Novel steam cooling energy-saving equipment
阅读说明：本技术 一种新型蒸汽降温节能设备 (Novel steam cooling energy-saving equipment ) 是由 梁缠柱 张洪伟 于 2018-08-13 设计创作，主要内容包括：本发明公开了一种新型蒸汽降温节能设备,属于蒸汽应用和节能领域,其包括：多级降温器、级变调节单元、感应和控制单元、低温旁通单元、多段换热设备。过热蒸汽进入所述多级降温器,被冷凝水降温后向多段换热设备供汽,所述感应和控制单元根据多级降温器出口蒸汽温度来控制级变调节单元和低温旁通单元,所述级变调节单元调节多级降温器的降温级数来实现目标出口温度,所述低温旁通单元在多级降温器出口蒸汽温度低到最低设定值时直接将冷凝水通向多段换热设备的冷凝水加热段。本发明解决了蒸汽较高的过热度严重影响换热设备效率和寿命的问题,而且结构简单、稳定可靠、投资和运行成本低,提高了企业蒸汽系统运行的经济性,降低其蒸汽耗量,有助于企业实现节能增效和减排目的。(The invention discloses a novel steam cooling energy-saving device, which belongs to the field of steam application and energy conservation and comprises: the device comprises a multi-stage cooler, a stage change adjusting unit, an induction and control unit, a low-temperature bypass unit and a multi-stage heat exchange device. Superheated steam enters the multistage cooler, supplies vapour to multistage heat transfer equipment after being cooled by the comdenstion water, response and control unit come control level change regulating unit and low temperature bypass unit according to multistage cooler export steam temperature, the cooling progression that the multistage cooler was adjusted to the level change regulating unit realizes target outlet temperature, low temperature bypass unit directly accesss to multistage heat transfer equipment's comdenstion water heating section with the comdenstion water when multistage cooler export steam temperature is low to minimum setting value. The invention solves the problem that the efficiency and the service life of heat exchange equipment are seriously influenced by higher superheat degree of steam, has simple structure, stability and reliability and low investment and operation cost, improves the economical efficiency of the operation of a steam system of an enterprise, reduces the steam consumption of the enterprise, and is beneficial to the realization of energy conservation, efficiency improvement and emission reduction of the enterprise.)
1. The utility model provides a novel steam cooling economizer which characterized in that: the device comprises a multi-stage cooler (1), a stage change adjusting unit (2), an induction and control unit (3), a low-temperature bypass unit (4) and a multi-stage heat exchange device (5).
2. The novel steam cooling energy-saving device as claimed in claim 1, characterized in that: the superheated steam is cooled by non-contact type cooling.
3. The novel steam cooling energy-saving device as claimed in claim 1, characterized in that: the superheated steam is cooled by condensate water.
4. A novel steam temperature-reducing and energy-saving device as claimed in any one of claims 1 to 3, characterized in that: the condensed water for cooling is discharged from the multi-stage cooler (1) and then recycled.
5. The novel steam cooling energy-saving device as claimed in claim 4, characterized in that: the condensed water for cooling is discharged from the multi-stage cooler (1) and then recycled to the multi-stage heat exchange equipment (5).
6. A novel steam temperature-reducing and energy-saving device as claimed in any one of claims 1 to 3, characterized in that: the multistage cooler (1) adopts an adjustable multistage cooling mode and can be switched among one-stage cooling, two-stage cooling, three-stage cooling and even more stages of cooling.
7. The novel steam cooling energy-saving device as claimed in claim 6, characterized in that: the multistage cooler (1) adopts a pipe-in-pipe mode, a thick pipe is sleeved outside a thin pipe, superheated steam passes through the thin pipe, and condensed water is removed between the inner pipe and the outer pipe.
Technical Field
The invention relates to the cooling of superheated steam, the efficiency improvement of steam-using equipment and the heat energy recycling of condensed water, and belongs to novel steam cooling energy-saving equipment.
