A silo capable of automatically collecting dust and a dry desulfurization system

Abstract

The present invention provides a silo capable of automatically collecting dust and a dry desulfurization system. The silo capable of automatically collecting dust comprises a silo body (10) and a dust collection system (20). The dust collection system (20) comprises a dust measuring instrument (21), a control unit (22) and a dust discharge pipe (23). The dust measuring instrument (21) can measure the dust concentration in the silo body (10). The inlet end of the dust discharge pipe (23) is connected to the silo body (10). A regulating valve (24) is provided on the dust discharge pipe (23). The control unit (22) can control the opening of the regulating valve (24) according to the dust concentration measured by the dust measuring instrument (21). A constant negative pressure environment can be established in the silo capable of automatically collecting dust, which completely solves the problem of dust leakage in the storage silo during the process of storing and unloading materials, and the dust material can also be further utilized.

Description

Technical Field

[0001] The invention relates to a silo capable of automatically collecting dust, and also relates to a dry desulfurization system. Background Art

[0002] During the production process, many materials need to be stored temporarily or for a long time in storage silos. There are many types of storage silos and many types of storage materials. In the process of storing materials (loading) or unloading materials (unloading) in the silo, most of them will have dust leakage. The existing technology mainly relies on adding a single-point dust removal system to the dust leakage point to reduce dust spillage or remove the dust that has already escaped, so as to meet environmental protection standards and improve the production environment.

[0003] However, this method has an impact on production and construction itself. The increase of equipment and facilities will directly lead to an increase in investment and land occupation during the construction process, an increase in the amount of inspection and maintenance during the production process, and an increase in system failure points. The collected dust is also directly discarded as waste. Summary of the invention

[0004] In order to solve the dust removal problem in the silo, the present invention provides a silo capable of automatically collecting dust and a dry desulfurization system. The silo capable of automatically collecting dust can establish a constant negative pressure environment, which completely solves the problem of dust leakage during storage and unloading of materials in the silo, and the dust material can also be further utilized. The dry desulfurization system is simpler and more reliable, and can effectively reduce investment, land occupation, and reduce the workload of inspection and maintenance.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A silo capable of automatically collecting dust comprises a silo body and a dust collection system. The dust collection system comprises a dust measuring instrument, a control unit and a dust discharge pipe. The dust measuring instrument can measure the dust concentration in the silo body. The inlet end of the dust discharge pipe is connected to the silo body. A regulating valve is arranged on the dust discharge pipe. The control unit can control the opening of the regulating valve according to the dust concentration measured by the dust measuring instrument.

[0007] A feeding port is arranged on the upper part of the bin body, and a dust measuring instrument is located around the feeding port.

[0008] A first pressure gauge is also provided in the warehouse body, and the first pressure gauge can measure the air pressure in the warehouse body. The first pressure gauge is connected to the control unit.

[0009] The first pressure gauge is located around the feeding port.

[0010] The dust exhaust duct includes a first vertical section, a first horizontal section, a second vertical section and a second horizontal section arranged in sequence along the direction from the inlet end of the dust exhaust duct to the outlet end of the dust exhaust duct, and the lower end of the first vertical section is connected to the top of the bin body.

[0011] The regulating valve is located on the first vertical section.

[0012] A second pressure gauge is provided on the second horizontal section, and the second pressure gauge is connected to the control unit.

[0013] The outlet end of the dust exhaust duct is connected to the negative pressure source.

[0014] The inlet end of the dust discharge duct corresponds to the area of ​​the silo where no materials are accumulated.

[0015] A dry desulfurization system comprises a smoke exhaust pipe and a dust removal device, wherein the outlet end of the smoke exhaust pipe is connected to the inlet end of the dust removal device. The dry desulfurization system also comprises the above-mentioned silo capable of automatically collecting dust, wherein the silo contains a desulfurizer, and the outlet end of the dust exhaust pipe is connected to the smoke exhaust pipe.

[0016] The beneficial effects of the present invention are:

[0017] 1. The negative pressure silo has a stable environment, which can effectively prevent the dust in the silo from escaping, and can achieve 100% dust-free.

[0018] 2. The dust collection system has a simple structure, low cost and no separate land requirement.

[0019] 3. There is no equipment in the dust collection system that requires extensive inspection and maintenance, and daily inspections can meet the requirements.

[0020] 4. There are few devices in the dust collection system, and the continuous operation reliability is extremely high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1 It is a schematic diagram of the silo capable of automatically collecting dust according to the present invention.

[0023] Figure 2 It is a schematic diagram of the dry desulfurization system.

