CN111964129B - Building type absorption heat exchange station capable of realizing partition heat supply - Google Patents
Building type absorption heat exchange station capable of realizing partition heat supply Download PDFInfo
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- CN111964129B CN111964129B CN202010823282.0A CN202010823282A CN111964129B CN 111964129 B CN111964129 B CN 111964129B CN 202010823282 A CN202010823282 A CN 202010823282A CN 111964129 B CN111964129 B CN 111964129B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
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Abstract
The invention discloses a building type absorption heat exchange station capable of realizing district heating, belonging to the field of energy conservation; wherein, the primary network inlet is connected with the hot water pipeline inlet of the generator of the absorption heat exchanger which respectively supplies heat to the three subareas, so as to enter the generator of the first stage; an evaporator hot water pipeline outlet of the absorption heat exchanger is divided into two branches, one branch is connected with a partitioned water supplementing constant-pressure device through a water supplementing inlet, and the other branch is sequentially connected with a flowmeter and a primary network booster pump and then connected with a primary network outlet of equipment; a water supplementing inlet in the partitioned water supplementing and pressure stabilizing device is connected with a water supplementing outlet through one or three open water tanks and 3 levels of water supplementing pipelines respectively, and a water supplementing pump, a flowmeter, a pressure switch and a pressure tank are sequentially arranged on each level of water supplementing pipeline. The invention realizes independent heat supply for multiple zones by only one device, reduces the number of devices and reduces the occupied area; the single building type absorption heat exchange station can supply heat to the single building with a plurality of subareas, and the multi-span heat metering is realized.
Description
Technical Field
The invention belongs to the technical field of energy conservation, and particularly relates to a building type absorption heat exchange station capable of realizing district heating.
Background
The lithium bromide absorption heat exchanger is a brand new heat exchange device, is widely applied to a central heating system in northern areas at present, completes the heat exchange process from primary network high-temperature hot water of a terminal heating station to secondary network household hot water, and compared with a traditional system adopting various conventional heat exchangers, the absorption heat exchanger can greatly reduce the return water temperature of the primary network, improve the return water temperature difference and the heating capacity of a pipe network, and realize clean heating. The building type absorption heat exchange station is a brand new distributed heat station (see journal article: research and development and application [ J ] of the building type absorption heat exchanger, 2019(05):1-10+59) developed based on the absorption heat exchanger, a temperature, pressure and flow monitoring device and a water replenishing system of a small building type absorption heat exchanger and a conventional heat station are integrated in the building type absorption heat exchange station, the floor area is only 1-3 square meters, the building type absorption heat exchange station can be distributed beside each building to independently supply heat for each building, independent adjustment is realized, the problem of uneven cold and heat of a heat supply mode of a traditional centralized heat station can be effectively reduced, a split-building heat metering mode can be supported, the building type absorption heat exchange station is a promising heat supply mode, and a certain-scale community and office building heat supply demonstration is performed in northern areas of China.
However, the existing heating demonstration is mostly performed for buildings with floor heights not exceeding 7 floors, and is difficult to be implemented in higher-rise buildings, and the main problem is that the problem of heating in high and low zones or zones in high, medium and low zones of the high-rise buildings is difficult to effectively solve. At present, if a building type absorption heat exchange station is adopted, such as the technology disclosed in patent CN 201610676397.5, three units are required to be installed for supplying heat to three zones for a building with three zones, so that the advantage of small floor space occupied by building type heat supply does not exist; in the prior art, a single unit is adopted to be provided with a low area of two buildings, and the other unit is provided with a high area of two buildings, so that the pipeline is prolonged, the heat supply cost is increased, and meanwhile, the multi-building heat metering is difficult to carry out, and the original purpose of building type heat supply cannot be achieved. If a building type absorption heat supply mode is better realized, one building type absorption heat exchange station needs to supply heat for a plurality of subareas at the same time. This just needs to adopt a heat transfer station to insert a plurality of different secondary pipe networks, can not appear the influence each other of temperature, pressure, flow between these pipe networks, needs to guarantee the heating initial stage simultaneously, and the heat transfer station can preheat each secondary pipe network in order to prevent to appear solution crystallization problem behind the circulating solution under the condition of not starting absorption formula circulation.
Therefore, the building type absorption heat exchange station capable of realizing district heating comprises a building type absorption heat exchanger comprising a multistage independent absorption heat exchange process, a district water supplementing and pressure stabilizing device, a multistage independent secondary network circulating pump, a flowmeter, a thermometer, a pressure gauge, a primary network pipeline and a multistage secondary network pipeline. The equipment is externally provided with only a primary network inlet and outlet and a multi-stage independent secondary network inlet and outlet.
Building formula absorption heat exchange station equipment can realize the mutual independence of multistage secondary network through inside independent multistage absorption heat transfer flow to can realize that the heating initial stage adopts inside water board at different levels to trade the function that prevents the crystallization problem to the secondary network waste heat. Meanwhile, a subarea water supplementing and pressure stabilizing device is adopted in the equipment, so that a plurality of different pressure stabilizing points can be provided simultaneously, and the requirements of different subarea pressures are met. In addition, the device is internally integrated with the monitoring functions of temperature, pressure and flow, can realize the data monitoring and heat metering functions of a conventional heat exchange station, and is matched with the implementation of multi-span heat metering. This application equipment has eliminated the drawback that needs a plurality of building formula absorption heat exchange station equipment when present monomer building exists a plurality of subregion for building formula absorption heat exchange mode no longer receives the influence of building subregion quantity.
