CN109896641B - Protective agent for heating circulation system of gas wall-mounted boiler - Google Patents

Abstract

The invention relates to a protective agent for a heating circulation system of a gas wall-mounted boiler, which consists of sodium gluconate, disodium ethylene diamine tetraacetate, polyquaternary ammonium salt, p-hydroxybenzoic acid and tap water. The protective agent is added into the heating circulating system of the wall-mounted gas boiler, so that the corrosion of tap water, calcium-magnesium compounds and microorganisms to heat exchange equipment can be effectively prevented, the safe operation coefficient and the heat exchange efficiency of the wall-mounted gas boiler are greatly ensured, and the service life of the wall-mounted gas boiler is prolonged.

Description

Protective agent for heating circulation system of gas wall-mounted boiler

Technical Field

The invention relates to a protective agent for protecting a heating circulation system of a gas wall-mounted boiler by adopting organic matters.

Background

Wall-mounted gas stoves have been in europe for nearly a hundred years and the production of wall-mounted gas stoves is a well-established industry. The main producing countries are Germany, Spain, France, Italy, UK, etc. Most european families adopt wall-mounted furnaces for heating and bathing.

The industry of the Chinese gas wall-mounted boiler has been developed for more than thirty years, because the coal-fired boiler is changed into the clean gas wall-mounted boiler, the expansion and the development of the gas heating market are brought by the enrichment of clean gas energy, the supply of the gas energy is continuously increased, the civil gas business is vigorously developed, numerous families in cities are involved in the field of the gas wall-mounted boiler, and a new page is opened for the history of the gas boiler in China. In 2017, the sales volume (without export and substitute) of the gas wall hanging furnace is 450.8 thousands, and the increase is 171% on the same scale.

A great number of heating users of the wall-mounted boiler in China are concentrated in the north, and the water quality in the north is high in hardness. In the whole heating system of the wall-mounted boiler, water is a medium for transferring heat and flows in the wall-mounted boiler, a pipeline, a water separator and external heat exchange equipment. The wall-mounted gas boiler adopts a household heating mode, a household is taken as a unit, circulating water in the wall-mounted gas boiler in the household is basically local tap water, and the tap water flows through pipelines of the wall-mounted gas boiler to cause the following problems:

(1) the tap water body for heating operation can corrode the whole heat exchange system, so that the safe operation coefficient of the wall-mounted furnace is reduced, and the service life of the wall-mounted furnace is prolonged.

(2) Calcium and magnesium ions in the water are separated out after the circulating water is heated to generate a large amount of hard water scales, the water scales can not only corrode the whole heat exchange system, but also reduce the safe operation coefficient, the heat exchange efficiency and the service life of the wall-mounted furnace.

(3) The microorganisms can breed in a large number when circulating water runs at a long time with temperature, biological slime is generated through deposition and can be continuously accumulated on the inner walls of the wall-mounted furnace, the pipeline, the water separator and the external heat exchange equipment, the microorganisms and the slime can corrode the whole heat exchange system, and the operation coefficient, the heat exchange efficiency and the service life of the wall-mounted furnace can be reduced.

Disclosure of Invention

In order to thoroughly solve the problems, the invention aims to provide a protective agent for a heating circulation system of a gas wall-hanging stove. The protective agent can be directly added into a heating circulating system of a gas wall-mounted boiler to protect wall-mounted boiler tubes, pipelines, water distributors and external heat exchange equipment in the circulating system of the wall-mounted boiler. The wall-mounted boiler can prevent the circulating water body from corroding heat exchange equipment and can also prevent calcium and magnesium ions in tap water from being separated out, so that the separated calcium and magnesium compounds are prevented from corroding the heat exchange equipment, and the growth of microorganisms in the circulating water body can be prevented from corroding the heat exchange equipment by microorganisms and biological slime, so that the safe operation coefficient and the heat exchange efficiency of the wall-mounted boiler are greatly ensured, and the service life of the wall-mounted boiler is prolonged.

