CN219473673U - Waste heat recovery device based on CEB heat pipe - Google Patents

Abstract

The utility model provides a waste heat recovery device based on CEB heat pipes, which is applied to an incineration system of VOCs, and comprises a heat pipe device and a steam collecting device; the heat pipe devices are distributed in a radial mode from the center to the outside, the hot end of the heat pipe device is positioned at the center, the cold end of the heat pipe device passes through the exhaust drum and is connected with one end of the steam collecting device, and the other end of the steam collecting device is connected with the external steam drum; the steam collecting device is of an upper-lower double-layer structure, steam collected by the upper layer is conveyed to the external steam drum through a pipeline and conveyed to the heat supply network system for cyclic utilization through the external steam drum, and water is supplemented by the external steam drum through a boiler water supply pipeline. Through the optimization cooperation between heat pipe device, collection vapour device and external steam pocket, solved traditional exhaust-heat boiler design huge, the flue gas resistance is big and the problem that the load is big, improved heat exchange efficiency has improved the energy utilization simultaneously.

Description

Waste heat recovery device based on CEB heat pipe

Technical Field

The utility model relates to a waste heat recovery device based on CEB heat pipes.

Background

VOCs are involved in the formation of ozone and secondary aerosols in the atmospheric environment, which have an important impact on regional atmospheric ozone pollution, PM2.5 pollution. In the treatment of VOCs waste gas, petrochemical enterprises have high waste gas emission concentration, and waste gas purification treatment is carried out by adopting methods such as condensation, absorption, combustion and the like. The VOCs combustion method is a method of converting combustible harmful components in exhaust gas into harmless or easily further processed and recovered substances by thermal oxidation.

The existing combustion method for treating VOCs gas faces the dilemma that fuel gas consumption is high, and high-temperature flue gas emission has heat radiation to the periphery. While some tank groups, docks require steam heating or purging due to the nature of the material. When CEB burns, the temperature can reach 1200 ℃, and the heat conduction is mainly concentrated on radiation heat transfer due to the overhigh temperature of flue gas. The utilization of CEB high-temperature flue gas to recycle byproduct steam for factories is a conventional means adopted at present, but the temperature of the traditionally used waste heat boiler for treating flue gas is generally 700-800 ℃, and the design volume is huge, the flue gas resistance is large, the load is large, and the heat exchange efficiency is low.

Disclosure of Invention

In order to solve the problems of huge design volume, high smoke resistance and high load of the existing waste heat boiler, the utility model provides a waste heat recovery device based on a CEB heat pipe, which comprises the following specific scheme:

the waste heat recovery device based on the CEB heat pipe is applied to an incineration system of VOCs and comprises a heat pipe device and a steam collecting device;

the heat pipe devices are distributed in a radial mode from the center to the outside, the hot end of the heat pipe device is positioned at the center, the cold end of the heat pipe device passes through the exhaust drum and is connected with one end of the steam collecting device, and the other end of the steam collecting device is connected with the external steam drum;

the steam collecting device is of an upper-lower double-layer structure, steam collected by the upper layer is conveyed to the external steam drum through a pipeline and conveyed to the heat supply network system for cyclic utilization through the external steam drum, and water is supplemented by the external steam drum through a boiler water supply pipeline.

Preferably, the heat pipe is a normal temperature heat pipe, and a fin type heat pipe is adopted.

Preferably, the external steam drum comprises an outer packing layer, an insulating layer and a refractory layer, wherein the outer packing layer adopts a steel plate, the insulating layer adopts an aluminum silicate fiber board, and the refractory material is a light refractory castable.

Preferably, the steam collecting device is provided with a safety valve, a water gauge and a pressure gauge.

Preferably, the external steam drum is provided with a continuous blow-off pipe, a dosing pipe and a steam pipe.

Preferably, the boiler feed water line is controlled by a PLC.

Preferably, the heat pipes are made of 304, and are arranged in layers on the CEB shell ring, so that the temperature of the flue gas and the resistance of the system can be adjusted by the heat pipes arranged in layers.

The beneficial effects are that:

(1) The utility model provides a waste heat recovery system based on CEB heat pipes, which comprises a waste heat recovery part and a waste heat guiding part, wherein the waste heat recovery part comprises heat pipe devices, the heat pipe devices are designed to be distributed in a central outward dispersed manner, the waste heat guiding part is connected with a steam collecting device, the steam collecting device meets the two-phase separation of steam and water, the top collects the steam, the bottom water returns to the heat pipe system, the liquid level is regulated by a PLC (programmable logic controller), a safety valve is arranged at the top, and the heat-containing steam collected by the steam collecting device is guided to a heat network system through the waste heat guiding device, so that the energy utilization rate is improved, and the system is energy-saving and environment-friendly.

