CN205048411U - Gas boiler - Google Patents
Gas boiler Download PDFInfo
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- CN205048411U CN205048411U CN201520683967.4U CN201520683967U CN205048411U CN 205048411 U CN205048411 U CN 205048411U CN 201520683967 U CN201520683967 U CN 201520683967U CN 205048411 U CN205048411 U CN 205048411U
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- water preheater
- flue gas
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Abstract
本实用新型公开了一种燃气锅炉，解决了现有燃气锅炉能耗高、热能回收率较低、投资成本和运行成本低的问题。技术方案包括设有汽包的炉体，炉体出口依次连接过热器、省煤器、引风机和烟囱，所述炉体进口与送风机连接，所述省煤器经除盐水预热器与引风机连接，所述除盐水预热器的除盐水出口经除氧器与汽包连接。本实用新型结构简单、热能利用率高、投资成本和运行成本低。
The utility model discloses a gas boiler, which solves the problems of high energy consumption, low heat energy recovery rate, low investment cost and low operation cost of the existing gas boiler. The technical solution includes a furnace body with a steam drum, the outlet of the furnace body is connected to a superheater, a coal economizer, an induced draft fan and a chimney in sequence, the inlet of the furnace body is connected to a blower fan, and the economizer is connected to the induced draft fan through a desalted water preheater. The fan is connected, and the desalted water outlet of the desalted water preheater is connected with the steam drum through the deaerator. The utility model has the advantages of simple structure, high utilization rate of heat energy, and low investment cost and operation cost.
Description
技术领域technical field
本实用新型涉及一种燃气锅炉。The utility model relates to a gas boiler.
背景技术Background technique
锅炉是指利用各种燃料、电或者其他能源，将所盛装的液体加热到一定的参数，并对外输出热能的设备。燃气锅炉以其清洁能源的特性，在当今社会环保压力不断增加的形势下，得到更加广泛的应用。Boiler refers to the equipment that uses various fuels, electricity or other energy sources to heat the liquid contained in it to a certain parameter and output heat energy to the outside. With its clean energy characteristics, gas-fired boilers have been more widely used under the increasing pressure of environmental protection in today's society.
传统大中型燃气锅炉装置，在系统流程上基本类似：送风机将冷空气送入空预器，与烟气换热后，进入燃烧器和燃气混合燃烧，燃烧产生的烟气经过热器、省煤器、空预器换热后，经引风机(正压通风锅炉无)排入烟囱。因此，相同产汽量的锅炉，在投资及运行成本方面，无太大差别。因此，开发一种初始投资低，运行经济的燃气锅炉装置是很有必要的。Traditional large and medium-sized gas boiler installations are basically similar in terms of system flow: the blower sends cold air into the air preheater, and after exchanging heat with flue gas, it enters the burner and combusts with gas, and the flue gas generated by combustion passes through the heater, saving coal After exchanging heat with the device and air preheater, it is discharged into the chimney through the induced draft fan (no positive pressure ventilation boiler). Therefore, there is not much difference in investment and operating costs between boilers with the same steam production. Therefore, it is necessary to develop a gas-fired boiler device with low initial investment and economical operation.
发明内容Contents of the invention
本实用新型的目的是为了解决上述技术问题，提供一种结构简单、热能利用率高、投资成本和运行成本低的燃气锅炉。The purpose of the utility model is to solve the above technical problems and provide a gas boiler with simple structure, high utilization rate of heat energy, low investment cost and operation cost.
技术方案包括设有汽包的炉体，炉体出口依次连接过热器、省煤器、引风机和烟囱，所述炉体进口与送风机连接，所述省煤器经除盐水预热器与引风机连接，所述除盐水预热器的除盐水出口经除氧器与汽包连接。The technical solution includes a furnace body with a steam drum, the outlet of the furnace body is connected to a superheater, a coal economizer, an induced draft fan and a chimney in sequence, the inlet of the furnace body is connected to a blower fan, and the economizer is connected to the induced draft fan through a desalted water preheater. The fan is connected, and the desalted water outlet of the desalted water preheater is connected with the steam drum through the deaerator.
