Low-carbon energy system of sewage plant

Abstract

The utility model discloses a low-carbon energy system of a sewage plant, which comprises a solar power generation device arranged on a roof or a pool top in the sewage plant, and the power output end of the solar power generation device is electrically connected with an electrochemical energy storage device and plant electric equipment respectively; the electrochemical energy storage device is arranged on an open space at a substation in the sewage plant, and the power output end of the electrochemical energy storage device is electrically connected with the plant electric equipment; the waste heat recovery pump set is provided with an electric power input end, a dirty hot water input end and a hot water supply output end, the electric power input end is electrically connected with the electric power output end of the solar power generation device and the electric power output end of the electrochemical energy storage device, and the hot water input end is connected with a drainage pipe of a sewage plant. The hot water supply output end is connected with plant area air conditioning equipment, a plant area radiator and plant area domestic hot water equipment of the sewage plant. The system is simple in equipment structure and short in technological process, self-supply of green energy in a factory is achieved, and the purposes of saving energy and reducing carbon are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy conservation and environmental protection, and in particular to a renewable environmentally friendly energy system. Background Art

[0002] The existing large-scale sewage treatment plants are mainly equipped with electrical equipment such as fans, water pumps, screen machines, and mixers. Their energy supply is mainly coal-fired electricity, which is also the main energy consumption in sewage treatment plants. Coal-fired electricity generates electricity through the combustion of traditional resource coal, which will produce a large amount of carbon dioxide emissions in the production process. Since this part of carbon emissions belongs to the user, the carbon emissions recognized by the sewage treatment plant are relatively high, making the sewage treatment plant a high-carbon emission enterprise, which does not meet the requirements of the existing carbon neutrality goals. Therefore, how to change the energy structure in the sewage treatment plant to achieve the goal of carbon reduction is an urgent problem that sewage treatment plants need to solve.

[0003] In view of this, the present utility model is proposed. Summary of the invention

[0004] The purpose of the utility model is to provide a low-carbon energy system for a sewage treatment plant, which can effectively utilize renewable energy to meet the energy needs of the sewage treatment plant, while effectively reducing the problem of high carbon emissions caused by energy use in the sewage treatment plant, thereby solving the above-mentioned technical problems existing in the prior art.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A low-carbon energy system for a sewage treatment plant, comprising:

[0007] Solar power generation devices, electrochemical energy storage devices, plant electrical equipment, waste heat recovery pump sets, plant radiators or geothermal coils and plant air conditioning equipment; among which,

[0008] The solar power generation device is arranged on the roof or pool top of the sewage treatment plant, and its power output end is electrically connected to the electrochemical energy storage device and the power equipment in the plant area respectively;

[0009] The electrochemical energy storage device is arranged on an open space at a transformer substation in the sewage treatment plant, and its power output end is electrically connected to the electrical equipment in the plant area;

[0010] The waste heat recovery pump group is respectively provided with an electric power input end, a waste hot water input end and a hot water supply output end. The electric power input end is respectively electrically connected to the electric power output end of the solar power generation device and the electric power output end of the electrochemical energy storage device, the hot water input end is connected to the drainage pipe of the sewage treatment plant, and the hot water supply output end is respectively connected to the plant air conditioning equipment, the plant radiator or geothermal coil and the plant domestic hot water equipment of the sewage treatment plant.

[0011] Compared with the prior art, the low-carbon energy system for sewage treatment plants provided by the utility model has the following beneficial effects:

[0012] By setting up a solar power generation device, an electrochemical energy storage device and a waste heat recovery pump group, the equipment has a simple structure and a short process flow, which can realize self-sufficiency in green energy supply within the factory and achieve the goal of energy saving and carbon reduction. Since it adopts renewable energy supply, utilizes the existing roof and pool top, and the unit occupies a small area, it eliminates the boiler and boiler room, saving space; there is no pollution, no combustion, no smoke, and no waste during operation, and no need for a site to stack fuel waste, while avoiding thermal pollution caused by hot sewage discharge; solar energy and energy storage devices do not require special maintenance, and the waste heat recovery pump group has a high energy efficiency ratio, reducing the operating cost of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic diagram of the composition of a low-carbon energy system for a sewage treatment plant provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments, which does not constitute a limitation of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0016] First, the terms that may be used in this article are explained as follows:

[0017] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0018] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0019] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0020] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0021] The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of this document.

