High-efficiency and easy-to-clean sewage heat exchanger

An easy-to-clean heat exchanger technology, applied to indirect heat exchangers, heat exchanger types, heat exchanger shells, etc., can solve the problems of heat exchanger material corrosion resistance, heat transfer coefficient reduction, and difficult cleaning, etc., to achieve The effect of reducing the cross-sectional area of ​​the flow channel, increasing the heat transfer coefficient, and increasing the flow rate of sewage

Pending Publication Date: 2017-10-17
东莞市康源节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] ZL201120240147.X non-dismantling and cleaning centrifugal sewage heat exchanger, which better solves the problem of dirt clogging, deposition and greatly reduced heat transfer coefficient, but this patent is generally applicable to large sewage systems, and small and medium sewage systems are not suitable for heat exchange. The corrosion resistance of the material of the device is a major problem. The cost of using precious metals is high, and the use of anti-corrosion coatings will reduce the heat transfer coefficient, and the life of the heat exchanger will be greatly affected.
At the same time, the heat that can be recovered depends on the temperature of the cold water side, and lower-grade heat cannot be recovered
[0004] Other types of heat exchangers, such as shell-and-tube heat exchangers, submerged heat exchangers, etc., also have problems such as clogging, deposition, low heat transfer coefficient, and difficult cleaning. The defects are obvious, and a solution is urgently needed

Method used

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  • High-efficiency and easy-to-clean sewage heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Heat exchange pipe waste heat recovery.

[0028] like Figure 1 to Figure 3 As shown, the present invention provides a high-efficiency and easy-to-clean sewage heat exchanger, including a sewage tank 1, the sewage tank 1 includes a box body 11, and at least two flow barriers 12 are arranged side by side in the box body 11. A spacer groove 13 for circulating sewage is formed between the flow strips 12, one end of the flow separation strip 12 is sealed with the inner wall on one side of the box body 11, and the other end of the flow separation strip 12 is connected with the inner wall of the other side of the box body 11. The inner wall is spaced with conduction gaps 14 for communicating with adjacent interval grooves 13, and several interval grooves 13 and conduction gaps 14 form a water flow channel 2 for guiding sewage to flow in a roundabout way; When the heat pipe 3 is in use, the heated sewage flows through the water flow channel 2, and the tap water flowing in the...

Embodiment 2

[0038] Heat exchange pipes and refrigerant pipes compound waste heat recovery.

[0039] like Figure 4 to Figure 5 As shown, the difference between the second embodiment and the first embodiment is that: the refrigerant pipeline 4 used for the heat pump system is laid in the water flow channel 2, and when the heat pump system is working, the refrigerant in the refrigerant pipeline 4 absorbs sewage of heat. Specifically, the circulating refrigerant in the refrigerant pipeline 4 absorbs the heat of the sewage, and the refrigeration pipeline is the evaporator of the heat pump system. After absorbing the heat of the wastewater, the heat is transferred to the condenser to heat tap water or other substances. Both the feed end and the discharge end of the refrigerant pipeline 4 are connected with heat pump refrigerant connectors 41 . In this implementation, the refrigerant pipeline 4 and the heat exchange pipeline 3 are used to perform secondary waste heat recovery on the sewage, s...

Embodiment 3

[0042] Refrigerant pipeline waste heat recovery.

[0043] In this embodiment, a high-efficiency and easy-to-clean sewage heat exchanger is provided, including a sewage tank 1. The sewage tank 1 includes a box body 11, and at least two flow barriers 12 are arranged side by side in the box body 11. A spacer groove 13 for circulating sewage is formed between the flow strips 12, one end of the flow separation strip 12 is sealed with the inner wall on one side of the box body 11, and the other end of the flow separation strip 12 is connected with the inner wall of the other side of the box body 11. There are conduction gaps 14 for communicating with adjacent interval grooves 13 on the inner wall, and several interval grooves 13 and conduction gaps 14 form a water flow channel 2 for guiding the sewage to flow in a roundabout way; The refrigerant pipeline 4, when in use, the sewage with heat flows through the water flow channel 2, and the refrigerant in the refrigerant pipeline 4 abs...

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Abstract

The invention relates to the technical field of sewage waste heat recovery, in particular to a high-efficiency and easy-to-clean sewage heat exchanger. The high-efficiency and easy-to-clean sewage heat exchanger comprises a sewage tank. The sewage tank comprises a tank body and at least two flow-separating strips parallelly arranged in the tank body at intervals, a spacing groove used for circulating sewage is defined between each two adjacent flow-separating strips, and one ends of the flow-separating strips are connected with the inner wall of one side of the tank body in a sealed mode; and conducting gaps used for communicating with the adjacent spacing grooves are formed between the other ends of the flow-separating strips and the inner wall of the other side of the tank box, the multiple spacing grooves and the conducting gaps form a water channel used for guiding the sewage to flow circuitously, and a heat exchanging pipeline used for circulating tap water is laid in the water channel. According to the high-efficiency and easy-to-clean sewage heat exchanger, the circuitous arranged S-shaped water channel is adopted to guide the sewage to flow, and the tap water of the heat exchanging pipeline is adopted to conduct first-grade waste heat recovery on the sewage in the water channel; and a narrow flow channel design is adopted, the sectional area of the flow channel is reduced, the sewage flow speed v is improved, the heat exchanging coefficient is increased, and meanwhile the capability of the sewage taking away dirt is improved.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery from sewage, in particular to an efficient and easy-to-clean sewage heat exchanger. Background technique [0002] The recovery and reuse of low-grade waste fluid energy has always been a research focus in the field of energy conservation. The biggest problem of low-grade waste fluid energy recovery is fouling, deposition, and a significant reduction in heat transfer coefficient. Especially for waste water source heat pump systems where waste fluid energy is recovered, it is even more difficult to clean the heat exchanger. For large-scale high-grade sewage fluid systems, this problem can be solved through filtration and other treatment methods. For small and medium-sized low-grade sewage systems such as aquaculture, filtration and other treatment methods are uneconomical, bulky, and heat loss during treatment. [0003] ZL201120240147.X non-dismantling and cleaning centrifugal sewage he...

Claims

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Application Information

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IPC IPC(8): F28D7/08F28F9/00
CPCF28D7/087F28F9/001
Inventor张加振
Owner东莞市康源节能科技有限公司