CN104457342A - Heat exchanger control method and heat exchanger - Google Patents
Heat exchanger control method and heat exchanger Download PDFInfo
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- CN104457342A CN104457342A CN201410635162.2A CN201410635162A CN104457342A CN 104457342 A CN104457342 A CN 104457342A CN 201410635162 A CN201410635162 A CN 201410635162A CN 104457342 A CN104457342 A CN 104457342A
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Abstract
The invention discloses a heat exchanger control method and a heat exchanger and relates to the technical field of heat exchangers. By means of the heat exchanger control method, the problems that a heat exchange tube is low in heat transfer efficiency and high in cost by the adoption of an existing heat exchanger control process can be solved. The heat exchanger control method comprises the steps of obtaining a pressure difference value between shell pass pressure and tube pass pressure of the heat exchanger, comparing the pressure difference value with a pressure-bearing threshold value of the heat exchange tube in the heat exchanger, and adjusting the shell pass pressure and/or the tube pass pressure according to a comparison result. The heat exchanger control method is suitable for the heat exchangers and can be used for lowering the cost of the heat exchangers and improving the operating stability of the heat exchangers.
Description
Technical field
The present invention relates to technical field of heat exchangers, particularly relate to a kind of control method and heat exchanger of heat exchanger.
Background technology
In order to ensure safety, the stable operation of heat exchanger, on the one hand, the structural design of heat exchanger itself and safety prevention measure etc. need to meet the requirements; On the other hand, the control in heat exchanger running also wants rationally correct.In existing heat exchanger control flow, the pressure of tube side fluid and the pressure of shell-side fluid is detected by pressure checking device, respectively the pressure of tube side fluid and the pressure of shell-side fluid are adjusted according to the force value detected, make force value meet the designing requirement of heat exchanger tube in heat exchanger, thus ensure safety, the stable operation of heat exchanger.
In prior art, at least there are the following problems: according to existing heat exchanger control flow, need when designing heat exchanger tube to consider for the pressure of tube side and the pressure of shell side respectively, namely heat exchanger tube is wanted to sustain the maximum pressure of tube side fluid or the maximum pressure of shell-side fluid, this just requires that the thickness of heat exchanger tube enough thickly just must can sustain this pressure, thus causes that the heat transfer efficiency of heat exchanger tube is low and cost is higher.
Summary of the invention
Embodiments of the invention provide a kind of control method and heat exchanger of heat exchanger, can solve existing heat exchanger control flow and cause the heat transfer efficiency of heat exchanger tube low and the higher problem of cost.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of heat exchanger control method, comprising:
Obtain the pressure difference value between the shell side pressure of heat exchanger and tube side pressure;
The pressure-bearing threshold value of heat exchanger tube in described pressure difference value and described heat exchanger is compared;
Described shell side pressure and/or described tube side pressure is regulated according to comparative result.
Preferably, the pressure difference value between the shell side pressure of described acquisition heat exchanger and tube side pressure comprises: set up Data Base of Chemical Compound according to the dielectric property in heat exchanger, and described Data Base of Chemical Compound comprises the physical parameter of medium and the physical dimension parameter of heat exchanger; Calculate described pressure difference value in real time according to described Data Base of Chemical Compound and obtain the change trend curve of described pressure difference value.
Preferably, describedly calculate described pressure difference value in real time according to described Data Base of Chemical Compound and comprise: the voltage drop value and the force value that calculate shell-side outlet according to shell side inlet condition parameters in described Data Base of Chemical Compound; Voltage drop value and the force value of tube side outlet is calculated according to tube-side inlet conditional parameter in described Data Base of Chemical Compound; The force value that the force value of tube-side inlet in the force value of the shell side inlet in shell side inlet conditional parameter, tube-side inlet conditional parameter, the force value of shell-side outlet and tube side export is done subtraction taking absolute value between two, obtains described pressure difference value.
Further, described being compared with the pressure-bearing threshold value of heat exchanger tube in described heat exchanger by described pressure difference value comprises: maximum pressure difference corresponding in the change trend curve of described pressure difference value and described pressure-bearing threshold value are compared.
