CN219141545U

CN219141545U - Energy-saving condensation integrated waste heat recovery device

Info

Publication number: CN219141545U
Application number: CN202223426433.2U
Authority: CN
Inventors: 谢鹏; 徐旭平; 陈子涵
Original assignee: Hangzhou Chengyu Energy Saving And Environmental Protection Technology Co ltd
Current assignee: Hangzhou Chengyu Energy Saving And Environmental Protection Technology Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-06-06
Anticipated expiration: 2032-12-20

Abstract

The utility model discloses an energy-saving condensation integrated waste heat recovery device, which comprises a flue gas flow channel; the flue gas flow passage is characterized in that two ends of the flue gas flow passage are respectively connected with a flue gas inlet and a flue gas collecting box, and an energy-saving device assembly and a condenser assembly are arranged on the flue gas flow passage; the energy-saving device assembly is positioned between the condenser assembly and the smoke inlet; the energy-saving device assembly comprises a water inlet pipe, a spiral finned tube energy-saving device with one end connected with the water inlet pipe and a water outlet pipe connected with the other end of the spiral finned tube energy-saving device. According to the utility model, the flue gas of the boiler is introduced into the flue gas flow channel to be in contact with the energy-saving device assembly, the energy-saving device assembly and the heat of the flue gas are subjected to primary absorption and utilization, and then the energy-saving device assembly and the heat of the flue gas are subjected to secondary absorption with the warm water in the condenser group to recycle the heat of the flue gas for multiple times, so that the heat energy of the flue gas is recycled, the utilization rate of the heat energy of the flue gas is improved, the steam content in the flue gas is reduced, and the effect of flue gas whitening is achieved.

Description

Energy-saving condensation integrated waste heat recovery device

Technical Field

The utility model relates to the technical field of flue gas waste heat recovery of natural gas furnaces, in particular to an energy-saving condensation integrated waste heat recovery device.

Background

Waste heat refers to heat energy released in the production process and capable of being utilized. Mainly has high-temperature waste gas and the like, and waste heat utilization can generate steam through a waste heat boiler to drive a steam turbine to do mechanical work or generate power, and can also be used for heating or producing hot water. The existing waste heat recovery device adopts water flow with the same temperature to recover the heat of the flue gas, so that the heat recovery utilization rate is low, the heat loss is serious, and when the boiler steam is discharged into the air, white smoke plume is formed to generate visual pollution. Therefore, the utility model provides an energy-saving condensation integrated waste heat recovery device.

Disclosure of Invention

The utility model aims to provide an energy-saving condensation integrated waste heat recovery device, which adopts water flows with different temperatures to carry out cascade recovery on steam, thereby improving the recovery utilization rate of heat, recovering sensible heat and latent heat in flue gas, reducing the volume percentage of water vapor in the flue gas, and whitening the flue gas, so as to solve the problems that the existing waste heat recovery device in the background art adopts the water flows with the same temperature to recover the heat of the flue gas, the heat recovery utilization rate is low, serious heat loss is caused, and the white smoke plume is formed to generate visual pollution when boiler steam is discharged into the air.

The utility model aims to provide an energy-saving condensation integrated waste heat recovery device which comprises a flue gas flow passage; the flue gas flow passage is characterized in that two ends of the flue gas flow passage are respectively connected with a flue gas inlet and a flue gas collecting box, and an energy-saving device assembly and a condenser assembly are arranged on the flue gas flow passage; the energy-saving device assembly is positioned between the condenser assembly and the smoke inlet; the energy-saving device assembly comprises a water inlet pipe, a spiral finned tube energy-saving device with one end connected with the water inlet pipe and a water outlet pipe connected with the other end of the spiral finned tube energy-saving device.

Optionally, the water inlet pipe is positioned between the smoke inlet and the water outlet pipe; the distance between the water inlet pipe and the ground is greater than that between the water outlet pipe and the ground.

Optionally, the condenser group comprises a plurality of wave-shaped fin plate condensers, condensate liquid inlet pipes and condensate liquid outlet pipes which are arranged at two ends of the wave-shaped fin plate condensers.

Optionally, the condensate liquid inlet pipe and the condensate liquid outlet pipe are both connected with the outside.

Optionally, the condenser comprises a bottom plate, an end plate, a corrugated mesh plate arranged between the bottom plate and the end plate, heat exchange tubes arranged on the bottom plate and connected with the end plate and contacted with the corrugated mesh plate, and elbows for interconnecting the heat exchange tubes.

Optionally, condensed water outlets are formed in the bottom ends of the flue gas collecting box and the flue gas flow channel, and a flue gas flange is arranged at the top of the flue gas collecting box.

