Anti-explosion and anti-freezing device for biogas purification process

Abstract

The utility model relates to the field of biogas purification, and particularly discloses an anti-explosion and anti-freezing device for a biogas purification process, which comprises a hot water tank, a water outlet of the hot water tank is communicated with a water outlet pipe, a hot water pump is arranged on the water outlet pipe, the water outlet end of the water outlet pipe is communicated with a first main pipe, and the first main pipe is communicated with a second main pipe through a plurality of branch pipes. The water outlet end of the second main pipe is communicated with the hot water tank through a water return pipe; the sum of the number of the biogas drainage pipelines and the number of the speed regulating valves is equal to the number of the branch pipes, each biogas drainage pipeline is wound with one branch pipe, and each speed regulating valve is wound with one branch pipe; a temperature sensor is arranged in the hot water tank and electrically connected with the main control system. The device traces heat in a warm water mode, avoids explosion risks caused by methane leakage and short circuit of an electric tracing band, does not need to be replaced every year, and saves cost.

Description

Technical Field

[0001] The utility model relates to the field of biogas purification, in particular to an explosion-proof and antifreeze device used in a biogas purification process. Background Art

[0002] With the development of modern industry, many comprehensive utilization technologies have become increasingly mature and have achieved good economic and social benefits. The scope of comprehensive utilization of biogas involves many aspects such as planting, breeding, processing, service, and warehousing. Comprehensive utilization of biogas directly links biogas with modern enterprises, becoming an important means to develop corporate economic income and opening up new areas for biogas application.

[0003] The existing biogas purification process of enterprises mainly uses desulfurization and purification technology. The temperature in the northern region is relatively low in winter and the temperature changes greatly. The mixed gas in this process system has a large water content. The pipeline is easy to freeze during winter, affecting normal production. In order to solve the anti-freezing problem, the existing heating method mainly uses electric heating technology. Conventional electric heating technology mainly uses heating cables, which have the risk of short circuit fire. If the biogas pipeline leaks or has leaks, it is very easy to cause fire and explosion accidents. Moreover, because the electric heating cable is wrapped with external insulation, the regular inspection efficiency is low, and the service life is limited. It needs to be replaced regularly every year. When replacing, the insulation needs to be removed, resulting in double waste. Summary of the invention

[0004] In order to solve the above problems, the utility model provides an explosion-proof and antifreeze device for biogas purification process, which uses warm water for heating, avoiding the risk of explosion caused by biogas leakage and short circuit of electric heating tape, and does not need to be replaced every year, saving costs.

[0005] The technical scheme of the utility model is: an explosion-proof and antifreeze device for a biogas purification process, comprising a hot water tank, a water outlet of the hot water tank being connected to a water outlet pipe, a hot water pump being arranged on the water outlet pipe, a water outlet end of the water outlet pipe being connected to a first main pipe, the first main pipe being connected to a second main pipe via a plurality of branch pipes, and a water outlet end of the second main pipe being connected to the hot water tank via a return pipe; the sum of the number of biogas drainage pipes and speed regulating valves is the same as the number of branch pipes, each biogas drainage pipe is wound around a branch pipe, and each speed regulating valve is wound around a branch pipe; a temperature sensor is arranged in the hot water tank, and the temperature sensor is electrically connected to a main control system.

[0006] In an optional embodiment, a flow switch is provided on each branch pipe.

[0007] In an optional embodiment, both the first main pipe and the second main pipe are connected to an exhaust pipe and an exhaust pipe.

[0008] In an optional embodiment, a liquid level sensor is provided in the hot water tank, and the liquid level sensor is electrically connected to the main control system.

[0009] In an optional embodiment, the hot water tank is connected to a steam input pipe and a cold water input pipe, wherein the input end of the steam input pipe is connected to a target production pipeline of the biogas purification process, and waste heat steam from the target production pipeline is introduced into the hot water tank to heat the cold water.

[0010] In an optional embodiment, the hot water tank is connected to a steam exhaust pipe and an overflow pipe, and the output ends of the steam exhaust pipe and the overflow pipe are connected to the supernatant tank.

[0011] The utility model provides an explosion-proof and antifreeze device for biogas purification process, which has the following beneficial effects compared with the prior art: a hot water tank is set, a branch pipe is wrapped around each biogas drainage pipe and the speed regulating valve, and the hot water in the hot water tank is transported to each branch pipe to insulate the biogas drainage pipe and the speed regulating valve, so as to meet the process insulation requirements and avoid the risk of explosion caused by biogas leakage and short circuit of the electric heating belt. At the same time, a temperature sensor is set to monitor the hot water temperature in real time, which is convenient for checking the water temperature in real time. Further, the temperature is controlled within the target range according to the real-time detection of the water temperature, so that the hot water temperature can be adjusted up and down to ensure the diversity of process adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art 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.

[0013] Figure 1 It is a schematic diagram of the principle structure of an explosion-proof and antifreeze device for a biogas purification process provided by an embodiment of the utility model.

[0014] In the figure, 1-steam input pipe, 2-cold water input pipe, 3-liquid level sensor, 4-hot water tank, 6-steam discharge pipe, 7-overflow pipe, 8-temperature sensor, 9-outlet pipe, 10-hot water pump, 11-first main pipe, 12-flow switch, 13-branch pipe, 14-speed regulating valve, 15-exhaust pipe, 16-biogas drainage pipe, 17-second main pipe, 18-drain pipe. DETAILED DESCRIPTION

[0015] The present invention will be described in detail below with reference to the accompanying drawings and through specific embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following implementation modes.

