Constant-temperature heating system based on intelligent valve control

Abstract

A constant-temperature heating system based on intelligent valve control is characterized by comprising a photo-thermal assembly, the photo-thermal assembly is used for converting light energy into heat energy through an internal pipeline, the photo-thermal assembly is provided with two outlets, one outlet is connected with the upper end of a biogas digester through a pipeline, the pipeline covers the upper end of the biogas digester, and the other outlet is connected with the lower end of the biogas digester. The other outlet of the photo-thermal assembly is connected with a home-entry tap water pipeline through the heat exchanger assembly; the temperature in the biogas digester is stabilized at about 35 DEG C by optimizing pipeline design and valve control logic, so that the biogas yield is increased, the gas quality is ensured, the design of the whole system fully considers the characteristics of decentralized energy demands in rural areas, the energy utilization rate is increased, the operation cost is reduced, and the energy utilization rate is increased. The positive effect on environmental protection is achieved; all the components are made of high-quality materials capable of bearing the complex environment in the biogas digester, and it is ensured that the system can continuously and reliably work for a long time.

Description

TECHNICAL FIELD

[0001] The utility model relates to marsh gas pool heating technical field especially relates to a constant temperature heating system based on intelligent valve control. BACKGROUND

[0002] With the increasing demand for clean energy and the increasing emphasis on environmental protection, biogas digester as a facility that can effectively handle organic waste and convert it into renewable energy - biogas, plays a key role in many fields. In rural areas, biogas digester can use livestock manure, crop straw and other agricultural waste for anaerobic fermentation, and the biogas produced can be used as fuel for cooking, lighting and other purposes, which not only reduces the dependence on traditional fossil energy, but also solves the problem of environmental pollution caused by random piling of organic waste, realizing the recycling of resources and the improvement of ecological environment. In some large-scale breeding farms and organic waste centralized treatment plants, biogas digester is an important means of waste harmless treatment and energy recovery, which helps enterprises reduce operating costs and meet environmental protection requirements;

[0003] In the process of biogas production, maintaining the optimum temperature of microbial activity in the biogas digester is crucial to improve the efficiency of gas production. The traditional biogas digester often lacks effective temperature control means, resulting in unstable gas production. To solve the above problems, a constant temperature heating system based on intelligent valve control is proposed. UTILITY MODEL CONTENT

[0004] In view of the above technical problems, the utility model provides a constant temperature heating system based on intelligent valve control, characterized by comprising a photothermal component, the photothermal component is used to convert light energy into heat energy through internal pipeline, the photothermal component has two outlets, one of which is connected with the upper end of the biogas digester through pipeline, the pipeline covers the upper end of the biogas digester and returns to the photothermal component through pipeline, the other outlet of the photothermal component is connected with the household water pipeline through the heat exchanger component and returns to the photothermal component through pipeline;

[0005] Further, the pipeline near the outlet of the photothermal component at the upper end of the biogas digester is provided with a control valve component and an auxiliary heating component, the upper end of the biogas digester is provided with a temperature sensor inside, and the temperature sensor is connected with the control valve component through wire;

[0006] Further, the bottom of the biogas digester has a circulating pipeline, the lower end of the biogas digester is provided with a temperature sensor inside, the circulating pipeline at the bottom of the biogas digester is provided with a control valve component, and the temperature sensor is connected with the control valve component through wire;

[0007] Further, the middle part of the household water pipeline is provided with a ground source heat pump assembly, the rear end of the household water pipeline is connected with the circulating pipeline at the bottom of the biogas tank through a heat exchanger assembly, and the tail end of the household water pipeline provides hot water outwardly.

[0008] Further, the control valve assembly comprises an electric control valve and a ball valve, the electric control valve is connected with a temperature sensor and is controlled by an external controller.

