CN-122015549-A - Vertical heat storage and exchange integrated module and device based on flue gas heat source

CN122015549ACN 122015549 ACN122015549 ACN 122015549ACN-122015549-A

Abstract

The invention belongs to the technical field of energy storage, and relates to a vertical heat storage and exchange integrated module and device based on a smoke heat source, wherein the module comprises a smoke heat exchange component, a heat absorption working medium heat exchange component and a heat storage component; the flue gas heat exchange component comprises a flue gas heat exchange tube, the heat absorption working medium heat exchange component comprises a heat absorption working medium heat exchange tube, the heat storage component comprises a heat storage medium, and the flue gas heat exchange tube and the heat absorption working medium heat exchange tube are immersed in the heat storage medium so as to realize indirect heat exchange and heat storage between flue gas and the heat absorption working medium through the heat storage medium. The heat storage and heat exchange functions are highly integrated in a single module, the flue gas heat exchange tube and the heat absorption working medium heat exchange tube are immersed and arranged in a heat storage medium, so that direct storage and release of flue gas heat are realized, the volume of equipment and initial investment are remarkably reduced, the heat storage medium can be naturally solidified when being deactivated, electric tracing is not needed to maintain fluidity, and the running cost is greatly reduced.

Inventors

ZHU MENG
WANG YI
WANG FANGMING
ZHOU TAO

Assignees

重庆赛迪热工环保工程技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (12)

