CN212275295U - Pressurized ammonia water sampler for ammonia water absorption refrigeration system - Google Patents

Abstract

The utility model discloses a pressurization aqueous ammonia sampler for aqueous ammonia absorption refrigerating system, including sampler barrel, sealed lid, annular gasket, sample valve and sampling tube, sealed lid is connected with the sampler barrel is detachable, and annular gasket is located between sampler barrel and the sealed lid, and the one end of sampling tube runs through sealed lid and stretches into the inside of sampler barrel, and the other end at the sampling tube is installed to the sample valve. The utility model is used for the higher basic solution's of concentration sample under the ammonia absorption refrigeration system that is higher than the atmospheric pressure state, and then available titration method is measured and is calculated basic solution concentration.

Description

Pressurized ammonia water sampler for ammonia water absorption refrigeration system

Technical Field

The utility model relates to an ammonia absorption formula refrigeration technology field especially relates to a pressurization ammonia water sampler.

Background

In the industrial production process of China, medium-low grade waste heat widely exists in industries such as electric power, cement, steel and the like, and the ammonia absorption type refrigerating system can effectively recover the industrial waste heat for refrigeration.

In the research process of the ammonia absorption refrigeration system, particularly an experimental device, the concentration of a basic solution of an operation system needs to be measured, and generally, the concentration of ammonia can be measured by adopting a titration method, so that the basic solution of the device needs to be sampled on line. The saturated concentration of ammonia water is about 28% at normal temperature and pressure (e.g. 30 deg.C, 0.1 MPa). In a typical ammonia water single-effect/double-effect absorption type refrigerating device, a base solution is positioned in a pipeline behind an absorber and in front of a solution pump, the operation temperature is close to normal temperature, but the operation pressure is higher than normal pressure, and the operation concentration is also far higher than 28%, so if the base solution in a pressurized state is directly sampled and then subjected to titration analysis under normal pressure, a base solution sample is reduced from higher pressure to normal pressure, ammonia in the sample is immediately volatilized into air until saturated ammonia water under normal temperature and normal pressure is formed, and the real concentration of the base solution sample cannot be measured.

Chinese patent CN 208043766U discloses an ammonia water sampler for measuring ammonia water concentration by titration, which can reduce the time from sampling to smelling ammonia water in the titration process or reduce the concentration of smelling ammonia water, but the sampler is only suitable for sampling ammonia water at normal pressure, and cannot sample ammonia water with higher concentration in a pressurized state.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a pressurization aqueous ammonia sampler that structural design is reasonable for the higher basic solution's of concentration under the higher atmospheric pressure state in the aqueous ammonia absorption refrigerating system sample, and then available titration measures and calculates basic solution concentration.

The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a pressurization aqueous ammonia sampler for aqueous ammonia absorption refrigerating system, characterized by, includes sampler barrel, sealed lid, annular gasket, sample valve and sampling tube, sealed lid and detachable the being connected of sampler barrel, annular gasket is located between sampler barrel and the sealed lid, the one end of sampling tube runs through sealed lid and stretches into the inside of sampler barrel, the other end at the sampling tube is installed to the sample valve.

Furthermore, the sampling tube and the sealing cover are in a detachable and sealed connection mode capable of bearing certain pressure, and preferably are in internal thread connection.

Furthermore, the annular gasket is made of an elastic material which is not easily corroded by ammonia water, plays a role in sealing, and is preferably a polytetrafluoroethylene gasket; the material other than the annular gasket is steel, preferably stainless steel.

Compared with the prior art, the utility model, have following advantage and effect:

1. the existing ammonia water sampling device is mostly suitable for sampling ammonia water under the normal pressure state, and cannot sample the pressurized ammonia water solution for the purpose of measuring the concentration by a chemical titration method. The utility model provides a pressurization aqueous ammonia sampler can take a sample to the higher aqueous ammonia solution of concentration under the higher atmospheric pressure state in the aqueous ammonia absorption refrigerating system, and then the concentration that available chemical titration method measured and calculated the sample solution concentration.

2. Simple structure easily processes, and is with low costs, convenient operation moreover.

3. The ammonia water in a pressurized state can be suitable for chemical titration method measurement, and the measurement precision is high.

Drawings

Fig. 1 is a schematic structural diagram of a pressurized ammonia water sampler in embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of a pressurized ammonia water sampler in embodiment 2 of the present invention.

In the figure: sampling tube 1, sealed lid 2, annular gasket 3, sample valve 4, sampling tube 5, pipeline 6, valve 7, cutting ferrule 8.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Example 1.

