High-temperature cooling water waste heat recovery system

Abstract

The utility model discloses a high-temperature cooling water waste heat recovery system which comprises an air conditioner heating unit, a cold water tank, a steam water heat exchange device, a water-water heat exchange device and a hot water tank. A water outlet of the cold water tank is connected with cold water inlets of the steam-water heat exchange device and the water-water heat exchange device through pipelines, hot water outlets of the steam-water heat exchange device and the water-water heat exchange device are connected with a water inlet of the hot water tank through pipelines, and a water outlet of the hot water tank is connected to a hot water inlet of the air conditioner heating unit through a pipeline. According to the system, high-temperature cooling water is fully utilized, drained water of the air conditioner heating unit and external drained water generated by each heat exchange device are recycled, about 40% of energy consumption and nearly 50% of water can be saved in the actual operation of the air conditioner heating unit, and the energy-saving and environment-friendly level of an enterprise in the actual production process is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of waste heat recovery, specifically relates to a system of waste heat recovery of high temperature cooling water in the factory with air conditioning heating unit. BACKGROUND

[0002] When the air conditioning heating unit is in the factory, the air conditioning heating unit generally needs to run uninterruptedly for 24 hours, wherein 55 DEG C or so hot water needs to be provided as a heat medium without stop, and 40 DEG C or so external discharge cold water is produced continuously. If the heat medium adopts the saturated industrial steam provided by the municipal external delivery, a large amount of waste will be produced, and the external discharge cold water is usually directly discharged into the water treatment pipeline, not only generates treatment pressure for the subsequent water treatment, but also brings a large amount of water waste, especially in summer when water supply is tight, the waste will be more significant. In industrial production, 80 DEG C or so cooling water is usually produced, which is usually directly discharged, not only a large amount of water is wasted, but also adverse effects are caused to the external environment. SUMMARY

[0003] The utility model aims at providing a high temperature cooling water waste heat recovery system applicable to the air conditioning heating unit on the basis of prior art.

[0004] The technical scheme of the utility model is:

[0005] A high temperature cooling water waste heat recovery system, which comprises an air conditioning heating unit, a cold water tank, a steam water heat exchange device, a water water heat exchange device and a hot water tank, the cold water discharge port of the air conditioning heating unit is connected with the water inlet of the cold water tank through a pipeline, the water outlet of the cold water tank is connected with the cold water inlets of the steam water heat exchange device and the water water heat exchange device through a pipeline, the hot water discharge ports of the steam water heat exchange device and the water water heat exchange device are connected with the water inlets of the hot water tank through a pipeline respectively, and the water outlet of the hot water tank is connected with the hot water inlet of the air conditioning heating unit through a pipeline;165-175 DEG C saturated industrial steam inlets are arranged on the steam water heat exchange device, and 75-85 DEG C high temperature cooling water inlets are arranged on the water water heat exchange device.

[0006] In one scheme, the cold water tank can be filled with 38-42 DEG C air conditioning discharge water discharged from the cold water discharge port of the air conditioning heating unit.

[0007] In one scheme, a cold water pump is arranged on the pipeline between the water outlet of the cold water tank and the cold water inlets of the steam water heat exchange device and the water water heat exchange device.

[0008] In one scheme, a condensate discharge port and a condensate discharge pipe are arranged on the steam water heat exchange device, and a heat-exchanged water discharge port is arranged on the water water heat exchange device.

[0009] In one embodiment, the hot water tank may contain 53-57°C air conditioning and heating water obtained from the steam-water heat exchanger or water-water heat exchanger.

[0010] In one embodiment, a hot water pump is installed on the pipeline between the outlet of the hot water tank and the hot water inlet of the air conditioning heating unit.

[0011] In one embodiment, the condensate drain pipe of the steam-water heat exchanger is connected to the inlet of the cold water tank, and the outlet of the water-water heat exchanger after heat exchange is connected to the inlet of the cold water tank through a pipeline.

[0012] The beneficial effects of this utility model are:

[0013] This utility model's high-temperature cooling water waste heat recovery system makes full use of the high-temperature cooling water of about 80°C that is usually directly discharged. It also uses municipal saturated industrial steam as a backup, and simultaneously recycles the drainage from the air conditioning and heating units as well as the external drainage generated by various heat exchange devices. In the actual operation of the air conditioning and heating units, it can save about 40% of energy consumption and nearly 50% of water consumption, thereby improving the energy-saving and environmental protection level of enterprises in the actual production process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] In the diagram, 1-Air conditioning and heating unit, 2-Cold water tank, 3-Steam-water heat exchanger, 4-Water-water heat exchanger, 5-Hot water tank, 6-Cold water pump, 7-Hot water pump, 11-Saturated industrial steam inlet, 12-High temperature cooling water inlet, 13-Condensate drain pipe, 14-Water outlet after heat exchange. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, but the scope of protection of the present invention is not limited to the following examples.

[0017] like Figure 1 As shown, this high-temperature cooling water waste heat recovery system includes an air conditioning and heating unit, a cold water tank, a steam-water heat exchanger, a water-to-water heat exchanger, and a hot water tank. The air conditioning and heating unit has a cold water discharge outlet and a hot water inlet. When the unit is running, approximately 55°C air conditioning and heating water is introduced at the hot water inlet as the heat medium, while approximately 40°C air conditioning discharge water is generated at the cold water discharge outlet.

