Condensation separation device

Abstract

The utility model discloses a condensation separation device which comprises a separation tower, a separation pipeline is arranged in the separation tower, the upper end of the separation pipeline is a gas inlet, and the lower end of the separation pipeline is a gas outlet; cooling liquid is contained in the separation tower, and the temperature of pyrolysis gas in the separation pipeline is gradually reduced along with movement from top to bottom; the separation pipeline is provided with a plurality of liquid discharge pipes from top to bottom, each liquid discharge pipe is provided with a valve, and different valves are opened, so that different liquid discharge pipes can collect different condensation products. The cooling device is ingenious in structural design and high in modularization degree, low-temperature cooling liquid is continuously added on the lower portion, high-temperature cooling liquid is continuously discharged on the upper portion, and therefore the dynamic balance of temperature gradient distribution of the cooling liquid from top to bottom is guaranteed; the surface area of the separation pipeline in the separation tower and the length of the separation pipeline are increased, the contact efficiency between pyrolysis gas and cooling liquid is improved, and the function that one device can separate multiple products at the same time is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of condensation, in particular to a condensation separation device. Background Art

[0002] China is rich in agricultural and forestry biomass resources. Biomass (including lignocellulose such as straws and trees, leftovers from agricultural product processing industries, agricultural and forestry waste, livestock manure, etc.), as a zero-emission green carbon resource, has the characteristics of a short regeneration cycle and a huge reserve. Based on the concept of low-carbon development and green ecology, China has increased the R & D investment in biomass resource utilization in recent years and established a number of biomass gasification demonstration projects.

[0003] Moreover, China is a large agricultural country, and a large amount of biomass is harvested every year. Biomass mainly composed of straws is mainly composed of plant cell walls, and its basic components are cellulose, hemicellulose, lignin, etc. Its elemental composition is mainly carbon, hydrogen, and oxygen, containing a small amount of sulfur, phosphorus, and mineral components. Its elemental and structural composition determines that straw is an important organic raw material and fuel.

[0004] The fuel application of biomass has always been a research topic, including making biochar, bio-crude oil, wood vinegar, biogas and other products after heat treatment of biomass.

[0005] Among them, products such as bio-crude oil, wood vinegar, and biogas are obtained through biomass pyrolysis. Existing biomass pyrolysis mostly draws on the treatment method of coal tar production. In large-scale equipment, straw is rapidly heated to 750 - 900 °C for pyrolysis to produce pyrolysis gas, and the generated pyrolysis gas is separated by stepwise condensation to obtain different components.

[0006] However, biomass is different from coal. There are problems such as more complex components, high ash content, and high water content in biomass pyrolysis treatment. The condensation separation equipment in existing biomass pyrolysis equipment generally uses multiple cooling devices in series, and each cooling device is set with a cooling temperature range, and the circulation of the coolant and the cooling temperature are independently controlled within a single cooling device.

[0007] However, there is a problem with this method. The components of different biomasses vary greatly (for example: even for the same straw, the components of corn straw and wheat straw are different), and due to different pyrolysis temperatures and pyrolysis states, the types of components that can be separated in the pyrolysis gas also vary greatly; especially in the multi-stage condensation process, sometimes only one or two main products need to be separated, while some need to separate more products. The existing technology can only be adjusted by increasing or decreasing the number of condensation devices. In the industrial production process, the process of increasing or decreasing the number of condensation devices each time is not only complicated in operation but also not convenient to adjust the type of separated products in a timely manner according to the pyrolysis situation of biomass. Especially when there are more components to be separated, the process of independently controlling multiple condensation devices is also relatively complicated.

[0008] Therefore, it is very necessary to develop a condensation separation device that can conveniently adjust the condensation separation temperature gradient of pyrolysis gas according to different biomass types and pyrolysis conditions, and can conveniently correspond to different component quantities. Utility Model Content

[0009] The utility model provides a condensation separation device, which has the effect of high separation efficiency and can selectively separate different products simultaneously. The specific technical solutions are as follows:

[0010] A condensation separation device, which includes a separation tower. A separation pipeline is arranged inside the separation tower. The upper end of the separation pipeline is a gas inlet, and the lower end of the separation pipeline is a gas outlet; a coolant is contained inside the separation tower. The pyrolysis gas inside the separation pipeline gradually decreases in temperature as it moves from top to bottom; multiple drain pipes are arranged on the separation pipeline from top to bottom, and a valve is arranged on each drain pipe. By opening different valves, different drain pipes can collect different condensation products.