Further, describedly described shell side pressure and/or described tube side pressure is regulated to comprise according to comparative result: when described maximum pressure difference is more than or equal to described pressure-bearing threshold value, reduced the flow of shell-side outlet and/or tube side outlet by pumping unit, or reduce the pressure of shell-side outlet and/or tube side outlet by regulator.
Optionally, the pressure difference value between the shell side pressure of described acquisition heat exchanger and tube side pressure comprises: detect shell side inlet pressure, shell-side outlet pressure, tube-side inlet pressure and tube side outlet pressure; Calculate the first pressure difference value, the second pressure difference value and the 3rd pressure difference value, wherein, described first pressure difference value is the absolute value of the pressure difference value between described shell side inlet pressure and described tube-side inlet pressure, described second pressure difference value is the absolute value of the pressure difference value between described shell-side outlet pressure and described tube side outlet pressure, and described 3rd pressure difference value is the absolute value of pressure difference value between described shell side inlet pressure and described tube side outlet pressure or the absolute value for the pressure difference value between described shell-side outlet pressure and described tube-side inlet pressure.
Further, the described pressure-bearing threshold value of heat exchanger tube in described pressure difference value and described heat exchanger being compared comprises: the pressure-bearing threshold value of heat exchanger tube in the maximum in described first pressure difference value, described second pressure difference value and described 3rd pressure difference value and described heat exchanger compared.
Further, describedly described shell side pressure and/or described tube side pressure is regulated to comprise according to comparative result: when described maximum is more than or equal to described pressure-bearing threshold value, reduced the flow of shell-side outlet and/or tube side outlet by pumping unit, or reduce the pressure of shell-side outlet and/or tube side outlet by regulator.
A kind of heat exchanger using heat exchanger control method as above.
The heat exchanger control method that the embodiment of the present invention provides and heat exchanger, by measuring the pressure difference value between the tube side pressure of heat exchanger and shell side pressure, making comparisons with this pressure difference value and heat exchanger tube pressure-bearing threshold value and to regulate shell side pressure and tube side pressure.Compared with shell side pressure or tube side pressure being made comparisons with heat exchanger tube pressure-bearing threshold value with prior art, because the pressure difference value between tube side pressure and shell side pressure will much smaller than independent shell side pressure or tube side pressure, and the size of the pressure-bearing threshold value of heat exchanger tube is determined by the pressure difference value of making comparisons with it, namely heat exchanger tube only needs the pressure differential of bearing inside and outside pipe.Therefore, when pressure difference value is less, pressure-bearing threshold value also can reduce accordingly, is embodied in the structure of heat exchanger tube, and namely the thickness of heat exchanger tube can correspondingly reduce, thus the heat transfer efficiency of heat exchanger tube is promoted, and production cost reduces.
Accompanying drawing explanation
The heat exchanger control method that Fig. 1 provides for the embodiment of the present invention one;
The heat exchanger control method that Fig. 2 provides for the embodiment of the present invention two;
The heat exchanger control method that Fig. 3 provides for the embodiment of the present invention three.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
For making the advantage of technical solution of the present invention clearly, below in conjunction with drawings and Examples, the present invention is elaborated.
Embodiment one
The embodiment of the present invention provides a kind of heat exchanger control method, and with the inside and outside differential pressure of heat exchanger tube in heat exchanger for foundation, shell side pressure and/or the tube side pressure of heat exchanger regulate, and as shown in Figure 1, described method comprises:
101, the pressure difference value between the shell side pressure of heat exchanger and tube side pressure is obtained.
102, the pressure-bearing threshold value of heat exchanger tube in pressure difference value and heat exchanger is compared.
103, shell side pressure and/or tube side pressure is regulated according to comparative result.