Background
Among steam users in various industries, superheated steam is increasingly becoming the primary source of steam. Because superheated steam heat transfer coefficient is low, lead to heat transfer equipment production efficiency to reduce, in addition, when using superheated steam, equipment life shortens, maintenance rate improves and the working costs increases, consequently need become saturated steam after with superheated steam cooling and just can supply heat transfer equipment. The existing temperature reduction equipment in the market has the advantages of complex structure, large occupied space, large installation work amount, large investment, high failure rate and unobvious energy-saving effect. Therefore, the problem caused by using the superheated steam exists for a long time due to the fact that most enterprises directly use the superheated steam without reducing the temperature of the superheated steam. And although some enterprises are provided with the temperature reduction systems, the steam consumption is not obviously reduced, and many enterprises cannot normally operate due to failure, so that investment and energy are wasted, and the consequences caused by superheated steam are borne.
The novel steam cooling energy-saving equipment provided by the invention has the advantages of simple structure, no abrasion part, easiness in installation and low investment cost, can solve the problems caused by using superheated steam, can recycle the heat energy in condensed water, and can effectively, economically and reliably realize the purposes of saving energy, increasing efficiency and prolonging the service life of the equipment for steam users.
Disclosure of Invention
The invention aims to reduce the temperature of superheated steam so as to improve the efficiency of steam equipment, prolong the service life of the steam equipment and reduce the steam consumption of the steam equipment. Its aim at provides a novel steam cooling economizer.
The invention is realized by the following technical scheme: a novel steam cooling energy-saving device comprises: the device comprises a multi-stage cooler 1, a stage change adjusting unit 2, an induction and control unit 3, a low-temperature bypass unit 4 and a multi-stage heat exchange device 5. The multistage cooler 1 is arranged on a steam pipeline, the steam inlet side of the multistage cooler is connected with a steam source, and the steam outlet side of the multistage cooler is communicated with the multistage heat exchange equipment 5. The lower end of the multi-stage cooler 1 is connected with the grading adjusting unit 2, and the upper end of the multi-stage cooler is connected to a condensate water recycling pipeline and then enters a preheating unit of the multi-stage heat exchange equipment 5; the inlet of the grading adjusting unit 2 is connected with the outlet of the steam heating section of the multi-section heat exchange equipment 5, the outlet of the grading adjusting unit 2 is connected with the multi-stage cooler 1, meanwhile, the grading adjusting unit 2 is also connected with the low-temperature bypass unit 4, and the action process of the grading adjusting unit 2 is controlled by the induction and control unit 3; the induction and control unit 3 induces the outlet temperature of the multi-stage cooler 1 and controls the grading adjustment unit 2 and the low-temperature bypass unit 4; the inlet of the low-temperature bypass unit 4 is connected with the step change adjusting unit 2, the outlet of the low-temperature bypass unit 4 is communicated with the outlet at the upper end of the multi-stage cooler 1, and the low-temperature bypass unit 4 is controlled by the induction and control unit 3.
The multistage cooler 1 is of a pipe-in-pipe structure, namely a large-caliber pipe is sleeved outside a small-caliber pipe, the two pipes are coaxially arranged, and the space between the inner pipe and the outer pipe is divided into three different areas, namely three independent cooling cavities.
The step-variable adjusting unit 2 has an inlet and four outlets, and one inlet and four outlets respectively form a control channel, and the total number of the control channels is four. The inlet of the grading adjusting unit 2 is connected with the outlet of the steam heating section of the multi-section heat exchange device 5, three outlets of the grading adjusting unit 2 are respectively connected with the inlets of three cooling cavities of the multi-stage cooler 1, and the fourth outlet is connected with the low-temperature bypass unit 4.
The induction and control unit 3 comprises a temperature sensor and a controller, the temperature sensor is arranged at the outlet of the multi-stage cooler 1, and the controller controls the level change adjusting unit 2 and the low-temperature bypass unit 4.