Disclosure of Invention
In view of the problems existing in the background art, the invention provides a building type absorption heat exchange station capable of realizing district heating, which is characterized by comprising the following components: the system comprises an absorption heat exchanger, a subarea water supplementing and pressure stabilizing device, a primary network booster pump, a 3-level independent secondary network circulating pump, a flowmeter, a primary network pipeline and a 3-level secondary network pipeline, wherein a primary network inlet is connected with a generator hot water pipeline inlet of the building absorption heat exchanger so as to enter a first-level generator; an evaporator hot water pipeline outlet of the absorption heat exchanger is divided into two branches, one branch is connected with a partitioned water supplementing constant-pressure device through a water supplementing inlet, and the other branch is sequentially connected with a flowmeter and a primary network booster pump and then connected with a primary network outlet of equipment;
the secondary net water inlet of each subarea is converged with one water replenishing outlet of the subarea water replenishing constant-pressure device and then is connected with the corresponding graded cold water pipeline inlet in the absorption heat exchanger, namely the secondary net inlet is the constant-pressure point of each grade of secondary net water; and the outlet of each stage of cold water pipeline is connected with the corresponding secondary net water outlet.
The absorption heat exchanger for respectively supplying heat to the three subareas comprises: the system comprises a 3-stage internal independent absorption heat exchange process, a generator hot water pipeline, an evaporator hot water pipeline, a water-water plate heat exchange water pipeline and a 3-stage independent cold water pipeline, wherein the evaporation pressure in each stage of absorption cycle is sequentially increased step by step; the generator hot water pipeline is connected with each stage of generator in the forward direction, and the evaporator hot water pipeline is connected with each stage of evaporator in the reverse direction; the outlet of the generator hot water pipeline is connected with the main inlet of the water-water plate heat exchange water pipeline, and the main outlet of the water-water plate heat exchange water pipeline is connected with the inlet of the evaporator hot water pipeline; the water-water plate heat exchange water pipeline is connected with the heat exchange sides of all levels of water-water plates; the inlets of all stages of cold water pipelines are divided into two paths, wherein one path is connected with the condenser and the absorber, and the other path is connected with the cold exchange side of the water plate.
The mode that water board trades hot water pipeline and water board heat exchange side at different levels and links to each other divide into: the all-parallel mode, the forward series mode and the reverse series mode are three, wherein:
the full parallel mode is as follows: the total inlet of the water-water plate heat exchange water pipeline is divided into 3 paths, each path is respectively connected with the inlet of the heat exchange side of each level of water-water plate, the outlets of the heat exchange side of each level of water-water plate are converged, and then the total outlet of the water-water plate heat exchange water pipeline is connected;
the forward series mode is as follows: the main inlet of the water-water plate heat exchange water pipeline sequentially communicates all stages of water-water plates from low evaporation pressure to high evaporation pressure and then is connected with the main outlet of the water-water plate heat exchange water pipeline;
the reverse series connection mode is as follows: the main inlet of the water-water plate heat exchange water pipeline is communicated with the water-water plates at all levels in sequence according to the sequence of evaporation pressure from high to low, and then is connected with the main outlet of the water-water plate heat exchange water pipeline.
The connection mode of the cold water pipeline connected with the condenser and the absorber is as follows: the parallel connection mode, the series connection mode that the absorber is the entry and the series connection mode that the condenser is the entry are three, wherein:
the parallel connection mode is as follows: the condenser is divided into two parallel branches, one branch is connected with the condenser, the other branch is connected with the absorber, and the outlets of the two branches are converged;
the absorber is connected in series at the inlet: the absorber and the condenser are connected in sequence;
the series connection mode of the condenser as an inlet is as follows: the condenser and the absorber are connected in sequence.
The subregion moisturizing level pressure device includes: the water replenishing system comprises a water replenishing inlet, one or three open water tanks, a water replenishing pump, a flowmeter, a pressure switch, a pressure tank, a water replenishing outlet with a first-level secondary network constant pressure, a water replenishing outlet with a second-level secondary network constant pressure and a water replenishing outlet with a third-level secondary network constant pressure, wherein the water replenishing inlet is respectively connected with the water replenishing outlet through the one or three open water tanks and a 3-level water replenishing pipeline, and the water replenishing pump, the flowmeter, the pressure switch and the pressure tank are sequentially arranged on each level of water replenishing pipeline.
When the water supplementing inlet is connected with a water supplementing outlet through an open water tank and a 3-level water supplementing pipeline respectively, the water supplementing inlet is connected with the inlet of the open water tank through a water supplementing valve of the water tank, the outlet of the open water tank is divided into three-level water supplementing pipelines which are connected in parallel, and the 3-level water supplementing pipeline is connected with the water supplementing outlet of the first-level secondary network constant pressure, the water supplementing outlet of the second-level secondary network constant pressure and the water supplementing outlet of the third-level secondary network constant pressure respectively.
When the water replenishing inlet is respectively connected with a water replenishing outlet through three open water tanks and 3-level water replenishing pipelines, the water replenishing inlet is divided into three paths which are connected in parallel, each path is respectively connected with the inlet of one open water tank through a water tank water replenishing valve, the outlet of the open water tank is connected with a one-level water replenishing pipeline, and each level of water replenishing pipeline is respectively connected with one of the water replenishing outlet with the first-level secondary network constant pressure, the water replenishing outlet with the second-level secondary network constant pressure or the water replenishing outlet with the third-level secondary network constant pressure.
