Bed replacement system is built to circulation ash
阅读说明：本技术 循环灰建床置换系统 (Bed replacement system is built to circulation ash ) 是由 江广旭 张萌 孙自强 史强 孔庆民 贺翠连 雷志银 孙更生 于 2019-12-03 设计创作，主要内容包括：本发明公开了一种循环灰建床置换系统,包括吸收塔和与所述吸收塔连通的除尘器灰斗；还包括建床置换装置,所述建床置换装置将所述吸收塔和灰库连通,用于将所述灰库中的活性灰输送至所述吸收塔。通过增加建床置换装置,解决了循环流化床半干法系统的启动时间长的问题,启停方便,将替代以人工为主的密封罐车装、卸灰及运输,实现循环流化床半干法吸收塔内的快速建立稳定流化床层,建床时间缩短60％,提高系统的快速性、稳定性。通过定期输灰置换,保持循环灰平衡和含水率平衡,解决循环灰吸水抱团板结、堵灰等问题,提高了系统运行的稳定、可靠性、灵活性,降低环保风险。(The invention discloses a circulating ash bed building and replacing system, which comprises an absorption tower and a dust remover ash bucket communicated with the absorption tower; the absorption tower is communicated with the ash storehouse through the bed building and replacing device, and the bed building and replacing device is used for conveying the active ash in the ash storehouse to the absorption tower. By adding the bed building replacement device, the problem of long starting time of the circulating fluidized bed semi-dry method system is solved, the starting and the stopping are convenient, manual sealing tank truck loading, ash unloading and transportation are replaced, the stable fluidized bed layer is quickly built in the circulating fluidized bed semi-dry method absorption tower, the bed building time is shortened by 60%, and the rapidity and the stability of the system are improved. Through regular ash conveying replacement, the balance of circulating ash and the balance of water content are kept, the problems of hardening, ash blocking and the like of circulating ash water absorption lumps are solved, the stability, the reliability and the flexibility of system operation are improved, and the environmental protection risk is reduced.)
1. A circulating ash bed building and replacing system comprises an absorption tower (4) and a dust remover ash hopper (7) communicated with the absorption tower (4); the device is characterized by further comprising a bed building and replacing device (2), wherein the absorption tower (4) is communicated with the ash storage (1) through the bed building and replacing device (2) and is used for conveying active ash in the ash storage (1) to the absorption tower (4).
2. The circulating ash bed building replacement system of claim 1,
the bed building and replacing device (2) also comprises a feed valve (2.1) communicated with the ash storehouse (1), a compressed air inlet valve (2.6) communicated with a compressed air source, and an output valve (2.8) for outputting fluidized state materials; the bed building and replacing device (2) is also internally provided with a material level meter (2.2), a fluidizing air chamber (2.3), a spraying material pipe (2.4), a balance exhaust valve (2.5) and a gasification valve (2.7).
3. The circulating ash bed building replacement system according to claim 2, further comprising a control and regulation device (3) connected between the bed building replacement device (2) and the absorption tower (4) for regulating the ash delivery flow of the bed building replacement device (2).
4. The circulating ash bed building replacement system according to claim 3, further comprising a gas make-up device (5) communicated with the pipeline between the absorption tower (4) and the control and regulation device (3) for regulating the gas flow in the pipeline.
5. A circulating ash bed building replacement system according to claim 4, characterized in that the control and regulation means (3) and the gas make-up means (5) are connected to a program control means (6).
6. The circulating ash bed building replacement system according to claim 5, characterized in that the piping between the absorption tower (4) and the control and regulation device (3) is also in communication with the ash hopper (7) of the dust remover for replacing high calcium ash in the ash hopper (7) of the dust remover with active ash in the ash silo (1).
Technical Field
The invention relates to the technical field of environmental protection, in particular to a circulating ash bed building and replacing system.
Background
At present, the ecological environment protection is taken as a life line and the lowest red line of an enterprise, and faces a severe challenge, and whether environmental protection equipment can be quickly started and stably run up to the standard for a long period is a key point for guaranteeing production.
Based on the principle of a circulating fluidized bed, through the cyclic utilization of materials, an absorbent, an adsorbent and circulating ash in a reaction tower form a dense-phase bed state, water is sprayed into the reaction tower, and various pollutants in flue gas can be subjected to chemical reaction or physical adsorption in the reaction tower; the flue gas purified by the reaction tower enters a downstream dust remover to further purify the flue gas.