[0009] The utility model discloses beneficial effects are:

[0010] The utility model discloses through optimizing pipeline design and valve control logic to ensure that the temperature in the biogas tank is stable at about 35 DEG C, thereby improving the biogas production and guaranteeing the gas quality, and the design of the whole system fully considers the characteristics of the distributed energy demand in rural areas, not only improves the energy utilization rate, but also reduces the operation cost, has the positive role to environmental protection, all components select the high-quality material that can bear the complex environment in the biogas tank, ensure that the system can work reliably continuously in long time. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the overall structure schematic drawing of the utility model of a kind of constant temperature heating system based on intelligent valve control;

[0012] Figure 2 It is the control valve assembly structure schematic drawing of the utility model of a kind of constant temperature heating system based on intelligent valve control;

[0013] As shown in the drawing: 1, light and heat component;2, biogas tank;3, control valve assembly;4, auxiliary heating assembly;5, heat exchanger assembly;6, household water pipeline;7, ground source heat pump assembly. DETAILED DESCRIPTION

[0014] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of the utility model protection.

[0015] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and it is not indicated or implied that the device or element must have a particular orientation, a particular orientation and operation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0016] In the description of the utility model, it needs to explain, unless otherwise expressly provided and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between the two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0017] Embodiment 1

[0018] The utility model provides a kind of constant temperature heating system based on intelligent valve control, it is characterized by including light and heat component 1, light and heat component 1 is used to convert light energy into heat energy by internal pipeline, light and heat component 1 has two outlets, one of which is connected with the upper end of biogas tank 2 by pipeline, pipeline is covered on the upper end of biogas tank 2, and returns to light and heat component 1 by pipeline, the other outlet of light and heat component 1 is connected with household water supply pipeline 6 by heat exchanger component 5, and returns to light and heat component 1 by pipeline;

[0019] Further, the pipeline of the outlet of light and heat component 1 close to the upper end of biogas tank 2 is provided with control valve component 3 and auxiliary heating component 4, the upper end inside biogas tank 2 is provided with temperature sensor, and the temperature sensor is connected with control valve component 3 by wire;

[0020] Further, the bottom of biogas tank 2 has circulating pipeline, the lower end inside biogas tank 2 is provided with temperature sensor, control valve component 3 is arranged on the circulating pipeline of the bottom of biogas tank 2, and the temperature sensor is connected with control valve component 3 by wire;

[0021] Further, the middle of household water supply pipeline 6 is provided with ground source heat pump component 7, the rear end of household water supply pipeline 6 is connected with the circulating pipeline of the bottom of biogas tank 2 by heat exchanger component 5, and the end of household water supply pipeline 6 provides hot water outward;

[0022] Further, the control valve assembly 3 includes an electric control valve and a ball valve, the electric control valve is connected with the temperature sensor and controlled by an external controller.

[0023] Embodiment 2

[0024] In use, the pipeline inside the photothermal assembly 1 is used to convert light energy into heat energy, and provide hot water outside through two outlets, one of which is connected with the upper end of the biogas tank 2 through a pipeline and returns to the photothermal assembly 1 through a pipeline, and the temperature sensor at the upper end inside the biogas tank 2 monitors the temperature of the top space in the tank in real time, when the temperature is lower than 35℃, the temperature sensor sends a signal to the external controller to control the electric control valve of the control valve assembly 3 to gradually open, increase the flow of hot water, and increase the temperature, if the temperature is still insufficient after the electric control valve is fully opened, the auxiliary heating assembly 4 is controlled to start, until the temperature reaches 35℃, the hot water after passing through the biogas tank 2 becomes cold water, and returns to the photothermal assembly 1 through a pipeline;

[0025] The other outlet of the photothermal assembly 1 passes through the heat exchanger assembly 5 to preheat the cold water in the household water pipeline 6, at this time the hot water at the outlet of the photothermal assembly 1 becomes cold, and returns to the photothermal assembly 1 through a pipeline, the preheated warm water in the household water pipeline 6 is heated into hot water by the ground source heat pump assembly 7, and then passes through another heat exchanger assembly 5 to heat the cold water in the circulating pipeline at the bottom of the biogas tank 2 into hot water, and the end of the household water pipeline 6 is discharged to provide hot water, the temperature sensor at the lower end inside the biogas tank 2 monitors the temperature of the bottom space in the tank in real time, when the temperature is lower than 35℃, the temperature sensor sends a signal to the external controller to control the electric control valve of the control valve assembly 3 to gradually open, increase the flow of hot water, and increase the temperature, the hot water in the circulating pipeline at the bottom of the biogas tank 2 becomes cold water after passing through the bottom of the biogas tank 2, and is recirculated to the heat exchanger assembly 5 for heating;