As shown in figure 1, a pressurization aqueous ammonia sampler for aqueous ammonia absorption refrigerating system, including sampler barrel 1, sealed lid 2, annular gasket 3, sample valve 4 and sampling tube 5, sealed lid 2 is connected with sampler barrel 1 is detachable, and annular gasket 3 is located between sampler barrel 1 and sealed lid 2, and sealed lid 2 is run through to the one end of sampling tube 5 and stretches into the inside of sampler barrel 1, and the other end at sampler tube 5 is installed to sample valve 4.

Wherein, sampling tube 1 and sealed lid 2 adopt threaded connection.

Wherein, the annular gasket 3 is made of polytetrafluoroethylene.

Wherein, the sampling tube 1, the sealing cover 2 and the sampling tube 5 are made of stainless steel.

The using method comprises the following steps:

1) weighing the sampler with mass m₁And recording;

2) pouring a certain amount of water into the sampling tube 1, weighing again with mass m₂And recording;

3) connecting the sampling tube 5 with the sampling point, opening the sampling valve 4 to perform online sampling, closing the sampling valve 4 after sampling is completed, taking down the sampler and weighing, wherein the mass is m₃And recording; step 2, introducing a certain amount of water in advance to dilute the concentration of the ammonia water sample so that the concentration of the ammonia water sample is reduced to be below the saturated concentration of the ammonia water at normal temperature and normal pressure;

4) opening the sampling valve 4, taking out a certain amount of sample, and measuring the concentration of ammonia water in the sampler to be x by a chemical titration method₁；

5) Basic solution ammonia concentration x in device₂Can be calculated by the following formula

x₂＝(m₃-m₁)×x₁/(m₃-m₂)×100％

Example 2.

According to fig. 2, a pressurization aqueous ammonia sampler for aqueous ammonia absorption refrigerating system, including sampler barrel 1, sealed lid 2, annular gasket 3, sample valve 4 and sampling tube 5, sealed lid 2 and detachable the being connected of sampler barrel 1, annular gasket 3 is located between sampler barrel 1 and sealed lid 2, the inside of sealed lid 2 and stretching into sampler barrel 1 is run through to the one end of sampling tube 5, sample valve 4 installs the other end at sampler tube 5, aqueous ammonia sample position is in pipeline 6, install valve 7 on the pipeline of sample point position and be connected with sampler tube 5 through cutting ferrule 8, sampler barrel 1 and sealed lid 2 adopt threaded connection, the material of annular gasket 3 is polytetrafluoroethylene, all the other parts material is 06Cr25Ni20 stainless steel.

The using method comprises the following steps:

1) weighing the sampler with mass m₁510g, and record;

2) unscrewing a sealing cover 2 on the sampler, pouring a certain amount of water into a sampling cylinder 1, screwing the sealing cover 2 on the sampling cylinder, weighing again, wherein the mass is m₂560g, and record;

3) sampling point position pipe connection of sampling tube 5 and pipeline 6 is through cutting ferrule 8, then opens valve 7 and sample valve 4 in proper order, takes a sample on line, closes valve 7 and sample valve 4 in proper order after the sample is accomplished, takes off the sampler through cutting ferrule 8 and then weighs, and the quality is m₃660g and record;

4) opening the sampling valve 4 after disassembling the sampler, taking out a certain amount of sample, and measuring the mass concentration of ammonia water in the sampler as x by chemical titration₁＝0.15；

5) Mass concentration x of ammonia water in the device₂Can be calculated by the following formula

x₂＝(660-510)×0.15/(560-510)×100％＝45％

Those not described in detail in this specification are well within the skill of the art.

In addition, it should be noted that the above contents described in the present specification are only illustrations of the structure of the present invention. All equivalent changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions by those skilled in the art may be made to the described embodiments without departing from the scope of the invention as defined in the accompanying claims.

Claims (4)

1. The utility model provides a pressurization aqueous ammonia sampler for aqueous ammonia absorption refrigerating system, characterized by, including sampler barrel (1), sealed lid (2), annular gasket (3), sample valve (4) and sampling tube (5), sealed lid (2) are connected with sampler barrel (1) is detachable, annular gasket (3) are located between sampler barrel (1) and sealed lid (2), the one end of sampling tube (5) runs through sealed lid (2) and stretches into the inside of sampler barrel (1), the other end at sampler tube (5) is installed in sample valve (4).

2. A pressurized ammonia water sampler for an ammonia absorption refrigeration system according to claim 1 wherein the sampling cylinder (1) and the sealing cap (2) are in threaded connection.

3. A pressurized ammonia water sampler for an ammonia absorption refrigeration system according to claim 1, wherein the annular gasket (3) is made of teflon.

4. The pressurized ammonia water sampler for ammonia absorption refrigeration system according to claim 1, wherein the sampling tube (1), the sealing cap (2) and the sampling tube (5) are made of steel.

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