CN210993054U - Steam recycling device for urea production - Google Patents

Abstract

The utility model discloses a steam recovery utilizes device for urea production, including the flash tank, two outlet ducts and pressure control device are installed to the upper end of flash tank, pressure control device is located one side of two outlet ducts, the upper end of flash tank runs through and is equipped with the inlet pipe, the inlet pipe is located between two outlet ducts, be connected with feed arrangement on the inlet pipe. The utility model discloses conveniently concentrate the recovery with high-quality steam condensate, send into purification shop soft water heater and oxygen-eliminating device through the flash distillation in, can improve and get into boiler temperature, can guarantee under the various pressure levels that the condensate can both get into the flash tank, stable system normal operating, and can rely on the water head to return the steam condensate in the flash tank to steam condensate groove moisturizing, guaranteed the water level in the condensate tank, make things convenient for automatically regulated.

Description

Steam recycling device for urea production

Technical Field

The utility model relates to a urea production technical field especially relates to a steam recovery utilizes device for urea production.

Background

Urea, also known as carbamide, is an organic compound consisting of carbon, nitrogen, oxygen, and hydrogen, which is a white crystal. One of the simplest organic compounds is the major nitrogen-containing end product of the metabolic breakdown of proteins in mammals and certain fish. The urea is also the nitrogen fertilizer with the highest nitrogen content at present, and is used as a neutral fertilizer, and the urea is suitable for various soils and plants. It is easy to preserve, convenient to use, and has little destructive effect on soil, and is a chemical nitrogen fertilizer with larger use amount at present. The industrial synthesis of urea by ammonia gas and carbon dioxide under certain conditions has been pressing to meet the demands of continuous expansion of the capacity of the urea industry, the saturation degree of the market and the environmental protection situation pressure, the cost is continuously rising, higher requirements are put on various consumption indexes, the process operation is optimized, and the cost consumption is saved. How to fully utilize the heat energy of the steam and reduce the steam consumption is imperative.

The steam condensate generated in the technological process of the urea main device is completely collected to prepare a steam condensate tank, the number of steam traps is large, the operation period is long, part of the steam traps are out of service for a long time, the workload of the inspection is large, part of steam can return to a liquid level tank through the steam condensate cooler through the steam traps, and the liquid level tank generates emptying steam in a normal pressure state, so that energy waste is caused, the load of circulating water is increased, and the energy conservation and consumption reduction are not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a steam recycling device for urea production.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a steam recycle device for urea production, includes the flash tank, two outlet ducts and pressure control device are installed to the upper end of flash tank, pressure control device is located one side of two outlet ducts, the upper end of flash tank is run through and is equipped with the inlet pipe, the inlet pipe is located between two outlet ducts, be connected with feed arrangement on the inlet pipe, be fixed with first distributor and second distributor on the relative lateral wall in the flash tank jointly, and first distributor is located the upper end of second distributor, the drain pipe is installed to the lower extreme of flash tank, the one end of drain pipe is connected with middle dashpot, the lower extreme of middle dashpot is connected with the fourth connecting pipe, the one end of fourth connecting pipe is connected with the steam condensate groove, be equipped with controlling means on the steam condensate groove.

Preferably, controlling means is including fixing the second level gauge in the steam condensate cistern, one side in steam condensate cistern is fixed with the wireless transmission device of second, install control valve and self-modulation valve on the fourth connecting pipe, be fixed with first level gauge on the one end lateral wall in the middle dashpot, one side in middle dashpot is fixed with the wireless transmission device of first.

Preferably, feed arrangement is including fixing the third connecting pipe of connecting in the inlet pipe upper end, the one end of third connecting pipe is connected with the connection box, the equidistant a plurality of second connecting pipes that are connected with in upper end of connection box.

Preferably, the upper ends of the two air outlet pipes are connected with first connecting pipes, one end of one of the first connecting pipes is connected with a soft water heater, and one end of the other first connecting pipe is connected with a deaerator.

Preferably, the both sides of inlet pipe all are fixed with the dead lever, and the one end of two dead levers is fixed respectively on the one end lateral wall in the flash tank.

Preferably, one end of the feeding pipe is arranged in a flaring mode.

Compared with the prior art, the beneficial effects of the utility model are that:

1. through the cooperation between controlling means, drain pipe and the steam condensate groove, rely on the water head to return the steam condensate in the flash tank to steam condensate groove moisturizing, guaranteed the water level in the condensate tank, make things convenient for automatically regulated.