The heat exchanger control method that the embodiment of the present invention provides, by measuring the pressure difference value between the tube side pressure of heat exchanger and shell side pressure, is made comparisons with this pressure difference value and heat exchanger tube pressure-bearing threshold value and to be regulated shell side pressure and tube side pressure.Compared with shell side pressure or tube side pressure being made comparisons with heat exchanger tube pressure-bearing threshold value with prior art, because the pressure difference value between tube side pressure and shell side pressure will much smaller than independent shell side pressure or tube side pressure, and the size of the pressure-bearing threshold value of heat exchanger tube is determined by the pressure difference value of making comparisons with it, namely heat exchanger tube only needs the pressure differential of bearing inside and outside pipe.Therefore, when pressure difference value is less, pressure-bearing threshold value also can reduce accordingly, is embodied in the structure of heat exchanger tube, and namely the thickness of heat exchanger tube can correspondingly reduce, thus the heat transfer efficiency of heat exchanger tube is promoted, and production cost reduces.
Embodiment two
The embodiment of the present invention provides a kind of heat exchanger control method, heat exchanger control procedure primary computer controls automatically, computer receives imports and exports by with heat exchanger tube pass and shell side the relevant parameter that the checkout equipment that is connected sends, the inside and outside differential pressure of heat exchanger tube in heat exchanger is calculated by the derivation of equation, and dope the trend of inside and outside differential pressure, regulate in advance according to the shell side pressure of the trend heat exchanger of inside and outside differential pressure and/or tube side pressure, as shown in Figure 2, described method comprises:
201, Data Base of Chemical Compound is set up according to the dielectric property in heat exchanger.
Wherein, Data Base of Chemical Compound comprises the physical parameter of medium and the physical dimension parameter of heat exchanger.Such as, the physical parameter of medium comprises: the temperature of medium gas-liquid two-phase, pressure, enthalpy, gas phase mole component, density, viscosity, thermal conductivity factor, thermal capacitance, surface tension, critical-temperature and critical pressure etc.Above-mentioned parameter obtains by the checkout equipment being arranged at tube-side inlet or shell side inlet place.
202, calculate the pressure difference value between the shell side pressure of heat exchanger and tube side pressure in real time according to Data Base of Chemical Compound and obtain the change trend curve of pressure difference value.
Such as, above-mentioned Computing Principle be the fundamental equation that calculates at piping loss basis on further extended derivation out, basic calculating equation is as follows:
wherein, Δ P represents pressure drop, and unit is Pascal (Pa); λ is nondimensional coefficient, is called coefficient of friction, and it is the function of Reynolds number or the function of Reynolds number and tracheid shape properties; L is the length of pipeline, and unit is rice (m); D is the internal diameter of pipeline, and unit is rice (m); ρ is the density of medium, and unit is kilogram every cubic metre of (kg/m
3); U is the flow velocity of medium, and unit is metre per second (m/s) (m/s).By above-mentioned formula, when measuring the pressure of tube-side inlet or shell side inlet, indirectly can calculate the pressure of tube side outlet or shell-side outlet.Like this, tube-side inlet pressure, tube side outlet pressure, shell side inlet pressure and shell-side outlet pressure are just obtained for, and by the pressure difference value between these four pressure, can know pressure distribution situation roughly in heat exchanger.
Further, by ceaselessly obtaining the real time data of porch, the curve of the pressure difference value in a period of time can be obtained, can the variation tendency of monitoring pressure difference by this curve.
Whether maximum pressure difference corresponding in the change trend curve 203, judging pressure difference value is more than or equal to the pressure-bearing threshold value of heat exchanger tube, if maximum pressure difference is more than or equal to the pressure-bearing threshold value of heat exchanger tube, then performs step 204; Otherwise, perform step 206.
204, flow regulating signal is fed back according to maximum pressure difference to pumping unit, or to regulator feedback pressure conditioning signal.
205, reduced the flow of shell-side outlet and/or tube side outlet by pumping unit, or reduce the pressure of shell-side outlet and/or tube side outlet by regulator.