(2) The utility model provides a waste heat recovery device based on a CEB heat pipe, wherein the heat pipe adopts a normal-temperature heat pipe, a working medium adopts water, natural circulation power of the water is utilized, the structure is simple, and the heat transfer efficiency is high. The heat pipes adopt a fin type structure and are arranged on the cylinder sections in a layered manner, so that the heat exchange requirement of reducing the temperature of the flue gas from 1200 ℃ to 200 ℃ is met, the high-temperature flue gas can be treated, and the heat exchange efficiency is high.

(3) The waste heat recovery device can generate low-pressure steam pressure, and the low-pressure steam can meet the requirements of heating or heat tracing in factories and has higher economic benefit.

(4) Through the optimization cooperation among the heat pipe device, the steam collecting device and the external steam drum, the problems of huge design volume, high flue gas resistance and high load of the traditional waste heat boiler are solved.

Drawings

Fig. 1 is a schematic structural diagram of a heat recovery device based on CEB heat pipes in an embodiment.

Symbol description:

1. an exhaust gas line; 2. a fuel gas line; 3. igniting the gas pipeline; 4. a combustion fan; 5. CEB shell ring; 6. a heat pipe device; 7. a steam collecting device; 8. a chimney; 9. an external steam drum; 10. a boiler feed water pipeline.

Detailed Description

The present utility model will be described in further detail below in conjunction with specific embodiments for the purpose of facilitating understanding by those skilled in the art, but it will be understood by those skilled in the art that the embodiments described below are some, but not all, embodiments of the present utility model and are intended to be illustrative of the present utility model and should not be construed as limiting the scope of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Examples:

fig. 1 is a schematic structural diagram of a waste heat recovery device based on CEB heat pipes, as shown in fig. 1, and the waste heat recovery device based on CEB heat pipes is applied to an incineration system of VOCs, and comprises a heat pipe device 6 and a steam collecting device 7;

the heat pipe devices 6 are distributed in a central outward radial mode, the hot end of each heat pipe device 6 is located at the center, the cold end of each heat pipe device passes through the exhaust pipe and is connected with one end of the steam collecting device 7, and the other end of the steam collecting device 7 is connected with the external steam drum 9;

the steam collecting device 7 is of an upper-lower double-layer structure, steam collected by the upper layer is conveyed to the external steam drum 9 through a pipeline by the steam collecting device 7 and conveyed to the heat supply network system for recycling through the external steam drum 9, and the external steam drum 9 is supplemented with water through the boiler water supply pipeline 10.

The heat pipe is a normal temperature heat pipe, adopts a fin type, and is made of 304.

The waste heat guiding device is an external steam drum 9 connected with the steam collecting device 7 through a pipeline, the external steam drum 9 provides liquid medium through a boiler water supply pipeline 10, and the boiler water supply pipeline 10 is controlled through a PLC.

The external steam drum 9 comprises an outer packing layer, an insulating layer and a refractory layer, wherein the outer packing layer adopts a steel plate, the insulating layer adopts an aluminum silicate fiber board, and the refractory material is a light refractory castable.

The incineration system comprises a CEB cylinder section 5, and ignition fuel gas, waste gas and fuel gas are introduced into the side surface of the CEB cylinder section 5; the top of the CEB cylinder section 5 is connected with a chimney 8, and the bottom of the CEB cylinder section 5 is connected with a combustion-supporting fan 4. Air is blown in through the combustion-supporting fan 4 to supplement air required during combustion, waste gas enters the CEB cylinder section 5 through the waste gas pipeline 1 and the fuel gas through the fuel gas pipeline 2 for combustion, and ignition fuel gas enters through the ignition gas pipeline 3.

The heat pipe device 6, the steam collecting device 7 and the external steam drum 9 are all of modularized design, and are convenient to check and maintain by means of CEB shell ring 5, CEB tower, device parts and arrangement, and the steam collecting device 7 is provided with a safety valve, a water level meter and a pressure meter; the external steam drum 9 is provided with a continuous blow-down pipe, a dosing pipe and a self-use steam pipe; the external steam drum 9 is provided with an operation platform and a connecting staircase in a frequently operated area, a monitoring area, a maintenance area, a door hole, a valve, an observation hole, a water level meter and a main steam safety valve area.