The purpose of the invention is realized by the following technical scheme:

a protective agent for a heating circulation system of a gas wall-mounted boiler comprises the following raw materials in parts by weight:

22.87 to 35.15 percent of sodium gluconate;

0.76 to 5.86 percent of disodium ethylene diamine tetraacetate

0.08 to 0.29 percent of polyquaternium;

0.04-0.12 percent of p-hydroxybenzoic acid and 58.58-76.25 percent of tap water.

A preparation method of a protective agent for a heating circulation system of a gas wall-hanging furnace,

at normal temperature, taking tap water, adding sodium gluconate and disodium ethylene diamine tetraacetate into the tap water while stirring, sequentially adding polyquaternium and p-hydroxybenzoic acid after the sodium gluconate and the disodium ethylene diamine tetraacetate are completely dissolved, and uniformly stirring to prepare the protective agent.

The prepared protective agent is liquid, and the color of the protective agent is colorless or light yellow liquid.

The reaction mechanism of the protective agent is as follows:

the sodium gluconate and the disodium ethylene diamine tetraacetate in the protective agent have good metal chelation performance, and can chelate metal ions in a heating water system of the wall-hanging stove, so that calcium and magnesium ions in the heating water system of the wall-hanging stove are prevented from being separated out to form white scale. The polyquaternium belongs to a non-oxidative bactericide flocculant, has broad-spectrum and high-efficiency sterilization and algae removal capability, can effectively control the propagation of bacteria and algae and the growth of slime in a wall-hanging stove heating water system, has good slime stripping effect and certain dispersion and permeation effects, and simultaneously has certain oil removal and deodorization capabilities and corrosion inhibition effects. The p-hydroxybenzoic acid has very strong antibacterial property, can effectively prevent the bacteria from breeding in the wall-hanging stove heating circulating water system, and can effectively reduce the corrosion of the bacteria to the wall-hanging stove system so as to protect the whole wall-hanging stove heating system.

The invention has the advantages that:

(1) the drug effect is long, and no toxicity or foam exists; preparing the protective agent at normal temperature.

(2) The slow release effect is gradually increased along with the temperature rise of the heating system of the wall-hanging stove. The corrosion inhibition effect is very ideal for a system with temperature varying from low temperature to high temperature.

(3) Is environment-friendly and safe, and can be directly discharged without public hazard.

(4) The corrosion of tap water, calcium-magnesium compounds and microorganisms to heat exchange equipment can be effectively prevented, so that the safe operation coefficient and the heat exchange efficiency of the wall-mounted boiler are greatly ensured, and the service life of the wall-mounted boiler is prolonged.

Detailed Description

Example 1

At room temperature, 70.7g of 25 ℃ Lanzhou city tap water is added into a solvent preparation device, 25g of sodium gluconate and 4g of disodium ethylene diamine tetraacetate are added while stirring, and after complete dissolution, 0.2g of polyquaternary ammonium salt and 0.1 g of p-hydroxybenzoic acid are sequentially added. Stirring for 35 minutes to completely dissolve the protective agent, and filtering the solution by a filter screen of 200 meshes to obtain clear solution, namely the protective agent.

Experimental example 1

100g of the protective agent was poured into a clean 2000ml glass beaker and tap water from Lanzhou city was added to 1000 ml. Taking 20# steel and red copper corrosion test pieces, and according to the specification of HG/T3523: the surface treatment is clean, the weight is respectively carried out, 22.335g of red copper test piece and 20.101g of 20# steel are respectively put into a beaker filled with 100g of protective agent, then the glass beaker is put into a constant temperature water bath, the temperature is controlled to be 50 +/-2 ℃, after the glass beaker is placed for 30 days, two test pieces and a new test piece are taken out from the beaker to be respectively visually observed, the surfaces of the two test pieces are found to be clean and fresh, and the weight is respectively weighed, the weight of the red copper test piece is 22.335g, and the weight of the 20# steel is 20.101 g. The weight of the test piece is unchanged before and after, which shows that the prepared protective agent effectively prevents the tap water body from corroding metal. The color of the experimental water body is visually observed, the experimental water body is clear and transparent, and no white scale and biological slime are found, so that the preparation is proved to be capable of effectively preventing the metal ions in the tap water in Lanzhou city from being separated out and preventing the bacteria and algae in the experimental water body from being propagated.

