CN211953785U - Waste heat cascade utilization's hot-water heating system based on gas internal-combustion engine generating set - Google Patents
Waste heat cascade utilization's hot-water heating system based on gas internal-combustion engine generating set Download PDFInfo
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- CN211953785U CN211953785U CN202020457005.8U CN202020457005U CN211953785U CN 211953785 U CN211953785 U CN 211953785U CN 202020457005 U CN202020457005 U CN 202020457005U CN 211953785 U CN211953785 U CN 211953785U
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Abstract
The utility model provides a hot water system based on gas internal-combustion engine generating set's waste heat cascade utilization comprises first heat exchanger 1, second heat exchanger 2, third heat exchanger 3, first hot water heat accumulation jar 4, second hot water heat accumulation jar 5, hot water buffer tank 6, internal circulation pump 7, external circulation pump 8, first three-way valve 9, second three-way valve 10, running water moisturizing pipe 11, the running water pipeline 12 and the pipeline and the ordinary valve of adjusting temperature. The utility model discloses a tertiary heat exchanger establishes ties gas internal-combustion engine generating set's well warm water, high temperature water and flue gas waste heat or other heat source hot water, has solved the utilization problem of gas internal-combustion engine well warm water, high temperature water, flue gas waste heat betterly, carries out the step utilization to the heat, has improved gas internal-combustion engine's energy comprehensive utilization efficiency to about 80-90% to better solution gas internal-combustion engine produce in succession with the hydrothermal problem of being interrupted the use of life.
Description
Technical Field
The utility model relates to a hot water system, specific theory relate to a hot water system based on gas internal-combustion engine generating set's waste heat cascade utilization.
Background
In recent years, with the increasing application of distributed gas energy projects, people pay more and more attention to how to improve the comprehensive energy utilization efficiency of gas internal combustion engines. Gas (such as natural gas, coal gas, biogas, coal bed gas and the like) is combusted in a combustion chamber of the gas internal combustion engine to do work and generate electricity (the generating efficiency is 30-45%), and most of heat (45-60%) is discharged in the form of flue gas waste heat, high-temperature water waste heat and medium-temperature water waste heat. The reasonable utilization of the residual heat is an important means for improving the comprehensive utilization efficiency of the energy of the gas internal combustion engine.
The medium temperature water of the gas internal combustion engine has the outlet water temperature of about 45-60 ℃, the return water temperature of about 40-50 ℃, the energy grade is lower, and the medium temperature water accounts for about 5-10% of the total heat input by the fuel; the outlet water temperature of the high-temperature water is about 85-95 ℃, the return water temperature is about 80-85 ℃, the energy grade is slightly high, and the heat of the high-temperature water (such as cylinder sleeve water) accounts for about 20-30% of the total heat input by the fuel. The smoke temperature is about 300-500 ℃, the energy grade is higher, and the hot water with the temperature above 90 ℃ can be generated. The waste heat utilization efficiency of medium-temperature water, high-temperature water and flue gas is improved as much as possible, and the comprehensive energy utilization efficiency of the whole fuel gas distributed energy project can be obviously improved.
At present, in the aspect of waste heat utilization of a gas internal combustion engine, the general method for utilizing the waste heat of high-temperature flue gas comprises two methods: one is to introduce the flue gas into a lithium bromide cold and hot water unit to produce cold water for air conditioner and hot water for heating; the other is to generate hot water or steam by a waste heat boiler. The waste heat utilization of the medium-temperature water and the high-temperature water has two modes: one is to introduce medium-temperature water and high-temperature water into a lithium bromide cold and hot water unit to generate cold water for air conditioner and hot water for heating; the other is to use a positive displacement heat exchanger to heat cold water at normal temperature to hot water at a higher temperature.
SUMMERY OF THE UTILITY MODEL
This is in order to solve above-mentioned technical problem, the utility model provides a hot water system based on gas internal-combustion engine generating set's waste heat cascade utilization, high-temperature water, medium temperature water and the flue gas of recycle internal-combustion engine generating set as far as produce hot water, can be used for life hot water, also can be used for other production hot water, play energy saving and consumption reduction's purpose.
