A backfire prevention safety system for cocoa bean shell boilers

Abstract

This utility model belongs to the field of cocoa shell boiler combustion technology, specifically relating to a backfire prevention safety system for cocoa shell boiler combustion, including: a hopper, a screw feeder, and pipelines; wherein, the hopper has a feed pipe at the top and a first discharge pipe at the bottom; one end of the screw feeder is connected to the bottom of the first discharge pipe, and the other end is connected to the boiler furnace through a second discharge pipe; one end of the pipeline is connected to an external clean water pipe, and the other end has two branch pipes connected to the hopper and the screw feeder respectively; each branch pipe is equipped with a shut-off valve and a parallel electromagnetic switch valve and a temperature control valve; both the hopper and the screw feeder are equipped with temperature detection elements and temperature sensing elements, and the detection signals are fed back to the electromagnetic switch valve and the temperature control valve respectively through temperature transmission control cables and capillary pressure guide tubes to control the opening and closing of the valves. This utility model can solve the problem of backfire that often occurs when cocoa shells are burned in cocoa shell boilers, and has good market application prospects.

Description

Technical Field

[0001] This utility model belongs to the field of cocoa bean shell boiler combustion technology, specifically relating to a cocoa bean shell boiler combustion backfire prevention safety system. Background Technology

[0002] Cocoa beans are an important agricultural product, and their processed products are widely used in the food and beverage, cosmetics, and pharmaceutical industries worldwide. The main processing steps of cocoa beans include fermentation, drying, roasting, shelling, and grinding; these steps are crucial to ensuring the quality and taste of the final product. The main products after cocoa bean processing include cocoa liquor, cocoa butter, and cocoa powder, which are not only key raw materials in the food industry but also play an important role in daily life.

[0003] Cocoa bean processing capacity is mainly concentrated in Europe and America, with raw materials primarily sourced from Africa. Cocoa bean shells are a byproduct of cocoa processing and are mainly used as fuel in cocoa shell boilers in cocoa plants to generate steam for production. Cocoa shells as boiler fuel have the following characteristics: low density, small volume; dryness, high volatile content, easy ignition, and rapid combustion rate. However, due to the inherent characteristics of the fuel, backfire frequently occurs when burning cocoa shells in a cocoa shell boiler. Therefore, this application provides a backfire prevention safety system for cocoa shell boiler combustion to ensure the safety and stability of boiler operation.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a backfire prevention safety system for cocoa bean shell boilers to solve the problem of backfire that often occurs when burning cocoa bean shells in cocoa bean shell boilers.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A backfire prevention safety system for cocoa bean shell boilers includes:

[0008] The hopper has a feed pipe at the top and a first discharge pipe at the bottom; the hopper is equipped with a temperature detection element and a temperature sensing element.

[0009] The screw feeder has one end connected to the bottom of the first discharge pipe and the other end connected to the boiler furnace through the second discharge pipe; the screw feeder is also equipped with temperature detection elements and temperature sensing elements.

[0010] The pipeline has one end connected to an external clean water pipe and the other end equipped with a first branch pipe and a second branch pipe; the end of the first branch pipe entering the hopper is connected to multiple nozzles; the second branch pipe is connected to the screw feeder; both the first and second branch pipes are equipped with a shut-off valve, a solenoid valve, and a temperature control valve; the solenoid valve and the temperature control valve are connected in parallel; wherein...

[0011] The electromagnetic switch valve located on the first branch pipe is connected to the temperature detection element located on the silo via a temperature transmitter control cable 4, and the temperature control valve located on the first branch pipe is connected to the temperature sensing element located on the silo via a capillary pressure guide tube.

[0012] The electromagnetic switch valve located on the second branch pipe is connected to the temperature detection element located on the screw feeder via a temperature transmitter control cable, and the temperature control valve located on the second branch pipe is connected to the temperature sensing element located on the screw feeder via a capillary pressure guide tube.

[0013] Preferably, the second branch pipe is also equipped with a pressure alarm, which is connected to the DCS system.

[0014] Preferably, the temperature detection element is a temperature transmitter, and the temperature sensing element is a temperature-pressure conversion element.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The cocoa bean shell boiler combustion backfire prevention safety system of this utility model ensures the reliability of the device to start spraying water to cool down and extinguish the fire by setting dual temperature and pressure detection and dual valve control.

[0017] (2) The cocoa bean shell boiler combustion backfire prevention safety system of this utility model is easy to install and has a wide range of applications. By setting it on the screw feeder and silo, it helps to ensure the safety of the entire fuel system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the connection structure of this utility model;

[0019] Explanation of key figure labels:

[0020] 1. Pipeline; 2. Shut-off valve; 3. Solenoid switch valve; 4. Temperature transmitter control cable; 5. Temperature detection element; 6. Temperature control valve; 7. Capillary pressure guide tube; 8. Temperature sensing element; 9. Nozzle; 10. Pressure alarm. Detailed Implementation

[0021] The technical solution of this utility model patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] See attached document Figure 1 A backfire prevention safety system for cocoa bean shell boiler combustion includes: a silo, a screw feeder, and a pipeline 1; wherein,

[0025] The silo is equipped with a feed pipe at the top and a first discharge pipe at the bottom;

[0026] One end of the screw feeder is connected to the bottom of the first discharge pipe, and the other end is connected to the boiler furnace through the second discharge pipe.

