloses greatly increased the contact time of flue gas and heat exchange liquid, the area of increase heat exchange is more convenient for reduce the temperature of flue gas.

Description

LNG waste heat utilization device

Technical Field

The utility model belongs to the technical field of the natural gas, especially, relate to a LNG waste heat utilization equipment.

Background

The natural gas is used as an efficient, clean and low-carbon energy, the position of the natural gas in the energy structure of China is gradually improved, and the state clearly proposes that: by 2020, the natural gas consumption proportion strives to reach 10% in China. The method accelerates the development of the natural gas industry, is a necessary way for building a clean, low-carbon, safe and efficient modern energy system in China, and is an effective way for improving the atmospheric quality and realizing green and low-carbon life.

Certain smoke can be generated when a natural gas boiler, a gas turbine and the like work, the smoke contains a large amount of heat, and the heat can be recycled to save resources. For example, chinese utility model patent with publication number CN205027144U discloses a waste flue gas waste heat utilization device, and the technical effect that it reaches has: the manufacturing is simple, the heat of the waste flue gas can be efficiently utilized to heat the water, the temperature of the waste flue gas is reduced, and most of dust and particles in the waste flue gas are precipitated.

However, this patent has the following disadvantages: firstly, the residence time of the flue gas in the inner barrel is short, the heat exchange time with the inner barrel is limited, and the temperature of the flue gas cannot be well reduced; secondly, the horizontal baffle of the coal cake type is easily blocked by dust and particles in the flue gas, and the entering speed of the flue gas can be influenced for a long time.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a LNG waste heat utilization equipment to solve the not enough of prior art existence.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an LNG waste heat utilization device comprises a central water pipe, a spiral air inlet pipe, a heat exchange barrel and a shell sleeve which are sequentially arranged from inside to outside, wherein the upper end of the central water pipe penetrates out of the upper end of the heat exchange barrel, the lower end of the central water pipe penetrates out of the lower end of the heat exchange barrel, a sealed heating cavity is formed between the shell sleeve and the heat exchange barrel, the bottom of the shell sleeve is connected with a first water inlet pipe, the lower end of the central water pipe is connected with a second water inlet pipe, the first water inlet pipe and the second water inlet pipe are connected with a water inlet header pipe, the top of the shell sleeve is connected with a first water outlet pipe, the upper end of the central water pipe is connected with a second water outlet pipe, the first water outlet pipe and the second water outlet pipe are connected with a water outlet header pipe, heat exchange liquid is filled in the heat exchange barrel, the upper end of the spiral air inlet pipe penetrates out of the upper end, the upper end of the heat exchange barrel is fixedly connected with an air outlet pipe.

Furthermore, the heat exchange barrel, the central water pipe and the spiral air inlet pipe are coaxially arranged.

Further, an opening is formed in the bottom of the heat exchange barrel, and a sealing plug is mounted on the opening.

Further, the liquid level height of the heat exchange liquid is 70-90% of the total height of the inner wall of the heat exchange barrel.

Furthermore, a heat insulation layer is arranged outside the heat exchange barrel.

Furthermore, the bottom of the heat exchange barrel is provided with a supporting leg.

Compared with the prior art, LNG waste heat utilization equipment have following advantage:

LNG waste heat utilization equipment, the flue gas gets into from the top of spiral intake pipe, along spiral intake pipe spiral downstream, carry out the heat exchange with heat exchange liquid in the motion process, discharge from the lower extreme opening part of spiral intake pipe at last, the formation bubble carries out the heat exchange with heat exchange liquid once more, greatly increased the contact time of flue gas with heat exchange liquid, the area of increase heat exchange, be more convenient for reduce the temperature of flue gas, dust or granule dissolve in heat exchange liquid simultaneously, avoid dust or granule to block follow-up pipeline, the moisture two tunnel carries out the heat transfer respectively, heat transfer area is big, the heat transfer is effectual.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is the utility model discloses LNG waste heat utilization equipment's overall structure schematic diagram.

Description of reference numerals:

1. a central water pipe; 2. a spiral air inlet pipe; 3. a heat exchange barrel; 4. a shell; 5. a first water inlet pipe; 6. a second water inlet pipe; 7. a water inlet main pipe; 8. a first water outlet pipe; 9. a second water outlet pipe; 10. a water outlet main pipe; 11. a heat exchange liquid; 12. an air outlet pipe; 13. an opening; 14. a heat insulation layer; 15. and (7) supporting legs.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

An LNG waste heat utilization device is shown in figure 1 and comprises a central water pipe 1, a spiral air inlet pipe 2, a heat exchange barrel 3 and a shell sleeve 4 which are coaxially arranged from inside to outside in sequence.

The upper end of the central water pipe 1 penetrates out of the upper end of the heat exchange barrel 3, and the lower end of the central water pipe 1 penetrates out of the lower end of the heat exchange barrel 3. The heat exchange barrel 3 is filled with heat exchange liquid 11, the heat exchange liquid 11 is water, and heat in the flue gas is firstly transferred to the heat exchange liquid 11.

