Steam heat exchange unit

Abstract

The utility model relates to a steam heat exchange unit which comprises a displacement heat exchanger, a control cabinet, a first-network steam supply system and a second-network circulating water system. The displacement heat exchanger is connected with a first-network steam supply system and a second-network circulating water system, and steam heat in the first-network steam supply system is transmitted to circulating water in the second-network circulating water system in the displacement heat exchanger; the displacement heat exchanger, the first-network steam supply system and the second-network circulating water system are all connected to the control cabinet. The displacement heat exchanger is provided with a temperature sensor and a pressure sensor, and the temperature sensor and the pressure sensor are both connected to the control cabinet. The steam heat exchange unit further comprises a water supplementing module, and the water supplementing module is connected to the two-network circulating water system and used for supplementing water to the two-network circulating water system and maintaining the pressure of the two-network circulating water system to be constant. The flexibility of on-site installation of the heat exchange unit is improved, and all the modules can be installed in a split or integrated mode according to on-site conditions of a heat exchange station building. The mechanical and electrical integration design is adopted, and the unit occupied area is reduced; and operation of two functions of domestic hot water and heat supply or operation of one of the functions can be realized.

Description

Technical Field

[0001] The utility model relates to a heat exchange unit, in particular to a steam heat exchange unit which improves the integration of the heat exchange unit and reduces the space occupied, has a wide adaptability and meets the requirements of different station buildings. Background Art

[0002] In many construction projects, the heating unit has been required to have multiple functions. For example, a heat exchange unit that can operate heating and domestic hot water simultaneously or separately. Especially when steam is used as the heat source medium, most manufacturers will provide two sets of equipment to customers, which is inconvenient to use, and the procurement cost and failure rate of the two sets of equipment will be high. Utility Model Content

[0003] In view of the above problems, the main purpose of the utility model is to provide a steam heat exchanger unit which improves the integration of the heat exchanger unit and reduces the space occupied, has a wide range of adaptability and meets the requirements of different station buildings.

[0004] The utility model solves the above technical problems through the following technical solutions: a steam heat exchanger unit, which includes: a volumetric heat exchanger, a control cabinet, a first-network steam supply system, and a second-network circulating water system; the volumetric heat exchanger is connected to the first-network steam supply system and the second-network circulating water system, and the steam heat in the first-network steam supply system is transferred to the circulating water in the second-network circulating water system in the volumetric heat exchanger; the volumetric heat exchanger, the first-network steam supply system, and the second-network circulating water system are all connected to the control cabinet; a temperature sensor and a pressure sensor are arranged on the volumetric heat exchanger, and the temperature sensor and the pressure sensor are both connected to the control cabinet.

[0005] In a specific implementation example of the present utility model, the steam heat exchanger unit also includes a water replenishment module, which is connected to the secondary network circulating water system. The water replenishment module is a module for replenishing water to the secondary network circulating water system and maintaining a constant pressure in the secondary network circulating water system.

[0006] In a specific implementation example of the utility model, a steam supply system includes a water supply pipeline, a return pipeline, a filter, a trap group, and a shut-off valve. The shut-off valve is installed on the water supply pipeline. A trap group is provided at the inlet of the network. The trap group includes a small trap and a large trap arranged in parallel. The filter is arranged on the water supply pipeline at the inlet of the network.

[0007] In a specific implementation example of the utility model, the two-network circulating water system includes a two-network water supply pipeline and a two-network return water pipeline. The two-network water supply pipeline and the two-network return water pipeline are both provided with thermometers and flow meters. The two-network return water pipeline is also provided with a circulating water pump, a frequency converter, a check valve, an inlet shut-off valve, an outlet shut-off valve, and a pressure relief solenoid valve. The circulating water pump is frequency-controlled according to the difference of the pressure sensor arranged on the two-network supply and return water main pipe to ensure the normal constant pressure or heating at the most unfavorable end of the two networks; the pressure solenoid valve and the safety valve are installed at the two-network return water main pipe to prevent the system from overpressure.

[0008] In a specific implementation example of the utility model, the two-network circulating water pump and the two-network frequency converter are integrated into one.

[0009] In a specific implementation example of the utility model, the one-net steam supply system also includes a one-net filter for filtering impurities in the one-net steam, and the one-net filter is installed at the steam inlet end of the one-net steam supply system.

[0010] In a specific implementation example of the utility model, the water supply pipeline includes a water supply pump, a frequency converter, a water supply solenoid valve, a check valve, a ball valve, a pipeline and a base. When the heating function is started, the water supply module is started, and the water supply pump and the solenoid valve are started and stopped and frequency-controlled according to the pressure value of the secondary network return water main pipe to replenish the water loss of the system due to running, bubbling, leaking and dripping, and maintain the constant pressure of the secondary network water system; when only the domestic hot water function is used, the solenoid valve is closed and the water supply module function is closed.

[0011] In a specific implementation example of the utility model, the water supply pump and the frequency converter are integrated together.