In order to realize the above object of the utility model, the utility model provides a hot water system based on gas internal-combustion engine generating set's waste heat step utilization, its characterized in that: the heat pump water heater comprises a first heat exchanger, a second heat exchanger, a third heat exchanger, a first hot water heat storage tank, a second hot water heat storage tank and a hot water buffer tank, wherein a tap water replenishing pipe is arranged at the bottom of the first hot water heat storage tank, an upper hot water outlet of the first hot water heat storage tank is connected with a bottom water inlet pipeline of the second hot water heat storage tank, an upper hot water outlet of the second hot water heat storage tank is connected with a bottom water inlet pipeline of the hot water buffer tank, a hot side inlet of the first heat exchanger is connected with a medium temperature water pipeline of a gas internal combustion engine, a cold side inlet of the first heat exchanger is connected with a bottom water outlet pipeline of the first hot water heat storage tank, a hot side outlet of the first heat exchanger is connected with a top hot water inlet pipeline of the first hot water heat storage tank, a hot side inlet of the second heat exchanger is connected with a high temperature water pipeline of the gas internal combustion engine, and a cold side inlet of, the hot side outlet of the second heat exchanger is connected with a hot water inlet pipeline at the top of the second hot water heat storage tank, hot water generated after heat exchange with flue gas of a gas combustion engine or hot water supplied by other heat sources enters a hot side water inlet pipeline of the third heat exchanger, a cold side inlet of the third heat exchanger is connected with a bottom water outlet pipeline of the hot water buffer tank, the hot side outlet of the third heat exchanger is connected with a top hot water inlet of the hot water buffer tank, a hot water supply pipe is arranged at the top of the hot water buffer tank, the hot water return pipe is divided into two branch pipes which are respectively connected with a bottom water inlet pipeline of the hot water buffer tank and a tap water replenishing pipeline of the first hot water heat storage tank, and a temperature-adjusting tap water pipeline is arranged at the.
In a building-type gas distributed energy project, a gas internal combustion engine is generally turned on in air-conditioning seasons (winter and summer) and continuously operated. The demand of domestic hot water is usually discontinuous, especially for bathing, and the time is generally concentrated at 6:00-10:00 at night. In order to solve the contradiction between the continuous supply of cylinder sleeve water and the intermittent use of domestic hot water, the utility model discloses a hot water buffer tank has been set up.
The hot water system is provided with three-stage heating. The primary heating is carried out by using medium-temperature water, the medium-temperature water at about 40-60 ℃ is supplied to the water and is cooled to 40-50 ℃ after passing through the first heat exchanger, and cold water in the first hot water heat storage tank is heated and heated through the first heat exchanger. And hot water from the first hot water heat storage tank enters the second hot water heat storage tank. And the secondary heating is performed by adopting high-temperature water, the temperature of the high-temperature water at 90-95 ℃ is reduced to 80-85 ℃ after the water passes through the second heat exchanger, and the hot water in the second hot water heat storage tank is continuously heated and heated by the second heat exchanger. And hot water from the second hot water heat storage tank enters a hot water buffer tank. The third-stage heating adopts hot water (or hot water from other heat sources such as a gas boiler and a solar boiler) after heat exchange of flue gas, the hot water with the temperature of more than 85 ℃ is cooled to about 60 ℃ after passing through a third heat exchanger, and the water in a hot water buffer tank is heated through the third heat exchanger. For the occasions needing hot water circulation, the hot water main water supply pipe is provided with a hot water circulating pipe, hot water in a hot water return pipe enters a hot water buffer tank, and hot water discharged from the hot water buffer tank is directly used as hot water for supplying water.
In the above scheme, a group of internal circulation pumps are arranged on the bottom water outlet pipelines of the hot water buffer tank, the first hot water heat storage tank and the second hot water heat storage tank.
In the above scheme, be provided with first three-way valve on the hot water return pipe, two exports of this first three-way valve are connected two branch pipes of hot water return pipe respectively. The water quantity entering the hot water heat storage tank and the hot water buffer tank is adjusted through the first three-way valve, so that the purpose of controlling the hot water temperature of the hot water buffer tank in a hot water circulation state is achieved.