所述除盐水预热器的烟气出口管道上设有烟气温度信号传感器，所述除盐水预热器的除盐水进口管道上设有第一流量调节阀，所述第一流量调节阀的控制器与所述烟气温度信号传感器连接。The flue gas outlet pipe of the desalted water preheater is provided with a flue gas temperature signal sensor, the desalted water inlet pipe of the desalted water preheater is provided with a first flow regulating valve, and the first flow regulating valve The controller is connected with the flue gas temperature signal sensor.
所述除盐水预热器的除盐水进口和除氧器进口之间还连接有旁路管道。A bypass pipeline is also connected between the desalted water inlet of the desalted water preheater and the deaerator inlet.
所述除氧器上设有液位传感器，所述旁路管道上设有第二流量调节阀，所述第二流量调节阀的控制器与所述液位传感器连接。A liquid level sensor is provided on the deaerator, a second flow regulating valve is provided on the bypass pipeline, and a controller of the second flow regulating valve is connected to the liquid level sensor.
有益效果：Beneficial effect:
(1)不设空预器，减少了本体钢结构载荷，送风机可更为靠近炉体内的燃烧器布置，缩短风道长度，也极大的减少送风机压头；(1) There is no air preheater, which reduces the steel structure load of the body, and the blower can be arranged closer to the burner in the furnace body, shortening the length of the air duct, and greatly reducing the pressure head of the blower;
(2)同时设置除盐水预热器，炉体排出的烟气经除盐水预热器与除盐水换热后再排出，换热效率高，热能回收效果好，排烟温度远低于过去设有空预器的传统锅炉，可降低排烟温度约60～70℃；而除盐水经除盐水预热器预热后，进入泡包的前温度更高，从而有效降低生产水蒸汽所需要的能耗，进一步节能降耗。(2) A desalted water preheater is installed at the same time. The flue gas discharged from the furnace body is discharged after heat exchange between the desalted water preheater and the desalted water. The heat exchange efficiency is high, the heat energy recovery effect is good, and the exhaust gas temperature is much lower than that of the previous design A traditional boiler with an air preheater can reduce the exhaust gas temperature by about 60-70°C; and after the desalted water is preheated by the desalted water preheater, the temperature before entering the bubble bag is higher, thereby effectively reducing the required water vapor production. Energy consumption, further saving energy and reducing consumption.
(3)通过烟气温度信号传感器获取出除盐水预热器的烟气温度，以控制进入除盐水预热器的除盐水的流量，保证热能的有效回收；通过液位传感器获取除氧器内液位高度，以控制由旁路管道进入除氧器内除盐水的流量，以使除氧器内液位控制在要求范围内，控制简单自动。(3) Obtain the flue gas temperature of the desalted water preheater through the flue gas temperature signal sensor to control the flow of desalted water entering the desalted water preheater to ensure effective recovery of heat energy; The height of the liquid level is used to control the flow of desalted water entering the deaerator from the bypass pipe, so that the liquid level in the deaerator can be controlled within the required range, and the control is simple and automatic.
(4)本实用新型具有初始投资低，运行经济，节能高效的优点，有良好的应用前景。以一台150t/h燃气锅炉为例，将节省风道用钢材及钢结构钢材约40t，设置除盐水预热器与空预器的成本相当，但由于除盐水初始温度低，使得出口烟气温度比传统锅炉更低，按照烟气量为15.6×104Nm3/h计算，多回收的能量为4290kW；由于不设空预器，送风机所需压头将减少～1600Pa，因此送风机功率将减少～80kw。(4) The utility model has the advantages of low initial investment, economical operation, energy saving and high efficiency, and has a good application prospect. Taking a 150t/h gas-fired boiler as an example, it will save about 40t of steel for the air duct and steel structure. The cost of installing the desalted water preheater is equivalent to that of the air preheater. However, due to the low initial temperature of the desalted water, the outlet flue gas The temperature is lower than that of traditional boilers. Calculated according to the flue gas volume of 15.6×10 4 Nm 3 /h, the additional energy recovered is 4290kW; since there is no air preheater, the pressure head required by the blower will be reduced by ~1600Pa, so the power of the blower will be reduced Reduce ~ 80kw.