[0024] 10. Silo; 20. Dust collection system; 30. Dry desulfurization system;

[0025] 11. Feeding port;

[0026] 21. Dust measuring instrument; 22. Control unit; 23. Dust discharge pipe; 24. Regulating valve; 25. First pressure gauge; 26. Second pressure gauge;

[0027] 31. Smoke exhaust duct; 32. Dust removal device; 33. Reaction device; 34. Fan;

[0028] 231, first vertical segment; 232, first horizontal segment; 233, second vertical segment; 234, second horizontal segment. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] A silo capable of automatically collecting dust comprises a silo body 10 and a dust collection system 20, wherein the dust collection system 20 comprises a dust measuring instrument 21, a control unit 22 and a dust discharge pipe 23, wherein the dust measuring instrument 21 is capable of measuring the dust concentration in the silo body 10, the inlet end of the dust discharge pipe 23 is connected to the silo body 10, and a regulating valve 24 is arranged on the dust discharge pipe 23, and the control unit 22 is capable of controlling the opening of the regulating valve 24 according to the dust concentration measured by the dust measuring instrument 21, such as Figure 1 shown.

[0031] The outlet end of the dust exhaust pipe 23 is connected to a negative pressure source (the negative pressure P of the negative pressure source is required to be -200Pa≥P≥-2000Pa). The dust measuring instrument 21 can send the measured dust concentration value to the control unit 22 (PLC). The dust exhaust pipe 23 can automatically extract and collect the dust in the bin body 10, so that a constant negative pressure environment is established in the bin body 10, and the dust can be automatically captured and collected, which completely solves the problem of dust leakage in the storage bin during the storage and unloading of materials, and the dust material can also be further utilized.

[0032] In this embodiment, a loading port 11 is provided at the upper part of the silo body 10, a discharge port is provided at the lower part of the silo body 10, and a dust measuring instrument 21 is located around the loading port 11. Usually, the dust concentration at the loading port 11 is relatively high when loading materials, and the dust measuring instrument 21 is arranged around the loading port 11 to facilitate detection and control of dust concentration.

[0033] In this embodiment, the dust collection system 20 also includes a first pressure gauge 25 and a second pressure gauge 26. The first pressure gauge 25 is located in the silo body 10. The first pressure gauge 25 is located around the loading port 11. The first pressure gauge 25 can measure the air pressure in the silo body 10. The first pressure gauge 25 is connected to the control unit 22. The first pressure gauge 25 can send the detected pressure value to the control unit 22.

[0034] In this embodiment, along the direction from the inlet end of the dust exhaust duct 23 to the outlet end of the dust exhaust duct 23, the dust exhaust duct 23 includes a first vertical section 231, a first horizontal section 232, a second vertical section 233 and a second horizontal section 234 arranged in sequence, and the lower end of the first vertical section 231 is connected to the top of the warehouse body 10.

[0035] The regulating valve 24 is located on the first vertical section 231, and the second pressure gauge 26 is located on the second horizontal section 234. The second pressure gauge 26 is connected to the control unit 22. The second pressure gauge 26 is used to measure the gas pressure in the dust exhaust pipe 23, and the second pressure gauge 26 can send the detected pressure value to the control unit 22.

[0036] The regulating valve 24 is an electric butterfly valve. The control unit 22 can control the switch and opening of the regulating valve 24, thereby playing the role of automatic switching and automatic adjustment of the valve opening, so as to adjust the flow area of ​​the dust discharge pipe 23, control the environmental pressure of the negative pressure bin, avoid dust leakage due to insufficient pressure, and material suction due to excessive pressure in the pipe.

[0037] In this embodiment, the inlet end of the dust discharge duct 23 can be connected to the top of the silo 10, or the inlet end of the dust discharge duct 23 can also correspond to the area without material accumulation of the silo 10. It is ensured that the duct is not blocked by the material in the silo, and the duct will not directly suck the material into the duct during the process of establishing the negative pressure silo environment.

[0038] A dry desulfurization system comprises a smoke exhaust pipe 31 and a dust removal device 32, wherein the outlet end of the smoke exhaust pipe 31 is connected to the inlet end of the dust removal device 32, and the dry desulfurization system 30 further comprises the above-mentioned silo capable of automatically collecting dust, wherein the silo body 10 contains a desulfurizer, and the outlet end of the dust exhaust pipe 23 is connected to the smoke exhaust pipe 31, such as Figure 2 shown.

[0039] The dry desulfurization system 30 also includes a reaction device 33 and a fan 34. The inlet end of the smoke exhaust pipe 31 is connected to the outlet end of the reaction device 33, and the outlet end of the dust removal device 32 is connected to the fan 34. The warehouse body 10 can supply desulfurizer to the reaction device 33, and the flue gas and the desulfurizer enter the reaction device 33 for reaction and desulfurization. The fan 34 can generate negative pressure in the smoke exhaust pipe 31, so that the smoke enters the dust removal device 32 from the reaction device 33 through the smoke exhaust pipe 31.

[0040] The outlet end of the dust discharge pipe 23 of the dust collection system 20 of the above-mentioned silo capable of automatically collecting dust is connected to the smoke exhaust pipe 31, and the fan 34 and dust removal device 32 of the existing dry desulfurization system can be used, and no additional fan and dust removal device are required. The dust collection system 20 is simple and reliable, which can effectively reduce investment and land occupation, and reduce the workload of inspection and maintenance. The dust collected by the dust collection system 20 enters the smoke exhaust pipe 31 and reacts with the flue gas for desulfurization, so that the material can be further utilized.