[0011] Furthermore, a liquid inlet pipeline is arranged below the separation tower, and a liquid drain pipeline is arranged above the separation tower. The low-temperature coolant can enter the separation tower through the liquid inlet pipeline, and the high-temperature coolant above the separation tower can be discharged through the liquid drain pipeline.

[0012] Furthermore, a liquid level gauge is arranged on the side wall of the separation tower, and the stepped distribution of the coolant from top to bottom inside the separation tower can be controlled by adjusting the liquid level height of the coolant inside the separation tower.

[0013] Furthermore, multiple temperature sensors are arranged on the inner side wall of the separation tower from top to bottom to detect the temperature of the coolant at different heights in real time.

[0014] Furthermore, the separation pipeline is in the shape of Pall rings or spiral springs.

[0015] Furthermore, the separation pipeline includes multiple horizontally arranged gas transmission pipes that are evenly distributed from top to bottom and are connected end to end.

[0016] Furthermore, multiple drain pipes are connected to a liquid collection pipe, and the liquid collection pipe is connected to a first finished product tank.

[0017] Furthermore, a second finished product tank is also arranged below the separation tower, and the second finished product tank is connected to the bottom of the separation pipeline.

[0018] Furthermore, the liquid inlet pipeline is connected to a liquid distribution component, and the liquid distribution component is arranged below the interior of the separation tower. The liquid distribution component can evenly transport the low-temperature coolant to the lower part of the interior of the separation tower.

[0019] Furthermore, the liquid drain pipeline is floatingly arranged inside the upper part of the separation tower.

[0020] The structural design of the condensation separation device of the present utility model is ingenious and has a high degree of modularization. By continuously adding low-temperature coolant below and discharging high-temperature coolant above, the dynamic balance of the temperature gradient distribution of the coolant from top to bottom is ensured; the surface area of the separation pipeline in the separation tower and the length of the separation pipeline are increased, improving the contact efficiency between the pyrolysis gas and the coolant. Moreover, a plurality of drain pipes are arranged on the separation pipeline from top to bottom, and different drain pipes can collect different condensation products, realizing the function of separating multiple products with one device; it is applicable to various situations where the components of the pyrolysis gas are complex and the types of products to be separated are diverse.

[0021] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model are specifically exemplified below. Brief Description of the Drawings

[0022] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0023] Figure 1 is a side view of the condensation separation device of the present utility model;

[0024] Figure 2 is a three-dimensional view of the condensation separation device of the present utility model;

[0025] Figure 3 is a three-dimensional view of the separation pipeline of the condensation separation device of the present utility model. Detailed Description of the Embodiments

[0026] In order to better understand the purpose, function and specific design of the present utility model, the following further details the condensation separation device of the present utility model with reference to the drawings.

[0027] As Figures 1 - 3As shown in the figure, the condensation separation device of the present utility model includes a separation tower 1. A separation pipeline 2 is arranged inside the separation tower 1. The upper end of the separation pipeline 2 is a gas inlet 21, and the pyrolysis gas to be condensed and separated can enter the separation pipeline 2 through the gas inlet 21. The lower end of the separation pipeline 2 is a gas outlet 22, and the uncondensed pyrolysis gas can be discharged through the gas outlet 22. A coolant is contained inside the separation tower 1. As the pyrolysis gas in the separation pipeline 2 moves from top to bottom, its temperature gradually decreases. A plurality of drain pipes 3 are arranged on the separation pipeline 2 from top to bottom. A valve 31 is arranged on each drain pipe 3. By opening different valves 31, different drain pipes 3 can collect different condensation products.