[0018] The cold water discharge port of the air conditioning heating unit is connected to the water inlet of the cold water tank through a pipeline. The cold water tank can contain about 40℃ air conditioning discharge water discharged from the cold water discharge port of the air conditioning heating unit. The water outlet of the cold water tank is connected to the cold water inlet of the steam-water heat exchange device and the water-water heat exchange device through a pipeline. The hot water discharge ports of the steam-water heat exchange device and the water-water heat exchange device are respectively connected to the water inlets of the hot water tank through pipelines.

[0019] The steam-water heat exchange device is provided with a saturated industrial steam inlet of about 170℃. The heat of the saturated industrial steam can be exchanged to the air conditioning discharge water in the steam-water heat exchange device, so that the air conditioning discharge water is converted into a heating medium for air conditioning. The hot water of about 55℃ generated by the steam-water heat exchange device is introduced into the hot water tank.

[0020] The water-water heat exchange device is provided with a high-temperature cooling water inlet of about 80℃. The high-temperature cooling water can be exchanged to the air conditioning discharge water in the water-water heat exchange device, so that the air conditioning discharge water is converted into a heating medium for air conditioning. The hot water of about 55℃ generated by the water-water heat exchange device is introduced into the hot water tank.

[0021] A cold water pump and a regulating switch are arranged on the pipeline between the water outlet of the cold water tank and the cold water inlets of the steam-water heat exchange device and the water-water heat exchange device. The steam-water heat exchange device and the water-water heat exchange device are adjusted in time through the cold water pump and the regulating switch. When a large amount of high-temperature cooling water is generated, the steam-water heat exchange device can be closed. When the amount of high-temperature cooling water is insufficient, the steam-water heat exchange device can be opened in time, so as to ensure that the heating medium of the air conditioning heating unit can be stably generated.

[0022] The hot water tank can contain about 55℃ air conditioning heating water obtained by heat exchange from the steam-water heat exchange device or the water-water heat exchange device. The water outlet of the hot water tank is connected to the hot water inlet of the air conditioning heating unit through a pipeline. A hot water pump is arranged on the pipeline between the water outlet of the hot water tank and the hot water inlet of the air conditioning heating unit.

[0023] The steam-water heat exchange device is provided with a condensate discharge port and a condensate discharge pipeline. In one scheme, the condensate discharge pipeline of the steam-water heat exchange device can be connected to the water inlet of the cold water tank, so as to form a water recycling. The water-water heat exchange device is provided with a post-exchange water discharge port. In one scheme, the post-exchange water discharge port of the water-water heat exchange device can be connected to the water inlet of the cold water tank through a pipeline, so as to form a water recycling.

[0024] When the system is running, the air conditioning heating unit will produce about 40℃ air conditioning discharge water at the cold water discharge port, which is introduced into the cold water tank. When there is a large amount of about 80℃ high-temperature cooling water, open the water-water heat exchange device and introduce the air conditioning discharge water to produce about 55℃ hot water which is introduced into the hot water tank; when the amount of high-temperature cooling water is not enough, the steam-water heat exchange device can be opened in time to produce about 55℃ hot water through about 170℃ saturated industrial steam which is introduced into the hot water tank. The cold water produced by the water-water heat exchange device and the steam-water heat exchange device after heat exchange can be circulated and used in the cold water tank. Finally, the about 55℃ air conditioning heating water in the hot water tank is introduced into the air conditioning heating unit.

[0025] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A high-temperature cooling water waste heat recovery system, characterized in that... The system includes an air conditioning and heating unit, a cold water tank, a steam-water heat exchanger, a water-to-water heat exchanger, and a hot water tank. The cold water outlet of the air conditioning and heating unit is connected to the inlet of the cold water tank via a pipeline. The outlet of the cold water tank is connected to the cold water inlets of the steam-water heat exchanger and the water-to-water heat exchanger via pipelines. The hot water outlets of the steam-water heat exchanger and the water-to-water heat exchanger are respectively connected to the inlet of the hot water tank via pipelines. The outlet of the hot water tank is connected to the hot water inlet of the air conditioning and heating unit via a pipeline. The steam-water heat exchanger is equipped with a 165-175℃ saturated industrial steam inlet, and the water-to-water heat exchanger is equipped with a 75-85℃ high-temperature cooling water inlet.

2. The high-temperature cooling water waste heat recovery system according to claim 1, characterized in that... The cold water tank may contain 38-42℃ air conditioning wastewater discharged from the cold water outlet of the air conditioning heating unit.

3. The high-temperature cooling water waste heat recovery system according to claim 1, characterized in that... A cold water pump is installed on the pipeline between the outlet of the cold water tank and the cold water inlet of the steam-water heat exchanger and the water-water heat exchanger.

4. The high-temperature cooling water waste heat recovery system according to claim 1, characterized in that... The steam-water heat exchanger is equipped with a condensate drain outlet and a condensate drain pipe; the water-water heat exchanger is equipped with a water outlet after heat exchange.

5. The high-temperature cooling water waste heat recovery system according to claim 1, characterized in that... The hot water tank may contain 53-57°C air conditioning and heating water obtained from the steam-water heat exchanger or water-water heat exchanger.

6. The high-temperature cooling water waste heat recovery system according to claim 1, characterized in that... A hot water pump is installed on the pipeline between the outlet of the hot water tank and the hot water inlet of the air conditioning heating unit.

7. The high-temperature cooling water waste heat recovery system according to claim 4, characterized in that... The condensate drain pipe of the steam-water heat exchanger is connected to the inlet of the cold water tank, and the outlet of the water-water heat exchanger after heat exchange is connected to the inlet of the cold water tank through a pipeline.

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