[0012] The positive progressive effect of the utility model is that the steam heat exchanger unit provided by the utility model has the following advantages compared with the common technology: a network pipeline control system, a network circulation pump group module and a water supply module are connected through pipelines, realizing a modular integrated design of the heat exchanger unit, which greatly reduces the occupied space while meeting the different needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 for Figure 1 Enlarged view of point A.

[0015] Figure 3 for Figure 1 This is an enlarged view of point B.

[0016] The following are the names corresponding to the label numbers in this utility model:

[0017] Volumetric heat exchanger 12, control cabinet 23, temperature sensor 21, pressure sensor 22, primary water supply pipeline 15, primary water return pipeline 16, primary filter 19, shut-off valve 17, steam trap group 18, small steam trap 18-1, large steam trap 18-2, secondary water supply pipeline 1, secondary water return pipeline 2, circulating water pump 6, check valve 6-1, inlet shut-off valve 6-2, outlet shut-off valve 6-3, inverter 6-4; water supply pipeline 7, water supply pump 10, inverter 10-1, water supply solenoid valve 24, check valve 9, ball valve 8. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model. Figure 2 for Figure 1 A magnified image of Figure 3 for Figure 1 This is an enlarged view of point B. Figure 1-3 As shown: The utility model proposes a steam heat exchanger unit, which includes: a volumetric heat exchanger 12, a control cabinet 23, a primary steam supply system, and a secondary circulating water system; the volumetric heat exchanger 12 is connected to the primary steam supply system and the secondary circulating water system, and the steam heat in the primary steam supply system is transferred to the circulating water in the secondary circulating water system in the volumetric heat exchanger 12; the volumetric heat exchanger 12, the primary steam supply system, and the secondary circulating water system are all connected to the control cabinet 23; a temperature sensor 21 and a pressure sensor 22 are provided on the volumetric heat exchanger 12, and the temperature sensor 21 and the pressure sensor 22 are both connected to the control cabinet 23.

[0020] The steam heat exchange unit also includes a water replenishment module, which is connected to the secondary network circulating water system. The water replenishment module is a module for replenishing water to the secondary network circulating water system and maintaining a constant pressure in the secondary network circulating water system.

[0021] The one-network steam supply system in the utility model comprises a one-network water supply pipeline 15, a one-network return pipeline 16, a one-network filter 19, a steam trap group 18, and a shut-off valve 17. The shut-off valve 17 is installed on the one-network water supply pipeline 15. A steam trap group is provided at the inlet of the one-network. The steam trap group comprises a small steam trap 18-1 and a large steam trap 18-2 arranged in parallel. The one-network filter 19 is arranged on the one-network water supply pipeline 15 at the inlet of the one-network.

[0022] The two-network circulating water system in the utility model includes a two-network water supply pipeline 1 and a two-network return water pipeline 2. The two-network water supply pipeline 1 and the two-network return water pipeline 2 are both provided with thermometers and flow meters. The two-network return water pipeline 2 is also provided with a circulating water pump 6, a frequency converter 6-4, a check valve 6-1, an inlet shut-off valve 6-2, an outlet shut-off valve 6-3, and a pressure relief solenoid valve. The circulating water pump is frequency-controlled according to the difference of the pressure sensor provided on the two-network supply and return water main pipe to ensure the normal constant pressure or heating at the most unfavorable end of the two networks; the pressure solenoid valve and the safety valve are installed at the two-network return water main pipe to prevent the system from overpressure. The two-network circulating water pump 6 and the two-network frequency converter 6-4 in the utility model are integrated into one.

[0023] The water supply pipeline 7 in the utility model includes a water supply pump 10, a frequency converter 10-1, a water supply solenoid valve 24, a check valve 9, a ball valve 8, etc. When the heating function is started, the water supply module is started, and the water supply pump 10 and the solenoid valve 24 are started and stopped and frequency-controlled according to the pressure value of the secondary network return water main pipe to replenish the water loss of the system due to running, bubbling, leaking, and dripping, and maintain the constant pressure of the secondary network water system; when only the domestic hot water function is used, the solenoid valve is closed, the water supply module function is closed, and the water supply pump 10 and the frequency converter 10-1 are integrated together.

[0024] The one-net steam supply system in the utility model further comprises a one-net filter 19 for filtering out impurities in the one-net steam. The one-net filter 19 is installed at the steam inlet end of the one-net steam supply system.

[0025] The filter is used to filter out impurities in the steam of the network to prevent the heat exchanger from being blocked. Shut-off valves are set at the main inlet and outlet of the pipeline and the inlet and outlet of the heat exchanger to facilitate the maintenance of the unit. The steam trap group of the water supply pipeline of the network discharges the condensed water in the steam pipeline in a centralized manner. The frequency conversion control is performed according to the difference between the temperature sensor and the pressure sensor set on the main water supply and return pipe of the network to ensure the stable output of heat from the network.

[0026] The circulating water pump in the secondary network circulating water system is frequency-controlled according to the difference of the pressure sensor installed on the secondary network water supply and return main pipe to ensure the normal constant pressure or heating at the most unfavorable end of the secondary network. The pressure relief solenoid valve and safety valve are installed at the secondary network water return main pipe to prevent system overpressure.

