CN211232825U - Organic Rankine cycle waste heat recovery heat exchanger - Google Patents
Organic Rankine cycle waste heat recovery heat exchanger Download PDFInfo
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- CN211232825U CN211232825U CN201921990618.1U CN201921990618U CN211232825U CN 211232825 U CN211232825 U CN 211232825U CN 201921990618 U CN201921990618 U CN 201921990618U CN 211232825 U CN211232825 U CN 211232825U
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- heat exchanger
- deaerator
- economizer
- heat recovery
- exchanger body
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Abstract
An organic Rankine cycle waste heat recovery heat exchanger belongs to the technical field of cement kiln waste heat recovery, and comprises a heat exchanger body, a heat exchange surface, a deaerator, a circulating water pump, a conveying water pump and an expander power generation system, wherein the heat exchange surface comprises an economizer and an evaporator, tube banks are arranged in the economizer and the evaporator, the outlet end of each tube bank of the economizer is connected with the inlet end of the deaerator through a temperature regulating valve, the deaerator and the evaporator are connected through two circulating water pumps to form deaerating internal circulation, the outlet end of the deaerator is connected with the water inlet of the expander power generation system through the conveying water pump, the water outlet of the expander power generation system is connected with the tube banks of the economizer, the organic Rankine cycle waste heat recovery heat exchanger is suitable for waste heat recovery of high-temperature waste gas, and the risk of cycle stop caused by vaporization of the heat exchange surface is prevented, and the energy recycling is realized, the waste heat recovery efficiency is high, the waste heat recovery cost is low, and the safety is high.
Description
Technical Field
The utility model relates to a cement kiln waste heat recovery technical field especially relates to an organic rankine cycle waste heat recovery heat exchanger.
Background
Waste heat power generation is an effective means for utilizing waste heat of a medium-low temperature heat source, the waste heat power generation circulation can be divided into 3 types according to different flows: water vapor rankine cycle (abbreviated as SRC), organic working medium rankine cycle (abbreviated as ORC), and kalina cycle (abbreviated as KC). At present, a cement kiln waste heat power generation system mainly adopts water vapor Rankine cycle (SRC for short), the cost of the recovery of the rest heat is low, when the temperature of waste gas is lower than 300 ℃, the heat recovery efficiency of the SRC technology is low, and the ORC system has higher technical advantages, but the application performance of the ORC system in a cement factory is less at present, although individual factories have application, organic oil is adopted to transfer heat, once the organic oil heat exchanger leaks, the influence on the safe production of cement is larger, the cost of the organic oil is higher, customers feel daunting, the popularization difficulty is higher, when a high-pressure water heat exchanger is adopted, when the temperature of the waste gas fluctuates upwards, water in a pipe bank is vaporized when encountering the waste gas with high heat, so that a pipe bank pipeline causes steam plug, and the risk of circulation stop is caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an organic rankine cycle waste heat recovery heat exchanger, the commonality that has mainly solved current organic rankine cycle waste heat recovery heat exchanger is poor with the problem that waste heat recovery is with high costs, aim at, can synthesize the advantage of water vapor rankine cycle and organic working medium rankine cycle, design an organic rankine cycle waste heat recovery heat exchanger, be applicable to the waste heat recovery of high temperature waste gas, moreover waste heat recovery efficiency is high, waste heat recovery is with low costs and the security is high.
In order to achieve the above object, the present invention provides a technical solution for solving the technical problem: organic rankine cycle waste heat recovery heat exchanger, including heat exchanger body, heat-transfer surface, oxygen-eliminating device, circulating water pump, conveying water pump and expander power generation system, the heat-transfer surface is including setting up economizer and the evaporimeter at the heat exchanger body, all be provided with the bank of tubes in economizer and the evaporimeter, the exit end of economizer bank of tubes pass through temperature regulating valve with the entry end of oxygen-eliminating device links to each other, link to each other through two circulating water pumps between oxygen-eliminating device and the evaporimeter and form the deoxidization inner loop, the exit end of oxygen-eliminating device links to each other through conveying water pump and expander power generation system's water inlet, expander power generation system's delivery port with the economizer bank of tubes links to each other.
Further, the heat exchanger body sets up to horizontal heat exchanger, both ends set up waste gas entry and exhaust outlet respectively about the heat exchanger body, the bottom of heat exchanger body sets up the dust export, this internal evaporimeter and the economizer of setting up from left to right of heat exchanger.
Furthermore, two dust outlets are arranged at the bottom end of the heat exchanger body and connected with a cover plate of the chain conveyor.
Further, the deaerator is arranged at the top of the heat exchanger body, and the circulating water pump and the conveying water pump are arranged at the bottom of the heat exchanger body.
Further, a pressure control valve is arranged on the deaerator.