Concrete, pumping unit can pass through flow controller, suitable reduction rate of discharge, is ensureing that under rear end pressure-regulating valve or the constant condition of regulator setting model, the pressure drop that rate of discharge reduces to make fluid flow through pressure-regulating valve or other regulators can reduce thereupon.Namely the regulator of rear end keeps incessantly original pressure, because the transmission action of pressure is very fast, correspondingly, the pressure of pump discharge also can decrease, namely reduce the absolute value of heat exchanger entrance pressure, thus reduce pressure difference, real-time ensuring pressure-difference fluctuation controls at zone of reasonableness.
It should be noted that, although flow is different from the regulating measure of pressure, final result is all the change of the outlet absolute pressure value that can cause pumping unit, consequently.
Optionally, above-mentioned adjustment process, also by controlling heat exchanger tube pass outlet and the pressure-regulating valve of shell-side outlet or regulator as pressure-reducing valve, counterbalance valve, restriction orifice etc., suitable reduction outlet pressure, and then control pressure-difference fluctuation within zone of reasonableness, concrete regulative mode is not limited herein.
206, the current control state of pumping unit and/or regulator is kept.
The heat exchanger control method that the embodiment of the present invention provides, by measuring the pressure difference value between the tube side pressure of heat exchanger and shell side pressure, is made comparisons with this pressure difference value and heat exchanger tube pressure-bearing threshold value and to be regulated shell side pressure and tube side pressure.Compared with shell side pressure or tube side pressure being made comparisons with heat exchanger tube pressure-bearing threshold value with prior art, because the pressure difference value between tube side pressure and shell side pressure will much smaller than independent shell side pressure or tube side pressure, and the size of the pressure-bearing threshold value of heat exchanger tube is determined by the pressure difference value of making comparisons with it, namely heat exchanger tube only needs the pressure differential of bearing inside and outside pipe.Therefore, when pressure difference value is less, pressure-bearing threshold value also can reduce accordingly, is embodied in the structure of heat exchanger tube, and namely the thickness of heat exchanger tube can correspondingly reduce, thus the heat transfer efficiency of heat exchanger tube is promoted, and production cost reduces.Further, can by the automatic control of computer according to entry condition and then calculate mouth pressure, obtain a result faster than the pressure energy directly measuring outlet, therefore, it is possible to quickly according to result to pumping unit or regulator feedback adjustment signal, ensure that further heat exchanger is stable, run safely.
Embodiment three
The embodiment of the present invention provides a kind of heat exchanger control method, heat exchanger control procedure primary computer controls automatically, computer receives imports and exports by with heat exchanger tube pass and shell side the actual pressure value that the pressure checking device that is connected sends, the inside and outside differential pressure of heat exchanger tube in heat exchanger is obtained by subtraction, regulate according to the shell side pressure of inside and outside differential pressure heat exchanger and/or tube side pressure, as shown in Figure 3, described method comprises:
301, shell side inlet pressure, shell-side outlet pressure, tube-side inlet pressure and tube side outlet pressure is detected.
302, the first pressure difference value, the second pressure difference value and the 3rd pressure difference value is calculated.
Wherein, first pressure difference value is the absolute value of the pressure difference value between shell side inlet pressure and tube-side inlet pressure, second pressure difference value is the absolute value of the pressure difference value between shell-side outlet pressure and tube side outlet pressure, and the 3rd pressure difference value is the absolute value of pressure difference value between shell side inlet pressure and tube side outlet pressure or the absolute value for the pressure difference value between shell-side outlet pressure and tube-side inlet pressure.
303, judge whether the maximum in the first pressure difference value, described second pressure difference value and described 3rd pressure difference value is more than or equal to the pressure-bearing threshold value of heat exchanger tube in heat exchanger, if maximum is more than or equal to the pressure-bearing threshold value of heat exchanger tube, then perform step 304; Otherwise, perform step 306.
304, flow regulating signal is fed back according to maximum to pumping unit, or to regulator feedback pressure conditioning signal.
305, reduced the flow of shell-side outlet and/or tube side outlet by pumping unit, or reduce the pressure of shell-side outlet and/or tube side outlet by regulator.