A thermometer and a pressure gauge are arranged on a pipeline connecting an inlet of the primary network and an inlet of a hot water pipeline of a generator of the building type absorption heat exchanger; in a branch connected with an outlet of a primary network in an outlet of a hot water pipeline of an evaporator of the absorption heat exchanger, a thermometer is arranged on a pipeline in front of the flowmeter, and pressure gauges are arranged on pipelines in front of and behind the primary network booster pump.
And a pressure gauge and a thermometer are arranged on a pipeline after the secondary net water inlet of each subarea and one water replenishing outlet of the subarea water replenishing and pressure stabilizing device are converged.
And a thermometer, a flowmeter, a pressure gauge, a secondary network circulating pump and a pressure gauge are sequentially arranged on the pipeline where the outlet of each level of cold water pipeline is connected with the corresponding secondary network water outlet.
The invention has the beneficial effects that:
1. through multistage independent absorption heat transfer flow and multistage independent cold water pipeline (be used for heating system also be independent secondary water pipeline promptly), realized the purpose to a plurality of independent secondary water route heating to a plurality of secondary water routes all possess independent regulation flow, temperature, pressure condition, do not have the interact, have avoided the string pressure condition that appears between each different pressure water route.
2. A plurality of independent constant pressure points are provided by the internal integrated subarea water supplementing constant pressure device and correspond to different pressure ranges of a plurality of different subareas;
3. the single building type absorption heat exchange station can supply heat to single buildings with a plurality of subareas, the occupied area is reduced, the investment is reduced, and the multi-span heat metering is realized.
4. Through an independent absorption type heat exchange process, each stage has independent water plate exchange, the heating process of cold water can be realized only through the water plate exchange of each stage under the condition that solution circulation and refrigerant water circulation are not started at the starting initial stage of the machine, and the temperature of secondary water is increased to be more than 30 ℃ so as to prevent the problem of solution crystallization after the solution circulation.
5. Through the multistage independent absorption type heat exchange process, the water temperature of hot water is reduced in multistage cascade in the multistage generator and the multistage evaporator, and the performance of the absorption type heat exchanger can be effectively improved.
6. The multi-zone independent heat supply can be realized by only one device, the number of devices is reduced, the initial investment is reduced, and the occupied area required by heat supply by adopting the absorption heat exchanger is reduced.
7. If the solution and the refrigerant water circulation on the vacuum side of the unit need to be overhauled during the heating period, each stage of independent water plate can be adopted to heat cold water at each stage, and the reliability of continuous heating of the unit is ensured.
8. Building multi-span heat metering is realized through thermometers arranged at an inlet and an outlet of the primary network and a flowmeter arranged at the inlet.
Drawings
Fig. 1 is a schematic structural diagram of independent absorption heat exchange processes (solution circulation, refrigerant-water circulation) and cold water pipelines (in a series connection mode with an absorber as an inlet) in embodiment 1 of a building-type absorption heat exchange station capable of realizing district heating according to the present invention;
FIG. 2 is a schematic view of an absorption heat exchanger in example 1 of the present invention;
fig. 3 is a schematic view of a water-water plate heat exchange water pipeline connected (in a fully parallel manner) to each stage of water-water plate heat exchange side in embodiment 1 of the present invention;
fig. 4 is a schematic diagram of a building-type absorption heat exchange station for realizing 3 district heating in embodiment 1 of the invention;
FIG. 5 is a schematic view of a partitioned water replenishing and pressure stabilizing device including an open water tank in embodiment 1 of the present invention;
FIG. 6 is a schematic view of a partitioned water replenishing and pressure stabilizing device including a plurality of open water tanks according to embodiment 2 of the present invention;
fig. 7 is a schematic view of a water-water plate heat exchange water pipeline connected (in a forward series connection manner) to each stage of water-water plate heat exchange side in embodiment 3 of the present invention;
fig. 8 is a schematic view of a water-water plate heat exchange water pipeline connected to heat exchange sides of water-water plates of different stages (in an inverse series connection manner) in embodiment 4 of the present invention;
FIG. 9 is a schematic diagram of an independent absorption heat exchange process and an independent cold water pipeline (in parallel) in example 5 of the present invention;
fig. 10 is a schematic diagram of an independent absorption heat exchange process and an independent cold water pipeline (in a series connection mode using a condenser as an inlet) in example 6 of the present invention.