2. The high-quality steam condensate is conveniently and intensively recovered through the matching among the feeding device, the flash tank and the first connecting pipe, and is sent into a soft water heater and a deaerator of a purification workshop through flash evaporation, so that the temperature of the steam condensate entering a boiler can be increased;

to sum up, this device is convenient to concentrate high-quality steam condensate and retrieves, sends into between purification shop soft water heater and the oxygen-eliminating device through the flash distillation, can improve and get into boiler temperature, can guarantee under the various pressure levels that the condensate can both get into the flash tank, and stable system normal operating, and can rely on the water head to return the steam condensate in the flash tank to steam condensate groove moisturizing, has guaranteed the water level in the condensate tank, convenient automatically regulated.

Drawings

FIG. 1 is a schematic view of the external structure of a flash tank of a vapor recycling device for urea production according to the present invention;

FIG. 2 is a schematic view of the internal structure of a flash tank of the vapor recycling device for urea production according to the present invention;

FIG. 3 is a schematic structural view of a vapor recycling device for urea production according to the present invention;

fig. 4 is the utility model provides a steam recycle device's for urea production internal structure schematic diagram.

In the figure: 1 inlet pipe, 2 outlet pipes, 3 flash tanks, 4 drain pipes, 5 pressure control devices, 6 fixed rods, 7 first distributors, 8 second distributors, 9 first wireless transmission devices, 10 first liquid level meters, 11 first connecting pipes, 12 soft water heaters, 13 second connecting pipes, 14 connecting boxes, 15 third connecting pipes, 16 deaerators, 17 fourth connecting pipes, 18 control valves, 19 self-regulating valves, 20 second wireless transmission devices, 21 steam condensate tanks, 22 second liquid level meters and 23 intermediate buffer tanks.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-4, a steam recycling device for urea production, comprising a flash tank 3, two outlet pipes 2 and a pressure control device 5 are installed at the upper end of the flash tank 3, the pressure control device 5 is located at one side of the two outlet pipes 2, the upper ends of the two outlet pipes 2 are connected with first connecting pipes 11, one end of one of the first connecting pipes 11 is connected with a soft water heater 12, one end of the other first connecting pipe 11 is connected with a deaerator 16, a feed pipe 1 is arranged at the upper end of the flash tank 3 in a penetrating manner, the feed pipe 1 is located between the two outlet pipes 2, fixing rods 6 are fixed at both sides of the feed pipe 1, one ends of the two fixing rods 6 are respectively fixed on the side wall at one end in the flash tank 3, so as to be convenient and stable to fix, one end of the feed pipe 1 is flared and convenient to use, the feed pipe 1 is connected with a feeding, and first distributor 7 is located the upper end of second distributor 8, and the condensate passes through inlet pipe 1 and gets into in the flash tank 3, through the cooperation between first distributor 7 and the second distributor 8, can be with condensate vapor-liquid separation, and the steam after the separation gets into soft water heater 12 and the oxygen-eliminating device 16 in the workshop through outlet duct 2 and first connecting pipe 11 respectively, improves and gets into boiler temperature.

The utility model discloses in, install drain pipe 4 through the lower extreme of flash tank 3, the one end of drain pipe 4 is connected with middle dashpot 23, the lower extreme of middle dashpot 23 is connected with fourth connecting pipe 17, the one end of fourth connecting pipe 17 is connected with steam condensate tank 21, be equipped with controlling means on the steam condensate tank 21, liquid passes through drain pipe 4 and fourth connecting pipe 17 and gets into steam condensate tank 21, conveniently controls the moisturizing of steam condensate tank 21 through controlling means.

The utility model discloses in, controlling means is including fixing the second level gauge 22 in steam condensate tank 21, one side of steam condensate tank 21 is fixed with second wireless transmission device 20, install control valve 18 and self-modulation valve 19 on the fourth connecting pipe 17, be fixed with first level gauge 10 on the one end lateral wall in middle buffer tank 23, one side of middle buffer tank 23 is fixed with first wireless transmission device 9, the liquid level at both ends is conveniently measured through first level gauge 10 and second level gauge 22, can send liquid level data to in the total control device through first wireless transmission device 9 and second wireless transmission device 20, then intake through self-modulation valve 19 and control valve 18 control, can be through the liquid level difference to the moisturizing of steam condensate tank 21.