[0027] One end of pipe 1 is connected to an external clean water pipe, and the other end is equipped with two branch pipes that are respectively connected to the silo and the screw feeder; each branch pipe is equipped with a shut-off valve 2 and a solenoid switch valve 3 and a temperature control valve 6 connected in parallel.

[0028] Both the hopper and the screw feeder are equipped with temperature detection elements 5 and temperature sensing elements 8. They are also equipped with two millisecond-response electromagnetic switching valves 3 and two thermodynamically self-balancing temperature control valves 6. The detection signals are fed back to the electromagnetic switching valves 3 and temperature control valves 6 via temperature transmission control cables 4 and capillary pressure guide tubes 7, respectively, to control the opening and closing of the valves. A SIL3-level pressure alarm 10 is also installed on the branch pipe connecting to the screw feeder. The pressure alarm 10 is connected to the DCS system for monitoring water pressure.

[0029] In this embodiment, the temperature sensing element 5 is a multivariable temperature transmitter (Pt1000 Class), and the temperature sensing element 8 is a temperature-pressure conversion element (compliant with standard EN 12266-1). The temperature bulb contains a temperature-sensing liquid. When the temperature of the controlled medium changes, the temperature change causes a pressure change, and the volume of the temperature-sensing liquid expands or contracts accordingly. This pressure is transmitted through a capillary tube, pushing or resetting the spring inside the valve to control the opening and closing of the temperature control valve 6.

[0030] When a cocoa bean shell boiler experiences backfire during combustion under abnormal operating conditions, the temperature inside the screw feeder will change. Temperature detection element 5 will feed back the temperature value signal to the DCS, which will drive the electromagnetic switch valve 3 and temperature control valve 6 through safety interlocking and protection logic. Temperature sensing element 8 can drive the valve to open and close without external energy based on the temperature change of the measured medium, and spray water into the screw feeder to achieve the purpose of cooling and extinguishing the fire.

[0031] When the backfire spreads to the cocoa bean shell hopper, the corresponding electromagnetic switch valve 3 and temperature control valve 6 can be activated, spraying water into the hopper through nozzles 9 to cool and extinguish the fire. All alarm and interlock signals are connected to the DCS to form a controllable cocoa bean shell boiler combustion backfire prevention safety system, ensuring the safety of cocoa bean shell boiler operation and the stability of production.

[0032] It should be noted that the system is equipped with two backfire detection triggering methods. First, the signal from the temperature sensing element 5 is transmitted back to the DCS, which, after passing through safety interlocks and protection logic algorithms, drives the opening of the electromagnetic switch valve 3. Second, in the extreme case of DCS power failure, the temperature bulb inside the temperature sensing element 8, based on the thermal expansion and incompressibility of liquids, can also directly drive the temperature control valve 6 through the capillary pressure tube 7, without the need for external energy, thus ensuring the reliability of fire extinguishing.

[0033] This utility model relates to a backfire prevention safety system for cocoa bean shell boilers. Addressing the deficiencies in the combustion characteristics of cocoa bean shell boiler materials and the control and management of the production process, it utilizes a distributed control system (DCS) to control the backfire process during boiler combustion. Temperature detection elements 5 and temperature sensing elements 8 monitor abnormal parameters and provide feedback to control valves, activating water spray to block backfire. Compared to installing steam extinguishing devices at the boiler furnace feed inlet, this backfire prevention method is easier to install, has a wider range of applications, and ensures safe boiler operation. It is highly practical and has promising market application prospects.

[0034] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A backfire prevention safety system for cocoa bean shell boilers, characterized in that, include: The hopper has a feed pipe at the top and a first discharge pipe at the bottom; the hopper is equipped with a temperature detection element and a temperature sensing element. The screw feeder has one end connected to the bottom of the first discharge pipe and the other end connected to the boiler furnace through the second discharge pipe; the screw feeder is also equipped with temperature detection elements and temperature sensing elements. The pipeline has one end connected to an external clean water pipe and the other end equipped with a first branch pipe and a second branch pipe; the end of the first branch pipe entering the hopper is connected to multiple nozzles; the second branch pipe is connected to the screw feeder; both the first and second branch pipes are equipped with a shut-off valve, a solenoid valve, and a temperature control valve; the solenoid valve and the temperature control valve are connected in parallel; wherein... The electromagnetic switch valve located on the first branch pipe is connected to the temperature detection element located on the silo via a temperature transmitter control cable, and the temperature control valve located on the first branch pipe is connected to the temperature sensing element located on the silo via a capillary pressure guide tube. The electromagnetic switch valve located on the second branch pipe is connected to the temperature detection element located on the screw feeder via a temperature transmitter control cable, and the temperature control valve located on the second branch pipe is connected to the temperature sensing element located on the screw feeder via a capillary pressure guide tube.

2. The anti-backfire safety system for cocoa bean shell boiler combustion according to claim 1, characterized in that, The second branch pipe is also equipped with a pressure alarm, which is connected to the DCS system.

3. The anti-backfire safety system for cocoa bean shell boilers according to claim 1, characterized in that, The temperature detection element is a temperature transmitter, and the temperature sensing element is a temperature-pressure conversion element.

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