Wherein:
1-a generator, 2-a condenser, 3-an absorber, 4-an evaporator, 5-a solution heat exchanger, 6-a water-water plate exchanger, 7-a hot water pipeline outlet of the generator, 8-a water-water plate heat exchange water pipeline inlet, 9-a water-water plate heat exchange water pipeline outlet, 10-an evaporator hot water pipeline inlet, 13-a primary net inlet, 14-a primary net outlet, 15-an absorption heat exchanger, 16-a regional water supplementing constant pressure device, 17-a water supplementing inlet, 18-a building type absorption heat exchange station whole body capable of realizing regional heat supply, 19-an open water tank, 20-a primary net booster pump, 21-a secondary net circulating pump, 22-a flow meter, 23-a thermometer, 24-a pressure gauge, 25-a water supplementing pump and 26-a pressure tank, 27-a water tank water replenishing valve, 28-a pressure switch, 101-a first-stage generator, 102-a second-stage generator, 103-a third-stage generator, 401-a first-stage evaporator, 402-a second-stage evaporator, 403-a third-stage evaporator, 601-a first-stage water plate exchanger, 602-a second-stage water plate exchanger, 603-a third-stage water plate exchanger, 1101-a first-stage secondary net inlet, 1102-a second-stage secondary net inlet, 1103-a third-stage secondary net inlet, 1201-a first-stage secondary net outlet, 1202-a second-stage secondary net outlet, 1203-a third-stage secondary net outlet, 1801-a first-stage secondary net constant pressure water replenishing outlet, 1802-a second-stage secondary net constant pressure water replenishing outlet and 1803-a third-stage secondary net constant pressure water replenishing outlet.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, an embodiment 1 of a building-type absorption heat exchange station capable of implementing 3 district heating according to the present invention provides heat for low, middle and high areas of a building according to the most common use cases, and includes: the system comprises an absorption heat exchanger 15 for respectively supplying heat to three subareas, a subarea water supplementing and pressure stabilizing device 16, a primary net booster pump 20, a 3-level independent secondary net circulating pump 21, a flowmeter 22, a thermometer 23, a pressure gauge 24, a primary net pipeline and a 3-level secondary net pipeline; the primary net inlet 13 is connected with a generator hot water pipeline inlet of the building type absorption heat exchanger 15 through a thermometer 23 and a pressure gauge 24 so as to enter the first-stage generator 1; an evaporator hot water pipeline outlet of the absorption heat exchanger 15 is divided into two branches, one branch is connected with a subarea water supplementing constant pressure device 16 through a water supplementing inlet 17, and the other branch is sequentially connected with a temperature gauge 23, a flow meter 22, a pressure gauge 24, a primary network booster pump 20 and a pressure gauge 24 and then connected with a primary network outlet 14 of equipment to leave the building type absorption heat exchange station.
The building type absorption heat exchange station supplies heat for a single building, the heat is distributed beside each building, and secondary network hot water in different subareas in the single building is respectively connected to all levels of secondary network pipelines of the heat exchange station. The secondary net water inlet of each subarea is converged with one water replenishing outlet of the subarea water replenishing constant pressure device 16 and then is connected with the corresponding graded cold water pipeline inlets in the absorption heat exchanger 15 through a pressure gauge 24 and a thermometer 23, namely the secondary net inlets are constant pressure points of all grades of secondary net water; the outlet of each stage of cold water pipeline is connected with a thermometer 23, a flowmeter 22, a pressure gauge 24, a secondary network circulating pump 21 and the pressure gauge 24 in sequence and then connected with the corresponding secondary network water outlet.
The partitioned water replenishing and pressure stabilizing device 16 shown in fig. 5 comprises a water replenishing inlet 17, an open water tank 19, a water replenishing pump 25, a flow meter 22, a pressure gauge 24, a pressure switch 28, a pressure tank 26, a first-stage secondary-network pressure stabilizing water replenishing outlet 1801, a second-stage secondary-network pressure stabilizing water replenishing outlet 1802 and a third-stage secondary-network pressure stabilizing water replenishing outlet 1803, wherein the water replenishing inlet 17 is respectively connected with one water replenishing outlet through one or three open water tanks 19 and 3-stage water replenishing pipelines, and each stage of water replenishing pipeline is sequentially provided with the pressure gauge 24, the water replenishing pump 25, the pressure gauge 24, the flow meter 22, the pressure switch 28 and the pressure tank 26.
In this embodiment, it is specific, including an open water tank 19, the moisturizing entry 17 is through linking to each other with the entry of open water tank 19 through water tank moisturizing valve 27, and the exit of open water tank 19 is divided into the tertiary moisturizing pipeline of parallelly connected, and 3 grades of moisturizing pipelines respectively with moisturizing export 1801 of first order secondary network constant pressure, moisturizing export 1802 of second order secondary network constant pressure and moisturizing export 1803 of third order secondary network constant pressure link to each other.
When the water tank water replenishing device works, hot water from an outlet of a hot water pipeline of the evaporator is connected to the water replenishing inlet 17 and then is connected to the open water tank 19 through the water tank water replenishing valve 27, and the opening and closing of the water tank water replenishing valve 27 are controlled by the water level of the open water tank 19; the water outlet of the open water tank 19 is divided into 3 pipelines, each pipeline is sequentially connected with a water replenishing pump 25, a flowmeter 22, a pressure switch 28 and a pressure tank 26, the water replenishing frequency of the water replenishing pump 25 is controlled by the pressure switch 28, and the pipeline pressure is stabilized by the pressure tank 26. After passing through the pressure tank 26, each water replenishing pipeline flows out from a water replenishing outlet 1801 with constant pressure of the first-level secondary network, a water replenishing outlet 1802 with constant pressure of the second-level secondary network or a water replenishing outlet 1803 with constant pressure of the third-level secondary network and is respectively connected with inlets (a first-level secondary network inlet 1101, a second-level secondary network inlet 1102 and a third-level secondary network inlet 1103) of cold water pipelines at different levels for constant pressure of inlets.