Concrete, pumping unit can pass through flow controller, suitable reduction rate of discharge, is ensureing that under rear end pressure-regulating valve or the constant condition of regulator setting model, the pressure drop that rate of discharge reduces to make fluid flow through pressure-regulating valve or other regulators can reduce thereupon.Namely the regulator of rear end keeps incessantly original pressure, because the transmission action of pressure is very fast, correspondingly, the pressure of pump discharge also can decrease, namely reduce the absolute value of heat exchanger entrance pressure, thus reduce pressure difference, real-time ensuring pressure-difference fluctuation controls at zone of reasonableness.
It should be noted that, although flow is different from the regulating measure of pressure, final result is all the change of the outlet absolute pressure value that can cause pumping unit, consequently.
Optionally, above-mentioned adjustment process, also by controlling heat exchanger tube pass outlet and the pressure-regulating valve of shell-side outlet or regulator as pressure-reducing valve, counterbalance valve, restriction orifice etc., suitable reduction outlet pressure, and then control pressure-difference fluctuation within zone of reasonableness, concrete regulative mode is not limited herein.
306, the current control state of pumping unit and/or regulator is kept.
The heat exchanger control method that the embodiment of the present invention provides, by measuring the pressure difference value between the tube side pressure of heat exchanger and shell side pressure, is made comparisons with this pressure difference value and heat exchanger tube pressure-bearing threshold value and to be regulated shell side pressure and tube side pressure.Compared with shell side pressure or tube side pressure being made comparisons with heat exchanger tube pressure-bearing threshold value with prior art, because the pressure difference value between tube side pressure and shell side pressure will much smaller than independent shell side pressure or tube side pressure, and the size of the pressure-bearing threshold value of heat exchanger tube is determined by the pressure difference value of making comparisons with it, namely heat exchanger tube only needs the pressure differential of bearing inside and outside pipe.Therefore, when pressure difference value is less, pressure-bearing threshold value also can reduce accordingly, is embodied in the structure of heat exchanger tube, and namely the thickness of heat exchanger tube can correspondingly reduce, thus the heat transfer efficiency of heat exchanger tube is promoted, and production cost reduces.
Embodiment four
The embodiment of the present invention provides a kind of heat exchanger using heat exchanger control method described in above-described embodiment.
The heat exchanger that the embodiment of the present invention provides, by measuring the pressure difference value between the tube side pressure of heat exchanger and shell side pressure, is made comparisons with this pressure difference value and heat exchanger tube pressure-bearing threshold value and to be regulated shell side pressure and tube side pressure.Compared with shell side pressure or tube side pressure being made comparisons with heat exchanger tube pressure-bearing threshold value with prior art, because the pressure difference value between tube side pressure and shell side pressure will much smaller than independent shell side pressure or tube side pressure, and the size of the pressure-bearing threshold value of heat exchanger tube is determined by the pressure difference value of making comparisons with it, namely heat exchanger tube only needs the pressure differential of bearing inside and outside pipe.Therefore, when pressure difference value is less, pressure-bearing threshold value also can reduce accordingly, is embodied in the structure of heat exchanger tube, and namely the thickness of heat exchanger tube can correspondingly reduce, thus the heat transfer efficiency of heat exchanger tube is promoted, and production cost reduces.
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
In describing the invention, it should be noted that, when element is called as " being fixed on " or " being arranged at " another element, it can directly on another element or may there is centering elements simultaneously.When an element is known as " being connected to " another element, it can be directly connected to another element or may there is centering elements simultaneously.
In the description of this description, specific features, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (9)
1. a heat exchanger control method, is characterized in that, comprising:
Obtain the pressure difference value between the shell side pressure of heat exchanger and tube side pressure;
The pressure-bearing threshold value of heat exchanger tube in described pressure difference value and described heat exchanger is compared;
Described shell side pressure and/or described tube side pressure is regulated according to comparative result.
2. heat exchanger control method according to claim 1, is characterized in that, the pressure difference value between the shell side pressure of described acquisition heat exchanger and tube side pressure comprises:
Set up Data Base of Chemical Compound according to the dielectric property in heat exchanger, described Data Base of Chemical Compound comprises the physical parameter of medium and the physical dimension parameter of heat exchanger;
Calculate described pressure difference value in real time according to described Data Base of Chemical Compound and obtain the change trend curve of described pressure difference value.