Compared with the prior art, the utility model provides an energy-saving condensation integrated waste heat recovery device, which has the following beneficial effects:

this energy-conserving condenser pipe integral type waste heat recovery device lets in the flue gas of boiler in the flue gas runner, with economizer subassembly contact, economizer subassembly carries out primary absorption with the heat of flue gas and utilizes, add warm water (or other technology cold water) in the condenser group again and carry out secondary (or many times) absorption to the heat in the flue gas, thereby carry out many times recycle to the flue gas heat, with condenser group divide into a plurality of modules, the flue gas side is established ties, with the condenser parallelly connected (with the condensate feed liquor pipe of condenser with same condensate be responsible for be connected) or connect alone (with the condensate feed liquor pipe of condenser with different condensate be responsible for be connected, and the temperature of every condensate feed liquor pipe is different), according to flue gas heat step change, make the recycle rate of flue gas heat higher, and condenser group condenses the vapor in the flue gas, thereby when retrieving the flue gas heat energy utilization rate, the vapor content in the flue gas has been reduced, play the effect of flue gas extinction.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic structural view of the economizer assembly of the present utility model;

FIG. 3 is a schematic view of the structure of the corrugated fin plate condenser of the present utility model;

FIG. 4 is a schematic diagram of a corrugated fin plate condenser of the present utility model with the corrugated mesh plate removed.

The marks in the figure are as follows: 1. a flue gas flow passage; 2. a smoke inlet; 3. a flue gas collection box; 31. a condensed water outlet; 32. a smoke exhausting flange; 4. an economizer assembly; 41. a water inlet pipe; 42. a spiral finned tube economizer; 43. a water outlet pipe 5 and a condenser group; 51. wave fin plate condenser; 511. a bottom plate; 512. an end plate; 513. a wave-shaped screen plate; 514. a heat exchange tube; 515 elbow; 52. a condensate liquid inlet pipe; 53. and a condensate liquid outlet pipe.

Detailed Description

The following detailed description is made with reference to the accompanying drawings and detailed description. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than those described herein, and those skilled in the art may readily devise many other varied forms and without departing from the spirit of the utility model, it is therefore not limited to the specific embodiments disclosed below.

In describing embodiments of the present utility model, it should be noted that the terms "first," "second," "third," etc. are used for clarity in describing the numbering of product components and do not represent any substantial distinction unless explicitly stated or defined otherwise. The directions of the upper, the lower, the left and the right are all the directions shown in the drawings. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those skilled in the art according to specific circumstances.

The energy-saving condensation integrated waste heat recovery device can be suitable for occasions such as boiler flue gas waste heat recovery and the like, and can be used for other similar application occasions, and the energy-saving condensation integrated waste heat recovery device is described in detail below.

Referring to fig. 1-4, there is shown a schematic structural diagram of an embodiment of an energy-saving condensing integrated waste heat recovery device of the present utility model. The energy-saving and condensation integrated waste heat recovery device comprises a flue gas flow passage 1; the two ends of the flue gas flow channel 1 are respectively connected with a flue gas inlet 2 and a flue gas collecting box 3, an economizer assembly 4 and a condenser assembly 5 are arranged on the flue gas flow channel 1, the economizer assembly 4 is positioned between the condenser assembly 5 and the flue gas inlet 2, the economizer assembly 4 comprises a water inlet pipe 41, a spiral fin tube economizer 42 with one end connected with the water inlet pipe 41, and a water outlet pipe 43 connected with the other end of the spiral fin tube economizer 42, and the spiral fin tube economizer 42 is made of ND steel or boiler steel; the flue gas flow channel 1 is formed by welding a plurality of steel plates; the energy-saving device can primarily absorb and utilize the heat of the flue gas through the arrangement of the energy-saving device assembly 4; through the setting of condenser group 5, can carry out secondary (or many times) absorption to the heat in the flue gas to carry out many times recycle to the heat, improve the rate of recovery to flue gas heat, reduce energy loss.

Referring to fig. 1-2, in the present utility model, a water inlet pipe 41 is located between a smoke inlet 2 and a water outlet 43, and the distance between the water inlet pipe 41 and the ground is greater than the distance between the water outlet 43 and the ground; the utility model is arranged between the smoke inlet 2 and the water outlet 43 through the water inlet pipe 41, so that the flow direction of the deoxidized water entering through the water inlet pipe 41 when entering the spiral fin tube energy-saving device 42 is the same as the flow direction of the smoke, the contact time of the deoxidized water and the smoke is prolonged, and the heat exchange effect of the deoxidized water and the smoke is improved.

Referring to fig. 1-4, in the utility model, a condenser set 5 consists of a plurality of wave-shaped fin plate condensers 51, condensate liquid inlet pipes 52 and condensate liquid outlet pipes 53 which are arranged at two ends of the wave-shaped fin plate condensers 51, namely, the condenser part is designed as a module, and a plurality of groups of heat exchange modules are arranged according to different systems to absorb heat of flue gas for a plurality of times, so that the heat utilization rate of the flue gas is improved; the condensate liquid inlet pipe 52 and the condensate liquid outlet pipe 53 are connected with the outside, and the corrugated fin plate condenser 51 is made of stainless steel (304, 316L,2205 and the like); according to the utility model, the condensate liquid inlet pipes 52 and the condensate liquid outlet pipes 53 are connected with the outside, so that each condensate liquid inlet pipe 52 is connected with the same main liquid inlet pipe outside, the condensers 51 are connected in parallel, secondary (or multiple) heat exchange is performed on the flue gas, and the temperature of the introduced water is gradually reduced from the temperature close to the energy-saving device assembly 4 to the temperature far away from the energy-saving device assembly 4 through connecting different pipes, so that the recycling rate of the heat of the flue gas is higher according to the heat energy gradient of the flue gas, the water vapor in the flue gas is condensed to form condensed water, the water vapor content in the flue gas is reduced, and the flue gas is whitened.