The absorption heat exchanger 15 shown in fig. 1 to 3 includes: the system comprises a 3-stage internal independent absorption type heat exchange flow, a generator hot water pipeline, an evaporator hot water pipeline, a water-water plate heat exchange water pipeline and a 3-stage independent cold water pipeline, wherein the 3-stage internal independent absorption type heat exchange flow comprises a 3-stage generator 1, a 3-stage condenser 2, a 3-stage absorber 3, a 3-stage evaporator 4, a 3-stage solution heat exchanger 5 and a 3-stage water-water plate exchanger 6; the evaporation pressure in each stage of absorption cycle is increased step by step (the highest in the third stage); namely, the evaporation temperature (namely the saturated water temperature in the cavity) of each stage of evaporator 4 is increased in sequence; the generator hot water pipeline is connected with each stage of generator 1 in the forward direction, the evaporator hot water pipeline is connected with each stage of evaporator 4 in the reverse direction, wherein the connection in the direction of gradually increasing the evaporation pressure is in the forward direction, and the connection in the reverse direction is in the reverse direction; the generator hot water pipeline outlet 7 is connected with a water-water plate heat exchange water pipeline main inlet 8, and a water-water plate heat exchange water pipeline main outlet 9 is connected with an evaporator hot water pipeline inlet 10; the water-water plate heat exchange water pipeline is connected with the hot side of each stage of water-water plate heat exchange 6; the inlet of each stage of partition cold water pipeline is divided into two paths, wherein one path is connected with the condenser 2 and the absorber 3, the other path is connected with the cold side of the water plate 6, and the two paths are converged to the outlet of each stage of partition cold water pipeline.
Because the cold water pipeline of each stage is relatively independent from the cold water pipelines of other stages, the temperature, the flow and the pressure can be independently adjusted. Meanwhile, because each stage of independent absorption type heat exchange flow comprises the independent water-water plate exchanger 6, the cold water of the stage is heated and the temperature of the cold water is increased only by the water-water plate exchanger 6 of each stage under the condition that the circulation of the solution and the refrigerant water is not started in the starting process, so that the crystallization problem after the circulation of the solution can be prevented. When solution and refrigerant water circulation on the vacuum side of the unit need to be maintained during heating, the water plates at all levels can be adopted to replace 6 to independently heat cold water at all levels, and the heat supply requirements of all levels during unit maintenance are met.
The mode that the hot water pipeline is traded 6 hot sides with the water board at different levels and is traded and divide into: the all-parallel mode, the forward series mode and the reverse series mode are three, wherein:
the full parallel mode is as follows: the total inlet 8 of the water-water plate heat exchange water pipeline is divided into 3 paths, each path is respectively connected with the inlet of the heat side of each level of water-water plate heat exchange 6, the outlets of the heat sides of each level of water-water plate heat exchange 6 are converged, and then the total outlet 9 of the water-water plate heat exchange water pipeline is connected;
the forward series mode is as follows: the water-water plate heat exchange water pipeline main inlet 8 is used for sequentially communicating the water-water plates of all levels 6 according to the sequence of evaporation pressure from low to high and then is connected with the water-water plate heat exchange water pipeline main outlet 9;
the reverse series connection mode is as follows: the water-water plate heat exchange water pipeline main inlet 8 is communicated with the water-water plates at all levels 6 in sequence according to the sequence of evaporation pressure from high to low, and then is connected with the water-water plate heat exchange water pipeline main outlet 9.
The connection mode of one path connected with the condenser 2 and the absorber 3 in the cold water pipeline is divided into: the parallel connection mode, the series connection mode that the absorber is the entry and the series connection mode that the condenser is the entry are three, wherein:
the parallel connection mode is as follows: the device is divided into two parallel branches, one branch is connected with the condenser 2, the other branch is connected with the absorber 3, and the outlets of the two branches are converged and then converged to the outlet of the partition cold water pipeline of each stage together with the outlet of the cold side of the water plate exchanger 6;
the absorber is connected in series at the inlet: the absorber 3 and the condenser 2 are sequentially connected, and the outlets on the cold sides of the water-water plate exchangers 6 are converged to the outlets of the partition cold water pipelines at all stages;
the series connection mode of the condenser as an inlet is as follows: the condenser 2 and the absorber 3 are connected in sequence, and the outlets on the cold sides of the water-water plates 6 are converged to the outlets of the partition cold water pipelines at all stages.
In embodiment 1, the connection between the hot side of the water-water plate heat exchange water pipeline and the hot side of each water-water plate heat exchange 6 is divided into: and (4) a full parallel mode.