附图说明Description of drawings
图1为本实用新型结构示意图。Fig. 1 is the structural representation of the utility model.
其中，1-送风机；2-炉体；3-过热器；4-省煤器、5-除盐水预热器；6-旁路管道；7-烟气温度信号传感器；8-引风机；9-烟囱；10-除氧器；11-锅炉给水泵；12-液位传感器、13-汽包、14-第一流量调节阀、15-第二流量调节阀。Among them, 1- blower; 2- furnace body; 3- superheater; 4- economizer, 5- desalted water preheater; 6- bypass pipe; 7- flue gas temperature signal sensor; 8- induced draft fan; 9 - chimney; 10 - deaerator; 11 - boiler feed water pump; 12 - liquid level sensor, 13 - steam drum, 14 - first flow regulating valve, 15 - second flow regulating valve.
具体实施方式detailed description
参照图1，本实用新型包括设有汽包13的炉体2，炉体2出口依次连接过热器3、省煤器4、除盐水预热器5的管侧或壳侧、引风机8和烟囱9，所述炉体2进口与送风机1连接，所述省煤器4经与引风机连接，所述除盐水预热器壳侧或管侧的除盐水进口可通入除盐水，除盐水出口经除氧器、锅炉给水泵11与汽包连接。Referring to Fig. 1, the utility model includes a furnace body 2 provided with a steam drum 13, and the outlet of the furnace body 2 is sequentially connected to the superheater 3, the economizer 4, the tube side or shell side of the desalted water preheater 5, the induced draft fan 8 and the Chimney 9, the inlet of the furnace body 2 is connected to the air blower 1, the economizer 4 is connected to the induced draft fan, and the desalted water inlet on the shell side or tube side of the desalted water preheater can be connected to the desalted water, and the desalted water The outlet is connected to the steam drum through the deaerator and the boiler feed water pump 11.
所述除盐水预热器5的烟气出口管道上设有烟气温度信号传感器7，所述除盐水预热器5的除盐水进口管道上设有第一流量调节阀14，所述第一流量调节阀14的控制器与所述烟气温度信号传感器7连接；所述除盐水预热器5的除盐水进口和除氧器10进口之间还连接有旁路管道6。所述除氧器10上设有液位传感器12，所述旁路管道6上设有第二流量调节阀15，所述第二流量调节阀15的控制器与所述液位传感器12连接。The flue gas outlet pipe of the desalted water preheater 5 is provided with a flue gas temperature signal sensor 7, and the desalted water inlet pipe of the desalted water preheater 5 is provided with a first flow regulating valve 14, and the first The controller of the flow regulating valve 14 is connected with the flue gas temperature signal sensor 7; a bypass pipe 6 is also connected between the desalted water inlet of the desalted water preheater 5 and the deaerator 10 inlet. The deaerator 10 is provided with a liquid level sensor 12 , and the bypass pipeline 6 is provided with a second flow regulating valve 15 , and the controller of the second flow regulating valve 15 is connected to the liquid level sensor 12 .