3. heat exchanger control method according to claim 2, is characterized in that, describedly calculates described pressure difference value in real time according to described Data Base of Chemical Compound and comprises:
Voltage drop value and the force value of shell-side outlet is calculated according to shell side inlet condition parameters in described Data Base of Chemical Compound;
Voltage drop value and the force value of tube side outlet is calculated according to tube-side inlet conditional parameter in described Data Base of Chemical Compound;
The force value that the force value of tube-side inlet in the force value of the shell side inlet in shell side inlet conditional parameter, tube-side inlet conditional parameter, the force value of shell-side outlet and tube side export is done subtraction taking absolute value between two, obtains described pressure difference value.
4. heat exchanger control method according to claim 2, is characterized in that, the described pressure-bearing threshold value of heat exchanger tube in described pressure difference value and described heat exchanger being compared comprises:
Maximum pressure difference corresponding in the change trend curve of described pressure difference value and described pressure-bearing threshold value are compared.
5. heat exchanger control method according to claim 4, is characterized in that, describedly regulates described shell side pressure and/or described tube side pressure to comprise according to comparative result:
When described maximum pressure difference is more than or equal to described pressure-bearing threshold value, reduced the flow of shell-side outlet and/or tube side outlet by pumping unit, or reduce the pressure of shell-side outlet and/or tube side outlet by regulator.
6. heat exchanger control method according to claim 1, is characterized in that, the pressure difference value between the shell side pressure of described acquisition heat exchanger and tube side pressure comprises:
Detect shell side inlet pressure, shell-side outlet pressure, tube-side inlet pressure and tube side outlet pressure;
Calculate the first pressure difference value, the second pressure difference value and the 3rd pressure difference value, wherein, described first pressure difference value is the absolute value of the pressure difference value between described shell side inlet pressure and described tube-side inlet pressure, described second pressure difference value is the absolute value of the pressure difference value between described shell-side outlet pressure and described tube side outlet pressure, and described 3rd pressure difference value is the absolute value of pressure difference value between described shell side inlet pressure and described tube side outlet pressure or the absolute value for the pressure difference value between described shell-side outlet pressure and described tube-side inlet pressure.
7. heat exchanger control method according to claim 6, is characterized in that, the described pressure-bearing threshold value of heat exchanger tube in described pressure difference value and described heat exchanger being compared comprises:
The pressure-bearing threshold value of heat exchanger tube in maximum in described first pressure difference value, described second pressure difference value and described 3rd pressure difference value and described heat exchanger is compared.
8. heat exchanger control method according to claim 7, is characterized in that, describedly regulates described shell side pressure and/or described tube side pressure to comprise according to comparative result:
When described maximum is more than or equal to described pressure-bearing threshold value, reduced the flow of shell-side outlet and/or tube side outlet by pumping unit, or reduce the pressure of shell-side outlet and/or tube side outlet by regulator.
9. one kind uses the heat exchanger of the heat exchanger control method as described in any one of claim 1-8.
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| CN114508756A (en) * | 2022-02-28 | 2022-05-17 | 中国铁建重工集团股份有限公司 | Air preheating and air distribution system of incinerator |
| CN114659388A (en) * | 2021-12-24 | 2022-06-24 | 中国联合工程有限公司 | Smoke discharging and cooling device for hydrogen combustion engine combustor test bed and using method thereof |
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| CN114659388A (en) * | 2021-12-24 | 2022-06-24 | 中国联合工程有限公司 | Smoke discharging and cooling device for hydrogen combustion engine combustor test bed and using method thereof |
| CN114508756A (en) * | 2022-02-28 | 2022-05-17 | 中国铁建重工集团股份有限公司 | Air preheating and air distribution system of incinerator |
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| Publication number | Publication date |
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| CN104457342B (en) | 2016-05-18 |
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