CN215962686U - Urea hydrolysis reactor export filter equipment - Google Patents

Abstract

The utility model provides a filtering device for an outlet of a urea hydrolysis reactor, which can realize online replacement or flushing, maintain the stability of a filter, improve the filtering effect, prevent the blockage of a valve and a pipeline and ensure the safety and continuous and stable operation of the urea hydrolysis reactor. The utility model provides a urea hydrolysis reactor export filter equipment, includes the parallelly connected filter tube who sets up of two tunnel, and the inlet end of two tunnel filter tubes is connected with urea hydrolysis reactor's exit end, sets gradually first valve, filter, second valve and adjusting device on every filter tube, and filter detachable connects on filter tube.

Description

Urea hydrolysis reactor export filter equipment

Technical Field

The utility model belongs to the technical field of flue gas denitration treatment, and particularly relates to a filtering device for an outlet of a urea hydrolysis reactor.

Background

Due to the characteristics of liquid ammonia, the liquid ammonia is easy to gasify and diffuse and toxic, when leakage occurs, the liquid ammonia is changed from liquid state to gas state, the liquid ammonia can be gasified rapidly, the volume is enlarged rapidly, and the liquid ammonia which is not gasified in time is atomized in steam in the form of liquid drops; in the initial stage of leakage, the density of the cloud cluster of ammonia vapor is higher than that of air due to partial evaporation of liquid ammonia, ammonia drifts with wind, a large-area contamination area and a combustion explosion area are easy to form, people in a hazard range need to be evacuated in time, and measures for prohibiting fire sources are taken. The process for preparing the denitration reducing agent by using the liquid ammonia is gradually replaced by the urea hydrolysis preparation process as the preparation process for preparing the ammonia denitration reducing agent by using the urea hydrolysis is mature day by day.

The urea hydrolysis reactor is the core equipment of urea hydrolysis ammonia production system, and urea solution with concentration of about 50% enters the hydrolysis reactor and is heated to a certain temperature and pressure to generate hydrolysis reaction to generate NH as main component₃、CO₂And the hydrolysis product gas of the water vapor enters a denitration reactor.

At present, a conventional urea hydrolysis reactor is provided with a product outlet pipeline which is vertically upwards arranged, the root of the contact part of the pipeline and the hydrolysis reactor is provided with a layer of filter screen, product gas vertically upwards flows out of the reactor after being filtered by the filter screen, the filter screen is easily abraded or blocked after long-term operation, and online replacement cannot be completed. If the abrasion is serious, the continuous operation has poor filtering effect, and partial impurities generated by hydrolysis enter a subsequent valve and a pipeline to cause the valve blockage phenomenon; if the blockage is serious, the product airflow is not smooth, the overpressure in the hydrolysis reactor is easily caused, and the action of a safety valve is triggered.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a filtering device for an outlet of a urea hydrolysis reactor, which can realize online replacement or flushing, maintain the stability of a filter, improve the filtering effect, prevent the blockage of a valve and a pipeline, and ensure the safety and continuous and stable operation of the urea hydrolysis reactor.

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

the utility model provides a urea hydrolysis reactor export filter equipment, includes the parallelly connected filter tube who sets up of two tunnel, and the inlet end of two tunnel filter tubes is connected with urea hydrolysis reactor's exit end, sets gradually first valve, filter, second valve and adjusting device on every filter tube, and filter detachable connects on filter tube.

Preferably, a flushing water pipeline is connected between the filter and the first valve, and a drainage pipeline is connected between the filter and the second valve.

Preferably, a third valve is provided between the filter and the flush water line.

Preferably, the inlet end of the flush water line is connected to a urea section drain pump.

Preferably, the outlet end of the drain line is connected to a urea zone wastewater pond.

Preferably, the inlet and the outlet of the filter are respectively provided with a pressure detection device.

Preferably, the adjusting device adopts a flow rate adjusting valve.