1. The vertical heat storage and exchange integrated module based on the flue gas heat source is characterized by comprising a flue gas heat exchange component, a heat absorption working medium heat exchange component and a heat storage component; The flue gas heat exchange component comprises a flue gas heat exchange tube; The heat-absorbing working medium heat exchange component comprises a heat-absorbing working medium heat exchange tube; the heat storage component comprises a heat storage medium; The flue gas heat exchange tube and the heat absorption working medium heat exchange tube are immersed in the heat storage medium, so that indirect heat exchange and heat storage between flue gas and the heat absorption working medium are realized through the heat storage medium.
2. The vertical heat storage and exchange integrated module based on a flue gas heat source according to claim 1, wherein the flue gas heat exchange component further comprises an inlet flue, an outlet flue, an ash storage bin, a flue ash storage bin, an ash discharge plate, an overhaul ash removal port and a wear-resistant heat insulation sealing assembly; the inlet flue is located above the flue gas heat exchange tube and is communicated with the ash storage bin, the flue gas heat exchange tube and the flue ash storage bin, the outlet flue is located below the flue gas heat exchange tube and is communicated with the flue ash storage bin, the ash storage bin is located below the inlet flue, the ash discharge plate is arranged at the bottom of the inlet flue and forms an inclination angle of 0-60 degrees with the horizontal plane so as to promote ash deposition to drop to Chu Huicang, the overhaul ash removal opening is arranged in the ash storage bin and the flue ash storage bin, and the wear-resisting heat-insulating sealing component is arranged at the top of the flue gas heat exchange tube.
3. The vertical heat storage and exchange integrated module based on a flue gas heat source according to claim 2, wherein the flue gas heat exchange component comprises a first inlet flue, a second inlet flue, a first outlet flue, a second outlet flue, a first ash storage bin, a second ash storage bin, a first flue ash storage bin, a second flue ash storage bin, a first flue gas heat exchange tube and a second flue gas heat exchange tube; The first inlet flue is communicated with the first ash storage bin, the first flue gas heat exchange tube, the first flue ash storage bin and the first outlet flue, and the second inlet flue is communicated with the second ash storage bin, the second flue gas heat exchange tube, the second flue ash storage bin and the second outlet flue; The first flue gas heat exchange tube and the second flue gas heat exchange tube are respectively positioned at two sides of the heat absorption working medium heat exchange tube.
4. A flue gas heat source based vertical heat storage and exchange integrated module according to any one of claims 1 to 3, wherein the wear-resistant heat insulation sealing assembly comprises a cone head and an outer ring and an inner ring fixedly connected to the outside and the inside of the cone head; The cone head is arranged at the top of the flue gas heat exchange tube and is communicated with the flue gas heat exchange tube, the outer ring is attached to the outer side of the top seal to block dust from entering the heat storage medium, and the inner ring is inserted into the inner wall of the flue gas heat exchange tube and has an insertion depth lower than the liquid level of the heat storage medium; The wear-resistant heat-insulating sealing component is made of quartz, corundum or ceramic materials.
5. A vertical heat storage and exchange integrated module based on a flue gas heat source according to any one of claims 1 to 3, wherein the flue gas heat exchange tubes are vertical straight tubes, the tube diameter is equal to or larger than 20mm, the flue gas heat exchange tubes are arranged on two sides of the heat absorption working medium heat exchange tubes, the number of tube rows of each side of the flue gas heat exchange tubes in the transverse direction is equal to or larger than 2, the number of tube rows in the longitudinal direction is equal to or larger than 2, and the tube bundles are arranged in a parallel or staggered manner.
6. A smoke heat source-based vertical heat storage and exchange integrated module according to any one of claims 1 to 3, wherein the heat absorbing working medium heat exchange component further comprises a heat absorbing working medium inlet pipeline, a heat absorbing working medium inlet header, a heat absorbing working medium outlet header and a heat absorbing working medium outlet pipeline; the heat-absorbing working medium inlet pipeline, the heat-absorbing working medium inlet header, the heat-absorbing working medium heat exchange tube, the heat-absorbing working medium outlet header and the heat-absorbing working medium outlet pipeline are sequentially communicated from bottom to top; the heat-absorbing working medium heat exchange tube is one of a vertical straight tube, a coiled tube, a spiral tube or a fin tube, the tube diameter is more than or equal to 10mm, the number of transverse tube rows is more than or equal to 1, the number of longitudinal tube rows is more than or equal to 1, and the tube bundles are arranged in a parallel or staggered mode.
7. A vertical heat storage and exchange integrated module based on a flue gas heat source according to any one of claims 1 to 3, wherein the heat storage component further comprises a heat storage medium region, an annular seal and a separator; The smoke heat exchange tube and the heat absorption working medium heat exchange tube are welded and sealed at the junction of the bottom of the heat storage medium area, and the junction of the top of the heat storage medium area is sealed in an annular dynamic manner so as to allow free thermal expansion.
8. The flue gas heat source based vertical heat storage and exchange integrated module of claim 7, wherein the partition comprises at least two vertical partitions and a plurality of horizontal partitions; the vertical partition plates are positioned at two sides of the heat absorption working medium heat exchange tube, and communication channels are reserved at the top and the bottom of the vertical partition plates; the horizontal partition plates are respectively arranged in the heat storage medium subareas where the first flue gas heat exchange pipe and the second flue gas heat exchange pipe are located, the number of the horizontal partition plates of each side subarea is more than or equal to 1, and the adjacent horizontal partition plates are arranged in a left-right staggered mode so as to form a roundabout flow channel of the heat storage medium from bottom to top.
9. The flue gas heat source-based vertical heat storage and exchange integrated module according to claim 1, wherein an insulating layer is circumferentially arranged on the outer side of the vertical heat storage and exchange integrated module.
10. A vertical heat storage and exchange integrated device based on a flue gas heat source, which is characterized by comprising a plurality of vertical heat storage and exchange integrated modules according to any one of claims 1 to 9; The vertical heat storage and exchange integrated modules form heat storage and exchange units in a parallel, serial or serial-parallel combination mode, and the heat storage and exchange units form a heat storage and exchange device in a parallel, serial or serial-parallel combination mode.
11. The integrated vertical heat storage and exchange device based on a flue gas heat source according to claim 10, wherein the heat storage and exchange units are closely arranged through the side surface with the largest area, the inlet of the flue gas heat exchange tube is communicated with the inlet flue header, the outlet of the flue gas heat exchange tube is communicated with the outlet flue header, the inlet of the heat absorption working medium heat exchange tube is communicated with the heat absorption working medium inlet header, and the outlet of the heat absorption working medium heat exchange tube is communicated with the heat absorption working medium outlet header.
12. The smoke heat source-based vertical heat storage and exchange integrated device according to claim 10, wherein the number of the vertical heat storage and exchange integrated modules in the heat storage and exchange units is more than or equal to 2, and the number of the heat storage and exchange units in the heat storage and exchange device is more than or equal to 1.