In embodiment 1, the heat absorption flow through the hot side of each stage of water-water plate heat exchanger 6 via the water-water plate heat exchange water pipeline is as follows: hot water entering from a main inlet 8 of the water-water plate heat exchange water pipeline is divided into 3 paths, and is respectively connected with hot side inlets of the first-stage water-water plate exchanger 601, the second-stage water-water plate exchanger 602 and the third-stage water-water plate exchanger 603, and then outlets of heat exchange sides of the water-water plates flow out and are converged to a main outlet 9 of the water-water plate heat exchange water pipeline and are discharged;
in example 1, the connection mode of one of the cold water lines connected to the condenser 2 and the absorber 3 is divided into: the condenser is connected in series at an inlet;
when the generator works, high-temperature hot water flowing in the hot water pipeline of the generator sequentially passes through the first-stage generator 101 of the 1 st stage, the second-stage generator 102 of the 2 nd stage and the third-stage generator 103 of the 3 rd stage, releases heat and then flows to the main inlet 8 of the water-plate heat exchange water pipeline from the hot water pipeline outlet 7 of the generator; then heat is absorbed by the hot side of each stage of water-water plate heat exchange 6 through the water-water plate heat exchange water pipeline, and the heat after heat absorption flows to the inlet 10 of the evaporator hot water pipeline from the main outlet 9 of the water-water plate heat exchange water pipeline; the low-temperature hot water flowing in the hot water pipeline inlet 10 of the evaporator is discharged after passing through the third-stage evaporator 403 of the 3 rd stage, the second-stage evaporator 402 of the 2 nd stage and the first-stage evaporator 401 of the 1 st stage in sequence to release heat; after cooling water flowing in the cooling water pipeline enters each stage of absorption type heat exchange process from the inlets of the subarea cold water pipelines of each stage (a first stage secondary net inlet 1101, a second stage secondary net inlet 1102 and a third stage secondary net inlet 1103), the cooling water enters the cold side water inlet of the water plate exchanger 6 in one path before the inlets of the absorbers 3 of each stage, the other path of cooling water sequentially passes through the absorbers 3 and the condensers 2 to absorb heat, and then the cooling water is converged to the subarea cold water outlets of each stage (a first stage secondary net outlet 1201, a second stage secondary net outlet 1202 and a third stage secondary net outlet 1203) and discharged from the outlets of the condensers 2 and the cold side water outlet of the water plate exchanger 6.
As shown in fig. 6, in example 2 of the present invention, the undescribed portion is the same as in example 1,
in embodiment 2, the partitioned water replenishing and pressure-stabilizing device 16 includes three open water tanks 19, the water replenishing inlet 17 is divided into three parallel paths, and is connected to the inlet of one open water tank 19 through a water tank water replenishing valve 27, the outlet of the open water tank 19 is connected to the primary water replenishing pipeline, and each stage of water replenishing pipeline is connected to one of the water replenishing outlet 1801 of the primary secondary network constant pressure, the water replenishing outlet 1802 of the secondary network constant pressure or the water replenishing outlet 1803 of the tertiary secondary network constant pressure;
the water outlet pipeline of each open water tank 19 is sequentially connected with a water replenishing pump 25, a flowmeter 22, a pressure switch 28 and a pressure tank 26, the water replenishing frequency of the water replenishing pump 25 is controlled by the pressure switch 28, and the pipeline pressure is stabilized by the pressure tank 26. Each water replenishing pipeline is respectively connected with the inlets 11 of all levels of cold water pipelines to realize constant pressure of the inlets after passing through the pressure tank 26.
When the water-saving type evaporator water replenishing device works, hot water from an outlet of a hot water pipeline of the evaporator is connected into the water replenishing inlet 17 and then divided into 3 pipelines which are connected to the respective open water tanks 19 through the water tank water replenishing valves 27, and the opening and closing of the water tank water replenishing valves 27 are controlled by the water levels of the open water tanks 19; the water outlet pipeline of each open water tank 19 is sequentially connected with a water replenishing pump 25, a flowmeter 22, a pressure switch 28 and a pressure tank 26, the water replenishing frequency of the water replenishing pump 25 is controlled by the pressure switch 28, and the pipeline pressure is stabilized by the pressure tank 26. After passing through the pressure tank 26, each water replenishing pipeline flows out from a water replenishing outlet 1801 with constant pressure of the first-level secondary network, a water replenishing outlet 1802 with constant pressure of the second-level secondary network or a water replenishing outlet 1803 with constant pressure of the third-level secondary network and is respectively connected with inlets (a first-level secondary network inlet 1101, a second-level secondary network inlet 1102 and a third-level secondary network inlet 1103) of cold water pipelines at different levels for constant pressure of inlets.
As shown in fig. 7, in example 3 of the present invention, the undescribed portion is the same as in example 1,
in embodiment 2, the mode that the water-water plate heat exchange water pipeline is connected with the hot side of each stage of water-water plate heat exchange 6 is divided into: a forward series mode;
in embodiment 2, the heat absorption flow through the hot side of each stage of water-water plate heat exchange 6 via the water-water plate heat exchange water pipeline is as follows: hot water entering from a main inlet 8 of the water-water plate heat exchange water pipeline sequentially enters a hot-side inlet of a first-stage water-water plate heat exchanger 601, a hot-side inlet of a second-stage water-water plate heat exchanger 602 and a hot-side inlet of a third-stage water-water plate heat exchanger 603 according to the sequence of evaporation pressure from low to high, and then is discharged from a main outlet 9 of the water-water plate heat exchange water pipeline.
As shown in fig. 8, in example 4 of the present invention, the undescribed portion is the same as in example 1,
in embodiment 4, the connection between the hot side of the water-water plate heat exchange water pipeline and the hot side of each water-water plate heat exchange 6 is divided into: an inverse series mode;
in embodiment 4, the flow of heat absorption through the hot side of each stage of water-water plate heat exchange 6 via the water-water plate heat exchange water pipeline is as follows: hot water entering from a main inlet 8 of the water-water plate heat exchange water pipeline sequentially enters a hot side inlet of a third-stage water-water plate heat exchanger 603, a second-stage water-water plate heat exchanger 602 and a first-stage water-water plate heat exchanger 601 according to the sequence of evaporation pressure from high to low, exchanges heat, and is discharged from a main outlet 9 of the water-water plate heat exchange water pipeline.