A closed heating cavity is formed between the shell sleeve 4 and the heat exchange barrel 3, the bottom of the shell sleeve 4 is connected with a first water inlet pipe 5, the lower end of the central water pipe 1 is connected with a second water inlet pipe 6, and the first water inlet pipe 5 and the second water inlet pipe 6 are connected with a water inlet main pipe 7; the top of shell cover 4 is connected with first outlet pipe 8, the upper end of central water pipe 1 is connected with second outlet pipe 9, first outlet pipe 8 and second outlet pipe 9 are connected with outlet manifold 10.

The upper end of heat exchange bucket 3 is worn out to the upper end of spiral intake pipe 2, the lower extreme of spiral intake pipe 2 extends to the bottom of heat exchange bucket 3, and the flue gas of being convenient for is from the bottom upward movement of heat exchange bucket 3, and it is abundant to realize flue gas and the contact of heat exchange liquid 11 in the motion process. The flue gas gets into from the top of

spiral intake pipe

2, 2 spiral downstream along spiral intake pipe, carry out the heat exchange with heat exchange liquid 11 in the motion process, discharge from the lower extreme opening 13 department of spiral intake pipe 2 at last, the formation bubble carries out the heat exchange with heat exchange liquid 11 once more, greatly increased the contact time of flue gas with heat exchange liquid 11, increase the area of heat exchange, be more convenient for reduce the temperature of flue gas, dust or granule are dissolved in heat exchange liquid 11 simultaneously, avoid dust or granule to block follow-up pipeline. The upper end of the heat exchange barrel 3 is fixedly connected with an air outlet pipe 12, and the flue gas is discharged from the air outlet pipe 12.

An opening 13 is formed in the bottom of the heat exchange barrel 3, and a sealing plug is mounted on the opening 13 to replace and add the heat exchange liquid 11.

The liquid level height of the heat exchange liquid 11 is 70-90% of the total height of the inner wall of the heat exchange barrel 3.

The heat exchange barrel 3 is provided with a heat insulation layer 14 outside, and the heat insulation layer 14 reduces the loss of heat in the heat exchange barrel 3, saves energy and improves the energy utilization rate.

The bottom of the heat exchange barrel 3 is provided with a supporting leg 15 for supporting.

During the use, the flue gas gets into from the top of spiral intake pipe 2, along 2 spiral downstream of spiral intake pipe, carry out the heat exchange with heat exchange liquid 11 in the motion process, discharge from the lower extreme opening 13 department of spiral intake pipe 2 at last, it carries out the heat exchange with heat exchange liquid 11 once more to form the bubble, and simultaneously, dust and granule in the flue gas can mostly be dissolved in heat exchange liquid 11, final bubble come-up is more than heat exchange liquid 11's liquid level, discharge through outlet duct 12, regularly change heat exchange liquid 11.

The water flow needing to be heated enters the water inlet main pipe 7, part of the water flows into the first water inlet pipe 5 from the water inlet main pipe 7 and then enters the shell sleeve 4 to exchange heat with the heat exchange liquid 11, and finally is discharged to the water outlet main pipe 10 from the first water outlet pipe 8, the other part of the water flows into the second water inlet pipe 6 from the water inlet main pipe 7 and then enters the central water pipe 1 to exchange heat with the heat exchange liquid 11, and finally is discharged to the water outlet main pipe 10 from the second water outlet pipe 9, and the whole waste heat recovery process is completed. Two paths of water exchange heat respectively, so that the heat exchange area is large, and the heat exchange effect is good.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a LNG waste heat utilization equipment which characterized in that: comprises a central water pipe, a spiral air inlet pipe, a heat exchange barrel and a shell sleeve which are arranged from inside to outside in sequence, wherein the upper end of the central water pipe penetrates out of the upper end of the heat exchange barrel, the lower end of the central water pipe penetrates out of the lower end of the heat exchange barrel, a closed heating cavity is formed between the shell sleeve and the heat exchange barrel, the bottom of the shell sleeve is connected with a first water inlet pipe, the lower end of the central water pipe is connected with a second water inlet pipe, the first water inlet pipe and the second water inlet pipe are connected with a water inlet main pipe, the top of the shell sleeve is connected with a first water outlet pipe, the upper end of the central water pipe is connected with a second water outlet pipe, the first water outlet pipe and the second water outlet pipe are connected with a water outlet header pipe, the heat exchange barrel is filled with heat exchange liquid, the upper end of the spiral air inlet pipe penetrates out of the upper end of the heat exchange barrel, the lower end of the spiral air inlet pipe extends to the bottom of the heat exchange barrel, and the upper end of the heat exchange barrel is fixedly connected with an air outlet pipe.

2. The LNG waste heat utilization device of claim 1, wherein: the heat exchange barrel, the central water pipe and the spiral air inlet pipe are coaxially arranged.

3. The LNG waste heat utilization device of claim 1, wherein: the bottom of the heat exchange barrel is provided with an opening, and the opening is provided with a sealing plug.

4. The LNG waste heat utilization device of claim 1, wherein: the liquid level height of the heat exchange liquid is 70-90% of the total height of the inner wall of the heat exchange barrel.

5. The LNG waste heat utilization device of claim 1, wherein: and a heat insulation layer is arranged outside the heat exchange barrel.

6. The LNG waste heat utilization device of claim 1, wherein: the bottom of the heat exchange barrel is provided with supporting legs.