CN208124952U - For the waste-heat recovery device in production of caustic soda - Google Patents

Abstract

The utility model proposes a kind of waste-heat recovery devices in production of caustic soda, including cold water storage cistern, boiler, water-supply-pipe, frequency conversion fan and for connecting the escape pipe of caustic soda reactor and water-supply-pipe and muffler, Heat exchange jacekt is additionally provided on the water-supply-pipe, the junction of escape pipe and caustic soda reactor is provided with spring extension tube, it is provided with electric control valve on the delivery line connecting with escape pipe, on the muffler and tail portion of water-supply-pipe is respectively arranged with a temperature sensor.By flowing the gas of reaction in the heat exchanger channels wound side by side inside Heat exchange jacekt, heat is exchanged with cold Jie, and whether two temperature sensor monitoring gases and cold Jie fulfil heat exchange ahead of schedule, and then appropriate adjustment electric control valve and gas circulation rate is changed by frequency conversion fan, promote gas to flow using spring extension tube simultaneously, greatly improves heat exchange efficiency.The utility model is designed reasonably, structure are simple, are suitble to large-scale promotion.

Description

For the waste-heat recovery device in production of caustic soda

Technical field

The utility model belongs to caustic soda equipment technical field more particularly to a kind of waste heat in production of caustic soda returns Receiving apparatus.

Background technique

Sodium hydroxide is commonly called as caustic soda, caustic soda, caustic soda, be a kind of highly basic with very strong corrosive, generally sheet or Particle shape, it is soluble easily in water and form alkaline solution, separately there is hygroscopy, vapor (deliquescence) and titanium dioxide in easy draw air Carbon (rotten).There are two types of main production methods, including causticizing process and electrolysis method for caustic soda.Causticizing process is with soda ash aqueous solution and stone Grey cream generates caustic soda by causticizing reaction；Electrolysis method be using electrolysis saturated common salt aqueous solution generate caustic soda, and by-product chlorine and Hydrogen, electrolysis method production caustic soda are also known as chlorine industry.Whether causticizing process or electrolysis method can produce during producing caustic soda Raw a large amount of heat and gas, these heats generally can all be neutralized by cooling device, very be wasted, and in the daily life of enterprise Work also needs separately heat supply.

Currently, manufacturing enterprise is to adapt to energy-saving trend, returned for the heat that production of caustic soda generates provided with heat Receiving apparatus uses for daily life water or heat supply.Existing heat reclaim unit it is relatively common be used in caustic soda reactor Heat exchanger is provided with outside to transfer heat to cold medium, but caustic soda reacts making for the heat exchangings devices such as the chlorine generated and hydrogen There is large effect with the service life；For some heat reclaim units using the mode of circulating heat conduction, principle is exactly that caustic soda is utilized to produce The gas of raw carrying heat transfers heat to cold medium during circulation, but this method there are the problem of just It is that longer in contact route of the cold Jie's pipeline with gas passage, the cold joint pipeline that cold medium finally enters boiler is substantially all There is gas to pass through, in this case, the effect finally reached that exchanges heat is the mean temperature or hot water that gas and cold Jie reach the two Temperature in case does not increase always or is exactly especially to grow heating time, and optimal effect should be, caustic soda reactor The temperature difference of gas outlet and air inlet is maximum, that is to say, that substantially that heat is big big absolutely when gas returns in caustic soda reactor Partial contribution has given cold medium, this just needs to carry out recycle circuit certain optimization and improves to relevant device.

Utility model content

Technical problem present in recyclable device of the utility model for above-mentioned production of caustic soda waste heat, proposes a kind of design Rationally, structure is simple, recovering effect is good and the waste-heat recovery device of high degree of automation being used in production of caustic soda.

In order to achieve the above object, the technical solution adopted in the utility model is, provided by the utility model to be used for caustic soda Waste-heat recovery device in production, cold water storage cistern and boiler including being located at caustic soda reactor two sides, the cold water storage cistern are connected with Water pump is provided with water-supply-pipe between the water pump and boiler, including the escape pipe and muffler for connecting caustic soda reactor, The junction of the escape pipe and caustic soda reactor is provided with spring extension tube, and there are two export for the outlet setting of the escape pipe It manages, is provided with Heat exchange jacekt on the water-supply-pipe, the Heat exchange jacekt includes two heat exchanger channels connecting with delivery line, the heat exchange Channel is connected to by leading back to pipe with muffler, and described lead back to is connected with blower between pipe and muffler.