Description

Vertical heat storage and exchange integrated module and device based on flue gas heat source Technical Field The invention belongs to the technical field of energy storage, and relates to a vertical heat storage and exchange integrated module and device based on a smoke heat source. Background A great deal of flue gas heat energy exists in industrial scenes such as smelting, electric power, chemical industry and the like, and how to efficiently, economically and stably utilize the flue gas heat energy is an important point of attention in various industries. The heat storage technology can store energy in high grade and release the energy when needed, and is a potential scheme for solving the above requirements. The flue gas in a smelting scene is high in dust content and has volatility, for example, a module-based heat storage type flue gas waste heat power generation system for smelting and a control method thereof are disclosed, wherein a flue gas heat storage device can be used for storing the waste heat of the dust-containing flue gas in the volatility smelting, and saturated steam is used as superheated steam when energy is released, so that the function of a steam heat accumulator in the original system is partially replaced, and meanwhile, the efficiency is improved. In the power scene, power generation peak shaving is usually required, and adverse effects are caused to stable combustion, system efficiency, heat supply load and the like of a boiler by low-load operation, for example, a three-dimensional structure of a flue gas fused salt heat exchange system driven by flue gas of a boiler with the patent application number of CN202411115306.1 and a control method are provided, and the flue gas-fused salt heat storage device is utilized to store heat energy of the flue gas of the boiler during deep peak shaving, and release energy to steam to push a steam turbine during peak shaving so as to quickly promote power generation output. However, the heat source of the heat storage equipment in the prior art is mostly steam or electric heat source, for example, a heat exchange device for heating molten salt by high-temperature steam in the patent application number CN202411643899.9 comprises a first heat exchanger and a second heat exchanger, wherein a first pipe side steam outlet of the first heat exchanger is communicated with a second pipe side steam inlet of the second heat exchanger, a first shell side molten salt outlet of the first heat exchanger is communicated with a second shell side molten salt inlet of the second heat exchanger, steam in the first heat exchanger is the same as the flow direction of the molten salt, steam in the second heat exchanger is opposite to the flow direction of the molten salt, a heat storage device for heat and power cogeneration in the patent application number CN202121420734.7 comprises a columnar tank body, a heat storage medium, a plurality of porous partition plates arranged in the columnar tank body, a plurality of upright posts for supporting the porous partition plates, an upper flow collecting and distributing device and a lower flow collecting and distributing device, the porous partition plates are arranged in parallel and divide the interior of the columnar tank body into three layers of spaces, the height of the heat storage medium in each layer space is respectively greater than the upper layer space and the lower layer space, the upper layer space and the lower layer space is connected to the upper end of the lower layer collecting and the lower layer collecting device is connected to the upper end of the lower layer collecting device. If the technical scheme of converting the heat energy of the flue gas into the steam heat energy/electric energy and then storing the heat is adopted, the energy conversion efficiency is lower compared with that of directly storing the heat energy of the flue gas, and if the heat is directly stored by adopting a flue gas heat source, how to solve the problems of deposition of flue gas fly ash, poor heat exchange, large volume, high cost, short service life and the like is the difficulty of the conventional flue gas heat source heat storage equipment. Disclosure of Invention In view of the above, the invention aims to provide a vertical heat storage and exchange integrated module and device based on a flue gas heat source, so as to solve the problem of high-efficiency and stable energy storage of flue gas heat energy. In order to achieve the above purpose, the present invention provides the following technical solutions: a vertical heat storage and exchange integrated module based on a smoke heat source comprises a smoke heat exchange component, a heat absorption working medium heat exchange component and a heat storage component; The flue gas heat exchange component comprises a flue gas heat exchange tube; The heat-absorbing working medium heat exchange component comprises a heat-absorbing working medium heat exchange tub