Referring to fig. 3 to 4, in the present utility model, a wave fin plate condenser 51 includes a bottom plate 511 and an end plate 512, a wave mesh plate 513 between the bottom plate 511 and the end plate 512, heat exchange tubes 514 installed on the bottom plate 511 to be connected to the end plate 512 and in contact with the wave mesh plate 513, and bends 515 for interconnecting the heat exchange tubes 514; wherein, the bottom ends of the flue gas collecting box 3 and the flue gas flow channel 1 are respectively provided with a condensed water outlet 31, and the top of the flue gas collecting box 3 is provided with a smoke discharging flange 32; according to the utility model, by arranging the waveform screen 513, compared with the screens of other condensers, the waveform screen 513 increases the contact area with the flue gas, increases the heat exchange effect with the flue gas, and has large contact area with the heat exchange tube 514, so that the heat exchange speed is improved, the heat exchange efficiency of the flue gas is improved, and the utilization rate of the heat of the flue gas is improved; the wave-shaped fin plate condenser 51 discharges condensed water formed by condensing vapor in the flue gas through the arrangement of the condensed water outlet 31; through the setting of the flange of discharging fume 32, through flange joint pipeline, simple to operate.

Referring to fig. 1-4, the working principle of the utility model is that firstly, flue gas enters a flue gas flow channel 1 from a flue gas inlet 2, deoxygenated water is introduced into a spiral fin tube energy-saving device 42 through a water inlet pipe 41, and contacts with the flue gas in the flue gas flow channel 1, and at the moment, the flue gas with high temperature is transferred with the spiral fin tube energy-saving device 42 for the first time, and the deoxygenated water absorbs and utilizes the heat of the flue gas for the first time; as the flue gas continuously flows into the flue gas flow channel 1, the flue gas moves to the flue gas collecting box 3, then contacts through a condenser set 5 consisting of a plurality of corrugated fin plate condensers 51, each condenser in the condenser set 5 is connected in parallel or independently, and the condensed liquid inlet pipe 52 is used for introducing the hot water (or other process cold water) into the corrugated fin plate condensers 51, so as to carry out heat exchange recovery on the flue gas for a plurality of times and condense the water vapor in the flue gas, thereby improving the recovery rate of the heat of the flue gas and reducing the content of the water vapor in the flue gas; finally, the flue gas is discharged through a smoke discharge pipe connected to a smoke discharge flange 32, and the condensed water is discharged through a condensed water outlet 31.

Claims

1. The energy-saving and condensation integrated waste heat recovery device comprises a flue gas flow passage (1); it is characterized in that two ends of the flue gas flow passage (1) are respectively connected with a flue gas inlet (2) and a flue gas collecting box (3), an energy-saving device assembly (4) and a condenser assembly (5) are arranged on the flue gas flow passage (1); the energy-saving device assembly (4) is positioned between the condenser assembly (5) and the smoke inlet (2); the energy-saving device assembly (4) comprises a water inlet pipe (41), a spiral fin tube energy-saving device (42) with one end connected with the water inlet pipe (41) and a water outlet pipe (43) connected with the other end of the spiral fin tube energy-saving device (42).

2. The energy-saving and condensing integrated waste heat recovery device according to claim 1, characterized in that the water inlet pipe (41) is located between the flue inlet (2) and the water outlet pipe (43); the distance between the water inlet pipe (41) and the ground is larger than that between the water outlet pipe (43) and the ground.

3. The energy-saving and condensation integrated waste heat recovery device according to claim 1, wherein the condenser group (5) consists of a plurality of wave-shaped fin plate condensers (51), condensate liquid inlet pipes (52) and condensate liquid outlet pipes (53) which are arranged at two ends of the wave-shaped fin plate condensers (51).

4. The energy-saving and condensing integrated waste heat recovery device according to claim 3, wherein the condensate liquid inlet pipe (52) and the condensate liquid outlet pipe (53) are connected with the outside.

5. An energy saving condensation integrated waste heat recovery device according to claim 3, wherein the wave fin plate condenser (51) comprises a bottom plate (511) and an end plate (512), a wave net plate (513) located between the bottom plate (511) and the end plate (512), heat exchange tubes (514) mounted on the bottom plate (511) and connected with the end plate (512) and contacted with the wave net plate (513), and bends (515) for interconnecting the heat exchange tubes (514).

6. The energy-saving and condensation integrated waste heat recovery device according to claim 1, wherein condensed water outlets (31) are formed in the bottom ends of the flue gas collection box (3) and the flue gas flow channel (1), and a smoke exhausting flange (32) is arranged at the top of the flue gas collection box (3).