Accurate weighing biomass gasification furnace closed material bin

Abstract

The utility model discloses a biomass gasification furnace closed material bin of accurate weighing, include: hopper, material bin body, gasification furnace and support frame, the outlet of hopper is located the top of material bin body, and the feed inlet of material bin body corresponds, gasification furnace is located the below of material bin body, and the import of gasification furnace is linked together with the discharge port of material bin body, support frame includes: stand and crossbeam, and multiple crossbeams set up between two adjacent stands, hopper sets up at the top of top crossbeam, and material bin body outside is provided with weighing sensor, and weighing sensor places at the top of middle crossbeam, the closed material bin in the utility model is good in leakproofness, and can provide accurate data for the calculation of gas production rate.

Description

Technical Field

[0001] This utility model relates to the field of biomass gasification furnace technology, and more specifically to a sealed silo for a biomass gasification furnace with precise weighing. Background Technology

[0002] In the biomass energy industry, the gas production rate of a gasifier is one of the important indicators for measuring its efficiency, and accurate measurement of raw material consumption is the key to calculating the gas production rate.

[0003] Currently, none of the biomass gasification projects in operation have achieved precise measurement of consumed raw materials. The actual projects in operation usually estimate the gasification rate by recording each batch of incoming materials, estimating the volume of each feeding, and combining the gas production. However, due to factors such as the moisture content of each batch of raw materials and the composition of wood types, it is difficult to accurately calculate the efficiency of the gasifiers in operation.

[0004] Therefore, developing a precise weighing closed silo for biomass gasification furnaces that can provide accurate data for calculating gas production rate is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a sealed biomass gasification furnace silo with precise weighing that can provide accurate data for calculating gas production rate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sealed silo for a precision weighing biomass gasification furnace, comprising:

[0008] Feeding hopper

[0009] The hopper body has its outlet located at the top of the hopper body, and its inlet corresponding to the hopper body.

[0010] A gasifier is located below the silo body, and the inlet of the gasifier is connected to the outlet of the silo body.

[0011] The support frame includes: uprights and crossbeams, with multiple crossbeams arranged between two adjacent uprights; the feeding hopper is located on top of the top crossbeam; a weighing sensor is installed on the outside of the hopper body, and the weighing sensor is located on top of the middle crossbeam.

[0012] The advantages of adopting the above technical solution are that by placing the weighing sensor outside the silo body and on the central crossbeam, there is no rigid connection between the silo body, the feeding hopper, and the gasifier, thus achieving accurate weighing of the raw materials inside the silo and providing accurate data for gas production rate calculation. At the same time, the overall structure has good sealing performance, reducing air ingress.

[0013] Preferably, a feeding auger is provided below the feeding hopper, the feeding auger is connected to the top crossbeam, and the outlet of the feeding auger is opposite to the inlet of the hopper body.

[0014] Preferably, both the inlet and outlet of the silo body are equipped with gate valves. Installing gate valves at the inlet and outlet of the silo enables airtight control of the silo, preventing air from entering the gasifier, improving safety, and preventing deflagration accidents.

[0015] Preferably, annular water seal grooves are provided on the crossbeams corresponding to the top and bottom of the silo body, and annular water seal baffles extending outward are provided on the outside of the feed inlet and discharge outlet of the silo body, with the water seal baffles placed inside the water seal grooves. Through the cooperation of the water seal grooves and water seal baffles, a flexible sealing connection is achieved between the silo and the feeding auger and gasifier, ensuring the system's airtightness while avoiding the impact of rigid connections on balancing accuracy.

[0016] Preferably, a first annular baffle is provided at the outlet of the feeding auger, and the first annular baffle is located inside the feed inlet of the hopper body.

[0017] Preferably, a second annular baffle is provided at the discharge port of the hopper body, and the second annular baffle is located inside the feed port of the gasifier.

[0018] Preferably, a level gauge is installed inside the feeding hopper. The level gauge allows for real-time monitoring of the raw material level in the hopper, facilitating timely replenishment and preventing empty or overflowing hoppers.

[0019] Preferably, a high-level gauge and a low-level gauge are respectively installed in the silo body and the gasifier. The installation of high-level and low-level gauges in the silo body and the gasifier enables automatic monitoring of material levels and facilitates automatic loading and unloading in conjunction with the control system.

[0020] Preferably, the gasifier includes: an inner barrel, a barrel body, and a top cover; the top cover is fastened to the top of the barrel body; the inner barrel is placed inside the barrel body, and the top of the inner barrel passes through the top cover and is positioned below the discharge port of the hopper body.

[0021] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a sealed silo for a biomass gasification furnace with precise weighing, the beneficial effects of which are:

[0022] (1) By setting up independent weighing sensors, the influence of rigid connection on weighing accuracy is avoided, and the amount of raw material entering the gasifier each time can be accurately measured, providing reliable data support for gas production rate calculation.