工作原理：working principle:
炉体2不设空预器，送风机1将风送入炉体2内的燃烧器内作为所需空气助燃，燃烧产生的烟气经过热器3，省煤器4换热后降至225℃，然后进入除盐水预热器5的壳侧与管侧除盐水进行间接换热，所述除盐水预热器5为管壳式换热器，除盐水分布于管侧，换热后的烟气进一步降温至80℃然后经引风机8送入烟囱9排出，为避免烟气温度过低，对烟道造成腐蚀，应控制所述除盐水预热器5的烟气出口温度高于露点温度，最好为高于露点温度10℃为好。除盐水分成两部分，一部分经第一流量调节阀14进入除盐水预热器5与烟气换热升温至75℃后再送入除氧器10，另一部分则根据需要直接送入除氧器10除氧，出除氧器10的除盐水送入汽包内加热生成蒸汽。进入除盐水预热器5的一部分除盐水流量，可根据除盐水预热器5的烟气出口管道上设置的烟气温度信号传感器7进行调节，当烟气温度过高时，可控制第一流量调节阀14加大进入除盐水预热器5的除盐水流量，反之则降低流量；进入旁路管道6的另一部分除盐水的流量可根据除氧器10上的液位传感器12进行调节，当所述除氧器10液位偏高时，可控制旁路管道6上的第二流量调节阀15，减少或关闭由旁路管道6进入除氧器10内的除盐水流量，反之则增大流量。The furnace body 2 does not have an air preheater, and the air blower 1 sends the wind into the burner in the furnace body 2 as the required air for combustion. The flue gas generated by the combustion passes through the heater 3, and the economizer 4 cools down to 225°C after heat exchange , and then enter the shell side of the desalted water preheater 5 to perform indirect heat exchange with the desalted water on the tube side. The gas is further cooled to 80°C and then sent to the chimney 9 through the induced draft fan 8 to be discharged. In order to avoid the flue gas temperature being too low and causing corrosion to the flue, the flue gas outlet temperature of the desalted water preheater 5 should be controlled to be higher than the dew point temperature , preferably 10°C higher than the dew point temperature. The desalinated water is divided into two parts, one part enters the desalinated water preheater 5 through the first flow regulating valve 14, exchanges heat with the flue gas and raises the temperature to 75°C before being sent to the deaerator 10, and the other part is directly sent to the deaerator 10 as required For deaeration, the desalted water exiting the deaerator 10 is sent into the steam drum to be heated to generate steam. The flow rate of a part of the desalted water entering the desalted water preheater 5 can be adjusted according to the flue gas temperature signal sensor 7 installed on the flue gas outlet pipe of the desalinated water preheater 5. When the flue gas temperature is too high, the first The flow regulating valve 14 increases the flow rate of desalted water entering the desalinated water preheater 5, and vice versa; When the liquid level of the deaerator 10 is high, the second flow regulating valve 15 on the bypass pipeline 6 can be controlled to reduce or close the flow of desalted water entering the deaerator 10 from the bypass pipeline 6; Large Flow.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520683967.4U CN205048411U (en) | 2015-09-06 | 2015-09-06 | Gas boiler |
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| CN201520683967.4U CN205048411U (en) | 2015-09-06 | 2015-09-06 | Gas boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066093A (en) * | 2015-09-06 | 2015-11-18 | 中国五环工程有限公司 | Gas-fire boiler |
| CN107421110A (en) * | 2017-08-18 | 2017-12-01 | 德清县德沃工业设备安装有限公司 | A kind of gas fired-boiler |
| CN108180454A (en) * | 2017-12-27 | 2018-06-19 | 浙江乐科文化发展有限公司 | A kind of power economized boiler temperature control system and its application method |
-
2015
- 2015-09-06 CN CN201520683967.4U patent/CN205048411U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066093A (en) * | 2015-09-06 | 2015-11-18 | 中国五环工程有限公司 | Gas-fire boiler |
| CN107421110A (en) * | 2017-08-18 | 2017-12-01 | 德清县德沃工业设备安装有限公司 | A kind of gas fired-boiler |
| CN108180454A (en) * | 2017-12-27 | 2018-06-19 | 浙江乐科文化发展有限公司 | A kind of power economized boiler temperature control system and its application method |
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