Example 2:

at room temperature, 66.7g of Xining city tap water is added into a solvent preparation device, 30g of sodium gluconate and 3g of disodium ethylene diamine tetraacetate are added while stirring, and after the sodium gluconate and the disodium ethylene diamine tetraacetate are completely dissolved, 0.18g of polyquaternary ammonium salt and 0.12 g of p-hydroxybenzoic acid are sequentially added. Stirring for 35 minutes to completely dissolve the protective agent, and filtering the solution by a filter screen of 200 meshes to obtain clear solution, namely the protective agent.

Experimental example 2

100g of the above protectant was poured into a clean 2000ml glass beaker and water from Xianning was added to 1000 ml. The method comprises the steps of taking 20# steel and red copper corrosion test pieces, respectively carrying out surface treatment on the 20# steel and the red copper corrosion test pieces according to the specification of HG/T3523, respectively weighing 22.189g of the red copper test pieces and 20.036g of the 20# steel, then separately placing the red copper corrosion test pieces and the 20# steel into a beaker filled with a protective agent, placing a glass beaker into a thermostatic water bath, controlling the temperature to be 45 +/-2 ℃, after placing for 30 days, taking out the two test pieces and a new test piece for visual inspection, respectively finding that the surfaces of the two test pieces are clean and fresh, respectively weighing 22.189g of the red copper test pieces and 20.036g of the 20# steel. The fact that the weight of the test piece is unchanged before and after shows that the protective agent prepared by the invention can effectively prevent the tap water body from corroding metals. The color of the experimental water body is visually observed, the experimental water body is clear and transparent, and no white scale and biological slime are found, so that the preparation is proved to be capable of effectively preventing the separation of tap water metal ions in the Xining city and preventing the reproduction of bacteria and algae in the experimental water body.

Example 3:

at room temperature, 66.7g of Yinchuan city tap water was added into a solvent preparation dispenser, and 35g of sodium gluconate and 2g of disodium ethylenediaminetetraacetate were added while stirring. After complete dissolution, 0.15g of polyquaternium and 0.05 g of p-hydroxybenzoic acid were added in this order. Stirring for 35 minutes to completely dissolve the protective agent, and filtering the solution by a filter screen of 200 meshes to obtain clear solution, namely the protective agent.

Experimental example 3

100g of the above protectant was poured into a clean 2000ml glass beaker and 1000ml of plain Yinchuan tap water was added. The method comprises the steps of taking 20# steel and red copper corrosion test pieces, respectively carrying out surface treatment on the 20# steel and the red copper corrosion test pieces according to the specification of HG/T3523, respectively weighing, separately putting 22.099g of the red copper test pieces and 20.128g of the 20# steel, separately putting the red copper test pieces and the 20# steel into beakers containing protective agents, putting the glass beakers into a constant-temperature water bath, controlling the temperature to be 55 +/-2 ℃, after standing for 30 days, taking out the two test pieces and a new test piece, respectively carrying out visual inspection, finding that the surfaces of the two test pieces are clean and fresh, respectively weighing, 22.099g of the red copper test pieces and 20.128g of the 20# steel. The fact that the weight of the test piece is unchanged before and after the test proves that the protective agent prepared by the invention can effectively prevent the tap water from corroding metals. The experimental water body color is visually observed, the experimental water body is clear and transparent, and no white scale and biological slime are found, so that the preparation is proved to be capable of effectively preventing the precipitation of metal ions in tap water in Lanzhou city and preventing the propagation of bacteria and algae in the experimental water body.

Claims (1)

1. A heating circulating water protective agent for a gas wall-hanging furnace comprises the following raw materials in parts by weight:

22.87 to 35.15 percent of sodium gluconate;

0.76 to 5.86 percent of disodium ethylene diamine tetraacetate;

0.08 to 0.29 percent of polyquaternium;

0.04-0.12 percent of p-hydroxybenzoic acid and 58.58-76.25 percent of tap water.