In the above scheme, tap water enters the temperature-adjusting tap water pipeline of the hot water buffer tank and the tap water replenishing pipeline of the first hot water heat storage tank through the second three-way valve respectively.
And the tap water supplement enters the first hot water heat storage tank and the hot water buffer tank through the second three-way valve respectively. The water quantity entering the first hot water heat storage tank and the hot water buffer tank can be adjusted through the second three-way valve, and the purpose of controlling the temperature of the hot water outlet water is achieved.
In the above scheme, a group of external circulating pumps is arranged on the hot water return pipe.
In the above scheme, the first heat exchanger, the second heat exchanger and the third heat exchanger are plate heat exchangers or tubular heat exchangers.
Has the advantages that: the utility model discloses an adopt tertiary heat ware to establish ties gas internal-combustion engine generating set's well warm water, high temperature water and flue gas waste heat or other heat source hot water, solved the utilization problem of gas internal-combustion engine well warm water, high temperature water, flue gas waste heat betterly, carry out the step utilization to the heat, improved gas internal-combustion engine's energy comprehensive utilization efficiency to about 80-90%. And the problems of continuous production of the gas internal combustion engine and intermittent use of domestic hot water are better solved.
Drawings
Fig. 1 is a schematic view of the working process of the present invention.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the following examples and drawings.
Example 1
As shown in fig. 1, the utility model discloses a hot water system based on gas internal-combustion engine generating set's waste heat cascade utilization comprises first heat exchanger 1, second heat exchanger 2, third heat exchanger 3, first hot water heat accumulation jar 4, second hot water heat accumulation jar 5, hot water buffer tank 6, internal circulation pump 7, external circulation pump 8, first three-way valve 9, second three-way valve 10, running water moisturizing pipe 11, the running water pipeline 12 and the pipeline and the ordinary valve of adjusting the temperature.
The first heat exchanger 1, the second heat exchanger 2 and the third heat exchanger 3 are plate heat exchangers or tubular heat exchangers. The bottom of the first hot water heat storage tank 4 is provided with a tap water replenishing pipe 11. The upper hot water outlet of the first hot water heat storage tank 4 is connected with the bottom water inlet pipeline of the second hot water heat storage tank 5. The hot water outlet at the upper part of the second hot water heat storage tank 5 is connected with a water inlet pipeline at the bottom of the hot water buffer tank 6. A hot side inlet of the first heat exchanger 1 is connected with a medium temperature water pipeline of a gas internal combustion engine, a cold side inlet of the first heat exchanger 1 is connected with a water outlet pipeline at the bottom of the first hot water heat storage tank 4, a hot side outlet of the first heat exchanger 1 is connected with a hot water inlet pipeline at the top of the first hot water heat storage tank 4, a hot side inlet of the second heat exchanger 2 is connected with a high temperature water pipeline of the gas internal combustion engine, a cold side inlet of the second heat exchanger 2 is connected with a water outlet pipeline at the bottom of the second hot water heat storage tank 5, a hot side outlet of the second heat exchanger 2 is connected with a hot water inlet pipeline at the top of the second hot water heat storage tank 5, hot water generated after heat exchange with flue gas of the gas internal combustion engine or hot water of other places enters a hot side water inlet pipeline of the third heat exchanger 3, a cold side inlet of the third heat exchanger 3 is connected with a water outlet, the top of hot water buffer tank 6 sets up the hot water delivery pipe, and the hot water wet return falls into two branch pipes and links to each other with the bottom intake pipe of hot water buffer tank 6 and the running water moisturizing pipeline of first hot water heat accumulation jar 4 respectively, is provided with first three-way valve 9 on the hot water wet return, and two branch pipes of hot water wet return are connected respectively to two exports of this first three-way valve 9. And the hot water return pipe is also provided with a group of external circulating pumps 8.
The top of the hot water buffer tank 6 is provided with a temperature-regulating tap water line 12. Tap water respectively enters a temperature-adjusting tap water pipeline 12 of the hot water buffer tank 6 and a tap water replenishing pipeline 11 of the first hot water storage tank 4 through a second three-way valve 10.
A group of internal circulation pumps 7 are arranged on the bottom water outlet pipelines of the hot water buffer tank 6, the first hot water heat storage tank 4 and the second hot water heat storage tank 5.