[0028] Specifically, a liquid inlet pipeline 41 is arranged below the separation tower 1, and a liquid outlet pipeline 42 is arranged above the separation tower 1. The low-temperature coolant can enter the separation tower 1 through the liquid inlet pipeline 41, and the high-temperature coolant above the separation tower 1 can be discharged through the liquid outlet pipeline 42. By continuously adding low-temperature coolant at the bottom and discharging high-temperature coolant at the top, the dynamic balance of the temperature gradient distribution of the coolant from top to bottom can be ensured. Preferably, the liquid inlet pipeline 41 is connected to a liquid distribution component, and the liquid distribution component is arranged below the interior of the separation tower 1. The liquid distribution component can evenly transport the low-temperature coolant to the lower part of the interior of the separation tower 1 to ensure the uniform temperature of the coolant at the lower part of the interior of the separation tower 1. The liquid distribution component can be a cross-shaped or annular pipeline, and a plurality of through holes are evenly arranged on the pipeline. It can be understood that the liquid distribution component can also be in other forms as long as it can make the coolant evenly enter the lower part of the interior of the separation tower 1.

[0029] A liquid level gauge 5 is arranged on the side wall of the separation tower 1 to measure the liquid level height of the coolant in the separation tower 1. The liquid level height of the coolant in the separation tower 1 can be adjusted by adjusting the flow rates of the liquid inlet pipeline 41 and the liquid outlet pipeline 42, so as to control the gradient distribution of the coolant from top to bottom in the separation tower 1, so as to control the temperature of the pyrolysis gas in the separation pipeline 2 at different heights, and thus adjust the production capacity of different products. Preferably, the liquid outlet pipeline 42 is floatingly arranged inside the upper part of the separation tower. A float is arranged at one end of the liquid outlet pipeline 42 extending into the separation tower 1, so that no matter what liquid level height is adopted in the separation tower 1, the liquid outlet pipeline 42 can discharge high-temperature water to the outside.

[0030] Preferably, a plurality of temperature sensors are arranged on the side wall inside the separation tower 1 from top to bottom to detect the temperature of the coolant at different heights in real time. It can be understood that the temperature sensors can also be directly arranged on the separation pipeline 2.

[0031] The separation pipeline 2 can be a Pall ring or a spiral spring shape, etc., to increase the surface area of the separation pipeline 2 inside the separation tower 1 and the length of the separation pipeline 2, so as to improve the contact efficiency between the pyrolysis gas and the coolant. Figure 3As shown in the figure, the separation pipeline 2 of this embodiment includes a plurality of horizontally arranged gas pipelines 23 that are evenly distributed from top to bottom and connected end to end. The pyrolysis gas first enters the gas pipeline 23 on the right side, then enters the gas pipeline 23 in the middle, then enters the gas pipeline 23 on the left side, then enters the gas pipeline 23 in the middle again, and then enters the gas pipeline 23 on the right side, and so on, moving downward in a reciprocating cycle.

[0032] Since black humic acid can be separated when the biomass pyrolysis gas is cooled to 90 - 130°C, brown humic acid can be separated when cooled to 50 - 100°C, and yellow humic acid can be separated when cooled below 60°C. Therefore, this embodiment is very suitable for the condensation separation of humic acid. Of course, it can be understood that the present utility model is also applicable to the condensation separation of pyrolysis gas with complex components and diverse types of products to be separated.

[0033] A plurality of drain pipes 3 are connected to the liquid collecting pipe 32, and the liquid collecting pipe 32 is connected to the first finished product tank 61. The first finished product tank 61 can collect black humic acid or brown humic acid or yellow humic acid. Preferably, a second finished product tank 62 is further provided below the separation tower 1, and the second finished product tank 62 is communicated with the bottom of the separation pipeline 2. When the first finished product tank 61 collects black humic acid, as the uncondensed pyrolysis gas descends, brown humic acid and / or yellow humic acid will continue to be condensed. At this time, the second finished product tank 62 can continue to collect brown humic acid and / or yellow humic acid; when the first finished product tank 61 collects brown humic acid, as the uncondensed pyrolysis gas descends, yellow humic acid will continue to be condensed. At this time, the second finished product tank 62 can continue to collect yellow humic acid, avoiding waste of humic acid.