SO in flue gas2NOx, almost all SO3Multi-component pollutants such as HCl, HF, heavy metal Hg and the like can be absorbed and removed in the process, the desulfurization efficiency can reach more than 98%, and the denitration efficiency can reach more than 70%; the technology is mature, stable and high in efficiency, does not produce waste water, occupies a small area, and has low investment and operation cost; the method is suitable for flue gas desulfurization, denitration, dust removal and multi-pollutant cooperative control in power station circulating fluidized bed boilers, steel industry and cement industry.
The semi-dry desulfurization, denitration and dust removal integrated process of the circulating fluidized bed has high reaction speed and high efficiency, and can remove Hg, heavy metals and SO in a synergic manner3Pollutants such as dioxins; no sewage discharge, no anticorrosive treatment for equipment system and chimney, and semi-dryingThe flue gas temperature of the process reaction tower is higher than 85 ℃, white smoke plume does not exist when the flue gas is discharged into the atmosphere, and the circulating fluidized bed semi-dry process is selected for more and more power plants and the steel and cement industries to carry out ultralow emission environmental protection parameter control.
However, the semidry method of the circulating fluidized bed often has the phenomena of long time for starting bed building and strong water absorption of circulating ash after the project is put into operation, and is easy to agglomerate, agglomerate and block ash, and the pressure of operation and maintenance for ash removal is higher.
Disclosure of Invention
The invention aims to provide a circulating ash bed building and replacing system which is short in bed building time. In a further technical scheme, the problems of hardening, ash blocking and the like of the circulating ash water absorption newspaper cluster can be solved.
In order to achieve the aim, the invention provides a circulating ash bed building and replacing system, which comprises an absorption tower and a dust remover ash hopper communicated with the absorption tower; the absorption tower is communicated with the ash storehouse through the bed building and replacing device, and the bed building and replacing device is used for conveying the active ash in the ash storehouse to the absorption tower.
Preferably, the bed building and replacing device further comprises a feeding valve communicated with the ash storehouse, a compressed air inlet valve communicated with a compressed air source, and an output valve for outputting fluidized state materials; the bed building and replacing device is also internally provided with a material level meter, a fluidization air chamber, a spraying material pipe, a balance exhaust valve and a gasification valve.
Preferably, the system also comprises a control and regulation device connected between the bed building displacement device and the absorption tower and used for regulating the ash conveying flow of the bed building displacement device.
Preferably, the absorption tower further comprises a gas supplementing device communicated with a pipeline between the absorption tower and the control and regulation device and used for regulating and controlling the gas flow in the pipeline.
Preferably, the control and regulation device and the gas supplementing device are both connected with a program control device.
Preferably, a pipeline between the absorption tower and the control and regulation device is also communicated with the ash hopper of the dust remover so as to replace high-calcium ash in the ash hopper of the dust remover with active ash in the ash storehouse.
The system comprises an absorption tower and a dust remover ash bucket communicated with the absorption tower; the absorption tower is communicated with the ash storehouse through the bed building and replacing device, and the bed building and replacing device is used for conveying the active ash in the ash storehouse to the absorption tower. By adding the bed building replacement device, the problem of long starting time of the circulating fluidized bed semi-dry method system is solved, the starting and the stopping are convenient, manual sealing tank truck loading, ash unloading and transportation are replaced, the stable fluidized bed layer is quickly built in the circulating fluidized bed semi-dry method absorption tower, the bed building time is shortened by 60%, and the rapidity and the stability of the system are improved.
In a further technical scheme, a pipeline between the absorption tower and the control and regulation device is also communicated with the ash hopper of the dust remover so as to replace high-calcium ash in the ash hopper of the dust remover with active ash in the ash storehouse. Through regular ash conveying replacement, the balance of circulating ash and the balance of water content are kept, the problems of hardening, ash blocking and the like of circulating ash water absorption lumps are solved, the stability, the reliability and the flexibility of system operation are improved, and the environmental protection risk is reduced.
In addition, the system can be put into operation at any time, and the ash conveying flow can be accurately controlled according to the operation parameters of the system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a circulating ash bed building and replacement system according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of the bed building and replacement apparatus of FIG. 1.