Preferably, the filter is made of stainless steel material.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model sets two filter pipelines which are mutually standby, when one filter pipeline runs, the first valve, the second valve and the adjusting device on the branch are all in an open state, and the first valve, the second valve and the adjusting device on the standby branch are all in a closed state, when the filter on the running pipeline is seriously worn or blocked, the online replacement can be carried out immediately, namely, the first valve, the second valve and the adjusting device on the standby branch are firstly opened, so that the filter on the standby branch can continuously work to filter hydrolysis product gas, the phenomenon that the filter effect is poor due to serious wear, and part of impurities generated by hydrolysis cannot be filtered completely and enter the following valves and pipelines to cause the blockage of the valves is avoided, the filter device provided by the utility model can timely replace the filter on line, and the filter effect and the filter quality of the filter are ensured at any time, the normal operation of the urea hydrolysis reactor is not influenced, then the first valve, the second valve and the adjusting device on the original operation branch are closed, and the filter on the original operation branch is disassembled and replaced on line, so that the subsequent filtering operation can be continuously and stably carried out.

Furthermore, a flushing water pipeline is connected between the filter and the first valve, and a third valve is arranged between the filter and the flushing water pipeline. In the utility model, the front end of each filter of each filtering pipeline is connected with a flushing water pipeline, so that the filter can be replaced according to the mode, if the filter is not seriously abraded, only more impurities in the hydrolysis product gas are filtered and contained in the filter, a third valve between the filter and the flushing water pipeline can be opened, the pressure and the flow of flushing water on the pipeline can be controlled, flushing water is injected into the filter through the flushing water pipeline to flush the filter on line, and a blockage is cleaned, so that the filter can normally work again, the filter does not need to be replaced all the time, the service life of the filter is prolonged, the cost of a filtering device is reduced, and the economy is improved.

Furthermore, the inlet and the outlet of the filter are respectively provided with a pressure detection device, the pressure detection devices are arranged at the inlet and the outlet of the filter, so that the pressure difference value before and after filtration of the operating branch can be detected in real time, when the pressure difference value is overlarge, the fact that more blockages exist in the filter in the branch, the filtration quality of the filter is reduced, another filtering branch can be switched immediately, and the continuous and stable operation of the filtration work is ensured.

Drawings

FIG. 1 is a schematic view of the arrangement of the outlet filtering device of the urea hydrolysis reactor according to the present invention.

In the figure, the filter line A, B; first valves 1A, 1B; second valves 2A, 2B; third valves 3A, 3B; fourth valves 4A, 4B; filters 5A, 5B; adjusting devices 6A, 6B; a urea zone drain pump 7; a urea hydrolysis reactor 8.

Detailed Description

The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the utility model.

The utility model provides a urea hydrolysis reactor outlet filtering device, which redesigns a product gas outlet pipeline of an existing urea hydrolysis reactor 8, and comprises two filtering pipelines A and B which are arranged in parallel as shown in figure 1, wherein the gas inlet ends of the two filtering pipelines A and B are connected with the outlet end of the urea hydrolysis reactor 8, first valves 1A and 1B, filters 5A and 5B, second valves 2A and 2B and adjusting devices 6A and 6B are sequentially arranged on each filtering pipeline A and B, and the filters 5A and 5B are detachably connected on the filtering pipelines A and B.

In the utility model, two filtering pipelines A and B are arranged and stand by with each other, when one filtering pipeline A runs, the first valve 1A, the second valve 2A and the adjusting device 6A on the branch are all in an open state, and the first valve 1B, the second valve 2B and the adjusting device 6B on the standby branch B are all in a closed state, when the filter 1A on the running pipeline A is seriously worn or blocked, online replacement can be immediately carried out, namely, the first valve 1B, the second valve 2B and the adjusting device 6B on the standby branch B are opened, so that the filter 5B on the standby branch B can continuously work to filter hydrolysis product gas, and the phenomena that the filtering effect is poor due to serious wear, and part of impurities generated by hydrolysis cannot be filtered completely and enter the following valves and pipelines to cause valve blocking are avoided, the filtering device provided by the utility model can timely replace the filters 5A and 5B on line, ensure the filtering effect and the filtering quality of the filters 5A and 5B at any time, does not influence the normal operation of the urea hydrolysis reactor 8, then close the first valve 1A, the second valve 2A and the adjusting device 6A on the original operation branch A, and detach and replace the filter 5A on the original operation branch A on line, so that the subsequent filtering work can be continuously and stably carried out.

In this embodiment, the regulating device employs a flow rate regulating valve for regulating the flow rate of the product gas, which serves as a conduit isolation when the filter is replaced or flushed.

In this embodiment, a flushing pipe is connected between the filters 5A and 5B and the first valves 1A and 1B, and a drainage pipe is connected between the filters 5A and 5B and the second valves 1A and 1B.