As shown in fig. 9, in example 5 of the present invention, the undescribed portion was the same as in example 1,
in example 5, the connection mode of one of the cold water lines connected to the condenser 2 and the absorber 3 is divided into: a parallel connection mode;
in example 6, the flow of heat release entering the absorber 3, the condenser 2 and the water-water plate exchanger 6 in the cold water pipeline is as follows: the water enters from a first-stage secondary net inlet 1101, a second-stage secondary net inlet 1102 and a third-stage secondary net inlet 1103, and is divided into three paths before the inlets of the absorbers 3 at all stages, wherein one path enters a cold-side water inlet of the water plate exchanger 6 at the stage to absorb heat, the other path enters the absorber 3 at the stage to absorb heat, and the last path enters the condenser 2 at the stage to absorb heat; the outlet of the condenser 2, the outlet of the absorber 3 and the cold side water outlet of the water plate exchanger 6 are converged to the partitioned cold water outlets (a first-stage secondary net outlet 1201, a second-stage secondary net outlet 1202 and a third-stage secondary net outlet 1203) of each stage and discharged.
As shown in fig. 10, in example 6 of the present invention, the undescribed portion was the same as in example 1,
in example 6, the connection mode of one of the cold water lines connected to the condenser 2 and the absorber 3 is divided into: the condenser is connected in series at an inlet;
in example 5, the flow of heat release into the absorber 3, the condenser 2 and the water-water plate exchanger 6 in the cold water pipeline is as follows: after entering from a first-stage secondary net inlet 1101, a second-stage secondary net inlet 1102 and a third-stage secondary net inlet 1103, the water enters a cold-side water inlet of the water-plate exchanger 6 in one path before an inlet of the absorber 3 of each stage, and the other path of the water sequentially passes through the condenser 2 and the absorber 3 to absorb heat, and then is converged to a partitioned cold water outlet (a first-stage secondary net outlet 1201, a second-stage secondary net outlet 1202 and a third-stage secondary net outlet 1203) of each stage at an outlet of the absorber 3 and a cold-side water outlet of the water-plate exchanger 6 and is discharged.
Claims (9)
1. A building type absorption heat exchange station capable of realizing district heating is characterized by comprising: the system comprises an absorption heat exchanger (15) for respectively supplying heat to three subareas, a subarea water supplementing constant pressure device (16), a primary network booster pump (20), a 3-level independent secondary network circulating pump (21), a flowmeter (22), a primary network pipeline and a 3-level secondary network pipeline, wherein a primary network inlet (13) is connected with a generator hot water pipeline inlet of the absorption heat exchanger (15) so as to enter a first-level generator (1); an evaporator hot water pipeline outlet of the absorption heat exchanger (15) is divided into two branches, one branch is connected with a subarea water supplementing constant pressure device (16) through a water supplementing inlet (17), and the other branch is sequentially connected with a flowmeter (22) and a primary net booster pump (20) and then connected with a primary net outlet (14) of the equipment;
the secondary net water inlet of each subarea is converged with one water replenishing outlet of the subarea water replenishing constant pressure device (16) and then is connected with the corresponding graded cold water pipeline inlet in the absorption heat exchanger (15), namely the secondary net inlet is the constant pressure point of each grade of secondary net water; the outlet of each stage of cold water pipeline is connected with the corresponding secondary net water outlet;
an absorption heat exchanger (15) for supplying heat to each of the three zones comprises: the system comprises a 3-stage internal independent absorption heat exchange process, a generator hot water pipeline, an evaporator hot water pipeline, a water-water plate heat exchange water pipeline and a 3-stage independent cold water pipeline, wherein the evaporation pressure in each stage of absorption cycle is sequentially increased step by step; the generator hot water pipeline is connected with each stage of generator (1) in the forward direction, and the evaporator hot water pipeline is connected with each stage of evaporator (4) in the reverse direction; an outlet (7) of the generator hot water pipeline is connected with a main inlet (8) of the water-water plate heat exchange water pipeline, and a main outlet (9) of the water-water plate heat exchange water pipeline is connected with an inlet (10) of the evaporator hot water pipeline; the water-water plate heat exchange water pipeline is connected with the hot side of each stage of water-water plate heat exchanger (6); the inlets of all stages of cold water pipelines are divided into two paths, wherein one path is connected with the condenser (2) and the absorber (3), and the other path is connected with the cold side of the water plate exchanger (6).
2. The building type absorption heat exchange station capable of realizing district heating according to claim 1, wherein the mode that the water-water plate heat exchange water pipeline is connected with the hot side of each stage of water-water plate heat exchanger (6) is divided into: the all-parallel mode, the forward series mode and the reverse series mode are three, wherein:
the full parallel mode is as follows: the water-water plate heat exchange water pipeline main inlet (8) is divided into 3 paths, each path is respectively connected with the hot side inlet of each level of water-water plate heat exchange (6), the hot side outlets of each level of water-water plate heat exchange (6) are converged, and then the water-water plate heat exchange water pipeline main outlet (9) is connected;
the forward series mode is as follows: the water-water plate heat exchange water pipeline main inlet (8) sequentially communicates the water-water plates (6) in different levels according to the sequence of evaporation pressure from low to high, and then is connected with the water-water plate heat exchange water pipeline main outlet (9);
the reverse series connection mode is as follows: the water-water plate heat exchange water pipeline main inlet (8) is communicated with the water-water plate heat exchangers (6) in sequence according to the sequence that the evaporation pressure is from high to low, and then is connected with the water-water plate heat exchange water pipeline main outlet (9).