The working conditions are as follows:

(1) Treating VOCs waste gas to be treated by an incineration method, wherein a combustion area is in a CEB cylinder section 5;

(2) The high-temperature gas generated after combustion contacts the central hot end of the heat pipe device 6;

(3) The hot end of the heat pipe device 6 contacts the high-temperature gas to be treated, and the liquid medium in the heat pipe is gasified through the direct contact of the heat pipe, and the gasified gas flows into the cold end of the heat pipe device 6;

(4) The cold end of the heat pipe device 6 contacts the outer wall of the vapor collecting device 7, so that the liquid medium in the vapor collecting device 7 is overheated and boiled, and a large amount of vapor is generated;

(5) The steam is filled in the steam collecting device 7, moves to the top layer of the steam collecting device 7 under the action of self gravity, is guided out through the waste heat guiding part, is in a middle-low pressure high-temperature steam guiding form, and is used for industrial heat tracing or other common application scenes.

The waste heat recovery device based on the CEB heat pipe can generate low-pressure steam with the pressure of 0.6-0.8 MPa, the saturated steam temperature is higher than 160 ℃, the low-pressure steam can meet the requirements of heating or heat tracing in factories, and the like, so that the waste heat recovery device has economic value in practice; meanwhile, the temperature of the flue gas can be reduced from 1200 ℃ to 200 ℃, and the heat exchange efficiency is high.

Here, it should be noted that the description of the above technical solution is exemplary, and the present specification may be embodied in different forms and should not be construed as being limited to the technical solution set forth herein. Rather, these descriptions will be provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the utility model is limited only by the scope of the claims.

The shapes, dimensions, ratios, angles, and numbers disclosed for describing aspects of the present specification and claims are merely examples, and thus, the present specification and claims are not limited to the details shown. In the following description, a detailed description of related known functions or configurations will be omitted when it may be determined that the emphasis of the present specification and claims is unnecessarily obscured.

Where the terms "comprising," "having," and "including" are used in this specification, there may be additional or alternative parts unless the use is made, the terms used may generally be in the singular but may also mean the plural.

It should be noted that although the terms "first," "second," "top," "bottom," "one side," "another side," "one end," "the other end," etc. may be used and used in this specification to describe various components, these components and portions should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with top and bottom elements, under certain circumstances, also being interchangeable or convertible with one another; the components at one end and the other end may be the same or different in performance from each other.

In addition, when constituting the components, although not explicitly described, it is understood that a certain error region is necessarily included. In describing positional relationships, for example, when positional sequences are described as "on," "above," "below," and "next," unless words or terms such as "just" or "directly" are used, it is also possible to include cases where there is no contact or contact between them. If a first element is referred to as being "on" a second element, it does not mean that the first element must be located above the second element in the figures. The upper and lower portions of the component will change in response to changes in the angle and orientation of the view. Thus, in the drawings or in actual construction, if it is referred to that a first element is "on" a second element, it can comprise the case that the first element is "under" the second element and the case that the first element is "over" the second element. In describing the time relationship, unless "just" or "direct" is used, a case where there is no discontinuity between steps may be included in describing "after", "subsequent" and "preceding".

The foregoing is merely exemplary embodiments of the present utility model, and it should be noted that any changes and substitutions that would be easily recognized by those skilled in the art within the scope of the present utility model are intended to be covered by the present utility model, and the remaining details are not described in detail as prior art.

Claims (7)

1. The waste heat recovery device based on the CEB heat pipe is applied to the incineration system of VOCs, and is characterized by comprising a heat pipe device and a steam collecting device;

the heat pipe devices are distributed in a radial mode from the center to the outside, the hot end of the heat pipe device is positioned at the center, the cold end of the heat pipe device passes through the exhaust drum and is connected with one end of the steam collecting device, and the other end of the steam collecting device is connected with the external steam drum;

the steam collecting device is of an upper-lower double-layer structure, steam collected by the upper layer is conveyed to the external steam drum through a pipeline and conveyed to the heat supply network system for cyclic utilization through the external steam drum, and water is supplemented by the external steam drum through a boiler water supply pipeline.

2. The waste heat recovery device based on the CEB heat pipe as claimed in claim 1, wherein the heat pipe is a normal temperature heat pipe, and fin type heat pipe is adopted.

3. The waste heat recovery device based on the CEB heat pipe according to claim 1, wherein the external steam drum comprises an outer packing layer, an insulating layer and a refractory layer, the outer packing layer is made of steel plates, the insulating layer is made of aluminum silicate fiber plates, and the refractory material is made of light refractory castable.

4. The heat recovery device based on the CEB heat pipe according to claim 1, wherein the steam collecting device is provided with a safety valve, a water level gauge and a pressure gauge.

5. The heat recovery device based on the CEB heat pipe according to claim 1, wherein the external steam drum is provided with a continuous blow-down pipe, a dosing pipe and a steam pipe.

6. The CEB heat pipe-based waste heat recovery apparatus of claim 1, wherein the boiler feed water line is controlled by a PLC.

7. The waste heat recovery device based on the CEB heat pipe according to claim 2, wherein the heat pipes are arranged in a layered mode, and the heat pipes are made of 304.