In this embodiment, third valves 3A, 3B are provided between the filters 5A, 5B and the flush water line.

In the utility model, the front end of each filter 5A, 5B of each filtering pipeline A, B is connected with a flushing water pipeline, except that the filters 5A, 5B can be replaced according to the mode, if the filters 5A, 5B are not seriously worn, only the filters 5A, 5B filter and contain more impurities in the hydrolysis product gas, the third valves 3A, 3B between the filters 5A, 5B and the flushing water pipeline can be opened, the pressure and the flow of flushing water on the pipeline can be controlled, flushing water is injected into the filters 5A, 5B through the flushing water pipeline to clean the blockage on line, the filters 5A, 5B can normally work again, the filters 5A, 5B do not need to be replaced all the time, the service lives of the filters 5A, 5B are prolonged, the cost of the filtering device is reduced, and the economy is improved.

In this embodiment, the entrance point of flushing water pipeline is connected with urea district drain pump 7, can directly be connected flushing water pipeline and urea district drain pump 7, utilizes urea district drain pump 7 to wash filter 5A, 5B, realizes the circulation circuit in the urea hydrolysis reaction, reuse, reduce cost.

In the embodiment, the outlet end of the drainage pipeline is connected with the urea area wastewater pool, the wastewater after impurity washing is directly discharged into the urea area wastewater pool to carry out unified treatment on the wastewater, a waste liquid collecting device is not additionally arranged, the device and the filtering operation are simplified, and the efficiency is improved.

In this embodiment, the drain line is provided with fourth valves 4A, 4B.

In the embodiment, the inlets and the outlets of the filters 5A and 5B are respectively provided with the pressure detection devices, the pressure detection devices are arranged at the inlets and the outlets of the filters 5A and 5B, so that the pressure difference value before and after filtration of the operating branch can be detected in real time, when the pressure difference value is overlarge, the fact that more blockages exist in the filter in the branch is proved, the filtration quality of the filters 5A and 5B is reduced, the other filtration branch can be switched immediately, and the continuous and stable operation of the filtration work is ensured.

In the embodiment, the filters 5A and 5B are preferably arranged in the middle of the pipeline, so that a better filtering effect can be achieved, the situation that the product gas is mixed with impurities in subsequent pipelines after being filtered by the filters 5A and 5B due to the filters 5A and 5B being arranged in front can be avoided, the filtering is not thorough, or the situation that the product gas blocks the filtering pipelines a and B before flowing through the filters 5A and 5B due to the filters 5A and 5B being arranged too far back can not be filtered normally, so that the optimal filtering effect can be achieved by arranging the filters in the middle.

In this embodiment, the filters 5A and 5B are made of stainless steel.

In this embodiment, the filters 5A and 5B are detachably connected to the filter pipe by means of flanges, sealing fasteners, or the like.

The present invention is not limited to the above-described preferred embodiments, and various other forms of urea hydrolysis reactor outlet filtration devices can be devised by anyone in light of the present invention. All equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.

Claims (8)

1. The utility model provides a urea hydrolysis reactor export filter equipment which characterized in that, includes the parallelly connected filter tube who sets up of two tunnel, and the inlet end of two tunnel filter tube is connected with the exit end of urea hydrolysis reactor (8), sets gradually first valve, filter, second valve and adjusting device on every filter tube, and filter detachable connects on filter tube.

2. The urea hydrolysis reactor outlet filter apparatus of claim 1, wherein a flush line is connected between the filter and the first valve, and a drain line is connected between the filter and the second valve.

3. The urea hydrolysis reactor outlet filter apparatus of claim 2, wherein a third valve is disposed between the filter and the flush water line.

4. A urea hydrolysis reactor outlet filter device according to claim 2, characterized in that the inlet end of the flushing water line is connected to a urea zone hydrophobic pump (7).

5. The urea hydrolysis reactor outlet filter apparatus of claim 2, wherein an outlet end of the drain line is connected to a urea zone sump.

6. The urea hydrolysis reactor outlet filter device of claim 1, wherein the inlet and the outlet of the filter are respectively provided with a pressure detection device.

7. The urea hydrolysis reactor outlet filter assembly of claim 1, wherein the adjustment means comprises a flow rate adjustment valve.

8. The urea hydrolysis reactor outlet filter apparatus of claim 1, wherein the filter is made of stainless steel.

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