The utility model has the advantages that:
the utility model discloses a waste gas waste heat of cement kiln head, kiln tail is retrieved to the heat transfer surface, waste gas is in the in-process through the heat exchanger body, water is pumped into the oxygen-eliminating device through the water pump by the economizer in the heat transfer surface, when the temperature of economizer export is higher, the inside vaporization that takes place of oxygen-eliminating device, the supplementary oxygen that removes in the circulating water of vaporization steam heatable make-up water, then in partial circulating water reentrant forms the deoxidization inner loop by oxygen-eliminating device, evaporimeter and two circulating water pump links to each other, continuously provide the heat for the oxygen-eliminating device, further remove the oxygen in the circulating water, avoid oxygen corrosion heat exchanger body and evaporimeter; the water in the heat exchange surface is subjected to high-temperature waste gas, the risk that a steam plug is generated in the economizer to cause the stop of a water circulation system is effectively avoided; the hot water flowing out of the deaerator is conveyed to the expander power generation system through the conveying water pump, heat is transferred to the organic working medium, the organic working medium expands to push the expander to generate power, the cooled hot water returns to the heat exchange surface to absorb heat, a closed circulation system is formed, and the utilization rate of energy is improved.
Drawings
The contents of the various figures of the specification and the labels in the figures are briefly described as follows:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic block diagram of the waste heat recovery of the present invention;
the labels in the above figures are: 1. the heat exchanger comprises a heat exchanger body, 11 parts of a waste gas inlet, 12 parts of a waste gas outlet, 13 parts of a dust outlet, 2 parts of a heat exchange surface, 21 parts of an economizer, 22 parts of an evaporator, 3 parts of a deaerator, 4 parts of a circulating water pump, 5 parts of a conveying water pump and 6 parts of a chain conveyor.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
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; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model discloses specific embodiment does: as shown in fig. 1 and fig. 2, an organic rankine cycle waste heat recovery heat exchanger comprises a heat exchanger body 1, a heat exchange surface 2, a deaerator 3, a circulating water pump 4, a water delivery pump 5 and an expander power generation system, wherein the heat exchange surface 2 comprises an economizer 21 and an evaporator 22 which are arranged in the heat exchanger body 1, tube banks are arranged in the economizer 21 and the evaporator 22, outlet ends of the economizer tube banks are connected with inlet ends of the deaerator 3 through temperature regulating valves, the temperature regulating valves can be set to be pneumatic regulating valves which are existing regulating valves, compressed air is used as a power source, a cylinder is used as an actuator, a valve is driven by accessories such as an electric valve positioner, a converter, an electromagnetic valve and a position-keeping valve, so as to realize switching value or proportional regulation, and the regulation of flow parameters of a pipeline medium is completed by receiving control signals of an industrial automatic control system, the temperature regulating valve has the characteristics of simple control, quick response and intrinsic safety, and no additional explosion-proof measure is needed, and particularly, the pneumatic film type sleeve guide type regulating valve with the model number of 501G-5227LADN can be used. The deaerator 3 and the evaporator 22 are connected through the two circulating water pumps 4 to form deaerating internal circulation, the outlet end of the deaerator 3 is connected with the water inlet of the expansion machine power generation system through the conveying water pump 5, and the water outlet of the expansion machine power generation system is connected with the coal economizer pipe bank. The waste heat recovery principle of the waste heat recovery system is as follows: in the process that waste gas at the head and the tail of the kiln passes through the heat exchanger body 1, water is pumped into the deaerator 3 through the water pump by the economizer 21, when the temperature of the outlet of the economizer 21 is high, the inside of the deaerator 3 is vaporized, vaporized steam can heat circulating water to assist in removing the circulating water and supplementing oxygen in the water, then partial circulating water enters the deaerator 3, the evaporator 22 and the two circulating water pumps 4 to be connected to form deaerated internal circulation, saturated water in the deaerator 3 enters the evaporator 22 to be further heated after passing through the circulating water pumps 4, and then returns to the deaerator 3 to continuously supply heat to the deaerator 3, so that the oxygen in the circulating water and the supplementing water is effectively reduced, and the heat exchanger body 1 and the evaporator 22 are prevented from being corroded by the oxygen; conveying water pump 5 water is got from the deoxidization water tank in the oxygen-eliminating device 3, the inside pressure along with the temperature automatically regulated deoxidization water tank of deoxidization water tank, ensure that 3 inside saturation water that are all the time of oxygen-eliminating device, set up temperature regulating valve between oxygen-eliminating device 3 and the economizer 21, can be along with economizer 21 export temperature, the automatically regulated aperture, when economizer 21 export temperature is lower, the export flow that temperature regulating valve steerable economizer 21 becomes little, therefore can effectively avoid when the water in the heat-transfer surface 2 meets high temperature waste gas, produce the vaporization and the vapor lock in economizer 21 is inside, cause the risk that water circulation system stops. As shown in fig. 2, after the deoxidization treatment of the deoxidization internal circulation, saturated hot water flowing out of the deoxidization device 3 is conveyed to the expander power generation system through the conveying water pump 5, heat is transferred to the organic working medium, the organic working medium expands to push the expander to generate power, and the cooled water flowing out of the water outlet of the expander power generation system returns to the heat exchange surface to continuously absorb heat, so that a closed circulation system is formed, and the utilization rate of energy is improved.