3. The building type absorption heat exchange station capable of realizing district heating according to claim 1, wherein the connection mode of the path in the cold water pipeline connected with the condenser (2) and the absorber (3) is divided into: the parallel connection mode, the series connection mode that the absorber is the entry and the series connection mode that the condenser is the entry are three, wherein:
the parallel connection mode is as follows: the condenser is divided into two parallel branches, one branch is connected with the condenser (2), the other branch is connected with the absorber (3), and the outlets of the two branches are converged;
the absorber is connected in series at the inlet: the absorber (3) and the condenser (2) are connected in sequence;
the series connection mode of the condenser as an inlet is as follows: the condenser (2) and the absorber (3) are connected in sequence.
4. Building type absorption heat exchange station capable of realizing district heating according to claim 1, wherein the district water supplementing constant pressure device (16) comprises: moisturizing entry (17), one or three open water tank (19), moisturizing pump (25), flowmeter (22), pressure switch (28), overhead tank (26), moisturizing export (1801) of first order secondary network constant pressure, moisturizing export (1802) of second order secondary network constant pressure and moisturizing export (1803) of third order secondary network constant pressure, wherein moisturizing entry (17) link to each other with a moisturizing export through one or three open water tank (19) and 3 grades of moisturizing pipeline respectively, be equipped with moisturizing pump (25) on every grade moisturizing pipeline in proper order, flowmeter (22), pressure switch (28) and overhead tank (26).
5. Building type absorption heat exchange station capable of realizing district heating according to claim 4, wherein when the water supplement inlet (17) is connected with a water supplement outlet through an open water tank (19) and a 3-level water supplement pipeline, respectively, the water supplement inlet (17) is connected with the inlet of the open water tank (19) through a water tank water supplement valve (27), the outlet of the open water tank (19) is divided into three-level water supplement pipelines connected in parallel, and the 3-level water supplement pipeline is connected with the water supplement outlet (1801) with a first level secondary network constant pressure, the water supplement outlet (1802) with a second level secondary network constant pressure and the water supplement outlet (1803) with a third level secondary network constant pressure.
6. Building type absorption heat exchange station capable of realizing district heating according to claim 4, wherein when the water supplement inlet (17) is connected with a water supplement outlet through three open water tanks (19) and 3-level water supplement pipelines, the water supplement inlet (17) is divided into three parallel paths, each path is connected with the inlet of one open water tank (19) through a water tank water supplement valve (27), the outlet of the open water tank (19) is connected with a primary water supplement pipeline, and each stage of water supplement pipeline is connected with one of a water supplement outlet (1801) with a first level secondary network constant pressure, a water supplement outlet (1802) with a second level secondary network constant pressure or a water supplement outlet (1803) with a third level secondary network constant pressure.
7. The building type absorption heat exchange station capable of realizing district heating according to claim 1, wherein a pipeline connecting the primary net inlet (13) and the generator hot water pipeline inlet of the building type absorption heat exchanger (15) is provided with a thermometer (23) and a pressure gauge (24); in a branch of an evaporator hot water pipeline outlet of the absorption heat exchanger (15) connected with a primary network outlet (14), a thermometer (23) is arranged on a pipeline in front of the flowmeter (22), and pressure gauges (24) are arranged on pipelines in front of and behind the primary network booster pump (20).
8. Building type absorption heat exchange station capable of realizing district heating according to claim 1, wherein a pressure gauge (24) and a temperature gauge (23) are arranged on a pipeline after a secondary net water inlet of each district and a water replenishing outlet of a district water replenishing constant pressure device (16) are merged.
9. The building type absorption heat exchange station capable of realizing district heating according to claim 1, wherein a thermometer (23), a flowmeter (22), a pressure gauge (24), a secondary network circulating pump (21) and the pressure gauge (24) are sequentially arranged on the pipeline connecting the outlet of each stage of cold water pipeline with the corresponding outlet of secondary network water.
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| CN202010823282.0A CN111964129B (en) | 2020-08-17 | 2020-08-17 | Building type absorption heat exchange station capable of realizing partition heat supply |
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| CN202010823282.0A CN111964129B (en) | 2020-08-17 | 2020-08-17 | Building type absorption heat exchange station capable of realizing partition heat supply |
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| CN111964129B true CN111964129B (en) | 2022-02-22 |
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| KR20140038229A (en) * | 2012-09-20 | 2014-03-28 | 박복용 | Heated mat for boiler with vibration and noise absorption function |
| CN103673032A (en) * | 2013-12-04 | 2014-03-26 | 大连葆光节能空调设备厂 | System capable of greatly lowering combined heat and power generation centralized heating temperature |
| CN106091071B (en) * | 2016-08-16 | 2021-12-03 | 清华大学 | Building type absorption heat exchange station |
| CN209604106U (en) * | 2019-01-25 | 2019-11-08 | 清华大学 | A kind of biomass thermal cogeneration system that can recycle steam exhaust and fume afterheat simultaneously |
| CN109945272A (en) * | 2019-04-25 | 2019-06-28 | 中能服能源科技股份有限公司 | A kind of three area's combining heating system of the big temperature difference based on absorption heat exchange |
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