[0023] (2) The double sealing of the slide gate valve and water seal structure effectively prevents air from entering the gasifier, thereby reducing the oxygen content in the biomass gas. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 The attached figure is a schematic diagram of the overall structure of the gasifier's sealed silo provided by this utility model;

[0026] Figure 2 The attached figure is a structural schematic diagram of the hopper body provided by this utility model;

[0027] Figure 3 The attached figure is a structural schematic diagram of the top feed inlet of the hopper body provided by this utility model;

[0028] Figure 4 The attached figure is a structural schematic diagram of the bottom discharge port of the hopper body provided by this utility model.

[0029] In the figure,

[0030] 1-Feeding hopper;

[0031] 11-Level gauge;

[0032] 2-silo body;

[0033] 21-Slide valve; 22-Water seal baffle; 23-Second annular baffle;

[0034] 3-Gasifier;

[0035] 31-Inner tub; 32-Bundle body; 33-Top lid;

[0036] 4-Support frame;

[0037] 41-Column; 42-Beam;

[0038] 5 - Weighing sensor;

[0039] 6-Feeding auger;

[0040] 61-First annular baffle plate;

[0041] 7-Water seal tank; 8-High level gauge; 9-Low level gauge. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] This utility model embodiment discloses a sealed silo for a biomass gasification furnace with precise weighing capabilities, comprising:

[0044] Feeding hopper 1,

[0045] The outlet of the hopper 1 is located at the top of the hopper body 2, and the inlet of the hopper body 2 is corresponding to it.

[0046] Gasifier 3 is located below the silo body 2, and the inlet of gasifier 3 is connected to the outlet of silo body 2.

[0047] The support frame 4 includes: uprights 41 and crossbeams 42, with multiple crossbeams 42 arranged between two adjacent uprights 41; the feeding hopper 1 is arranged on the top of the top crossbeam 42; a weighing sensor 5 is arranged on the outside of the hopper body 2, and the weighing sensor 5 is placed on the top of the middle crossbeam 42.

[0048] To further optimize the above technical solution, the hopper body 2 is truncated cone shape, and four support bases are provided in the middle of the hopper. The weighing sensor 5 is located at the bottom of the support bases. (Appendix) Figure 1 This is just a plan view; in reality, there are not two columns, nor is there more than one crossbeam 42 at the same height. The four weighing sensors 5 are respectively installed on two crossbeams 42 at the same height. The conical top and bottom of the hopper body 2 are between the two crossbeams 42, so they do not interfere with each other. Furthermore, the shape of the hopper body 2 is designed to facilitate the falling of raw materials, and the hopper body 2 is made of carbon steel or stainless steel.

[0049] To further optimize the above technical solution, the weighing sensor 5 can be a strain gauge weighing sensor, a tension weighing sensor, a compression weighing sensor, etc. Since the silo body 2 is connected to the feeding auger 6 and the gasifier 3 by a water seal, and there is no rigid connection, the weight measured by the weighing sensor 5 is the weight of the silo body 2 and the raw materials inside.

[0050] To further optimize the above technical solution, a feeding auger 6 is installed below the feeding hopper 1. The feeding auger 6 is connected to the top crossbeam 42, and the outlet of the feeding auger 6 is opposite to the inlet of the hopper body 2. The feeding auger 6 can evenly transport the material in the feeding hopper 1 into the hopper body 2.

[0051] To further optimize the above technical solution, slide gate valves 21 are installed at both the inlet and outlet of the silo body 2. The slide gate valves 21 seal the silo body 2, opening and closing alternately during material feeding and discharging to prevent excessive air from entering the furnace during feeding, which could lead to a deflagration accident. The slide gate valves 21 can be either electric or pneumatic.

[0052] To further optimize the above technical solution, annular water seal grooves 7 are provided on the crossbeams 42 corresponding to the top and bottom of the silo body 2. Outwardly extending annular water seal baffles 22 are provided on the outside of the inlet and outlet of the silo body 2, and the water seal baffles 22 are placed inside the water seal grooves 7. The water seal grooves 7 are filled with water, achieving a seal at the connection between the feeding auger 6, the silo body 2, and the gasifier 3 through a water seal. Simultaneously, this sealed connection method avoids direct contact between the feeding auger 6, the gasifier 3, and the silo body 2, ensuring the accuracy of the detection results from the weighing sensor 5.

[0053] To further optimize the above technical solution, a first annular baffle plate 61 is provided at the outlet of the feeding auger 6, and the first annular baffle plate 61 is located inside the feed inlet of the hopper body 2. The first annular baffle plate 61 can prevent material from spilling out during the process of material being conveyed from the unloading auger 6 into the hopper body 2.

[0054] To further optimize the above technical solution, a second annular baffle 23 is provided at the discharge port of the silo body 2, and the second annular baffle 23 is located inside the feed port of the gasifier 3. The second annular baffle 23 can prevent material from spilling out during the process of conveying material from the silo body 2 into the gasifier 3.

[0055] To further optimize the above technical solution, a level gauge 11 is installed inside the feeding hopper 1.

[0056] To further optimize the above technical solution, a high level gauge 8 and a low level gauge 9 are respectively installed in the silo body 2 and the gasifier 3.