As an improvement of the present invention, a plurality of inner tubes are provided inside the outer tube of the multistage cooler 1.
As an improvement of the invention, the multi-stage cooler 1 adopts more than three stages of cooling modes, namely more than three cooling cavities are arranged, and the step change adjusting unit 2 can correspondingly increase a control channel.
As a further improvement of the invention, a pressure reduction device is additionally arranged on the inlet pipeline of the multi-stage cooler 1.
As a modification of the present invention, the multistage desuperheater 1 employs a shell-and-tube heat exchanger, and the step-change adjusting unit 2 employs an automatic adjusting valve to control the steam outlet temperature of the multistage desuperheater 1.
As another variation of the invention, a single-stage steam-consuming device, i.e. a device with only one steam inlet and one condensed water outlet, is used to replace the multi-stage heat exchange device 5, and the condensed water outlet at the upper end of the multi-stage cooler 1 is connected with other devices utilizing the heat energy of the condensed water.
The invention has the advantages that: 1. the efficiency of the steam equipment is improved, and the service life of the steam equipment is prolonged; 2. the heat energy of the condensed water is recycled, so that the energy is saved and the consumption is reduced; 3. the occupied space is small, and the installation is easy; 4. no water pump is needed, the investment and operation cost is low, and the failure rate is low.
Drawings
FIG. 1 is a schematic view of a novel steam cooling energy-saving device
FIG. 2 is a schematic structural view of the multi-stage desuperheater 1 of FIG. 1
In the figure: the device comprises a 1-multi-stage cooler, a 2-stage variable adjusting unit, a 3-induction and control unit, a 4-low-temperature bypass unit, a 5-multi-stage heat exchange device, a 6-multi-stage cooler outer pipe, a 7-multi-stage cooler inner pipe, an 8-interstage division plate and a 9-interstage division plate.
Detailed description of the preferred embodiments
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1, the novel steam cooling energy-saving device of the present invention comprises: the device comprises a multi-stage cooler 1, a stage change adjusting unit 2, an induction and control unit 3, a low-temperature bypass unit 4 and a multi-stage heat exchange device 5. The multistage cooler 1 is arranged on a steam pipeline, a steam inlet of the multistage cooler is connected with a superheated steam pipeline, and a steam outlet of the multistage cooler is communicated with a steam heating section of the multistage heat exchange equipment 5. Three inlets at the lower end of the multi-stage cooler 1 are respectively connected with three outlets of the grading adjusting unit 2, and an outlet at the upper end of the multi-stage cooler 1 is connected to a preheating unit of the multi-stage heat exchange equipment 5 through a condensate water recycling pipeline; the inlet of the grade change adjusting unit 2 is connected with a condensate pipe of the outlet of the steam heating section of the multi-section heat exchange equipment 5, the three outlets of the grade change adjusting unit are respectively connected with the three inlets at the lower end of the multi-stage cooler 1, and the fourth outlet of the grade change adjusting unit 2 is connected with the inlet of the low-temperature bypass unit 4. The level change adjusting unit 2 is controlled by the sensing and controlling unit 3; the induction and control unit 3 comprises a temperature sensor and a controller, the temperature sensor is arranged at the outlet of the multistage cooler 1 and used for testing the steam temperature, and the controller receives signals of the temperature sensor and outputs signals to the step change adjusting unit 2 and the low-temperature bypass unit 4; the inlet of the low-temperature bypass unit 4 is connected with the level-change adjusting unit 2, the outlet of the low-temperature bypass unit 4 is connected with the outlet at the upper end of the multi-level cooler 1, and the low-temperature bypass unit 4 is controlled by the induction and control unit 3.
As shown in fig. 2, the multistage desuperheater 1 includes: the device comprises an outer
Four control channels are arranged in the step change adjusting unit 2, inlets of the four control channels are connected with an inlet of the step change adjusting unit 2, three outlets of the four control channels are connected with the multi-stage cooler 1, and each channel comprises an automatic switch valve, a pipeline and matched accessories. Under the control of the induction and control unit 3, three sets of automatic switch valves have four states: one set is opened, two sets are opened, three sets are opened, and three sets are closed. The fourth channel is simply a conduit, the outlet of which is connected to the inlet of the low temperature bypass unit 4.