[0027] When the heating function is started, the water supply module is started, and the water supply pump and solenoid valve are started and stopped and frequency-controlled according to the pressure value of the secondary network return main pipe to replenish the water loss due to leakage, dripping, and maintain the pressure of the secondary network water system constant. When only the domestic hot water function is used, the solenoid valve is closed and the water supply module function is closed.

[0028] The heat exchange module in the utility model is integrated with two network flow meters, which can adjust the water supply flow of the first network by changing the operation of the circulation pump group module of the first network, thereby stably adjusting the water supply temperature of the second network. The instantaneous heat and cumulative heat of the first network, the instantaneous flow and cumulative flow of the second network can be collected and uploaded in real time.

[0029] The steam trap group in the utility model adopts a large and small double steam trap structure, which is convenient for timely discharge of condensed water when the flow rate of condensed water in the pipeline changes. It avoids the steam in the pipeline being discharged when the steam trap is too large, or the condensed water cannot be discharged in time when the steam trap is too small, causing water hammer.

[0030] The water supply pump of the water supply module in the utility model adopts full frequency conversion control, is connected to the solenoid valve at the outlet of the water supply pump pipeline, the water supply pump and the frequency converter adopt an integrated design, and the frequency converter is installed on the water supply pump motor to reduce the area occupied by the unit control cabinet.

[0031] When the heating function is turned on, the first network opens the small steam trap in the steam trap group and the electromagnetic valve of the water supply system at the same time, which ensures that the steam of the first network does not leak and the operating pressure of the second network is stable, thereby ensuring the safe and efficient operation of the whole system. When only the domestic hot water function is turned on, the first network opens the large steam trap in the steam trap group and closes the electromagnetic valve of the water supply system at the same time to ensure the domestic hot water temperature of the second network.

[0032] When the heating function is started, the water supply pipe trap valve group of the network opens the small trap valve 18-1 to discharge the condensed water in the steam pipe in a centralized manner, and performs frequency conversion control according to the difference between the temperature sensor and the pressure sensor installed on the water supply and return main pipe of the network, so as to ensure the stable output of heat in the network. When only the domestic hot water function is started, the water supply pipe trap valve group of the network opens the large trap valve 18-2 to discharge the condensed water in the steam pipe in a centralized manner, and performs frequency conversion control according to the temperature sensor 21 and the pressure sensor 22 installed on the volumetric heat exchanger 12, so as to ensure the stable output of heat in the network and no water accumulation in the steam pipe.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A steam heat exchange unit, characterized in that: The steam heat exchange unit comprises: a volumetric heat exchanger, a control cabinet, a primary steam supply system, and a secondary circulating water system; the volumetric heat exchanger is connected to the primary steam supply system and the secondary circulating water system, and the steam heat in the primary steam supply system is transferred to the circulating water in the secondary circulating water system in the volumetric heat exchanger; the volumetric heat exchanger, the primary steam supply system, and the secondary circulating water system are all connected to the control cabinet; a temperature sensor and a pressure sensor are provided on the volumetric heat exchanger, and the temperature sensor and the pressure sensor are both connected to the control cabinet.

2. The steam heat exchange unit according to claim 1, characterized in that: The steam heat exchanger unit also includes a water replenishment module, which is connected to the secondary network circulating water system. The water replenishment module is a module for replenishing water to the secondary network circulating water system and maintaining a constant pressure in the secondary network circulating water system.

3. The steam heat exchange unit according to claim 1, characterized in that: A network steam supply system includes a network water supply pipeline, a network return pipeline, a network filter, a steam trap group, and a shut-off valve. The shut-off valve is installed on the network water supply pipeline. A steam trap group is provided at the inlet of the network. The steam trap group includes a small steam trap and a large steam trap arranged in parallel. The network filter is arranged on the water supply pipeline of the network at the inlet of the network.

4. The steam heat exchange unit according to claim 1, characterized in that: The secondary network circulating water system includes the secondary network water supply pipeline and the secondary network return pipeline. The secondary network water supply pipeline and the secondary network return pipeline are both equipped with thermometers and flow meters. The secondary network return pipeline is also equipped with a circulating water pump, a frequency converter, a check valve, an inlet shut-off valve, an outlet shut-off valve, and a pressure relief solenoid valve. The circulating water pump is frequency-controlled according to the difference of the pressure sensor installed on the secondary network supply and return water main pipe; the pressure solenoid valve and the safety valve are installed at the secondary network return water main pipe.

5. The steam heat exchange unit according to claim 4, characterized in that: The two-network circulating water pump and the two-network inverter are integrated into one.

6. The steam heat exchange unit according to claim 1, characterized in that: The one-net steam supply system also includes a one-net filter for filtering out impurities in the one-net steam, and the one-net filter is installed at the steam inlet end of the one-net steam supply system.

7. The steam heat exchange unit according to claim 1, characterized in that: The water supply pipeline includes a water supply pump, a frequency converter, a water supply solenoid valve, a check valve, a ball valve, a pipeline and a base.

8. The steam heat exchange unit according to claim 7, characterized in that: The make-up water pump and the frequency converter are integrated together.

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