[0057] To further optimize the above technical solution, the gasifier 3 includes: an inner barrel 31, a barrel body 32, and a top cover 33; the top cover 33 is fastened to the top of the barrel body 32; the inner barrel 31 is placed inside the barrel body 32, and the top of the inner barrel 31 passes through the top cover 33 and is placed below the discharge port of the hopper body 2.

[0058] To further optimize the above technical solution, this enclosed silo is also equipped with an independent control system. The hardware adopts PLC, which can realize independent control of the silo and transmit signals to the control system of the biomass gasification station through communication, dry contact and other means.

[0059] Logic control process:

[0060] (1) Feeding the hopper: After receiving the signal from the low level gauge 9 located in the inner barrel 31 of the gasifier 3, the control system sends a feeding start signal, the raw material conveying device starts, and sends the raw material into the feeding hopper 1 on the top of the furnace. When the level gauge 11 in the feeding hopper 1 is triggered, the inlet gate valve 21 of the hopper body 2 opens, and then the feeding auger 6 starts to feed the hopper body 2. When the material level in the hopper body 2 reaches the set position, the high level gauge 8 is triggered to send a signal, the control system issues a stop feeding command, the raw material conveying device and the feeding auger 6 stop working, and the inlet gate valve 21 is closed.

[0061] (2) In-furnace feeding: After the feed inlet gate valve 21 of the silo body 2 is closed, the discharge gate valve 21 is opened, and the raw material in the silo body 2 falls into the gasifier 3 for feeding. When the material level in the furnace reaches the set position, the high material level gauge 9 is triggered to send a signal, and the control system closes the discharge gate valve 21.

[0062] This completes the feeding of gasifier 3.

[0063] Raw material weighing and measurement process:

[0064] After the initial installation of the silo device is completed, the system is zeroed to remove the weight of the silo body.

[0065] Total feed weight: After the hopper body is refilled and the feed inlet gate valve 21 is closed, the system records the total weight G of the hopper body after refilling. t .

[0066] Residual material metering: After the discharge port gate valve is closed, the system collects and records the residual weight G. r .

[0067] Feed amount per gasifier cycle: ΔG = G t -G r .

[0068] Metering of biomass gasification fuel production:

[0069] After the outlet gate valve closes, the control system of this unit sends a signal indicating that the valve is fully closed to the biomass gasification station's energy management system. The energy management system records this time point t. s And collect the current gas (steam) flow meter reading f. s .

[0070] When the gate valve at the discharge port closes again, the control system of this unit will send a signal indicating that the valve is fully closed to the biomass gasification station's energy management system. The energy management system will then record this time point t. f And collect the current gas (steam) flow meter reading f. f .

[0071] This allows us to obtain the gas (steam) flow rate Δf of the last time the gasifier was supplied with raw materials.

[0072] The gas production rate (steam production rate) of the biogas gasifier is η = Δf / ΔG.

[0073] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0074] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealed silo for a precise weighing biomass gasification furnace, characterized in that, include: Feeding hopper The hopper body has its outlet located at the top of the hopper body, and its inlet corresponding to the hopper body. A gasifier is located below the silo body, and the inlet of the gasifier is connected to the outlet of the silo body. The support frame includes: uprights and crossbeams, with multiple crossbeams arranged between two adjacent uprights; the feeding hopper is located on top of the top crossbeam; a weighing sensor is installed on the outside of the hopper body, and the weighing sensor is located on top of the middle crossbeam.

2. The sealed silo for a biomass gasification furnace with precise weighing according to claim 1, characterized in that, A feeding auger is provided below the feeding hopper. The feeding auger is connected to the top crossbeam, and the outlet of the feeding auger is opposite to the inlet of the hopper body.

3. The sealed silo for a precise weighing biomass gasification furnace according to claim 1, characterized in that, Both the inlet and outlet of the silo body are equipped with slide valves.

4. The sealed silo for a precise weighing biomass gasification furnace according to claim 1, characterized in that, Annular water seal grooves are provided on the crossbeams corresponding to the top and bottom of the silo body. Annular water seal baffles extending outward are provided on the outside of the inlet and outlet of the silo body, and the water seal baffles are placed inside the water seal grooves.

5. A sealed silo for a biomass gasification furnace with precise weighing according to claim 2, characterized in that, A first annular baffle is provided at the outlet of the feeding auger, and the first annular baffle is located inside the feed inlet of the hopper body.

6. The sealed silo for a precise weighing biomass gasification furnace according to claim 5, characterized in that, A second annular baffle is provided at the discharge port of the silo body, and the second annular baffle is located inside the feed port of the gasifier.

7. The sealed silo for a biomass gasification furnace with precise weighing according to claim 1, characterized in that, The feeding hopper is equipped with a level gauge.

8. A sealed silo for a biomass gasification furnace with precise weighing according to claim 7, characterized in that, The silo body and the gasifier are respectively equipped with a high level gauge and a low level gauge.

9. A sealed silo for a biomass gasification furnace with precise weighing according to claim 1, characterized in that, The gasifier includes an inner barrel, a barrel body, and a top cover; the top cover is fastened to the top of the barrel body; the inner barrel is placed inside the barrel body, and the top of the inner barrel passes through the top cover and is positioned below the discharge port of the hopper body.

Images