[0034] It should be noted that since the upper end of the separation pipeline 2 is the gas inlet 21 and the lower end is the gas outlet 22, the high-temperature pyrolysis gas runs from top to bottom. During the running process, the temperature gradually decreases from top to bottom. The cooling liquid inside the separation tower 1 also decreases in temperature from high to low from top to bottom. Therefore, during the condensation process, the overall temperature rise of the cooling liquid inside the separation tower 1 is slow, and a relatively stable temperature gradient can be ensured. Moreover, the temperature gradient of the cooling liquid inside the separation tower 1 can be adjusted and the dynamic balance of the temperature gradient can be maintained by adding low-temperature cooling liquid at the bottom of the separation tower 1 and discharging high-temperature cooling water at the top, so as to achieve the effect of extracting different products. In addition, if the high-temperature pyrolysis gas runs from bottom to top, the temperature of the bottom cooling liquid will rise rapidly. Even if the method of discharging high-temperature cooling liquid at the bottom of the separation tower 1 and adding low-temperature cooling water at the top is adopted, it is not easy to control the liquid temperature. It is very difficult to achieve the balance of the temperature gradient of the cooling liquid inside the separation tower 1. During the condensation process, the pyrolysis gas and the products condensed from the pyrolysis gas flowing back downward will disturb the temperature gradient of the cooling liquid.

[0035] The structural design of the condensation separation device of the present utility model is ingenious and has a high degree of modularization. By continuously adding low-temperature coolant below and discharging high-temperature coolant above, the dynamic balance of the temperature gradient distribution of the coolant from top to bottom is ensured; the surface area of the separation pipeline in the separation tower and the length of the separation pipeline are increased, improving the contact efficiency between the pyrolysis gas and the coolant. Moreover, a plurality of drain pipes are arranged on the separation pipeline from top to bottom, and different drain pipes can collect different condensation products, realizing the function of separating multiple products by one device.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A condensation separation device, characterized in that: The invention comprises a separation tower, wherein a separation pipe is arranged in the separation tower, wherein the upper end of the separation pipe is a gas inlet, and the lower end of the separation pipe is a gas outlet; a coolant is placed in the separation tower, and the temperature of the pyrolysis gas in the separation pipe gradually decreases as it moves from top to bottom; a plurality of drainage pipes are arranged from top to bottom in the separation pipe, and each drainage pipe is provided with a valve, and different drainage pipes can collect different condensation products by opening different valves.

2. The condensation separation device according to claim 1, characterized in that: A liquid inlet pipe is arranged below the separation tower, and a liquid discharge pipe is arranged above the separation tower. Low-temperature coolant can enter the separation tower through the liquid inlet pipe, and high-temperature coolant above the separation tower can be discharged through the liquid discharge pipe.

3. The condensation separation device according to claim 2, characterized in that: A liquid level gauge is provided on the side wall of the separation tower, and the step distribution of the coolant from top to bottom in the separation tower can be controlled by adjusting the liquid level of the coolant in the separation tower.

4. The condensation separation device according to claim 3, characterized in that: A plurality of temperature sensors are arranged on the side walls of the separation tower from top to bottom to detect the temperature of the coolant at different heights in real time.

5. The condensation separation device according to claim 1, characterized in that: The separation pipe is in the shape of a ball ring or a spiral spring.

6. The condensation separation device according to claim 5, characterized in that: The separation pipeline comprises a plurality of horizontally arranged gas transmission pipes which are evenly distributed from top to bottom and connected end to end.

7. The condensation separation device according to claim 1, characterized in that: A plurality of liquid discharge pipes are connected to the liquid collecting pipe, and the liquid collecting pipe is connected to the first finished product tank.

8. The condensation separation device according to claim 7, characterized in that: A second finished product tank is also arranged below the separation tower, and the second finished product tank is connected to the bottom of the separation pipeline.

9. The condensation separation device according to claim 2, characterized in that: The liquid inlet pipeline is connected to the liquid separation component, and the liquid separation component is arranged at the lower part of the separation tower. The liquid separation component can evenly transport the low-temperature coolant to the lower part of the separation tower.

10. The condensation separation device according to claim 3, characterized in that: The liquid discharge pipe is arranged in a floating manner above the inside of the tower.

Images