The utility model discloses in, feed arrangement is including fixing third connecting pipe 15 in the 1 upper end of inlet pipe, the one end of third connecting pipe 15 is connected with connecting box 14, equidistant a plurality of second connecting pipes 13 of upper end of connecting box 14 are connected with, be connected to middling pressure heat preservation steam line respectively and low pressure heat preservation steam line with the one end of a plurality of second connecting pipes 13 in, can be with 8 kilograms of heat preservation steam condensate of high-pressure ring, rectifying column heating steam condensate, one section condensate of evaporation is sent to flash tank 3 respectively in, the condensate can both get into flash tank 3 under guaranteeing various pressure levels, stable system normal operating, the convenience is concentrated the recovery with high-quality steam condensate.

In the utility model, when in use, one end of a plurality of second connecting pipes 13 is respectively connected to the medium-pressure heat-preservation steam pipeline and the low-pressure heat-preservation steam pipeline, 8 kilograms of heat-preservation steam condensate of a high-pressure ring, the steam condensate heated by the rectifying tower and the condensate evaporated to the flash tank 3 respectively, the condensate can be ensured to enter the flash tank 3 under various pressure levels, the stable system can normally run, the high-quality steam condensate can be conveniently and intensively recycled, the condensate enters the flash tank 3 through the inlet pipe 1, the condensate can be separated from the steam and the liquid through the matching between the first distributor 7 and the second distributor 8, the separated steam respectively enters the soft water heater 12 and the deaerator 16 of the purification workshop through the outlet pipe 2 and the first connecting pipe 11, the temperature of entering the boiler is improved, the liquid enters the steam condensate tank 21 through the outlet pipe 4 and the fourth connecting pipe 17, the liquid levels at the two ends are conveniently measured through the first liquid level meter 10 and the second liquid level meter 22, liquid level data can be sent into the master control device through the first wireless transmission device 9 and the second wireless transmission device 20, then water is controlled to enter through the self-regulating valve 19 and the control valve 18, and water can be supplemented to the steam condensate tank 21 through liquid level difference.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (6)

1. The utility model provides a steam recycle device for urea production, includes flash tank (3), its characterized in that: two outlet pipes (2) and a pressure control device (5) are installed to the upper end of flash tank (3), pressure control device (5) are located one side of two outlet pipes (2), the upper end of flash tank (3) runs through and is equipped with inlet pipe (1), inlet pipe (1) are located between two outlet pipes (2), be connected with feed arrangement on inlet pipe (1), be fixed with first distributor (7) and second distributor (8) on the relative lateral wall in flash tank (3) jointly, and first distributor (7) are located the upper end of second distributor (8), drain pipe (4) are installed to the lower extreme of flash tank (3), the one end of drain pipe (4) is connected with middle buffer tank (23), the lower extreme of middle tank (23) is connected with fourth connecting pipe (17), the one end of fourth connecting pipe (17) is connected with steam condensate buffer tank (21), and a control device is arranged on the steam condensate tank (21).

2. The steam recycling device for urea production as claimed in claim 1, wherein the control device comprises a second liquid level meter (22) fixed in a steam condensate tank (21), a second wireless transmission device (20) is fixed on one side of the steam condensate tank (21), a control valve (18) and a self-regulating valve (19) are installed on the fourth connecting pipe (17), a first liquid level meter (10) is fixed on a side wall of one end in the intermediate buffer tank (23), and a first wireless transmission device (9) is fixed on one side of the intermediate buffer tank (23).

3. The steam recycling device for urea production as recited in claim 1, wherein the feeding device comprises a third connecting pipe (15) fixed on the upper end of the feeding pipe (1), one end of the third connecting pipe (15) is connected with a connecting box (14), and the upper end of the connecting box (14) is connected with a plurality of second connecting pipes (13) at equal intervals.

4. A steam recycling device for urea production according to claim 1, characterized in that the upper ends of the two outlet pipes (2) are connected with first connecting pipes (11), one end of one of the first connecting pipes (11) is connected with a soft water heater (12), and one end of the other first connecting pipe (11) is connected with a deaerator (16).

5. The steam recycling device for urea production as recited in claim 1, wherein the feed pipe (1) is fixed with fixing rods (6) at both sides, and one end of each of the two fixing rods (6) is fixed on the side wall of one end inside the flash tank (3).

6. A urea production steam recycling device according to claim 1, characterized in that one end of the feeding pipe (1) is flared.

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