The above description is provided for the purpose of describing the present invention in more detail with reference to the preferred embodiments, and it should not be construed that the present invention is limited to these descriptions, and it will be apparent to those skilled in the art that the present invention can be implemented in many ways without departing from the spirit and scope of the present invention.
Claims (6)
1. The utility model provides a hot-water heating system based on waste heat cascade utilization of gas internal-combustion engine generating set which characterized in that: the heat pump water heater comprises a first heat exchanger, a second heat exchanger, a third heat exchanger, a first hot water heat storage tank, a second hot water heat storage tank and a hot water buffer tank, wherein a tap water replenishing pipe is arranged at the bottom of the first hot water heat storage tank, an upper hot water outlet of the first hot water heat storage tank is connected with a bottom water inlet pipeline of the second hot water heat storage tank, an upper hot water outlet of the second hot water heat storage tank is connected with a bottom water inlet pipeline of the hot water buffer tank, a hot side inlet of the first heat exchanger is connected with a medium temperature water pipeline of a gas internal combustion engine, a cold side inlet of the first heat exchanger is connected with a bottom water outlet pipeline of the first hot water heat storage tank, a hot side outlet of the first heat exchanger is connected with a top hot water inlet pipeline of the first hot water heat storage tank, a hot side inlet of the second heat exchanger is connected with a high temperature water pipeline of the gas internal combustion engine, and a cold side inlet of, the hot side outlet of the second heat exchanger is connected with a hot water inlet pipeline at the top of the second hot water heat storage tank, hot water generated after heat exchange with flue gas of a gas combustion engine or hot water supplied by other heat sources enters a hot side water inlet pipeline of the third heat exchanger, a cold side inlet of the third heat exchanger is connected with a bottom water outlet pipeline of the hot water buffer tank, the hot side outlet of the third heat exchanger is connected with a top hot water inlet of the hot water buffer tank, a hot water supply pipe is arranged at the top of the hot water buffer tank, the hot water return pipe is divided into two branch pipes which are respectively connected with a bottom water inlet pipeline of the hot water buffer tank and a tap water replenishing pipeline of the first hot water heat storage tank, and a temperature-adjusting tap water pipeline is arranged at the.
2. The waste heat cascade utilization hot water system based on the gas combustion engine generator set is characterized in that: and a group of internal circulating pumps are arranged on the bottom water outlet pipelines of the hot water buffer tank, the first hot water heat storage tank and the second hot water heat storage tank.
3. The waste heat cascade utilization hot water system based on the gas combustion engine generator set is characterized in that: and a first three-way valve is arranged on the hot water return pipe, and two outlets of the first three-way valve are respectively connected with two branch pipes of the hot water return pipe.
4. The waste heat cascade utilization hot water system based on the gas combustion engine generator set is characterized in that: tap water respectively enters a temperature-adjusting tap water pipeline of the hot water buffer tank and a tap water replenishing pipeline of the first hot water heat storage tank through a second three-way valve.
5. The waste heat cascade utilization hot water system based on the gas combustion engine generator set according to any one of claims 1 to 4, characterized in that: and a group of external circulating pumps are arranged on the hot water return pipe.
6. The waste heat cascade utilization hot water system based on the gas combustion engine generator set is characterized in that: the first heat exchanger, the second heat exchanger and the third heat exchanger are plate heat exchangers or tubular heat exchangers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020457005.8U CN211953785U (en) | 2020-04-01 | 2020-04-01 | Waste heat cascade utilization's hot-water heating system based on gas internal-combustion engine generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020457005.8U CN211953785U (en) | 2020-04-01 | 2020-04-01 | Waste heat cascade utilization's hot-water heating system based on gas internal-combustion engine generating set |
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| CN211953785U true CN211953785U (en) | 2020-11-17 |
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| CN202020457005.8U Active CN211953785U (en) | 2020-04-01 | 2020-04-01 | Waste heat cascade utilization's hot-water heating system based on gas internal-combustion engine generating set |
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| CN (1) | CN211953785U (en) |
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2020
- 2020-04-01 CN CN202020457005.8U patent/CN211953785U/en active Active
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