The low-temperature bypass unit 4 comprises an automatic control valve, a pipeline and accessories, an inlet of the low-temperature bypass unit is connected with a fourth outlet of the step-change adjusting unit 2, an outlet of the low-temperature bypass unit is connected with an outlet at the upper end of the multi-stage cooler 1, and the low-temperature bypass unit 4 is controlled by the induction and control unit 3.
The working principle of the embodiment is as follows: superheated steam enters the inner pipe from a steam inlet of the multistage cooler 1, when the induction and control unit 3 induces that the temperature of the steam at the outlet of the multistage cooler 1 reaches or exceeds a set value H, a signal is output to the step change adjusting unit 2, three sets of automatic switching valves of the step change adjusting unit are all opened, namely three channels are all opened, and condensed water enters three temperature reduction cavities of the multistage cooler 1 through three passages to carry out three-stage temperature reduction on the superheated steam; when the sensing and control unit 3 senses that the temperature of the steam at the outlet of the multi-stage cooler 1 is reduced to a set value L1, a signal is output to the step change regulating unit 2, and a set of automatic switch valves are closed; when the sensing and control unit 3 senses that the temperature of the steam at the outlet of the multi-stage cooler 1 is reduced to a set value L2, a signal is output to the level change regulating unit 2, and the other set of automatic switch valve is closed; when the induction and control unit 3 induces that the temperature of the steam at the outlet of the multistage cooler 1 is lower than a set value T, a signal is output to the low-temperature bypass unit 4, an automatic control valve of the low-temperature bypass unit starts to act and automatically adjusts the opening degree, and the temperature of the steam at the outlet of the multistage cooler 1 is ensured to be about T; if the sensing and control unit 3 senses that the temperature of the steam at the outlet of the multi-stage desuperheater 1 is lower than the set value L3, the sensing and control unit 3 sends a signal to close all three sets of automatic switch valves of the step-change adjusting unit 2, and simultaneously, all the automatic control valves of the low-temperature bypass unit 4 are opened.
As a modified embodiment of the present invention, in the case where the degree of superheat of steam is large, a plurality of inner tubes are provided inside the outer tube of the multistage desuperheater 1, and appropriate and uniform gaps are maintained between the inner tubes.
As an improved embodiment of the invention, according to actual cooling requirements, the multistage cooler 1 adopts a cooling mode with more than three stages, namely, the number of cooling cavities is increased by increasing interstage isolation plates, and the step change adjusting unit 2 also correspondingly increases a control channel.
As an improved embodiment of the invention, if the steam pressure fluctuation of the superheated steam is large, an automatic pressure control valve is additionally arranged on an inlet pipeline of the multi-stage cooler 1, and a pressure sensor of the control valve is arranged on an outlet steam pipeline of the multi-stage cooler 1.
As a variant embodiment of the present invention, the multistage desuperheater 1 employs a shell-and-tube heat exchanger, superheated steam enters a tube side, and condensed water enters a shell side. Meanwhile, the level change adjusting unit 2 adopts a set of automatic temperature adjusting valve to control the outlet temperature of the multi-level cooler 1 in cooperation with the low-temperature bypass unit 4. In this case, the automatic temperature regulating valve of the step-change regulating unit 2 and the automatic control valve of the low temperature bypass unit 4 may be implemented by a set of automatic three-way valves.
As another variant of the present invention, a single-stage steam-consuming device such as a plate heat exchanger is used instead of the multi-stage heat exchanger 5, and the condensed water discharged from the upper end of the multi-stage cooler 1 can be used in other places such as heating or other places where a low-temperature heat source is required.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. All such modifications, equivalents and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
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