The reference numerals in fig. 1, 2 are as follows:
1-ash storehouse, 2-bed building replacement device, 3-control adjusting device, 4-absorption tower, 5-gas air supply device, 6-program control device, 7-dust remover ash bucket;
2.1-feeding valve, 2.2 level meter, 2.3-fluidizing air chamber, 2.4-injecting pipe, 2.5, balance exhaust valve, 2.6, compressed air inlet valve, 2.7-gasification valve and 2.8 output valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the present invention is to provide a circulating ash bed-building replacement system, please refer to fig. 1, where fig. 1 is a schematic structure of a circulating ash bed-building replacement system according to an embodiment of the present invention.
In a specific embodiment, the main part of the circulating ash bed building and replacing system provided by the invention comprises an absorption tower 4, a dust remover ash hopper 7 communicated with the absorption tower 4 and a bed building and replacing device 2.
One side of the bed building and replacing device 2 is communicated with the
A control and regulation device 3 can be arranged between the bed building displacement device 2 and the absorption tower 4 and used for regulating the ash conveying flow of the bed building displacement device 2.
In addition, a gas supplementing device 5 can be arranged, and the gas supplementing device 5 is connected to a pipeline between the absorption tower 4 and the control and regulation device 3, so that the gas flow in the related pipeline can be regulated and controlled.
The control and regulation device 3 and the gas supply device 5 can be in signal connection with the program control device 6, so that the latter can perform necessary adjustment on the working state of the control and regulation device 3 and the gas supply device 5.
The control and regulation device 3 can regulate the feeding frequency in the bed building and replacing device 2 through the set time, and the conveying frequency is increased or reduced through the set time, so that the aim of regulating the ash conveying flow is fulfilled.
In order to realize the replacement of the circulating ash, a pipeline between the absorption tower 4 and the control and regulation device 3 is further communicated with the ash hopper 7 of the dust remover, so that the high-calcium ash in the ash hopper 7 of the dust remover can be replaced by the active ash in the
Referring to fig. 2, fig. 2 is a schematic structural diagram of the bed building and replacing device in fig. 1.
In one embodiment, the bed building and replacing device 2 further comprises a feeding valve 2.1, and is connected with the
A material level meter 2.2, a fluidization air chamber 2.3, a spraying material pipe 2.4, a balance exhaust valve 2.5, a gasification valve 2.7 and the like can also be arranged in the bed building replacement device 2.
During operation, the program control device 6 is controlled by the electromagnetic valve box, firstly the balance exhaust valve 2.5 is opened, then the feeding valve 2.1 is opened, and at the moment, materials on the upper part of the feeding port are added from the feeding port. The material can be controlled in accordance with a program, for example by the feed time or by the fill level indicator 2.2.
The program control device 6 closes the feed valve 2.1 and the balance exhaust valve 2.5 according to the program setting, simultaneously opens the compressed air inlet valve 2.6, the compressed air is divided into three paths to enter the bed building replacement device 2 body, and provides the internal pressurizing, fluidizing and conveying air source for the device, so that the material is fully fluidized, and the fluidized material is blown out through the injection material pipe 2.4.
When the material is conveyed, the resistance in the pipeline is greatly reduced, the pressure is low, and the program control automatically closes the compressed air inlet valve 2.6, so that the second working cycle is started. The program control device can also be provided with two working modes of automation and manual operation for field operation.
The system solves the problem of long start-up time of the circulating fluidized bed semi-dry method system by adding the bed building replacement device, is convenient to start and stop, replaces manual-based sealed tank truck loading, ash unloading and transportation, realizes the quick establishment of a stable fluidized bed layer in the circulating fluidized bed semi-dry method absorption tower, shortens the bed building time by 60 percent, and improves the rapidity and the stability of the system.
In a further technical scheme, a pipeline between the absorption tower and the control and regulation device is also communicated with the ash hopper of the dust remover so as to replace high-calcium ash in the ash hopper of the dust remover with active ash in the ash storehouse. Through regular ash conveying replacement, the balance of circulating ash and the balance of water content are kept, the problems of hardening, ash blocking and the like of circulating ash water absorption lumps are solved, the stability, the reliability and the flexibility of system operation are improved, and the environmental protection risk is reduced.
In addition, the system can be put into operation at any time, and the ash conveying flow can be accurately controlled according to the operation parameters of the system.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The circulating ash bed building and replacing system provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
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