Solar auxiliary heat pump sludge drying system

A technology of sludge drying and solar energy, applied in solar heating systems, solar thermal energy, solar thermal power generation, etc., can solve the problems of insufficient heat pump drying application, insufficient single machine capacity, high investment, etc., to achieve convenient heat source control and reduce energy consumption. Consumption, improve the effect of drying efficiency

Active Publication Date: 2015-06-17
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0003] Heat pump drying is a recognized green drying technology, but due to slightly hi

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  • Solar auxiliary heat pump sludge drying system

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Embodiment Construction

[0015] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0016] The sludge drying system of the present invention will be further described in conjunction with specific examples below.

[0017] like figure 1 As shown, the embodiment of the present invention provides a solar-assisted heat pump sludge drying system, which can effectively use solar energy as an auxiliary heat source to dry sludge, including: a drying box 1, a connecting air duct 2, a compressor 3, and a connecting pipeline 4 , high-temperature evaporator 5, solar heat collector 6, circulating water pump 7, control valve 8, ...

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Abstract

The invention discloses a solar auxiliary heat pump sludge drying system which comprises a drying box, a solar heat collector, a heat pump system, a dehumidifier, an air duct system and a control valve, wherein a low-temperature evaporator of the dehumidifier, an air-energy heat exchanger and a high-temperature evaporator are connected in parallel to constitute the heat pump system. The working process comprises the following steps: sludge enters the drying box through a sludge feed port, is uniformly and flatly laid on a conveyer belt of a sludge conveyer drying device, and slowly moves downwards under the driving action of the conveyer belt, wherein the conveyer belt is composed of a stainless steel screen which is flexibly and air-permeable; dry hot air enters the drying box via the bottom of the drying box, heats the sludge and takes away vapor evaporated in the sludge, and wet air is discharged from the top of the drying box, is subjected to moisture content reduction through an evaporator, a condenser and an electric heater, and returns to the drying box to continue drying the sludge; and the sludge moves downwards in the conveyer belt, and the finally dried finished product is collected at the bottom of the drying box.

Description

technical field [0001] The invention relates to the field of sludge drying, in particular to a solar-assisted heat pump sludge drying system. Background technique [0002] The Ministry of Housing and Urban-Rural Development predicts that the amount of sludge that needs to be safely treated and disposed of in cities and towns in my country will reach 31.43 million tons in 2015 according to the target requirements for the treatment rate of sewage discharge during the "Twelfth Five-Year Plan" period. In addition, the rivers and lakes adjacent to cities in my country have been seriously polluted, and the sediment containing high concentrations of heavy metals and toxic organic substances urgently needs to be excavated, dredged and treated. [0003] Heat pump drying is a recognized green drying technology, but due to a slightly high investment and insufficient stand-alone capacity, heat pump drying is not widely used. In the future, with the increasing requirements for energy co...

Claims

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Application Information

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IPC IPC(8): C02F11/12C02F11/18B01D53/26F25B30/06F24J2/00
CPCY02E10/40Y02W10/37C02F11/16B01D53/265C02F11/18F24S20/40F24S2023/88F25B30/06
Inventor 吴小华周淼任静浩吴立志张璟
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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