[0041] The following takes nano-based dry desulfurization as an example to introduce the working process of the silo capable of automatically collecting dust and the dry desulfurization system (which may be referred to as the nano-based dry desulfurization system).

[0042] The silo 10 is loaded with nano-based desulfurizer. When the silo 10 is loaded (or unloaded), the pressure in the silo 10 fluctuates, causing small particles of material in the silo 10 to float and generate dust in the silo. At this time, the system dust measuring instrument 21 measures the dust data and sends it to the control unit 22. When the data is greater than 10mg / Nm 3 Under this circumstance, the control unit 22 controls the regulating valve 24 to open, and sucks the gas and dust particles in the silo 10 through the dust exhaust pipe 23, and feeds back the pressure data through the first pressure gauge 25 installed on the silo 10. The control unit 22 adjusts the opening of the regulating valve 24 to form a stable negative pressure silo environment inside the silo 10, so that the small particles floating in the silo 10 will not overflow from the silo 10 and cause dust leakage.

[0043] After the dust collection system 20 is started, the dust measuring instrument 21 measures the dust concentration data in real time. When the dust concentration data is less than 2 mg / Nm 3 When the pressure difference between the second pressure gauge 26 installed on the dust discharge pipe 23 and the first pressure gauge 25 installed on the silo 10 exceeds the set value (the specific value is confirmed by calculation), the dust collection system 20 alarms, and the control unit 22 displays "negative pressure silo dust collection system" is blocked and needs to be inspected and maintained.

[0044] During the dust feeding process, dust leakage is serious. Each time feeding: the feeding port 11 is opened - feeding starts - the dust measuring instrument 21 detects that the dust content exceeds the standard - the dust collection system 20 is started - the control unit 22 controls the opening of the regulating valve 24 to control the negative pressure in the bin body 10 to be stable - feeding stops - the dust measuring instrument 21 checks that the dust content is qualified - the dust collection system 20 stops working.

[0045] The system works intermittently, the silo 10 has good sealing performance, and the dust exhaust pipe 23 connected to the negative pressure source has good suction capacity. A stable negative pressure silo environment is formed in the silo 10. The nano-desulfurization agent powder particles in the upper part of the silo 10 are discharged into the dust removal device 32 through the dust exhaust pipe 23 of the dust collection system 20. The nano-desulfurization agent powder particles enter the dust collector and still participate in the flue gas desulfurization reaction in the dust removal device 32, and are then removed by the dust removal device 32 to meet the emission standards, thereby achieving full utilization of the dust particles in the silo 10.

[0046] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the present invention, should still fall within the scope of this patent. In addition, the technical features of the present invention can be freely combined with each other, with technical features and technical solutions, and with technical solutions.

Claims

1. A dry desulfurization system, characterized in that: The dry desulfurization system comprises a smoke exhaust pipe and a dust removal device, the outlet end of the smoke exhaust pipe is connected to the inlet end of the dust removal device, and the dry desulfurization system also comprises a silo capable of automatically collecting dust; The silo capable of automatically collecting dust comprises a silo body and a dust collection system, the dust collection system comprising a dust measuring instrument, a control unit and a dust discharge pipe, the dust measuring instrument being capable of measuring the dust concentration in the silo body, the inlet end of the dust discharge pipe being connected to the silo body, a regulating valve being provided on the dust discharge pipe, and the control unit being capable of controlling the opening of the regulating valve according to the dust concentration measured by the dust measuring instrument; A loading port is provided on the upper part of the bin body, and a dust measuring instrument is located around the loading port; The silo contains a desulfurizer, and the outlet end of the dust exhaust duct is connected to the smoke exhaust duct; A first pressure gauge is also provided in the bin body, and the first pressure gauge can measure the air pressure in the bin body, and the first pressure gauge is connected to the control unit; In the direction from the inlet end of the dust exhaust duct to the outlet end of the dust exhaust duct, the dust exhaust duct comprises a first vertical section, a first horizontal section, a second vertical section and a second horizontal section which are arranged in sequence, and the lower end of the first vertical section is connected to the top of the bin body; A second pressure gauge is provided on the second horizontal section, and the second pressure gauge is connected to the control unit; When the difference between the measured value of the second pressure gauge installed on the dust discharge pipe and the measured value of the first pressure gauge installed on the bin body exceeds the set value, the dust collection system alarms.

2. The dry desulfurization system according to claim 1, characterized in that: The first pressure gauge is located around the feeding port.

3. The dry desulfurization system according to claim 1, characterized in that: The regulating valve is located on the first vertical section.

4. The dry desulfurization system according to claim 1, characterized in that: The outlet end of the dust exhaust duct is connected to the negative pressure source.

5. The dry desulfurization system according to claim 1, characterized in that: The inlet end of the dust discharge duct corresponds to the area of ​​the silo where no materials are accumulated.

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