[0022] The scheme provided by the utility model is described in detail below. The contents not described in detail in the embodiments of the utility model belong to the prior art known to professional and technical personnel in the field. If no specific conditions are specified in the embodiments of the utility model, the conditions are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturers of the reagents or instruments used in the embodiments of the utility model are not specified, they are all conventional products that can be purchased commercially.

[0023] like Figure 1As shown, the embodiment of the utility model provides a low-carbon energy system for a sewage treatment plant, which is a clean green energy system with a simple process, including:

[0024] Solar power generation device 1, electrochemical energy storage device 2, plant electrical equipment 3, waste heat recovery pump group 4, plant radiator 5 and plant air conditioning equipment 6; among which,

[0025] The solar power generation device 1 is arranged on the roof or pool top of the sewage treatment plant, and its power output end is electrically connected to the electrochemical energy storage device 2 and the power equipment 3 in the plant area respectively;

[0026] The electrochemical energy storage device is arranged on an open space at a transformer substation in the sewage treatment plant, and its power output end is electrically connected to the electrical equipment in the plant area;

[0027] The waste heat recovery pump group 4 is respectively provided with an electric power input end, a waste hot water input end and a hot water supply output end. The electric power input end is respectively electrically connected to the electric power output end of the solar power generation device 1 and the electric power output end of the electrochemical energy storage device 2, the hot water input end is connected to the drainage pipe of the sewage treatment plant, and the hot water supply output end is respectively connected to the plant air conditioning equipment 6, the plant radiator or geothermal coil 5 and the plant domestic hot water equipment of the sewage treatment plant.

[0028] Preferably, in the above energy system, the solar power generation device 1 adopts a distributed photovoltaic power generation device.

[0029] Preferably, in the above energy system, the electrochemical energy storage device 2 uses a lithium iron phosphate battery. This lithium iron phosphate battery has a built-in 280Ah battery cell, and the number of batteries with a specific capacity can be configured according to the power consumption of the water plant.

[0030] Preferably, in the above energy system, the waste heat recovery pump group 4 adopts an ultra-low pressure driven sewage source heat pump. The actual operating parameters of the sewage source heat pump can be determined according to actual needs.

[0031] The energy system of the utility model can replace the existing power source of large sewage treatment plants, use purchased electricity as auxiliary backup, rely on renewable power systems (solar photovoltaic technology and electrochemical energy storage technology) and sewage waste heat collection and utilization devices to form an energy system within the plant to provide power, heating and cooling for the plant area.

[0032] The solar photovoltaic device and electrochemical energy storage device in this energy system form a power system. The solar photovoltaic device is placed on the roof or pool top of the factory, and receives external solar energy and converts it into electrical energy, which can be used immediately during the day; the electrochemical energy storage device is mainly used to store surplus electricity from photovoltaic power generation for use in production equipment at night; the electrochemical energy storage device is placed in an open space near the factory substation.

[0033] In winter, the waste heat recovery pump group utilizes the low-grade wastewater heat in the factory area and converts it into high-temperature heat energy through the sewage source heat pump to supply the factory area for winter heating. The excess heat energy can also be supplied to the residents of the nearby community and can also provide bathing water for the factory employees. In summer, the operation mode can be changed to cool down to meet the living needs of the factory offices and dormitories.

[0034] In summary, the energy system of the present invention has at least the following advantages:

[0035] (1) The equipment structure is simple and the process flow is short;

[0036] (2) Achieve self-sufficiency in green energy supply within the plant to achieve energy conservation and carbon reduction;

[0037] (3) Adopt renewable energy supply, utilize existing roofs and pool tops, and the unit occupies a small area, eliminating the need for boilers and boiler rooms, thus saving space;

[0038] (4) There is no pollution during operation, no combustion, no smoke, no waste, no need for a site to store fuel waste, and avoids thermal pollution caused by hot sewage discharge;

[0039] (5) The photovoltaic and energy storage devices do not require special maintenance, and the waste heat recovery pump group has a high energy efficiency ratio, which reduces the operating cost of the entire system.