Preferably, one in described two delivery lines is provided with electric control valve, first is provided on the muffler Temperature sensor, the tail portion of the water-supply-pipe are provided with second temperature sensor, be provided on the muffler with electric control valve, The control box that first temperature sensor and second temperature sensor are electrically connected.

Preferably, the blower is frequency conversion fan.

Preferably, described two heat exchanger channels are wrapped on water-supply-pipe side by side.

Preferably, the spring extension tube includes spring and pipe sleeve.

Compared with prior art, it is the advantages of the utility model with good effect,

1, the waste-heat recovery device provided by the utility model in production of caustic soda, the heat exchange wound side by side using two Channel come for it is cold Jie heat is provided, meanwhile, pipe is led back to by the first temperature sensor and second temperature sensor real-time monitoring Reflux temperature and water-supply-pipe output temperature, explanation cold Jie and hot gas in heat exchanger channels are fulfiled ahead of schedule if two temperature difference are smaller Temperature neutralizes in other words for heat exchange, changes gas circulation rate by frequency conversion fan, so that gas after cooling be promoted to enter So that the gas newly reacted and cold Jie is continued that heat exchange occurs in caustic soda reactor, improves heat exchange efficiency；Utilize spring extension tube The interaction that can use spring and gas momentum promotes gas flowing, improves heat exchange efficiency.The utility model is designed reasonably, Structure is simple, is suitble to large-scale promotion.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical solution of the utility model embodiment The attached drawing used is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the utility model, For those of ordinary skill in the art, without any creative labor, it can also obtain according to these attached drawings Obtain other attached drawings.

Fig. 1 is the overall structure diagram for the waste-heat recovery device in production of caustic soda that embodiment provides；

Fig. 2 is the structural schematic diagram of the embodiment water-supply-pipe provided and Heat exchange jacekt；

In above each figure, 1, caustic soda reactor；2, cold water storage cistern；3, boiler；4, water pump；5, water-supply-pipe；6, escape pipe；7, Muffler；8, spring extension tube；9, delivery line；10, pipe is led back to；11, Heat exchange jacekt；111, heat exchanger channels；12, blower；13, automatically controlled Valve；14, the first temperature sensor；15, second temperature sensor；16, box is controlled.

Specific embodiment

It is with reference to the accompanying drawing and real in order to be more clearly understood that the above objects, features, and advantages of the utility model Example is applied to be described further the utility model.It should be noted that in the absence of conflict, embodiments herein and reality The feature applied in example can be combined with each other.

Many details are explained in the following description in order to fully understand the utility model, still, this is practical Novel to be implemented using other modes described herein are different from, therefore, the utility model is not limited to be described below The limitation of the specific embodiment of specification.

Embodiment, as shown in Figure 1 and Figure 2, the waste-heat recovery device provided by the utility model in production of caustic soda, packet The cold water storage cistern 2 and boiler 3 positioned at 1 two sides of caustic soda reactor are included, the cold water storage cistern 2 is connected with water pump 4, the water pump 4 and heat Water-supply-pipe 5 is provided between water tank 3.Wherein, cold water storage cistern 2, boiler 3 and water pump 4 are mature component in the prior art, As for its specific structure and function the present embodiment, details are not described herein.The emphasis of the utility model is to react caustic soda to generate The improvement that the pipeline and control structure that gas is related to during circulating are made, passes through the circulation of adjust automatically gas Rate improves heat transfer effect.

Specifically, the utility model further includes the escape pipe 6 and muffler 7 for connecting caustic soda reactor, the outlet The junction of pipe 6 and caustic soda reactor 1 is provided with spring extension tube 8, and the outlet of the escape pipe 6 is arranged there are two delivery line 9, Heat exchange jacekt 11 is provided on the water-supply-pipe 5, the Heat exchange jacekt 11 includes two heat exchanger channels 111 connecting with delivery line 9, institute It states heat exchanger channels 111 to be connected to by leading back to pipe 10 with muffler 7, described lead back between pipe 10 and muffler 7 is connected with blower.This If sample is arranged, the path of gas circulation just becomes, and is flowed out by caustic soda reactor, successively passes through spring extension tube, escape pipe, leads Outlet pipe, heat exchanger channels lead back to pipe and muffler, are finally returning to caustic soda reactor.