[0016] like Figure 1As shown, an explosion-proof and antifreeze device for a biogas purification process provided by an embodiment of the utility model includes a hot water tank 4, which provides hot water to a subsequent branch, and obtains hot water by heating cold water with steam. Accordingly, the hot water tank 4 is connected with a steam input pipe 1 and a cold water input pipe 2, wherein the input end of the steam input pipe 1 is connected with a target production pipeline of the biogas purification process, and the waste heat steam of the target production pipeline is introduced into the hot water tank 4 to heat the cold water, so as to achieve waste heat utilization, improve resource utilization efficiency, and reduce costs. The cold water input pipe 2 is connected to the tap water supply end. The hot water tank 4 is also connected with a steam exhaust pipe 6 and an overflow pipe 7, and the output ends of the steam exhaust pipe 6 and the overflow pipe 7 are connected to the supernatant pool.

[0017] A temperature sensor 8 is provided in the hot water tank 4 to detect the water temperature in the hot water tank 4. The temperature sensor 8 is electrically connected to the main control system, which may be a main control DCS (Distributed Control System). The water temperature is displayed in real time on the main control DCS end, so that the temperature can be controlled between 5 and 40 degrees according to the process requirements to prevent freezing and shutdown accidents. In addition, a liquid level sensor 3 is provided in the hot water tank 4, and the liquid level sensor 3 is electrically connected to the main control system to monitor the water level in the hot water tank 4 in real time.

[0018] The water outlet of the hot water tank 4 is connected to a water outlet pipe 9, and a hot water pump 10 is arranged on the water outlet pipe 9. The water outlet end of the water outlet pipe 9 is connected to a first main pipe 11, and the first main pipe 11 is connected to a second main pipe 17 through multiple branch pipes 13. The water outlet end of the second main pipe 17 is connected to the hot water tank 4 through a return pipe 5, and the return pipe 5 returns the hot water to the hot water tank 4. Among them, the sum of the number of biogas drainage pipes 16 and the speed regulating valves 14 is the same as the number of branch pipes 13, and each biogas drainage pipe 16 is wound around a branch pipe 13, and each speed regulating valve 14 is wound around a branch pipe 13. Because the process requirements of biogas purification require that the temperature be controlled between 5-40 degrees, the PSA regulating valve and biogas drainage can operate normally. According to the process temperature requirements, this embodiment heats the clean water with steam and then circulates it with a pump to control the temperature between 5-40 degrees, which not only avoids the risk of explosion caused by biogas leakage and short circuit of the electric heating belt, but also can be adjusted up and down to meet the process requirements. Among them, the hot water pump 10 can be one for use and one for standby, which is convenient for switching.

[0019] In this embodiment, a flow switch 12 is provided on each branch pipe 13 to facilitate the adjustment of branch flow.

[0020] In this embodiment, the first main pipe 11 and the second main pipe 17 are both connected with an exhaust pipe 15 and an emptying pipe 18. The exhaust pipe 15 is used to exhaust air to prevent the pipeline from being in a vacuum state, which causes water to be unable to be injected, thereby preventing the water from being insufficient and the end of the pipe from achieving the preheating effect. The emptying pipe 18 is used to discharge the water in the pipe. The seasonal temperature can meet the production needs. When hot water heating is not needed, it is convenient to discharge the water in the hot water pipe to prevent rust and scaling.

[0021] The above disclosure is only the preferred implementation mode of the utility model, but the utility model is not limited thereto. Any non-creative changes that can be thought of by technicians in this field, as well as several improvements and modifications made without departing from the principle of the utility model, should fall within the scope of protection of the utility model.

Claims

1. An explosion-proof and antifreeze device for biogas purification process, characterized in that: It comprises a hot water tank, the water outlet of the hot water tank is connected to a water outlet pipe, a hot water pump is arranged on the water outlet pipe, the water outlet end of the water outlet pipe is connected to a first main pipe, the first main pipe is connected to a second main pipe via a plurality of branch pipes, the water outlet end of the second main pipe is connected to the hot water tank via a return pipe; the sum of the number of biogas drainage pipes and speed regulating valves is the same as the number of branch pipes, each biogas drainage pipe is wound around a branch pipe, and each speed regulating valve is wound around a branch pipe; a temperature sensor is arranged in the hot water tank, and the temperature sensor is electrically connected to the main control system.

2. The explosion-proof and antifreeze device for biogas purification process according to claim 1, characterized in that: A flow switch is provided on each branch pipe.

3. The explosion-proof and antifreeze device for biogas purification process according to claim 2, characterized in that: The first main pipe and the second main pipe are both connected with an exhaust pipe and an exhaust pipe.

4. The explosion-proof and antifreeze device for biogas purification process according to claim 1, 2 or 3, characterized in that: A liquid level sensor is arranged in the hot water tank, and the liquid level sensor is electrically connected to the main control system.

5. The explosion-proof and antifreeze device for biogas purification process according to claim 4, characterized in that: The hot water tank is connected with a steam input pipe and a cold water input pipe, wherein the input end of the steam input pipe is connected with a target production pipeline of the biogas purification process, and the waste heat steam of the target production pipeline is introduced into the hot water tank to heat the cold water.

6. The explosion-proof and antifreeze device for biogas purification process according to claim 5, characterized in that: The hot water tank is connected with a steam exhaust pipe and an overflow pipe, and the output ends of the steam exhaust pipe and the overflow pipe are connected to the supernatant pool.

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