Specifically, as shown in fig. 1, the heat exchanger body 1 is a horizontal heat exchanger, the heat exchange surface 2 adopts forced circulation, the left end and the right end of the heat exchanger body 1 are respectively provided with a waste gas inlet 11 and a waste gas outlet 12, the waste gas inlet 11 and the waste gas outlet 12 are respectively connected with a blower and an exhaust fan through air pipes, the attachment amount of dust can be reduced by the horizontal heat exchanger, the bottom end of the heat exchanger body 1 is provided with a dust outlet 13, the dust can fall down due to gravity and flows out from the dust outlet 13, and the horizontal length of the horizontal heat exchanger is long, so that the dust can be fully settled and the attachment amount of dust on the inner wall of the heat exchanger body 1 can be reduced, the bottom end of the heat exchanger body 1 is provided with two dust outlets 13, and the dust outlets 13 are connected with the cover plate of the chain conveyor 6, so that the dust flowing, the cleaning effect of the heat exchanger body 1 is better, the evaporator 22 and the economizer 21 are arranged in the heat exchanger body 1 from left to right, the flowing direction of waste gas is opposite to the waste heat recovery direction of the heat exchange surface 2, and the waste heat of the waste gas can be fully absorbed. Certainly, this heat exchanger body 1 also sets up to vertical heat exchanger, makes evaporimeter 22 can the natural circulation, need not the illusion water pump 5 and carries out forced circulation, has saved the electric energy, and the top of this heat exchanger body 1 sets up waste gas inlet, and its bottom sets up the exhaust outlet, sets up evaporimeter 22 and economizer 21 from the top down in the heat exchanger body 1. Wherein, 1 top of heat exchanger body sets up oxygen-eliminating device 3, and 1 bottom of heat exchanger body sets up circulating water pump 4 and delivery water pump 5.
In addition, the deaerator 3 is provided with a pressure control valve, so that the pressure in the deaerator 3 can be controlled, the temperature of saturated water can be effectively controlled, and the influence of overhigh or overlow water temperature on organic working media in the expansion machine is prevented.
In conclusion, the organic Rankine cycle waste heat recovery heat exchanger is suitable for waste heat recovery of high-temperature waste gas, prevents the risk of cycle stop caused by vaporization of a heat exchange surface, realizes energy recycling, and is high in waste heat recovery efficiency, low in waste heat recovery cost and high in safety.
The foregoing is merely illustrative of some of the principles of the present invention and the description is not intended to limit the invention to the specific constructions and applications shown, so that all modifications and equivalents that may be utilized are within the scope of the invention.
Claims (5)
1. An organic Rankine cycle waste heat recovery heat exchanger is characterized by comprising a heat exchanger body (1), a heat exchange surface (2), a deaerator (3), a circulating water pump (4), a conveying water pump (5) and an expander power generation system, the heat exchange surface (2) comprises a coal economizer (21) and an evaporator (22) which are arranged in the heat exchanger body (1), the economizer (21) and the evaporator (22) are both internally provided with a tube bank, the outlet end of the economizer tube bank is connected with the inlet end of the deaerator (3) through a temperature regulating valve, the deaerator (3) and the evaporator (22) are connected through two circulating water pumps (4) to form deaerating internal circulation, the outlet end of the deaerator (3) is connected with the water inlet of the expansion machine power generation system through a conveying water pump (5), and the water outlet of the expansion machine power generation system is connected with the economizer pipe bank.
2. The organic Rankine cycle waste heat recovery heat exchanger according to claim 1, wherein the heat exchanger body (1) is a horizontal heat exchanger, the waste gas inlet (11) and the waste gas outlet (12) are respectively arranged at the left end and the right end of the heat exchanger body (1), the dust outlet (13) is arranged at the bottom end of the heat exchanger body (1), and the evaporator (22) and the economizer (21) are arranged in the heat exchanger body (1) from left to right.
3. The orc waste heat recovery heat exchanger according to claim 1, wherein the bottom end of the heat exchanger body (1) is provided with two dust outlets (13), and the dust outlets (13) are connected with the cover plate of the chain conveyor (6).
4. The organic Rankine cycle waste heat recovery heat exchanger according to any one of claims 1 to 3, wherein the deaerator (3) is arranged at the top of the heat exchanger body (1), and the circulating water pump (4) and the conveying water pump (5) are arranged at the bottom of the heat exchanger body (1).
5. The orc heat recovery exchanger according to claim 4, wherein the deaerator (3) is provided with a pressure control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921990618.1U CN211232825U (en) | 2019-11-18 | 2019-11-18 | Organic Rankine cycle waste heat recovery heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921990618.1U CN211232825U (en) | 2019-11-18 | 2019-11-18 | Organic Rankine cycle waste heat recovery heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN211232825U true CN211232825U (en) | 2020-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201921990618.1U Active CN211232825U (en) | 2019-11-18 | 2019-11-18 | Organic Rankine cycle waste heat recovery heat exchanger |
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| CN (1) | CN211232825U (en) |
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- 2019-11-18 CN CN201921990618.1U patent/CN211232825U/en active Active
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