[0026] The biogas tank 2 has an exhaust port, a discharge port and a feeding port;

[0027] In the device, for the pipeline of the non-buried part, hot galvanized steel pipes meeting the requirements of the national standard GB / T 3091 “Welded Steel Pipes for Low Pressure Fluid Conveying” are used, threaded connections are used when DN≤100mm, and flange connections are used when DN>100mm, all damaged galvanized layers need to be additionally treated for corrosion protection, and the galvanized steel pipes and the flanges are welded and then subjected to secondary galvanizing to ensure the corrosion protection effect;

[0028] The heating pipe used in the cavity of the biogas tank 2 is a heat-resistant polyethylene (PE-RT) pipe with an oxygen barrier layer, which complies with the GB / T28799-2012 standard, has a pipe grade of 4, a pipe series of S4, a working pressure of 0.80 MPa, a specification of De20x2.3, and one loop of one pipe material, avoids the existence of joints, and improves the reliability of the system;

[0029] The PE-RT heating pipe and the external galvanized steel pipe are fixed through a clamping type connecting piece, the main body of the connecting piece is forged brass, and the sealing property and durability of the interface are ensured;

[0030] The pressure-bearing capacity of all valves and accessories is 1.6 MPa, high-quality products are selected to ensure long-term stable operation, when the electric regulating valve is installed, the valve handle and the valve head are ensured to be parallel to the ground, and measures are taken to prevent the influence of direct sunlight on the performance;

[0031] The pipeline pipe at the bottom of the biogas tank 2 is laid on an extruded polystyrene foam board covered with aluminum foil, and the heat preservation board has the following properties: apparent density ≥ 20 Kg / m 3 , water absorption ≤ 2.0%, compressive strength > 200 KPa, thermal conductivity ≤ 0.035 W / (m·K), thickness > 40 mm, the aluminum foil is placed upward, a steel wire mesh (specification 50x50, Φ3mm) is laid on the aluminum foil, a heating coil pipe is arranged on the steel wire mesh, and finally a fine stone concrete filling layer and a dry-hard cement mortar layer are covered, the heating coil pipe is fixed on the steel wire mesh through nylon straps, and the laying method of the pipeline at the top is similar, except that the construction sequence is reversed, all the pipelines buried in the filling layer are single-jointless designs, and long-term reliable operation is ensured.

[0032] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. The various components mentioned in the utility model are common technologies in the prior art, and should be understood by those skilled in the art. The utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A constant temperature heating system based on intelligent valve control, characterized in that, It includes a solar thermal component, which converts light energy into heat energy through internal pipelines. The solar thermal component has two outlets. One outlet is connected to the upper end of a biogas digester through a pipeline that covers the upper end of the biogas digester and returns to the solar thermal component through a pipe. The other outlet of the solar thermal component is connected to the household tap water pipeline through a heat exchanger assembly and returns to the solar thermal component through a pipe.

2. The constant temperature heating system based on intelligent valve control according to claim 1, characterized in that, A control valve assembly and an auxiliary heating assembly are installed on the pipeline near the outlet of the solar thermal component at the top of the biogas digester. A temperature sensor is installed at the upper part of the biogas digester, and the temperature sensor is connected to the control valve assembly via a wire.

3. The constant temperature heating system based on intelligent valve control according to claim 2, characterized in that, The biogas digester has a circulation pipeline at the bottom, a temperature sensor is installed at the lower end of the digester, and a control valve assembly is installed on the circulation pipeline at the bottom of the digester. The temperature sensor is connected to the control valve assembly via a wire.

4. The constant temperature heating system based on intelligent valve control according to claim 3, characterized in that, A ground source heat pump assembly is installed in the middle of the household water supply pipeline. The rear end of the household water supply pipeline is connected to the circulation pipeline at the bottom of the biogas digester through a heat exchanger assembly. Hot water is provided to the outside from the end of the household water supply pipeline.

5. A constant temperature heating system based on intelligent valve control according to claim 4, characterized in that, The control valve assembly includes an electrically controlled valve and a ball valve. The electrically controlled valve is connected to a temperature sensor and is controlled by an external controller.

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