For the heat of abundant exchanging gas and cold Jie, described two heat exchanger channels 111 provided by the utility model are side by side It is wrapped on water-supply-pipe 5, in other words, two heat exchanger channels 111 are tightly attached to the surface of water-supply-pipe in a spiral form, need to illustrate , the part of heat exchanger channels winding is primarily referred to as the horizontal component of water-supply-pipe in Fig. 1, in this case increase gas with it is cold The contact area of Jie.Meanwhile delivery line 9 is that two of escape pipe 6 are in charge of, and leads back to two that pipe 10 is muffler 7 and is in charge of, a side Face is to connect heat exchanger channels 111 reasonably with escape pipe 6 and muffler 7, is on the other hand to guarantee that gas follows Certain access is centainly controlled under the premise of circulation is dynamic, more efficiently adjusts the mobility program of gas.

In order to improve the efficiency of the cold heating that is situated between, the utility model provides temperature difference detection, mainly real-time monitoring And compare 5 output temperature of the reflux temperature for leading back to pipe 10 and water-supply-pipe.Specifically, the utility model has and is arranged on a delivery line There is electric control valve 13, the first temperature sensor 14 is provided on the muffler 7, the tail portion of the water-supply-pipe 5 is provided with second Temperature sensor 15 is provided with and electric control valve 13, the first temperature sensor 14 and second temperature sensor on the muffler 7 The 15 control boxes 16 being electrically connected.In this case, comparable out according to the first temperature sensor 14 and second temperature sensor 15 It leads back to pipe 7 and water-supply-pipe 5 exports the temperature difference.If the temperature difference is larger, illustrate that heat exchange is compared thoroughly；If the temperature difference is smaller, It can be concluded that cold Jie and hot gas fulfiled ahead of schedule in Heat exchange jacekt region heat exchange in other words in temperature and, heat exchange Not fully, then control box can control electric control valve 13 and close a delivery line, concentrate on heat in another delivery line, Cold Jie in water-supply-pipe 5 is further heated, more sufficiently, effectively utilizes resource.

Further, the blower 12 provided by the utility model is frequency conversion fan, and spring extension tube 8 includes spring And pipe sleeve.In this case, gas circulation rate is reasonably adjusted by frequency conversion fan, so that gas after cooling be promoted to enter burning So that the gas newly reacted and cold Jie is continued that heat exchange occurs in alkali reactor, substantially increases heat exchange efficiency.It furthermore is exactly bullet Spring in spring telescoping tube 8 interacts with the gas momentum generated is reacted, and promotes gas flowing, further increases heat exchange effect Rate.It should be noted that controller model MLX90363LDC- used in the control box 16 provided in the utility model ABB can effectively control two temperature sensors and electric control valve 13.The utility model is designed reasonably, structure are simple, automate Degree is high, is suitble to large-scale promotion.

The above descriptions are merely preferred embodiments of the present invention, is not to make other forms to the utility model Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent The equivalent embodiment of variation is applied to other fields, but all without departing from the content of the technical scheme of the utility model, according to this reality With novel technical spirit any simple modification, equivalent variations and remodeling to the above embodiments, it is practical new to still fall within this The protection scope of type technical solution.

Claims (5)

1. a kind of waste-heat recovery device in production of caustic soda, cold water storage cistern and hot water including being located at caustic soda reactor two sides Case, the cold water storage cistern are connected with water pump, are provided with water-supply-pipe between the water pump and boiler, which is characterized in that including being used for The junction of the escape pipe and muffler of connection caustic soda reactor, the escape pipe and caustic soda reactor is provided with telescopic spring Pipe, the outlet setting of the escape pipe are provided with Heat exchange jacekt there are two delivery line on the water-supply-pipe, the Heat exchange jacekt includes two A heat exchanger channels connecting with delivery line, the heat exchanger channels are connected to by leading back to pipe with muffler, described to lead back to pipe and return-air Blower is connected between pipe.

2. the waste-heat recovery device according to claim 1 in production of caustic soda, which is characterized in that described two export One in pipe is provided with electric control valve, and the first temperature sensor is provided on the muffler, and the tail portion of the water-supply-pipe is set It is equipped with second temperature sensor, is provided on the muffler and is sensed with electric control valve, the first temperature sensor and second temperature The control box that device is electrically connected.

3. the waste-heat recovery device according to claim 2 in production of caustic soda, which is characterized in that the blower is to become Frequency blower.

4. the waste-heat recovery device according to claim 3 in production of caustic soda, which is characterized in that two heat exchange Channel is wrapped on water-supply-pipe side by side.

5. the waste-heat recovery device according to claim 4 in production of caustic soda, which is characterized in that the telescopic spring Pipe includes spring and pipe sleeve.