[0040] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the solution provided by the embodiments of the present invention is described in detail with specific embodiments below. Example

[0041] like Figure 1 As shown, this embodiment provides a low-carbon energy system for a sewage treatment plant, which includes: a solar power generation device 1, an electrochemical energy storage device 2, plant electrical equipment 3, a waste heat recovery pump group 4, a plant radiator or geothermal coil 5 and a plant air-conditioning equipment 6, which can replace the existing power source of a large sewage treatment plant, mainly an energy system, with purchased electricity as auxiliary standby, relying on a renewable power system (solar photovoltaic technology and electrochemical energy storage technology) and a sewage waste heat collection and utilization device to form an energy system within the plant to provide power, heating and cooling for the plant.

[0042] The solar power generation device 1 generates electrical energy using renewable energy solar energy. In the present embodiment, the solar power generation device 1 is a distributed photovoltaic power generation device, which is connected to a dedicated bracket and fixed on the roof of the factory office building or the top of the factory pool through fixed facilities. During the day, the electric energy of the solar power generation device 1 is transmitted to the factory power equipment 3 through a transmission line to meet the needs of domestic electricity and production electricity in the factory. At the same time, the excess electricity is transmitted through the transmission line and stored in the electrochemical energy storage device 2. At night, the solar power generation device 1 stops generating electricity, and the electricity in the electrochemical energy storage device 2 is transmitted to the factory power equipment 3 through a dedicated transmission line to meet the needs of domestic electricity and production electricity in the factory.

[0043] In winter, the waste heat recovery pump group 4 converts low-grade heat from the sewage treatment plant into high-grade heat, which is transported to the plant radiator 5 (which can be a geothermal coil) in the plant living and office area through the heat transmission pipeline to meet the heating needs of the plant life and provide hot water for bathing; in summer, the waste heat recovery pump group 4 changes the operation mode to provide cooling to the plant air conditioning equipment 6. The waste heat recovery pump group 4 can be driven by the power supply of the plant solar power generation device 1 or the electrochemical energy storage device 2.

[0044] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the utility model, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A low-carbon energy system for a sewage treatment plant, characterized in that: include: A solar power generation device (1), an electrochemical energy storage device (2), a plant electrical equipment (3), a waste heat recovery pump set (4), a plant radiator (5) and a plant air conditioning device (6); wherein: The solar power generation device (1) is arranged on the roof or pool top of the sewage treatment plant, and its power output end is electrically connected to the electrochemical energy storage device (2) and the power equipment (3) in the plant area respectively; The electrochemical energy storage device is arranged on an open space at a transformer substation in the sewage treatment plant, and its power output end is electrically connected to the electrical equipment in the plant area; The waste heat recovery pump group (4) is respectively provided with an electric power input end, a waste hot water input end and a hot water supply output end. The electric power input end is respectively electrically connected to the electric power output end of the solar power generation device (1) and the electric power output end of the electrochemical energy storage device (2). The hot water input end is connected to the sewage treatment plant drainage pipe. The hot water supply output end is respectively connected to the plant air conditioning equipment (6), the plant radiator (5) and the plant domestic hot water equipment of the sewage treatment plant.

2. The low-carbon energy system for sewage treatment plants according to claim 1 is characterized in that: The solar power generation device (1) adopts a distributed photovoltaic power generation device.

3. The low-carbon energy system for sewage treatment plants according to claim 1 is characterized in that: The electrochemical energy storage device (2) uses a lithium iron phosphate battery.

4. The low-carbon energy system for sewage treatment plants according to claim 1 is characterized in that: The waste heat recovery pump group (4) adopts an ultra-low pressure driven sewage source heat pump.

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